src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include <stdio.h>
  22 #include <vector>
  23 #include <deque>
  24 #include "globals.h"
  25 #include "inspircd_config.h"
  26 #include "hash_map.h"
  27 #include "configreader.h"
  28 #include "users.h"
  29 #include "channels.h"
  30 #include "modules.h"
  31 #include "commands.h"
  32 #include "commands/cmd_whois.h"
  33 #include "commands/cmd_stats.h"
  34 #include "socket.h"
  35
  36 #include "inspircd.h"
  37 #include "wildcard.h"
  38 #include "inspstring.h"
  39 #include "hashcomp.h"
  40 #include "xline.h"
  41 #include "typedefs.h"
  42 #include "cull_list.h"
  43 #include "aes.h"
  44
  45 #define nspace __gnu_cxx
  46
  47 /*
  48  * The server list in InspIRCd is maintained as two structures
  49  * which hold the data in different ways. Most of the time, we
  50  * want to very quicky obtain three pieces of information:
  51  *
  52  * (1) The information on a server
  53  * (2) The information on the server we must send data through
  54  *     to actually REACH the server we're after
  55  * (3) Potentially, the child/parent objects of this server
  56  *
  57  * The InspIRCd spanning protocol provides easy access to these
  58  * by storing the data firstly in a recursive structure, where
  59  * each item references its parent item, and a dynamic list
  60  * of child items, and another structure which stores the items
  61  * hashed, linearly. This means that if we want to find a server
  62  * by name quickly, we can look it up in the hash, avoiding
  63  * any O(n) lookups. If however, during a split or sync, we want
  64  * to apply an operation to a server, and any of its child objects
  65  * we can resort to recursion to walk the tree structure.
  66  */
  67
  68 using irc::sockets::MatchCIDR;
  69
  70 class ModuleSpanningTree;
  71 static ModuleSpanningTree* TreeProtocolModule;
  72 static InspIRCd* ServerInstance;
  73
  74 /* Any socket can have one of five states at any one time.
  75  * The LISTENER state indicates a socket which is listening
  76  * for connections. It cannot receive data itself, only incoming
  77  * sockets.
  78  * The CONNECTING state indicates an outbound socket which is
  79  * waiting to be writeable.
  80  * The WAIT_AUTH_1 state indicates the socket is outbound and
  81  * has successfully connected, but has not yet sent and received
  82  * SERVER strings.
  83  * The WAIT_AUTH_2 state indicates that the socket is inbound
  84  * (allocated by a LISTENER) but has not yet sent and received
  85  * SERVER strings.
  86  * The CONNECTED state represents a fully authorized, fully
  87  * connected server.
  88  */
  89 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  90
  91 /* Foward declarations */
  92 class TreeServer;
  93 class TreeSocket;
  94
  95 /* This variable represents the root of the server tree
  96  * (for all intents and purposes, it's us)
  97  */
  98 TreeServer *TreeRoot;
  99
 100 /* This hash_map holds the hash equivalent of the server
 101  * tree, used for rapid linear lookups.
 102  */
 103 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
 104 server_hash serverlist;
 105
 106 typedef nspace::hash_map<std::string, userrec*> uid_hash;
 107 typedef nspace::hash_map<std::string, char*> sid_hash;
 108
 109 /* More forward declarations */
 110 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 111 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 112 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 113 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 114 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 115 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 116 void ReadConfiguration(bool rebind);
 117
 118 /* Flatten links and /MAP for non-opers */
 119 bool FlatLinks;
 120 /* Hide U-Lined servers in /MAP and /LINKS */
 121 bool HideULines;
 122
 123 std::vector<std::string> ValidIPs;
 124
 125 class UserManager : public classbase
 126 {
 127         uid_hash uids;
 128         sid_hash sids;
 129  public:
 130         UserManager()
 131         {
 132                 uids.clear();
 133                 sids.clear();
 134         }
 135
 136         std::string UserToUID(userrec* user)
 137         {
 138                 return "";
 139         }
 140
 141         std::string UIDToUser(const std::string &UID)
 142         {
 143                 return "";
 144         }
 145
 146         std::string CreateAndAdd(userrec* user)
 147         {
 148                 return "";
 149         }
 150
 151         std::string CreateAndAdd(const std::string &servername)
 152         {
 153                 return "";
 154         }
 155
 156         std::string ServerToSID(const std::string &servername)
 157         {
 158                 return "";
 159         }
 160
 161         std::string SIDToServer(const std::string &SID)
 162         {
 163                 return "";
 164         }
 165
 166         userrec* FindByID(const std::string &UID)
 167         {
 168                 return NULL;
 169         }
 170 };
 171
 172
 173 /* Each server in the tree is represented by one class of
 174  * type TreeServer. A locally connected TreeServer can
 175  * have a class of type TreeSocket associated with it, for
 176  * remote servers, the TreeSocket entry will be NULL.
 177  * Each server also maintains a pointer to its parent
 178  * (NULL if this server is ours, at the top of the tree)
 179  * and a pointer to its "Route" (see the comments in the
 180  * constructors below), and also a dynamic list of pointers
 181  * to its children which can be iterated recursively
 182  * if required. Creating or deleting objects of type
 183  i* TreeServer automatically maintains the hash_map of
 184  * TreeServer items, deleting and inserting them as they
 185  * are created and destroyed.
 186  */
 187
 188 class TreeServer : public classbase
 189 {
 190         InspIRCd* ServerInstance;               /* Creator */
 191         TreeServer* Parent;                     /* Parent entry */
 192         TreeServer* Route;                      /* Route entry */
 193         std::vector<TreeServer*> Children;      /* List of child objects */
 194         irc::string ServerName;                 /* Server's name */
 195         std::string ServerDesc;                 /* Server's description */
 196         std::string VersionString;              /* Version string or empty string */
 197         int UserCount;                          /* Not used in this version */
 198         int OperCount;                          /* Not used in this version */
 199         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 200         time_t NextPing;                        /* After this time, the server should be PINGed*/
 201         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 202
 203  public:
 204
 205         /* We don't use this constructor. Its a dummy, and won't cause any insertion
 206          * of the TreeServer into the hash_map. See below for the two we DO use.
 207          */
 208         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 209         {
 210                 Parent = NULL;
 211                 ServerName = "";
 212                 ServerDesc = "";
 213                 VersionString = "";
 214                 UserCount = OperCount = 0;
 215                 VersionString = ServerInstance->GetVersionString();
 216         }
 217
 218         /* We use this constructor only to create the 'root' item, TreeRoot, which
 219          * represents our own server. Therefore, it has no route, no parent, and
 220          * no socket associated with it. Its version string is our own local version.
 221          */
 222         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 223         {
 224                 Parent = NULL;
 225                 VersionString = "";
 226                 UserCount = OperCount = 0;
 227                 VersionString = ServerInstance->GetVersionString();
 228                 Route = NULL;
 229                 Socket = NULL; /* Fix by brain */
 230                 AddHashEntry();
 231         }
 232
 233         /* When we create a new server, we call this constructor to initialize it.
 234          * This constructor initializes the server's Route and Parent, and sets up
 235          * its ping counters so that it will be pinged one minute from now.
 236          */
 237         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 238                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 239         {
 240                 VersionString = "";
 241                 UserCount = OperCount = 0;
 242                 this->SetNextPingTime(time(NULL) + 60);
 243                 this->SetPingFlag();
 244
 245                 /* find the 'route' for this server (e.g. the one directly connected
 246                  * to the local server, which we can use to reach it)
 247                  *
 248                  * In the following example, consider we have just added a TreeServer
 249                  * class for server G on our network, of which we are server A.
 250                  * To route traffic to G (marked with a *) we must send the data to
 251                  * B (marked with a +) so this algorithm initializes the 'Route'
 252                  * value to point at whichever server traffic must be routed through
 253                  * to get here. If we were to try this algorithm with server B,
 254                  * the Route pointer would point at its own object ('this').
 255                  *
 256                  *              A
 257                  *             / \
 258                  *          + B   C
 259                  *           / \   \
 260                  *          D   E   F
 261                  *         /         \
 262                  *      * G           H
 263                  *
 264                  * We only run this algorithm when a server is created, as
 265                  * the routes remain constant while ever the server exists, and
 266                  * do not need to be re-calculated.
 267                  */
 268
 269                 Route = Above;
 270                 if (Route == TreeRoot)
 271                 {
 272                         Route = this;
 273                 }
 274                 else
 275                 {
 276                         while (this->Route->GetParent() != TreeRoot)
 277                         {
 278                                 this->Route = Route->GetParent();
 279                         }
 280                 }
 281
 282                 /* Because recursive code is slow and takes a lot of resources,
 283                  * we store two representations of the server tree. The first
 284                  * is a recursive structure where each server references its
 285                  * children and its parent, which is used for netbursts and
 286                  * netsplits to dump the whole dataset to the other server,
 287                  * and the second is used for very fast lookups when routing
 288                  * messages and is instead a hash_map, where each item can
 289                  * be referenced by its server name. The AddHashEntry()
 290                  * call below automatically inserts each TreeServer class
 291                  * into the hash_map as it is created. There is a similar
 292                  * maintainance call in the destructor to tidy up deleted
 293                  * servers.
 294                  */
 295
 296                 this->AddHashEntry();
 297         }
 298
 299         int QuitUsers(const std::string &reason)
 300         {
 301                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 302                 const char* reason_s = reason.c_str();
 303                 std::vector<userrec*> time_to_die;
 304                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 305                 {
 306                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 307                         {
 308                                 time_to_die.push_back(n->second);
 309                         }
 310                 }
 311                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 312                 {
 313                         userrec* a = (userrec*)*n;
 314                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 315                         if (!IS_LOCAL(a))
 316                                 userrec::QuitUser(ServerInstance,a,reason_s);
 317                 }
 318                 return time_to_die.size();
 319         }
 320
 321         /* This method is used to add the structure to the
 322          * hash_map for linear searches. It is only called
 323          * by the constructors.
 324          */
 325         void AddHashEntry()
 326         {
 327                 server_hash::iterator iter;
 328                 iter = serverlist.find(this->ServerName.c_str());
 329                 if (iter == serverlist.end())
 330                         serverlist[this->ServerName.c_str()] = this;
 331         }
 332
 333         /* This method removes the reference to this object
 334          * from the hash_map which is used for linear searches.
 335          * It is only called by the default destructor.
 336          */
 337         void DelHashEntry()
 338         {
 339                 server_hash::iterator iter;
 340                 iter = serverlist.find(this->ServerName.c_str());
 341                 if (iter != serverlist.end())
 342                         serverlist.erase(iter);
 343         }
 344
 345         /* These accessors etc should be pretty self-
 346          * explanitory.
 347          */
 348
 349         TreeServer* GetRoute()
 350         {
 351                 return Route;
 352         }
 353
 354         std::string GetName()
 355         {
 356                 return ServerName.c_str();
 357         }
 358
 359         std::string GetDesc()
 360         {
 361                 return ServerDesc;
 362         }
 363
 364         std::string GetVersion()
 365         {
 366                 return VersionString;
 367         }
 368
 369         void SetNextPingTime(time_t t)
 370         {
 371                 this->NextPing = t;
 372                 LastPingWasGood = false;
 373         }
 374
 375         time_t NextPingTime()
 376         {
 377                 return NextPing;
 378         }
 379
 380         bool AnsweredLastPing()
 381         {
 382                 return LastPingWasGood;
 383         }
 384
 385         void SetPingFlag()
 386         {
 387                 LastPingWasGood = true;
 388         }
 389
 390         int GetUserCount()
 391         {
 392                 return UserCount;
 393         }
 394
 395         void AddUserCount()
 396         {
 397                 UserCount++;
 398         }
 399
 400         void DelUserCount()
 401         {
 402                 UserCount--;
 403         }
 404
 405         int GetOperCount()
 406         {
 407                 return OperCount;
 408         }
 409
 410         TreeSocket* GetSocket()
 411         {
 412                 return Socket;
 413         }
 414
 415         TreeServer* GetParent()
 416         {
 417                 return Parent;
 418         }
 419
 420         void SetVersion(std::string Version)
 421         {
 422                 VersionString = Version;
 423         }
 424
 425         unsigned int ChildCount()
 426         {
 427                 return Children.size();
 428         }
 429
 430         TreeServer* GetChild(unsigned int n)
 431         {
 432                 if (n < Children.size())
 433                 {
 434                         /* Make sure they  cant request
 435                          * an out-of-range object. After
 436                          * all we know what these programmer
 437                          * types are like *grin*.
 438                          */
 439                         return Children[n];
 440                 }
 441                 else
 442                 {
 443                         return NULL;
 444                 }
 445         }
 446
 447         void AddChild(TreeServer* Child)
 448         {
 449                 Children.push_back(Child);
 450         }
 451
 452         bool DelChild(TreeServer* Child)
 453         {
 454                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 455                 {
 456                         if (*a == Child)
 457                         {
 458                                 Children.erase(a);
 459                                 return true;
 460                         }
 461                 }
 462                 return false;
 463         }
 464
 465         /* Removes child nodes of this node, and of that node, etc etc.
 466          * This is used during netsplits to automatically tidy up the
 467          * server tree. It is slow, we don't use it for much else.
 468          */
 469         bool Tidy()
 470         {
 471                 bool stillchildren = true;
 472                 while (stillchildren)
 473                 {
 474                         stillchildren = false;
 475                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 476                         {
 477                                 TreeServer* s = (TreeServer*)*a;
 478                                 s->Tidy();
 479                                 Children.erase(a);
 480                                 DELETE(s);
 481                                 stillchildren = true;
 482                                 break;
 483                         }
 484                 }
 485                 return true;
 486         }
 487
 488         ~TreeServer()
 489         {
 490                 /* We'd better tidy up after ourselves, eh? */
 491                 this->DelHashEntry();
 492         }
 493 };
 494
 495 /* The Link class might as well be a struct,
 496  * but this is C++ and we don't believe in structs (!).
 497  * It holds the entire information of one <link>
 498  * tag from the main config file. We maintain a list
 499  * of them, and populate the list on rehash/load.
 500  */
 501
 502 class Link : public classbase
 503 {
 504  public:
 505          irc::string Name;
 506          std::string IPAddr;
 507          int Port;
 508          std::string SendPass;
 509          std::string RecvPass;
 510          unsigned long AutoConnect;
 511          time_t NextConnectTime;
 512          std::string EncryptionKey;
 513          bool HiddenFromStats;
 514 };
 515
 516 /* The usual stuff for inspircd modules,
 517  * plus the vector of Link classes which we
 518  * use to store the <link> tags from the config
 519  * file.
 520  */
 521 ConfigReader *Conf;
 522 std::vector<Link> LinkBlocks;
 523
 524 /* Yay for fast searches!
 525  * This is hundreds of times faster than recursion
 526  * or even scanning a linked list, especially when
 527  * there are more than a few servers to deal with.
 528  * (read as: lots).
 529  */
 530 TreeServer* FindServer(std::string ServerName)
 531 {
 532         server_hash::iterator iter;
 533         iter = serverlist.find(ServerName.c_str());
 534         if (iter != serverlist.end())
 535         {
 536                 return iter->second;
 537         }
 538         else
 539         {
 540                 return NULL;
 541         }
 542 }
 543
 544 /* Returns the locally connected server we must route a
 545  * message through to reach server 'ServerName'. This
 546  * only applies to one-to-one and not one-to-many routing.
 547  * See the comments for the constructor of TreeServer
 548  * for more details.
 549  */
 550 TreeServer* BestRouteTo(std::string ServerName)
 551 {
 552         if (ServerName.c_str() == TreeRoot->GetName())
 553                 return NULL;
 554         TreeServer* Found = FindServer(ServerName);
 555         if (Found)
 556         {
 557                 return Found->GetRoute();
 558         }
 559         else
 560         {
 561                 return NULL;
 562         }
 563 }
 564
 565 /* Find the first server matching a given glob mask.
 566  * Theres no find-using-glob method of hash_map [awwww :-(]
 567  * so instead, we iterate over the list using an iterator
 568  * and match each one until we get a hit. Yes its slow,
 569  * deal with it.
 570  */
 571 TreeServer* FindServerMask(std::string ServerName)
 572 {
 573         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 574         {
 575                 if (match(i->first.c_str(),ServerName.c_str()))
 576                         return i->second;
 577         }
 578         return NULL;
 579 }
 580
 581 /* A convenient wrapper that returns true if a server exists */
 582 bool IsServer(std::string ServerName)
 583 {
 584         return (FindServer(ServerName) != NULL);
 585 }
 586
 587
 588 class cmd_rconnect : public command_t
 589 {
 590         Module* Creator;
 591  public:
 592         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 593         {
 594                 this->source = "m_spanningtree.so";
 595                 syntax = "<remote-server-mask> <servermask>";
 596         }
 597
 598         void Handle (const char** parameters, int pcnt, userrec *user)
 599         {
 600                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 601                 /* Is this aimed at our server? */
 602                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 603                 {
 604                         /* Yes, initiate the given connect */
 605                         ServerInstance->WriteOpers("*** Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 606                         const char* para[1];
 607                         para[0] = parameters[1];
 608                         Creator->OnPreCommand("CONNECT", para, 1, user, true);
 609                 }
 610         }
 611 };
 612
 613
 614
 615 /* Every SERVER connection inbound or outbound is represented by
 616  * an object of type TreeSocket.
 617  * TreeSockets, being inherited from InspSocket, can be tied into
 618  * the core socket engine, and we cn therefore receive activity events
 619  * for them, just like activex objects on speed. (yes really, that
 620  * is a technical term!) Each of these which relates to a locally
 621  * connected server is assocated with it, by hooking it onto a
 622  * TreeSocket class using its constructor. In this way, we can
 623  * maintain a list of servers, some of which are directly connected,
 624  * some of which are not.
 625  */
 626
 627 class TreeSocket : public InspSocket
 628 {
 629         std::string myhost;
 630         std::string in_buffer;
 631         ServerState LinkState;
 632         std::string InboundServerName;
 633         std::string InboundDescription;
 634         int num_lost_users;
 635         int num_lost_servers;
 636         time_t NextPing;
 637         bool LastPingWasGood;
 638         bool bursting;
 639         AES* ctx_in;
 640         AES* ctx_out;
 641         unsigned int keylength;
 642         std::string ModuleList;
 643         std::map<std::string,std::string> CapKeys;
 644
 645  public:
 646
 647         /* Because most of the I/O gubbins are encapsulated within
 648          * InspSocket, we just call the superclass constructor for
 649          * most of the action, and append a few of our own values
 650          * to it.
 651          */
 652         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 653                 : InspSocket(SI, host, port, listening, maxtime)
 654         {
 655                 myhost = host;
 656                 this->LinkState = LISTENER;
 657                 this->ctx_in = NULL;
 658                 this->ctx_out = NULL;
 659         }
 660
 661         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 662                 : InspSocket(SI, host, port, listening, maxtime)
 663         {
 664                 myhost = ServerName;
 665                 this->LinkState = CONNECTING;
 666                 this->ctx_in = NULL;
 667                 this->ctx_out = NULL;
 668         }
 669
 670         /* When a listening socket gives us a new file descriptor,
 671          * we must associate it with a socket without creating a new
 672          * connection. This constructor is used for this purpose.
 673          */
 674         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 675                 : InspSocket(SI, newfd, ip)
 676         {
 677                 this->LinkState = WAIT_AUTH_1;
 678                 this->ctx_in = NULL;
 679                 this->ctx_out = NULL;
 680                 this->SendCapabilities();
 681         }
 682
 683         ~TreeSocket()
 684         {
 685                 if (ctx_in)
 686                         DELETE(ctx_in);
 687                 if (ctx_out)
 688                         DELETE(ctx_out);
 689         }
 690
 691         void InitAES(std::string key,std::string SName)
 692         {
 693                 if (key == "")
 694                         return;
 695
 696                 ctx_in = new AES();
 697                 ctx_out = new AES();
 698                 ServerInstance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 699                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 700                 keylength = key.length();
 701                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 702                 {
 703                         this->Instance->WriteOpers("*** \2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 704                         ServerInstance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 705                 }
 706                 else
 707                 {
 708                         this->Instance->WriteOpers("*** \2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 709                         ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 710                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 711                         ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 712                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 713                 }
 714         }
 715
 716         /* When an outbound connection finishes connecting, we receive
 717          * this event, and must send our SERVER string to the other
 718          * side. If the other side is happy, as outlined in the server
 719          * to server docs on the inspircd.org site, the other side
 720          * will then send back its own server string.
 721          */
 722         virtual bool OnConnected()
 723         {
 724                 if (this->LinkState == CONNECTING)
 725                 {
 726                         /* we do not need to change state here. */
 727                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 728                         {
 729                                 if (x->Name == this->myhost)
 730                                 {
 731                                         this->Instance->WriteOpers("*** Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 732                                         this->SendCapabilities();
 733                                         if (x->EncryptionKey != "")
 734                                         {
 735                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 736                                                 {
 737                                                         this->Instance->WriteOpers("\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 738                                                 }
 739                                                 else
 740                                                 {
 741                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 742                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 743                                                 }
 744                                         }
 745                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 746                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 747                                         return true;
 748                                 }
 749                         }
 750                 }
 751                 /* There is a (remote) chance that between the /CONNECT and the connection
 752                  * being accepted, some muppet has removed the <link> block and rehashed.
 753                  * If that happens the connection hangs here until it's closed. Unlikely
 754                  * and rather harmless.
 755                  */
 756                 this->Instance->WriteOpers("*** Connection to \2"+myhost+"\2 lost link tag(!)");
 757                 return true;
 758         }
 759
 760         virtual void OnError(InspSocketError e)
 761         {
 762                 /* We don't handle this method, because all our
 763                  * dirty work is done in OnClose() (see below)
 764                  * which is still called on error conditions too.
 765                  */
 766                 if (e == I_ERR_CONNECT)
 767                 {
 768                         this->Instance->WriteOpers("*** Connection failed: Connection refused");
 769                 }
 770         }
 771
 772         virtual int OnDisconnect()
 773         {
 774                 /* For the same reason as above, we don't
 775                  * handle OnDisconnect()
 776                  */
 777                 return true;
 778         }
 779
 780         /* Recursively send the server tree with distances as hops.
 781          * This is used during network burst to inform the other server
 782          * (and any of ITS servers too) of what servers we know about.
 783          * If at any point any of these servers already exist on the other
 784          * end, our connection may be terminated. The hopcounts given
 785          * by this function are relative, this doesn't matter so long as
 786          * they are all >1, as all the remote servers re-calculate them
 787          * to be relative too, with themselves as hop 0.
 788          */
 789         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 790         {
 791                 char command[1024];
 792                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 793                 {
 794                         TreeServer* recursive_server = Current->GetChild(q);
 795                         if (recursive_server != s)
 796                         {
 797                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 798                                 this->WriteLine(command);
 799                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 800                                 /* down to next level */
 801                                 this->SendServers(recursive_server, s, hops+1);
 802                         }
 803                 }
 804         }
 805
 806         std::string MyCapabilities()
 807         {
 808                 std::vector<std::string> modlist;
 809                 std::string capabilities = "";
 810
 811                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 812                 {
 813                         if ((this->Instance->modules[i]->GetVersion().Flags & VF_STATIC) || (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON))
 814                                 modlist.push_back(this->Instance->Config->module_names[i]);
 815                 }
 816                 sort(modlist.begin(),modlist.end());
 817                 for (unsigned int i = 0; i < modlist.size(); i++)
 818                 {
 819                         if (i)
 820                                 capabilities = capabilities + ",";
 821                         capabilities = capabilities + modlist[i];
 822                 }
 823                 return capabilities;
 824         }
 825
 826         void SendCapabilities()
 827         {
 828                 irc::commasepstream modulelist(MyCapabilities());
 829
 830                 this->WriteLine("CAPAB START");
 831
 832                 /* Send module names, split at 509 length */
 833                 std::string item = "*";
 834                 std::string line = "CAPAB MODULES ";
 835                 while ((item = modulelist.GetToken()) != "")
 836                 {
 837                         if (line.length() + item.length() + 1 > 509)
 838                         {
 839                                 this->WriteLine(line);
 840                                 line = "CAPAB MODULES ";
 841                         }
 842
 843                         if (line != "CAPAB MODULES ")
 844                                 line.append(",");
 845
 846                         line.append(item);
 847                 }
 848                 if (line != "CAPAB MODULES ")
 849                         this->WriteLine(line);
 850
 851                 int ip6 = 0;
 852                 int ip6support = 0;
 853 #ifdef IPV6
 854                 ip6 = 1;
 855 #endif
 856 #ifdef SUPPORT_IP6LINKS
 857                 ip6support = 1;
 858 #endif
 859                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support));
 860
 861                 this->WriteLine("CAPAB END");
 862         }
 863
 864         /* Check a comma seperated list for an item */
 865         bool HasItem(const std::string &list, const std::string &item)
 866         {
 867                 irc::commasepstream seplist(list);
 868
 869                 std::string item2 = "*";
 870                 while ((item2 = seplist.GetToken()) != "")
 871                 {
 872                         if (item2 == item)
 873                                 return true;
 874                 }
 875
 876                 return false;
 877         }
 878
 879         /* Isolate and return the elements that are different between two comma seperated lists */
 880         std::string ListDifference(const std::string &one, const std::string &two)
 881         {
 882                 irc::commasepstream list_one(one);
 883                 std::string item = "*";
 884                 std::string result = "";
 885                 while ((item = list_one.GetToken()) != "")
 886                 {
 887                         if (!HasItem(two, item))
 888                         {
 889                                 result.append(" ");
 890                                 result.append(item);
 891                         }
 892                 }
 893                 return result;
 894         }
 895
 896         bool Capab(std::deque<std::string> params)
 897         {
 898                 if (params.size() < 1)
 899                 {
 900                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 901                         return false;
 902                 }
 903
 904                 if (params[0] == "START")
 905                 {
 906                         this->ModuleList = "";
 907                         this->CapKeys.clear();
 908                 }
 909                 else if (params[0] == "END")
 910                 {
 911                         std::string reason = "";
 912                         int ip6support = 0;
 913 #ifdef SUPPORT_IP6LINKS
 914                         ip6support = 1;
 915 #endif
 916                         /* Compare ModuleList and check CapKeys...
 917                          * Maybe this could be tidier? -- Brain
 918                          */
 919                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 920                         {
 921                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 922                                 if (!diff.length())
 923                                 {
 924                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 925                                 }
 926                                 else
 927                                 {
 928                                         diff = "this server:" + diff;
 929                                 }
 930                                 if (diff.length() == 12)
 931                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 932                                 else
 933                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 934                         }
 935
 936                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 937                                 reason = "We don't both support linking to IPV6 servers";
 938
 939                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 940                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 941
 942                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 943                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 944
 945                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 946                                 reason = "We don't both have halfop support enabled/disabled identically";
 947
 948                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 949                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 950
 951                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 952                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 953
 954                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 955                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 956
 957                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 958                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 959
 960                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 961                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 962
 963                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 964                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 965
 966                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 967                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 968
 969                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 970                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 971
 972                         if (reason.length())
 973                         {
 974                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 975                                 return false;
 976                         }
 977                 }
 978                 else if ((params[0] == "MODULES") && (params.size() == 2))
 979                 {
 980                         if (!this->ModuleList.length())
 981                         {
 982                                 this->ModuleList.append(params[1]);
 983                         }
 984                         else
 985                         {
 986                                 this->ModuleList.append(",");
 987                                 this->ModuleList.append(params[1]);
 988                         }
 989                 }
 990                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
 991                 {
 992                         irc::tokenstream capabs(params[1]);
 993                         std::string item = "*";
 994                         while ((item = capabs.GetToken()) != "")
 995                         {
 996                                 /* Process each key/value pair */
 997                                 std::string::size_type equals = item.rfind('=');
 998                                 if (equals != std::string::npos)
 999                                 {
1000                                         std::string var = item.substr(0, equals);
1001                                         std::string value = item.substr(equals+1, item.length());
1002                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1003                                         CapKeys[var] = value;
1004                                 }
1005                         }
1006                 }
1007
1008                 return true;
1009         }
1010
1011         /* This function forces this server to quit, removing this server
1012          * and any users on it (and servers and users below that, etc etc).
1013          * It's very slow and pretty clunky, but luckily unless your network
1014          * is having a REAL bad hair day, this function shouldnt be called
1015          * too many times a month ;-)
1016          */
1017         void SquitServer(std::string &from, TreeServer* Current)
1018         {
1019                 /* recursively squit the servers attached to 'Current'.
1020                  * We're going backwards so we don't remove users
1021                  * while we still need them ;)
1022                  */
1023                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1024                 {
1025                         TreeServer* recursive_server = Current->GetChild(q);
1026                         this->SquitServer(from,recursive_server);
1027                 }
1028                 /* Now we've whacked the kids, whack self */
1029                 num_lost_servers++;
1030                 num_lost_users += Current->QuitUsers(from);
1031         }
1032
1033         /* This is a wrapper function for SquitServer above, which
1034          * does some validation first and passes on the SQUIT to all
1035          * other remaining servers.
1036          */
1037         void Squit(TreeServer* Current,std::string reason)
1038         {
1039                 if ((Current) && (Current != TreeRoot))
1040                 {
1041                         std::deque<std::string> params;
1042                         params.push_back(Current->GetName());
1043                         params.push_back(":"+reason);
1044                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1045                         if (Current->GetParent() == TreeRoot)
1046                         {
1047                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1048                         }
1049                         else
1050                         {
1051                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1052                         }
1053                         num_lost_servers = 0;
1054                         num_lost_users = 0;
1055                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1056                         SquitServer(from, Current);
1057                         Current->Tidy();
1058                         Current->GetParent()->DelChild(Current);
1059                         DELETE(Current);
1060                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1061                 }
1062                 else
1063                 {
1064                         ServerInstance->Log(DEFAULT,"Squit from unknown server");
1065                 }
1066         }
1067
1068         /* FMODE command - server mode with timestamp checks */
1069         bool ForceMode(std::string source, std::deque<std::string> &params)
1070         {
1071                 /* Chances are this is a 1.0 FMODE without TS */
1072                 if (params.size() < 3)
1073                 {
1074                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1075                         return false;
1076                 }
1077
1078                 bool smode = false;
1079                 std::string sourceserv;
1080
1081                 /* Are we dealing with an FMODE from a user, or from a server? */
1082                 userrec* who = this->Instance->FindNick(source);
1083                 if (who)
1084                 {
1085                         /* FMODE from a user, set sourceserv to the users server name */
1086                         sourceserv = who->server;
1087                 }
1088                 else
1089                 {
1090                         /* FMODE from a server, create a fake user to receive mode feedback */
1091                         who = new userrec(this->Instance);
1092                         who->SetFd(FD_MAGIC_NUMBER);
1093                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1094                         sourceserv = source;    /* Set sourceserv to the actual source string */
1095                 }
1096                 const char* modelist[64];
1097                 time_t TS = 0;
1098                 int n = 0;
1099                 memset(&modelist,0,sizeof(modelist));
1100                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1101                 {
1102                         if (q == 1)
1103                         {
1104                                 /* The timestamp is in this position.
1105                                  * We don't want to pass that up to the
1106                                  * server->client protocol!
1107                                  */
1108                                 TS = atoi(params[q].c_str());
1109                         }
1110                         else
1111                         {
1112                                 /* Everything else is fine to append to the modelist */
1113                                 modelist[n++] = params[q].c_str();
1114                         }
1115
1116                 }
1117                 /* Extract the TS value of the object, either userrec or chanrec */
1118                 userrec* dst = this->Instance->FindNick(params[0]);
1119                 chanrec* chan = NULL;
1120                 time_t ourTS = 0;
1121                 if (dst)
1122                 {
1123                         ourTS = dst->age;
1124                 }
1125                 else
1126                 {
1127                         chan = this->Instance->FindChan(params[0]);
1128                         if (chan)
1129                         {
1130                                 ourTS = chan->age;
1131                         }
1132                 }
1133
1134                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1135                  * with parameters.
1136                  */
1137                 if (TS == ourTS)
1138                 {
1139                         ServerInstance->Log(DEBUG,"Entering TS equality check");
1140                         ModeHandler* mh = NULL;
1141                         unsigned long paramptr = 3;
1142                         std::string to_bounce = "";
1143                         std::string to_keep = "";
1144                         std::vector<std::string> params_to_keep;
1145                         std::string params_to_bounce = "";
1146                         bool adding = true;
1147                         char cur_change = 1;
1148                         char old_change = 0;
1149                         char old_bounce_change = 0;
1150                         /* Merge modes, basically do special stuff to mode with params */
1151                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1152                         {
1153                                 switch (*x)
1154                                 {
1155                                         case '-':
1156                                                 adding = false;
1157                                         break;
1158                                         case '+':
1159                                                 adding = true;
1160                                         break;
1161                                         default:
1162                                                 if (adding)
1163                                                 {
1164                                                         /* We only care about whats being set,
1165                                                          * not whats being unset
1166                                                          */
1167                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1168
1169                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1170                                                         {
1171                                                                 /* We only want to do special things to
1172                                                                  * modes with parameters, we are going to rewrite
1173                                                                  * those parameters
1174                                                                  */
1175                                                                 ModePair ret;
1176                                                                 adding ? cur_change = '+' : cur_change = '-';
1177
1178                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1179
1180                                                                 /* The mode is set here, check which we should keep */
1181                                                                 if (ret.first)
1182                                                                 {
1183                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1184
1185                                                                         if (which_to_keep == true)
1186                                                                         {
1187                                                                                 /* Keep ours, bounce theirs:
1188                                                                                  * Send back ours to them and
1189                                                                                  * drop their mode changs
1190                                                                                  */
1191                                                                                 adding ? cur_change = '+' : cur_change = '-';
1192                                                                                 if (cur_change != old_bounce_change)
1193                                                                                         to_bounce += cur_change;
1194                                                                                 to_bounce += *x;
1195                                                                                 old_bounce_change = cur_change;
1196
1197                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1198                                                                                         params_to_bounce.append(" ").append(ret.second);
1199                                                                         }
1200                                                                         else
1201                                                                         {
1202                                                                                 /* Keep theirs: Accept their mode change,
1203                                                                                  * do nothing else
1204                                                                                  */
1205                                                                                 adding ? cur_change = '+' : cur_change = '-';
1206                                                                                 if (cur_change != old_change)
1207                                                                                         to_keep += cur_change;
1208                                                                                 to_keep += *x;
1209                                                                                 old_change = cur_change;
1210
1211                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1212                                                                                         params_to_keep.push_back(params[paramptr]);
1213                                                                         }
1214                                                                 }
1215                                                                 else
1216                                                                 {
1217                                                                         /* Mode isnt set here, we want it */
1218                                                                         adding ? cur_change = '+' : cur_change = '-';
1219                                                                         if (cur_change != old_change)
1220                                                                                 to_keep += cur_change;
1221                                                                         to_keep += *x;
1222                                                                         old_change = cur_change;
1223
1224                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1225                                                                                 params_to_keep.push_back(params[paramptr]);
1226                                                                 }
1227
1228                                                                 paramptr++;
1229                                                         }
1230                                                         else
1231                                                         {
1232                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1233
1234                                                                 if (mh)
1235                                                                 {
1236                                                                         adding ? cur_change = '+' : cur_change = '-';
1237
1238                                                                         /* Just keep this, safe to merge with no checks
1239                                                                          * it has no parameters
1240                                                                          */
1241
1242                                                                         if (cur_change != old_change)
1243                                                                                 to_keep += cur_change;
1244                                                                         to_keep += *x;
1245                                                                         old_change = cur_change;
1246
1247                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1248                                                                         {
1249                                                                                 ServerInstance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1250                                                                                 params_to_keep.push_back(params[paramptr++]);
1251                                                                         }
1252                                                                 }
1253                                                         }
1254                                                 }
1255                                                 else
1256                                                 {
1257                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1258
1259                                                         if (mh)
1260                                                         {
1261                                                                 /* Taking a mode away */
1262                                                                 adding ? cur_change = '+' : cur_change = '-';
1263
1264                                                                 if (cur_change != old_change)
1265                                                                         to_keep += cur_change;
1266                                                                 to_keep += *x;
1267                                                                 old_change = cur_change;
1268
1269                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1270                                                                         params_to_keep.push_back(params[paramptr++]);
1271                                                         }
1272                                                 }
1273                                         break;
1274                                 }
1275                         }
1276
1277                         if (to_bounce.length())
1278                         {
1279                                 std::deque<std::string> newparams;
1280                                 newparams.push_back(params[0]);
1281                                 newparams.push_back(ConvToStr(ourTS));
1282                                 newparams.push_back(to_bounce+params_to_bounce);
1283                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1284                         }
1285
1286                         if (to_keep.length())
1287                         {
1288                                 unsigned int n = 2;
1289                                 unsigned int q = 0;
1290                                 modelist[0] = params[0].c_str();
1291                                 modelist[1] = to_keep.c_str();
1292
1293                                 if (params_to_keep.size() > 2)
1294                                 {
1295                                         for (q = 2; (q < params_to_keep.size()) && (q < 64); q++)
1296                                         {
1297                                                 ServerInstance->Log(DEBUG,"Item %d of %d", q, params_to_keep.size());
1298                                                 modelist[n++] = params_to_keep[q].c_str();
1299                                         }
1300                                 }
1301
1302                                 if (smode)
1303                                 {
1304                                         ServerInstance->Log(DEBUG,"Send mode");
1305                                         this->Instance->SendMode(modelist, n+2, who);
1306                                 }
1307                                 else
1308                                 {
1309                                         ServerInstance->Log(DEBUG,"Send mode client");
1310                                         this->Instance->CallCommandHandler("MODE", modelist, n+2, who);
1311                                 }
1312
1313                                 /* HOT POTATO! PASS IT ON! */
1314                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1315                         }
1316                 }
1317                 else
1318                 /* U-lined servers always win regardless of their TS */
1319                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1320                 {
1321                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1322                          * SHOULD accept it, if its clock is right.
1323                          *
1324                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1325                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1326                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1327                          *
1328                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1329                          * writing the code. It took me a while to come up with this solution.
1330                          *
1331                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1332                          */
1333
1334                         std::deque<std::string> newparams;      /* New parameter list we send back */
1335                         newparams.push_back(params[0]);         /* Target, user or channel */
1336                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1337                         newparams.push_back("");                /* This contains the mode string. For now
1338                                                                  * it's empty, we fill it below.
1339                                                                  */
1340
1341                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1342                          * set to avoid a desync here.
1343                          */
1344                         std::string modebounce = "";
1345                         bool adding = true;
1346                         unsigned int t = 3;
1347                         ModeHandler* mh = NULL;
1348                         char cur_change = 1;
1349                         char old_change = 0;
1350                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1351                         {
1352                                 /* Iterate over all mode chars in the sent set */
1353                                 switch (*x)
1354                                 {
1355                                         /* Adding or subtracting modes? */
1356                                         case '-':
1357                                                 adding = false;
1358                                         break;
1359                                         case '+':
1360                                                 adding = true;
1361                                         break;
1362                                         default:
1363                                                 /* Find the mode handler for this mode */
1364                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1365
1366                                                 /* Got a mode handler?
1367                                                  * This also prevents us bouncing modes we have no handler for.
1368                                                  */
1369                                                 if (mh)
1370                                                 {
1371                                                         ModePair ret;
1372                                                         std::string p = "";
1373
1374                                                         /* Does the mode require a parameter right now?
1375                                                          * If it does, fetch it if we can
1376                                                          */
1377                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1378                                                                 p = params[t++];
1379
1380                                                         /* Call the ModeSet method to determine if its set with the
1381                                                          * given parameter here or not.
1382                                                          */
1383                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1384
1385                                                         /* XXX: Really. Dont ask.
1386                                                          * Determine from if its set combined with what the current
1387                                                          * 'state' is (adding or not) as to wether we should 'invert'
1388                                                          * or 'reinforce' the mode change
1389                                                          */
1390                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1391
1392                                                         /* Quickly determine if we have 'flipped' from + to -,
1393                                                          * or - to +, to prevent unneccessary +/- chars in the
1394                                                          * output string that waste bandwidth
1395                                                          */
1396                                                         if (cur_change != old_change)
1397                                                                 modebounce += cur_change;
1398                                                         old_change = cur_change;
1399
1400                                                         /* Add the mode character to the output string */
1401                                                         modebounce += mh->GetModeChar();
1402
1403                                                         /* We got a parameter back from ModeHandler::ModeSet,
1404                                                          * are we supposed to be sending one out right now?
1405                                                          */
1406                                                         if (ret.second.length())
1407                                                         {
1408                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1409                                                                         /* Yes we're supposed to be sending out
1410                                                                          * the parameter. Make sure it goes
1411                                                                          */
1412                                                                         newparams.push_back(ret.second);
1413                                                         }
1414
1415                                                 }
1416                                         break;
1417                                 }
1418                         }
1419
1420                         /* Update the parameters for FMODE with the new 'bounced' string */
1421                         newparams[2] = modebounce;
1422                         /* Only send it back the way it came, no need to send it anywhere else */
1423                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1424                         ServerInstance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1425                 }
1426                 else
1427                 {
1428                         ServerInstance->Log(DEBUG,"Allow modes, TS lower for sender");
1429                         /* The server was ulined, but something iffy is up with the TS.
1430                          * Sound the alarm bells!
1431                          */
1432                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1433                         {
1434                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1435                         }
1436                         /* Allow the mode, route it to either server or user command handling */
1437                         if (smode)
1438                                 this->Instance->SendMode(modelist,n,who);
1439                         else
1440                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1441
1442                         /* HOT POTATO! PASS IT ON! */
1443                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1444                 }
1445                 /* Are we supposed to free the userrec? */
1446                 if (smode)
1447                         DELETE(who);
1448
1449                 return true;
1450         }
1451
1452         /* FTOPIC command */
1453         bool ForceTopic(std::string source, std::deque<std::string> &params)
1454         {
1455                 if (params.size() != 4)
1456                         return true;
1457                 time_t ts = atoi(params[1].c_str());
1458                 std::string nsource = source;
1459
1460                 chanrec* c = this->Instance->FindChan(params[0]);
1461                 if (c)
1462                 {
1463                         if ((ts >= c->topicset) || (!*c->topic))
1464                         {
1465                                 std::string oldtopic = c->topic;
1466                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1467                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1468                                 c->topicset = ts;
1469                                 /* if the topic text is the same as the current topic,
1470                                  * dont bother to send the TOPIC command out, just silently
1471                                  * update the set time and set nick.
1472                                  */
1473                                 if (oldtopic != params[3])
1474                                 {
1475                                         userrec* user = this->Instance->FindNick(source);
1476                                         if (!user)
1477                                         {
1478                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1479                                         }
1480                                         else
1481                                         {
1482                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1483                                                 nsource = user->server;
1484                                         }
1485                                         /* all done, send it on its way */
1486                                         params[3] = ":" + params[3];
1487                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1488                                 }
1489                         }
1490
1491                 }
1492
1493                 return true;
1494         }
1495
1496         /* FJOIN, similar to unreal SJOIN */
1497         bool ForceJoin(std::string source, std::deque<std::string> &params)
1498         {
1499                 if (params.size() < 3)
1500                         return true;
1501
1502                 char first[MAXBUF];
1503                 char modestring[MAXBUF];
1504                 char* mode_users[127];
1505                 memset(&mode_users,0,sizeof(mode_users));
1506                 mode_users[0] = first;
1507                 mode_users[1] = modestring;
1508                 strcpy(modestring,"+");
1509                 unsigned int modectr = 2;
1510
1511                 userrec* who = NULL;
1512                 std::string channel = params[0];
1513                 time_t TS = atoi(params[1].c_str());
1514                 char* key = "";
1515
1516                 chanrec* chan = this->Instance->FindChan(channel);
1517                 if (chan)
1518                 {
1519                         key = chan->key;
1520                 }
1521                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1522
1523                 /* default is a high value, which if we dont have this
1524                  * channel will let the other side apply their modes.
1525                  */
1526                 time_t ourTS = time(NULL)+600;
1527                 chanrec* us = this->Instance->FindChan(channel);
1528                 if (us)
1529                 {
1530                         ourTS = us->age;
1531                 }
1532
1533                 ServerInstance->Log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1534
1535                 irc::tokenstream users(params[2]);
1536                 std::string item = "*";
1537
1538                 /* do this first, so our mode reversals are correctly received by other servers
1539                  * if there is a TS collision.
1540                  */
1541                 params[2] = ":" + params[2];
1542                 DoOneToAllButSender(source,"FJOIN",params,source);
1543                 while (item != "")
1544                 {
1545                         item = users.GetToken();
1546                         /* process one user at a time, applying modes. */
1547                         char* usr = (char*)item.c_str();
1548                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1549                          * (is this even possible?) */
1550                         if (usr && *usr)
1551                         {
1552                                 char* permissions = usr;
1553                                 int ntimes = 0;
1554                                 while ((*permissions) && (*permissions != ','))
1555                                 {
1556                                         ModeHandler* mh = ServerInstance->Modes->FindPrefix(*permissions);
1557                                         if (mh)
1558                                         {
1559                                                 ntimes++;
1560                                                 charlcat(modestring,mh->GetModeChar(),MAXBUF);
1561                                         }
1562                                         else
1563                                         {
1564                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",mh->GetPrefix());
1565                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+mh->GetModeChar()+"' in FJOIN");
1566                                                 return false;
1567                                         }
1568                                         usr++;
1569                                         permissions++;
1570                                 }
1571                                 usr++;
1572
1573                                 /* Did they get any modes? How many times? */
1574                                 for (int k = 0; k < ntimes; k++)
1575                                         mode_users[modectr++] = strdup(usr); // XXX
1576
1577                                 who = this->Instance->FindNick(usr);
1578                                 if (who)
1579                                 {
1580                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, key);
1581                                         if (modectr >= (MAXMODES-1))
1582                                         {
1583                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1584                                                  * if there are more than MAXMODES to go.
1585                                                  */
1586                                                 if ((ourTS >= TS) || (this->Instance->ULine(who->server)))
1587                                                 {
1588                                                         /* We also always let u-lined clients win, no matter what the TS value */
1589                                                         ServerInstance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1590                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1591                                                         if (ourTS != TS)
1592                                                         {
1593                                                                 ServerInstance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1594                                                                 us->age = TS;
1595                                                                 ourTS = TS;
1596                                                         }
1597                                                 }
1598                                                 else
1599                                                 {
1600                                                         ServerInstance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1601                                                         /* bouncy bouncy! */
1602                                                         std::deque<std::string> params;
1603                                                         /* modes are now being UNSET... */
1604                                                         *mode_users[1] = '-';
1605                                                         for (unsigned int x = 0; x < modectr; x++)
1606                                                         {
1607                                                                 if (x == 1)
1608                                                                 {
1609                                                                         params.push_back(ConvToStr(us->age));
1610                                                                 }
1611                                                                 params.push_back(mode_users[x]);
1612
1613                                                         }
1614                                                         // tell everyone to bounce the modes. bad modes, bad!
1615                                                         DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1616                                                 }
1617                                                 strcpy(mode_users[1],"+");
1618                                                 for (unsigned int f = 2; f < modectr; f++)
1619                                                         free(mode_users[f]);
1620                                                 modectr = 2;
1621                                         }
1622                                 }
1623                                 else
1624                                 {
1625                                         for (unsigned int f = 2; f < modectr; f++)
1626                                                 free(mode_users[f]);
1627
1628                                         this->WriteLine("ERROR :Invalid user '"+std::string(usr)+"' in FJOIN to '"+channel+"'");
1629                                         return false;
1630                                 }
1631                         }
1632                 }
1633                 /* there werent enough modes built up to flush it during FJOIN,
1634                  * or, there are a number left over. flush them out.
1635                  */
1636                 if ((modectr > 2) && (who) && (us))
1637                 {
1638                         if (ourTS >= TS)
1639                         {
1640                                 ServerInstance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1641                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1642                                 if (ourTS != TS)
1643                                 {
1644                                         ServerInstance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1645                                         us->age = TS;
1646                                         ourTS = TS;
1647                                 }
1648                         }
1649                         else
1650                         {
1651                                 ServerInstance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1652                                 std::deque<std::string> params;
1653                                 *mode_users[1] = '-';
1654                                 for (unsigned int x = 0; x < modectr; x++)
1655                                 {
1656                                         if (x == 1)
1657                                         {
1658                                                 params.push_back(ConvToStr(us->age));
1659                                         }
1660                                         params.push_back(mode_users[x]);
1661                                 }
1662                                 DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1663                         }
1664
1665                         for (unsigned int f = 2; f < modectr; f++)
1666                                 free(mode_users[f]);
1667                 }
1668                 return true;
1669         }
1670
1671         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1672         {
1673                 if (params.size() >= 2)
1674                 {
1675                         chanrec* c = this->Instance->FindChan(params[0]);
1676                         if (c)
1677                         {
1678                                 time_t theirTS = atoi(params[1].c_str());
1679                                 time_t ourTS = c->age;
1680                                 if (ourTS >= theirTS)
1681                                 {
1682                                         ServerInstance->Log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1683                                         c->age = theirTS;
1684                                 }
1685                         }
1686                 }
1687                 DoOneToAllButSender(this->Instance->Config->ServerName,"SYNCTS",params,source);
1688                 return true;
1689         }
1690
1691         /* NICK command */
1692         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1693         {
1694                 if (params.size() < 8)
1695                         return true;
1696                 if (params.size() > 8)
1697                 {
1698                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1699                         return true;
1700                 }
1701                 // NICK age nick host dhost ident +modes ip :gecos
1702                 //       0    1   2     3     4      5   6     7
1703                 time_t age = atoi(params[0].c_str());
1704
1705                 /* This used to have a pretty craq'y loop doing the same thing,
1706                  * now we just let the STL do the hard work (more efficiently)
1707                  */
1708                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1709
1710                 const char* tempnick = params[1].c_str();
1711                 ServerInstance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1712
1713                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1714
1715                 if (iter != this->Instance->clientlist.end())
1716                 {
1717                         // nick collision
1718                         ServerInstance->Log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1719                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1720                         return true;
1721                 }
1722
1723                 userrec* _new = new userrec(this->Instance);
1724                 this->Instance->clientlist[tempnick] = _new;
1725                 _new->SetFd(FD_MAGIC_NUMBER);
1726                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1727                 strlcpy(_new->host, params[2].c_str(),63);
1728                 strlcpy(_new->dhost, params[3].c_str(),63);
1729                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1730                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1731                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1732                 _new->registered = REG_ALL;
1733                 _new->signon = age;
1734
1735                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1736                         _new->modes[(*v)-65] = 1;
1737
1738                 if (params[6].find_first_of(":") != std::string::npos)
1739                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1740                 else
1741                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1742
1743                 this->Instance->WriteOpers("*** Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1744
1745                 params[7] = ":" + params[7];
1746                 DoOneToAllButSender(source,"NICK",params,source);
1747
1748                 // Increment the Source Servers User Count..
1749                 TreeServer* SourceServer = FindServer(source);
1750                 if (SourceServer)
1751                 {
1752                         ServerInstance->Log(DEBUG,"Found source server of %s",_new->nick);
1753                         SourceServer->AddUserCount();
1754                 }
1755
1756                 return true;
1757         }
1758
1759         /* Send one or more FJOINs for a channel of users.
1760          * If the length of a single line is more than 480-NICKMAX
1761          * in length, it is split over multiple lines.
1762          */
1763         void SendFJoins(TreeServer* Current, chanrec* c)
1764         {
1765                 ServerInstance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1766                 char list[MAXBUF];
1767                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1768
1769                 size_t dlen, curlen;
1770                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1771                 int numusers = 0;
1772                 char* ptr = list + dlen;
1773
1774                 CUList *ulist = c->GetUsers();
1775                 std::vector<userrec*> specific_halfop;
1776                 std::vector<userrec*> specific_voice;
1777                 std::string modes = "";
1778                 std::string params = "";
1779
1780                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1781                 {
1782                         // The first parameter gets a : before it
1783                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1784
1785                         curlen += ptrlen;
1786                         ptr += ptrlen;
1787
1788                         numusers++;
1789
1790                         if (curlen > (480-NICKMAX))
1791                         {
1792                                 this->WriteLine(list);
1793                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1794                                 ptr = list + dlen;
1795                                 ptrlen = 0;
1796                                 numusers = 0;
1797                         }
1798                 }
1799
1800                 if (numusers)
1801                         this->WriteLine(list);
1802
1803                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1804                 {
1805                         modes.append("b");
1806                         params.append(b->data).append(" ");
1807                 }
1808                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1809         }
1810
1811         /* Send G, Q, Z and E lines */
1812         void SendXLines(TreeServer* Current)
1813         {
1814                 char data[MAXBUF];
1815                 std::string n = this->Instance->Config->ServerName;
1816                 const char* sn = n.c_str();
1817                 int iterations = 0;
1818                 /* Yes, these arent too nice looking, but they get the job done */
1819                 for (std::vector<ZLine>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1820                 {
1821                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,i->ipaddr,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1822                         this->WriteLine(data);
1823                 }
1824                 for (std::vector<QLine>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1825                 {
1826                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,i->nick,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1827                         this->WriteLine(data);
1828                 }
1829                 for (std::vector<GLine>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1830                 {
1831                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1832                         this->WriteLine(data);
1833                 }
1834                 for (std::vector<ELine>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1835                 {
1836                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1837                         this->WriteLine(data);
1838                 }
1839                 for (std::vector<ZLine>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1840                 {
1841                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,i->ipaddr,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1842                         this->WriteLine(data);
1843                 }
1844                 for (std::vector<QLine>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1845                 {
1846                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,i->nick,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1847                         this->WriteLine(data);
1848                 }
1849                 for (std::vector<GLine>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1850                 {
1851                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1852                         this->WriteLine(data);
1853                 }
1854                 for (std::vector<ELine>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1855                 {
1856                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1857                         this->WriteLine(data);
1858                 }
1859         }
1860
1861         /* Send channel modes and topics */
1862         void SendChannelModes(TreeServer* Current)
1863         {
1864                 char data[MAXBUF];
1865                 std::deque<std::string> list;
1866                 int iterations = 0;
1867                 std::string n = this->Instance->Config->ServerName;
1868                 const char* sn = n.c_str();
1869                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1870                 {
1871                         SendFJoins(Current, c->second);
1872                         if (*c->second->topic)
1873                         {
1874                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1875                                 this->WriteLine(data);
1876                         }
1877                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1878                         list.clear();
1879                         c->second->GetExtList(list);
1880                         for (unsigned int j = 0; j < list.size(); j++)
1881                         {
1882                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1883                         }
1884                 }
1885         }
1886
1887         /* send all users and their oper state/modes */
1888         void SendUsers(TreeServer* Current)
1889         {
1890                 char data[MAXBUF];
1891                 std::deque<std::string> list;
1892                 int iterations = 0;
1893                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1894                 {
1895                         if (u->second->registered == REG_ALL)
1896                         {
1897                                 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
1898                                 this->WriteLine(data);
1899                                 if (*u->second->oper)
1900                                 {
1901                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1902                                 }
1903                                 if (*u->second->awaymsg)
1904                                 {
1905                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1906                                 }
1907                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1908                                 list.clear();
1909                                 u->second->GetExtList(list);
1910                                 for (unsigned int j = 0; j < list.size(); j++)
1911                                 {
1912                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1913                                 }
1914                         }
1915                 }
1916         }
1917
1918         /* This function is called when we want to send a netburst to a local
1919          * server. There is a set order we must do this, because for example
1920          * users require their servers to exist, and channels require their
1921          * users to exist. You get the idea.
1922          */
1923         void DoBurst(TreeServer* s)
1924         {
1925                 std::string burst = "BURST "+ConvToStr(time(NULL));
1926                 std::string endburst = "ENDBURST";
1927                 // Because by the end of the netburst, it  could be gone!
1928                 std::string name = s->GetName();
1929                 this->Instance->WriteOpers("*** Bursting to \2"+name+"\2.");
1930                 this->WriteLine(burst);
1931                 /* send our version string */
1932                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1933                 /* Send server tree */
1934                 this->SendServers(TreeRoot,s,1);
1935                 /* Send users and their oper status */
1936                 this->SendUsers(s);
1937                 /* Send everything else (channel modes, xlines etc) */
1938                 this->SendChannelModes(s);
1939                 this->SendXLines(s);
1940                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1941                 this->WriteLine(endburst);
1942                 this->Instance->WriteOpers("*** Finished bursting to \2"+name+"\2.");
1943         }
1944
1945         /* This function is called when we receive data from a remote
1946          * server. We buffer the data in a std::string (it doesnt stay
1947          * there for long), reading using InspSocket::Read() which can
1948          * read up to 16 kilobytes in one operation.
1949          *
1950          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1951          * THE SOCKET OBJECT FOR US.
1952          */
1953         virtual bool OnDataReady()
1954         {
1955                 char* data = this->Read();
1956                 /* Check that the data read is a valid pointer and it has some content */
1957                 if (data && *data)
1958                 {
1959                         this->in_buffer.append(data);
1960                         /* While there is at least one new line in the buffer,
1961                          * do something useful (we hope!) with it.
1962                          */
1963                         while (in_buffer.find("\n") != std::string::npos)
1964                         {
1965                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1966                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1967                                 if (ret.find("\r") != std::string::npos)
1968                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1969                                 /* Process this one, abort if it
1970                                  * didnt return true.
1971                                  */
1972                                 if (this->ctx_in)
1973                                 {
1974                                         char out[1024];
1975                                         char result[1024];
1976                                         memset(result,0,1024);
1977                                         memset(out,0,1024);
1978                                         ServerInstance->Log(DEBUG,"Original string '%s'",ret.c_str());
1979                                         /* ERROR + CAPAB is still allowed unencryped */
1980                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1981                                         {
1982                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1983                                                 if ((nbytes > 0) && (nbytes < 1024))
1984                                                 {
1985                                                         ServerInstance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1986                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1987                                                         for (int t = 0; t < nbytes; t++)
1988                                                                 if (result[t] == '\7') result[t] = 0;
1989                                                         ret = result;
1990                                                 }
1991                                         }
1992                                 }
1993                                 if (!this->ProcessLine(ret))
1994                                 {
1995                                         ServerInstance->Log(DEBUG,"ProcessLine says no!");
1996                                         return false;
1997                                 }
1998                         }
1999                         return true;
2000                 }
2001                 /* EAGAIN returns an empty but non-NULL string, so this
2002                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2003                  */
2004                 return (data && !*data);
2005         }
2006
2007         int WriteLine(std::string line)
2008         {
2009                 ServerInstance->Log(DEBUG,"OUT: %s",line.c_str());
2010                 if (this->ctx_out)
2011                 {
2012                         char result[10240];
2013                         char result64[10240];
2014                         if (this->keylength)
2015                         {
2016                                 // pad it to the key length
2017                                 int n = this->keylength - (line.length() % this->keylength);
2018                                 if (n)
2019                                 {
2020                                         ServerInstance->Log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);
2021                                         line.append(n,'\7');
2022                                 }
2023                         }
2024                         unsigned int ll = line.length();
2025                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2026                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2027                         line = result64;
2028                         //int from64tobits(char *out, const char *in, int maxlen);
2029                 }
2030                 return this->Write(line + "\r\n");
2031         }
2032
2033         /* Handle ERROR command */
2034         bool Error(std::deque<std::string> &params)
2035         {
2036                 if (params.size() < 1)
2037                         return false;
2038                 this->Instance->WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2039                 /* we will return false to cause the socket to close. */
2040                 return false;
2041         }
2042
2043         /* remote MOTD. leet, huh? */
2044         bool Motd(std::string prefix, std::deque<std::string> &params)
2045         {
2046                 /* Get the reply to a STATS query if it matches this servername,
2047                  * and send it back as a load of PUSH queries
2048                  */
2049                 if (params.size() > 0)
2050                 {
2051                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2052                         {
2053                                 /* It's for our server */
2054                                 string_list results;
2055                                 userrec* source = this->Instance->FindNick(prefix);
2056
2057                                 if (source)
2058                                 {
2059                                         std::deque<std::string> par;
2060                                         par.push_back(prefix);
2061                                         par.push_back("");
2062
2063                                         if (!ServerInstance->Config->MOTD.size())
2064                                         {
2065                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2066                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2067                                                 return true;
2068                                         }
2069
2070                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 375 "+source->nick+" :"+ServerInstance->Config->ServerName+" message of the day";
2071                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2072
2073                                         for (unsigned int i = 0; i < ServerInstance->Config->MOTD.size(); i++)
2074                                         {
2075                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 372 "+source->nick+" :- "+ServerInstance->Config->MOTD[i];
2076                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2077                                         }
2078
2079                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2080                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2081                                 }
2082                         }
2083                         else
2084                         {
2085                                 /* Pass it on */
2086                                 userrec* source = this->Instance->FindNick(prefix);
2087                                 if (source)
2088                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2089                         }
2090                 }
2091                 return true;
2092         }
2093
2094         bool Stats(std::string prefix, std::deque<std::string> &params)
2095         {
2096                 /* Get the reply to a STATS query if it matches this servername,
2097                  * and send it back as a load of PUSH queries
2098                  */
2099                 if (params.size() > 1)
2100                 {
2101                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2102                         {
2103                                 /* It's for our server */
2104                                 string_list results;
2105                                 userrec* source = this->Instance->FindNick(prefix);
2106                                 if (source)
2107                                 {
2108                                         std::deque<std::string> par;
2109                                         par.push_back(prefix);
2110                                         par.push_back("");
2111                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2112                                         for (size_t i = 0; i < results.size(); i++)
2113                                         {
2114                                                 par[1] = "::" + results[i];
2115                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2116                                         }
2117                                 }
2118                         }
2119                         else
2120                         {
2121                                 /* Pass it on */
2122                                 userrec* source = this->Instance->FindNick(prefix);
2123                                 if (source)
2124                                         DoOneToOne(prefix, "STATS", params, params[1]);
2125                         }
2126                 }
2127                 return true;
2128         }
2129
2130
2131         /* Because the core won't let users or even SERVERS set +o,
2132          * we use the OPERTYPE command to do this.
2133          */
2134         bool OperType(std::string prefix, std::deque<std::string> &params)
2135         {
2136                 if (params.size() != 1)
2137                 {
2138                         ServerInstance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2139                         return true;
2140                 }
2141                 std::string opertype = params[0];
2142                 userrec* u = this->Instance->FindNick(prefix);
2143                 if (u)
2144                 {
2145                         u->modes[UM_OPERATOR] = 1;
2146                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2147                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2148                 }
2149                 return true;
2150         }
2151
2152         /* Because Andy insists that services-compatible servers must
2153          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2154          */
2155         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2156         {
2157                 if (params.size() < 3)
2158                         return true;
2159
2160                 userrec* u = this->Instance->FindNick(params[0]);
2161
2162                 if (u)
2163                 {
2164                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2165                         if (IS_LOCAL(u))
2166                         {
2167                                 std::deque<std::string> par;
2168                                 par.push_back(params[1]);
2169                                 /* This is not required as one is sent in OnUserPostNick below
2170                                  */
2171                                 //DoOneToMany(u->nick,"NICK",par);
2172                                 if (!u->ForceNickChange(params[1].c_str()))
2173                                 {
2174                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2175                                         return true;
2176                                 }
2177                                 u->age = atoi(params[2].c_str());
2178                         }
2179                 }
2180                 return true;
2181         }
2182
2183         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2184         {
2185                 if (params.size() < 2)
2186                         return true;
2187
2188                 userrec* u = this->Instance->FindNick(params[0]);
2189
2190                 if (u)
2191                 {
2192                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2193                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2194                 }
2195                 return true;
2196         }
2197
2198         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2199         {
2200                 if (params.size() < 1)
2201                         return false;
2202
2203                 std::string servermask = params[0];
2204
2205                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2206                 {
2207                         this->Instance->WriteOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
2208                         this->Instance->RehashServer();
2209                         ReadConfiguration(false);
2210                 }
2211                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2212                 return true;
2213         }
2214
2215         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2216         {
2217                 if (params.size() != 2)
2218                         return true;
2219
2220                 std::string nick = params[0];
2221                 userrec* u = this->Instance->FindNick(prefix);
2222                 userrec* who = this->Instance->FindNick(nick);
2223
2224                 if (who)
2225                 {
2226                         /* Prepend kill source, if we don't have one */
2227                         std::string sourceserv = prefix;
2228                         if (u)
2229                         {
2230                                 sourceserv = u->server;
2231                         }
2232                         if (*(params[1].c_str()) != '[')
2233                         {
2234                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2235                         }
2236                         std::string reason = params[1];
2237                         params[1] = ":" + params[1];
2238                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2239                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2240                         userrec::QuitUser(this->Instance,who,reason);
2241                 }
2242                 return true;
2243         }
2244
2245         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2246         {
2247                 if (params.size() < 1)
2248                         return true;
2249
2250                 if (params.size() == 1)
2251                 {
2252                         TreeServer* ServerSource = FindServer(prefix);
2253                         if (ServerSource)
2254                         {
2255                                 ServerSource->SetPingFlag();
2256                         }
2257                 }
2258                 else
2259                 {
2260                         std::string forwardto = params[1];
2261                         if (forwardto == this->Instance->Config->ServerName)
2262                         {
2263                                 /*
2264                                  * this is a PONG for us
2265                                  * if the prefix is a user, check theyre local, and if they are,
2266                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2267                                  * Services might want to send these s->s, but we dont need to yet.
2268                                  */
2269                                 userrec* u = this->Instance->FindNick(prefix);
2270
2271                                 if (u)
2272                                 {
2273                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2274                                 }
2275                         }
2276                         else
2277                         {
2278                                 // not for us, pass it on :)
2279                                 DoOneToOne(prefix,"PONG",params,forwardto);
2280                         }
2281                 }
2282
2283                 return true;
2284         }
2285
2286         bool MetaData(std::string prefix, std::deque<std::string> &params)
2287         {
2288                 if (params.size() < 3)
2289                         return true;
2290
2291                 TreeServer* ServerSource = FindServer(prefix);
2292
2293                 if (ServerSource)
2294                 {
2295                         if (params[0] == "*")
2296                         {
2297                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2298                         }
2299                         else if (*(params[0].c_str()) == '#')
2300                         {
2301                                 chanrec* c = this->Instance->FindChan(params[0]);
2302                                 if (c)
2303                                 {
2304                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2305                                 }
2306                         }
2307                         else if (*(params[0].c_str()) != '#')
2308                         {
2309                                 userrec* u = this->Instance->FindNick(params[0]);
2310                                 if (u)
2311                                 {
2312                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2313                                 }
2314                         }
2315                 }
2316
2317                 params[2] = ":" + params[2];
2318                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2319                 return true;
2320         }
2321
2322         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2323         {
2324                 if (params.size() < 1)
2325                         return true;
2326
2327                 TreeServer* ServerSource = FindServer(prefix);
2328
2329                 if (ServerSource)
2330                 {
2331                         ServerSource->SetVersion(params[0]);
2332                 }
2333                 params[0] = ":" + params[0];
2334                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2335                 return true;
2336         }
2337
2338         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2339         {
2340                 if (params.size() < 1)
2341                         return true;
2342
2343                 userrec* u = this->Instance->FindNick(prefix);
2344
2345                 if (u)
2346                 {
2347                         u->ChangeDisplayedHost(params[0].c_str());
2348                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2349                 }
2350                 return true;
2351         }
2352
2353         bool AddLine(std::string prefix, std::deque<std::string> &params)
2354         {
2355                 if (params.size() < 6)
2356                         return true;
2357
2358                 bool propogate = false;
2359
2360                 switch (*(params[0].c_str()))
2361                 {
2362                         case 'Z':
2363                                 propogate = ServerInstance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2364                                 ServerInstance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2365                         break;
2366                         case 'Q':
2367                                 propogate = ServerInstance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2368                                 ServerInstance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2369                         break;
2370                         case 'E':
2371                                 propogate = ServerInstance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2372                                 ServerInstance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2373                         break;
2374                         case 'G':
2375                                 propogate = ServerInstance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2376                                 ServerInstance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2377                         break;
2378                         case 'K':
2379                                 propogate = ServerInstance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2380                         break;
2381                         default:
2382                                 /* Just in case... */
2383                                 this->Instance->WriteOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2384                                 propogate = false;
2385                         break;
2386                 }
2387
2388                 /* Send it on its way */
2389                 if (propogate)
2390                 {
2391                         if (atoi(params[4].c_str()))
2392                         {
2393                                 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());
2394                         }
2395                         else
2396                         {
2397                                 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());
2398                         }
2399                         params[5] = ":" + params[5];
2400                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2401                 }
2402                 if (!this->bursting)
2403                 {
2404                         ServerInstance->Log(DEBUG,"Applying lines...");
2405                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2406                 }
2407                 return true;
2408         }
2409
2410         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2411         {
2412                 if (params.size() < 1)
2413                         return true;
2414
2415                 userrec* u = this->Instance->FindNick(prefix);
2416
2417                 if (u)
2418                 {
2419                         u->ChangeName(params[0].c_str());
2420                         params[0] = ":" + params[0];
2421                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2422                 }
2423                 return true;
2424         }
2425
2426         bool Whois(std::string prefix, std::deque<std::string> &params)
2427         {
2428                 if (params.size() < 1)
2429                         return true;
2430
2431                 ServerInstance->Log(DEBUG,"In IDLE command");
2432                 userrec* u = this->Instance->FindNick(prefix);
2433
2434                 if (u)
2435                 {
2436                         ServerInstance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2437                         // an incoming request
2438                         if (params.size() == 1)
2439                         {
2440                                 userrec* x = this->Instance->FindNick(params[0]);
2441                                 if ((x) && (IS_LOCAL(x)))
2442                                 {
2443                                         userrec* x = this->Instance->FindNick(params[0]);
2444                                         ServerInstance->Log(DEBUG,"Got IDLE");
2445                                         char signon[MAXBUF];
2446                                         char idle[MAXBUF];
2447                                         ServerInstance->Log(DEBUG,"Sending back IDLE 3");
2448                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2449                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2450                                         std::deque<std::string> par;
2451                                         par.push_back(prefix);
2452                                         par.push_back(signon);
2453                                         par.push_back(idle);
2454                                         // ours, we're done, pass it BACK
2455                                         DoOneToOne(params[0],"IDLE",par,u->server);
2456                                 }
2457                                 else
2458                                 {
2459                                         // not ours pass it on
2460                                         DoOneToOne(prefix,"IDLE",params,x->server);
2461                                 }
2462                         }
2463                         else if (params.size() == 3)
2464                         {
2465                                 std::string who_did_the_whois = params[0];
2466                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2467                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2468                                 {
2469                                         ServerInstance->Log(DEBUG,"Got final IDLE");
2470                                         // an incoming reply to a whois we sent out
2471                                         std::string nick_whoised = prefix;
2472                                         unsigned long signon = atoi(params[1].c_str());
2473                                         unsigned long idle = atoi(params[2].c_str());
2474                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2475                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2476                                 }
2477                                 else
2478                                 {
2479                                         // not ours, pass it on
2480                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2481                                 }
2482                         }
2483                 }
2484                 return true;
2485         }
2486
2487         bool Push(std::string prefix, std::deque<std::string> &params)
2488         {
2489                 if (params.size() < 2)
2490                         return true;
2491
2492                 userrec* u = this->Instance->FindNick(params[0]);
2493
2494                 if (!u)
2495                         return true;
2496
2497                 if (IS_LOCAL(u))
2498                 {
2499                         u->Write(params[1]);
2500                 }
2501                 else
2502                 {
2503                         // continue the raw onwards
2504                         params[1] = ":" + params[1];
2505                         DoOneToOne(prefix,"PUSH",params,u->server);
2506                 }
2507                 return true;
2508         }
2509
2510         bool Time(std::string prefix, std::deque<std::string> &params)
2511         {
2512                 // :source.server TIME remote.server sendernick
2513                 // :remote.server TIME source.server sendernick TS
2514                 if (params.size() == 2)
2515                 {
2516                         // someone querying our time?
2517                         if (this->Instance->Config->ServerName == params[0])
2518                         {
2519                                 userrec* u = this->Instance->FindNick(params[1]);
2520                                 if (u)
2521                                 {
2522                                         char curtime[256];
2523                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2524                                         params.push_back(curtime);
2525                                         params[0] = prefix;
2526                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2527                                 }
2528                         }
2529                         else
2530                         {
2531                                 // not us, pass it on
2532                                 userrec* u = this->Instance->FindNick(params[1]);
2533                                 if (u)
2534                                         DoOneToOne(prefix,"TIME",params,params[0]);
2535                         }
2536                 }
2537                 else if (params.size() == 3)
2538                 {
2539                         // a response to a previous TIME
2540                         userrec* u = this->Instance->FindNick(params[1]);
2541                         if ((u) && (IS_LOCAL(u)))
2542                         {
2543                         time_t rawtime = atol(params[2].c_str());
2544                         struct tm * timeinfo;
2545                         timeinfo = localtime(&rawtime);
2546                                 char tms[26];
2547                                 snprintf(tms,26,"%s",asctime(timeinfo));
2548                                 tms[24] = 0;
2549                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2550                         }
2551                         else
2552                         {
2553                                 if (u)
2554                                         DoOneToOne(prefix,"TIME",params,u->server);
2555                         }
2556                 }
2557                 return true;
2558         }
2559
2560         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2561         {
2562                 if (params.size() < 1)
2563                         return true;
2564
2565                 if (params.size() == 1)
2566                 {
2567                         std::string stufftobounce = params[0];
2568                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2569                         return true;
2570                 }
2571                 else
2572                 {
2573                         std::string forwardto = params[1];
2574                         if (forwardto == this->Instance->Config->ServerName)
2575                         {
2576                                 // this is a ping for us, send back PONG to the requesting server
2577                                 params[1] = params[0];
2578                                 params[0] = forwardto;
2579                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2580                         }
2581                         else
2582                         {
2583                                 // not for us, pass it on :)
2584                                 DoOneToOne(prefix,"PING",params,forwardto);
2585                         }
2586                         return true;
2587                 }
2588         }
2589
2590         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2591         {
2592                 if (params.size() < 4)
2593                         return false;
2594
2595                 std::string servername = params[0];
2596                 std::string password = params[1];
2597                 // hopcount is not used for a remote server, we calculate this ourselves
2598                 std::string description = params[3];
2599                 TreeServer* ParentOfThis = FindServer(prefix);
2600
2601                 if (!ParentOfThis)
2602                 {
2603                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2604                         return false;
2605                 }
2606                 TreeServer* CheckDupe = FindServer(servername);
2607                 if (CheckDupe)
2608                 {
2609                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2610                         this->Instance->WriteOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2611                         return false;
2612                 }
2613                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2614                 ParentOfThis->AddChild(Node);
2615                 params[3] = ":" + params[3];
2616                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2617                 this->Instance->WriteOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2618                 return true;
2619         }
2620
2621         bool Outbound_Reply_Server(std::deque<std::string> &params)
2622         {
2623                 if (params.size() < 4)
2624                         return false;
2625
2626                 irc::string servername = params[0].c_str();
2627                 std::string sname = params[0];
2628                 std::string password = params[1];
2629                 int hops = atoi(params[2].c_str());
2630
2631                 if (hops)
2632                 {
2633                         this->WriteLine("ERROR :Server too far away for authentication");
2634                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2635                         return false;
2636                 }
2637                 std::string description = params[3];
2638                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2639                 {
2640                         if ((x->Name == servername) && (x->RecvPass == password))
2641                         {
2642                                 TreeServer* CheckDupe = FindServer(sname);
2643                                 if (CheckDupe)
2644                                 {
2645                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2646                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2647                                         return false;
2648                                 }
2649                                 // Begin the sync here. this kickstarts the
2650                                 // other side, waiting in WAIT_AUTH_2 state,
2651                                 // into starting their burst, as it shows
2652                                 // that we're happy.
2653                                 this->LinkState = CONNECTED;
2654                                 // we should add the details of this server now
2655                                 // to the servers tree, as a child of the root
2656                                 // node.
2657                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2658                                 TreeRoot->AddChild(Node);
2659                                 params[3] = ":" + params[3];
2660                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2661                                 this->bursting = true;
2662                                 this->DoBurst(Node);
2663                                 return true;
2664                         }
2665                 }
2666                 this->WriteLine("ERROR :Invalid credentials");
2667                 this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2668                 return false;
2669         }
2670
2671         bool Inbound_Server(std::deque<std::string> &params)
2672         {
2673                 if (params.size() < 4)
2674                         return false;
2675
2676                 irc::string servername = params[0].c_str();
2677                 std::string sname = params[0];
2678                 std::string password = params[1];
2679                 int hops = atoi(params[2].c_str());
2680
2681                 if (hops)
2682                 {
2683                         this->WriteLine("ERROR :Server too far away for authentication");
2684                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2685                         return false;
2686                 }
2687                 std::string description = params[3];
2688                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2689                 {
2690                         if ((x->Name == servername) && (x->RecvPass == password))
2691                         {
2692                                 TreeServer* CheckDupe = FindServer(sname);
2693                                 if (CheckDupe)
2694                                 {
2695                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2696                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2697                                         return false;
2698                                 }
2699                                 /* If the config says this link is encrypted, but the remote side
2700                                  * hasnt bothered to send the AES command before SERVER, then we
2701                                  * boot them off as we MUST have this connection encrypted.
2702                                  */
2703                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2704                                 {
2705                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2706                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2707                                         return false;
2708                                 }
2709                                 this->Instance->WriteOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2710                                 this->InboundServerName = sname;
2711                                 this->InboundDescription = description;
2712                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2713                                 // along with the sendpass from this block.
2714                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2715                                 // move to the next state, we are now waiting for THEM.
2716                                 this->LinkState = WAIT_AUTH_2;
2717                                 return true;
2718                         }
2719                 }
2720                 this->WriteLine("ERROR :Invalid credentials");
2721                 this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2722                 return false;
2723         }
2724
2725         void Split(std::string line, std::deque<std::string> &n)
2726         {
2727                 n.clear();
2728                 irc::tokenstream tokens(line);
2729                 std::string param;
2730                 while ((param = tokens.GetToken()) != "")
2731                         n.push_back(param);
2732                 return;
2733         }
2734
2735         bool ProcessLine(std::string line)
2736         {
2737                 std::deque<std::string> params;
2738                 irc::string command;
2739                 std::string prefix;
2740
2741                 if (line.empty())
2742                         return true;
2743
2744                 line = line.substr(0, line.find_first_of("\r\n"));
2745
2746                 ServerInstance->Log(DEBUG,"IN: %s", line.c_str());
2747
2748                 this->Split(line.c_str(),params);
2749
2750                 if ((params[0][0] == ':') && (params.size() > 1))
2751                 {
2752                         prefix = params[0].substr(1);
2753                         params.pop_front();
2754                 }
2755
2756                 command = params[0].c_str();
2757                 params.pop_front();
2758
2759                 if ((!this->ctx_in) && (command == "AES"))
2760                 {
2761                         std::string sserv = params[0];
2762                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2763                         {
2764                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2765                                 {
2766                                         this->InitAES(x->EncryptionKey,sserv);
2767                                 }
2768                         }
2769
2770                         return true;
2771                 }
2772                 else if ((this->ctx_in) && (command == "AES"))
2773                 {
2774                         this->Instance->WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2775                 }
2776
2777                 switch (this->LinkState)
2778                 {
2779                         TreeServer* Node;
2780
2781                         case WAIT_AUTH_1:
2782                                 // Waiting for SERVER command from remote server. Server initiating
2783                                 // the connection sends the first SERVER command, listening server
2784                                 // replies with theirs if its happy, then if the initiator is happy,
2785                                 // it starts to send its net sync, which starts the merge, otherwise
2786                                 // it sends an ERROR.
2787                                 if (command == "PASS")
2788                                 {
2789                                         /* Silently ignored */
2790                                 }
2791                                 else if (command == "SERVER")
2792                                 {
2793                                         return this->Inbound_Server(params);
2794                                 }
2795                                 else if (command == "ERROR")
2796                                 {
2797                                         return this->Error(params);
2798                                 }
2799                                 else if (command == "USER")
2800                                 {
2801                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2802                                         return false;
2803                                 }
2804                                 else if (command == "CAPAB")
2805                                 {
2806                                         return this->Capab(params);
2807                                 }
2808                                 else if ((command == "U") || (command == "S"))
2809                                 {
2810                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2811                                         return false;
2812                                 }
2813                                 else
2814                                 {
2815                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2816                                         return false;
2817                                 }
2818                         break;
2819                         case WAIT_AUTH_2:
2820                                 // Waiting for start of other side's netmerge to say they liked our
2821                                 // password.
2822                                 if (command == "SERVER")
2823                                 {
2824                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2825                                         // silently ignore.
2826                                         return true;
2827                                 }
2828                                 else if ((command == "U") || (command == "S"))
2829                                 {
2830                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2831                                         return false;
2832                                 }
2833                                 else if (command == "BURST")
2834                                 {
2835                                         if (params.size())
2836                                         {
2837                                                 /* If a time stamp is provided, try and check syncronization */
2838                                                 time_t THEM = atoi(params[0].c_str());
2839                                                 long delta = THEM-time(NULL);
2840                                                 if ((delta < -600) || (delta > 600))
2841                                                 {
2842                                                         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));
2843                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2844                                                         return false;
2845                                                 }
2846                                                 else if ((delta < -60) || (delta > 60))
2847                                                 {
2848                                                         this->Instance->WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2849                                                 }
2850                                         }
2851                                         this->LinkState = CONNECTED;
2852                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2853                                         TreeRoot->AddChild(Node);
2854                                         params.clear();
2855                                         params.push_back(InboundServerName);
2856                                         params.push_back("*");
2857                                         params.push_back("1");
2858                                         params.push_back(":"+InboundDescription);
2859                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2860                                         this->bursting = true;
2861                                         this->DoBurst(Node);
2862                                 }
2863                                 else if (command == "ERROR")
2864                                 {
2865                                         return this->Error(params);
2866                                 }
2867                                 else if (command == "CAPAB")
2868                                 {
2869                                         return this->Capab(params);
2870                                 }
2871
2872                         break;
2873                         case LISTENER:
2874                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2875                                 return false;
2876                         break;
2877                         case CONNECTING:
2878                                 if (command == "SERVER")
2879                                 {
2880                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2881                                         // has just sent us their credentials. If we get this far, theyre
2882                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2883                                         // if we're happy with this, we should send our netburst which
2884                                         // kickstarts the merge.
2885                                         return this->Outbound_Reply_Server(params);
2886                                 }
2887                                 else if (command == "ERROR")
2888                                 {
2889                                         return this->Error(params);
2890                                 }
2891                         break;
2892                         case CONNECTED:
2893                                 // This is the 'authenticated' state, when all passwords
2894                                 // have been exchanged and anything past this point is taken
2895                                 // as gospel.
2896
2897                                 if (prefix != "")
2898                                 {
2899                                         std::string direction = prefix;
2900                                         userrec* t = this->Instance->FindNick(prefix);
2901                                         if (t)
2902                                         {
2903                                                 direction = t->server;
2904                                         }
2905                                         TreeServer* route_back_again = BestRouteTo(direction);
2906                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2907                                         {
2908                                                 if (route_back_again)
2909                                                         ServerInstance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2910                                                 return true;
2911                                         }
2912
2913                                         /* Fix by brain:
2914                                          * When there is activity on the socket, reset the ping counter so
2915                                          * that we're not wasting bandwidth pinging an active server.
2916                                          */
2917                                         route_back_again->SetNextPingTime(time(NULL) + 60);
2918                                         route_back_again->SetPingFlag();
2919                                 }
2920
2921                                 if (command == "SVSMODE")
2922                                 {
2923                                         /* Services expects us to implement
2924                                          * SVSMODE. In inspircd its the same as
2925                                          * MODE anyway.
2926                                          */
2927                                         command = "MODE";
2928                                 }
2929                                 std::string target = "";
2930                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2931                                  * working with std::string here.
2932                                  */
2933                                 if ((command == "NICK") && (params.size() > 1))
2934                                 {
2935                                         return this->IntroduceClient(prefix,params);
2936                                 }
2937                                 else if (command == "FJOIN")
2938                                 {
2939                                         return this->ForceJoin(prefix,params);
2940                                 }
2941                                 else if (command == "STATS")
2942                                 {
2943                                         return this->Stats(prefix, params);
2944                                 }
2945                                 else if (command == "MOTD")
2946                                 {
2947                                         return this->Motd(prefix, params);
2948                                 }
2949                                 else if (command == "SERVER")
2950                                 {
2951                                         return this->RemoteServer(prefix,params);
2952                                 }
2953                                 else if (command == "ERROR")
2954                                 {
2955                                         return this->Error(params);
2956                                 }
2957                                 else if (command == "OPERTYPE")
2958                                 {
2959                                         return this->OperType(prefix,params);
2960                                 }
2961                                 else if (command == "FMODE")
2962                                 {
2963                                         return this->ForceMode(prefix,params);
2964                                 }
2965                                 else if (command == "KILL")
2966                                 {
2967                                         return this->RemoteKill(prefix,params);
2968                                 }
2969                                 else if (command == "FTOPIC")
2970                                 {
2971                                         return this->ForceTopic(prefix,params);
2972                                 }
2973                                 else if (command == "REHASH")
2974                                 {
2975                                         return this->RemoteRehash(prefix,params);
2976                                 }
2977                                 else if (command == "METADATA")
2978                                 {
2979                                         return this->MetaData(prefix,params);
2980                                 }
2981                                 else if (command == "PING")
2982                                 {
2983                                         /*
2984                                          * We just got a ping from a server that's bursting.
2985                                          * This can't be right, so set them to not bursting, and
2986                                          * apply their lines.
2987                                          */
2988                                         if (this->bursting)
2989                                         {
2990                                                 this->bursting = false;
2991                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2992                                         }
2993                                         if (prefix == "")
2994                                         {
2995                                                 prefix = this->GetName();
2996                                         }
2997                                         return this->LocalPing(prefix,params);
2998                                 }
2999                                 else if (command == "PONG")
3000                                 {
3001                                         /*
3002                                          * We just got a pong from a server that's bursting.
3003                                          * This can't be right, so set them to not bursting, and
3004                                          * apply their lines.
3005                                          */
3006                                         if (this->bursting)
3007                                         {
3008                                                 this->bursting = false;
3009                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3010                                         }
3011                                         if (prefix == "")
3012                                         {
3013                                                 prefix = this->GetName();
3014                                         }
3015                                         return this->LocalPong(prefix,params);
3016                                 }
3017                                 else if (command == "VERSION")
3018                                 {
3019                                         return this->ServerVersion(prefix,params);
3020                                 }
3021                                 else if (command == "FHOST")
3022                                 {
3023                                         return this->ChangeHost(prefix,params);
3024                                 }
3025                                 else if (command == "FNAME")
3026                                 {
3027                                         return this->ChangeName(prefix,params);
3028                                 }
3029                                 else if (command == "ADDLINE")
3030                                 {
3031                                         return this->AddLine(prefix,params);
3032                                 }
3033                                 else if (command == "SVSNICK")
3034                                 {
3035                                         if (prefix == "")
3036                                         {
3037                                                 prefix = this->GetName();
3038                                         }
3039                                         return this->ForceNick(prefix,params);
3040                                 }
3041                                 else if (command == "IDLE")
3042                                 {
3043                                         return this->Whois(prefix,params);
3044                                 }
3045                                 else if (command == "PUSH")
3046                                 {
3047                                         return this->Push(prefix,params);
3048                                 }
3049                                 else if (command == "TIME")
3050                                 {
3051                                         return this->Time(prefix,params);
3052                                 }
3053                                 else if ((command == "KICK") && (IsServer(prefix)))
3054                                 {
3055                                         std::string sourceserv = this->myhost;
3056                                         if (params.size() == 3)
3057                                         {
3058                                                 userrec* user = this->Instance->FindNick(params[1]);
3059                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3060                                                 if (user && chan)
3061                                                 {
3062                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3063                                                                 /* Yikes, the channels gone! */
3064                                                                 delete chan;
3065                                                 }
3066                                         }
3067                                         if (this->InboundServerName != "")
3068                                         {
3069                                                 sourceserv = this->InboundServerName;
3070                                         }
3071                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3072                                 }
3073                                 else if (command == "SVSJOIN")
3074                                 {
3075                                         if (prefix == "")
3076                                         {
3077                                                 prefix = this->GetName();
3078                                         }
3079                                         return this->ServiceJoin(prefix,params);
3080                                 }
3081                                 else if (command == "SQUIT")
3082                                 {
3083                                         if (params.size() == 2)
3084                                         {
3085                                                 this->Squit(FindServer(params[0]),params[1]);
3086                                         }
3087                                         return true;
3088                                 }
3089                                 else if (command == "ENDBURST")
3090                                 {
3091                                         this->bursting = false;
3092                                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3093                                         std::string sourceserv = this->myhost;
3094                                         if (this->InboundServerName != "")
3095                                         {
3096                                                 sourceserv = this->InboundServerName;
3097                                         }
3098                                         this->Instance->WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
3099                                         return true;
3100                                 }
3101                                 else
3102                                 {
3103                                         // not a special inter-server command.
3104                                         // Emulate the actual user doing the command,
3105                                         // this saves us having a huge ugly parser.
3106                                         userrec* who = this->Instance->FindNick(prefix);
3107                                         std::string sourceserv = this->myhost;
3108                                         if (this->InboundServerName != "")
3109                                         {
3110                                                 sourceserv = this->InboundServerName;
3111                                         }
3112                                         if (who)
3113                                         {
3114                                                 if ((command == "NICK") && (params.size() > 0))
3115                                                 {
3116                                                         /* On nick messages, check that the nick doesnt
3117                                                          * already exist here. If it does, kill their copy,
3118                                                          * and our copy.
3119                                                          */
3120                                                         userrec* x = this->Instance->FindNick(params[0]);
3121                                                         if ((x) && (x != who))
3122                                                         {
3123                                                                 std::deque<std::string> p;
3124                                                                 p.push_back(params[0]);
3125                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3126                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3127                                                                 p.clear();
3128                                                                 p.push_back(prefix);
3129                                                                 p.push_back("Nickname collision");
3130                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3131                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3132                                                                 userrec* y = this->Instance->FindNick(prefix);
3133                                                                 if (y)
3134                                                                 {
3135                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3136                                                                 }
3137                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3138                                                         }
3139                                                 }
3140                                                 // its a user
3141                                                 target = who->server;
3142                                                 const char* strparams[127];
3143                                                 for (unsigned int q = 0; q < params.size(); q++)
3144                                                 {
3145                                                         strparams[q] = params[q].c_str();
3146                                                 }
3147                                                 if (!this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3148                                                 {
3149                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3150                                                         return false;
3151                                                 }
3152                                         }
3153                                         else
3154                                         {
3155                                                 // its not a user. Its either a server, or somethings screwed up.
3156                                                 if (IsServer(prefix))
3157                                                 {
3158                                                         target = this->Instance->Config->ServerName;
3159                                                 }
3160                                                 else
3161                                                 {
3162                                                         ServerInstance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3163                                                         return true;
3164                                                 }
3165                                         }
3166                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3167
3168                                 }
3169                                 return true;
3170                         break;
3171                 }
3172                 return true;
3173         }
3174
3175         virtual std::string GetName()
3176         {
3177                 std::string sourceserv = this->myhost;
3178                 if (this->InboundServerName != "")
3179                 {
3180                         sourceserv = this->InboundServerName;
3181                 }
3182                 return sourceserv;
3183         }
3184
3185         virtual void OnTimeout()
3186         {
3187                 if (this->LinkState == CONNECTING)
3188                 {
3189                         this->Instance->WriteOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
3190                 }
3191         }
3192
3193         virtual void OnClose()
3194         {
3195                 // Connection closed.
3196                 // If the connection is fully up (state CONNECTED)
3197                 // then propogate a netsplit to all peers.
3198                 std::string quitserver = this->myhost;
3199                 if (this->InboundServerName != "")
3200                 {
3201                         quitserver = this->InboundServerName;
3202                 }
3203                 TreeServer* s = FindServer(quitserver);
3204                 if (s)
3205                 {
3206                         Squit(s,"Remote host closed the connection");
3207                 }
3208                 this->Instance->WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
3209         }
3210
3211         virtual int OnIncomingConnection(int newsock, char* ip)
3212         {
3213                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3214                  * or discovering if this port is the server port, we don't allow connections from any
3215                  * IPs for which we don't have a link block.
3216                  */
3217                 bool found = false;
3218
3219                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3220                 if (!found)
3221                 {
3222                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3223                                 if (MatchCIDR(ip, (*i).c_str()))
3224                                         found = true;
3225
3226                         if (!found)
3227                         {
3228                                 this->Instance->WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
3229                                 close(newsock);
3230                                 return false;
3231                         }
3232                 }
3233                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3234                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3235                 return true;
3236         }
3237 };
3238
3239 /** This class is used to resolve server hostnames during /connect and autoconnect.
3240  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3241  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3242  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3243  * will have an IP address which we can then use to continue our connection.
3244  */
3245 class ServernameResolver : public Resolver
3246 {
3247  private:
3248         /** A copy of the Link tag info for what we're connecting to.
3249          * We take a copy, rather than using a pointer, just in case the
3250          * admin takes the tag away and rehashes while the domain is resolving.
3251          */
3252         Link MyLink;
3253  public:
3254         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3255         {
3256                 /* Nothing in here, folks */
3257         }
3258
3259         void OnLookupComplete(const std::string &result)
3260         {
3261                 /* Initiate the connection, now that we have an IP to use.
3262                  * Passing a hostname directly to InspSocket causes it to
3263                  * just bail and set its FD to -1.
3264                  */
3265                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3266                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3267                 {
3268                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3269                         if (newsocket->GetFd() > -1)
3270                         {
3271                                 /* We're all OK */
3272                         }
3273                         else
3274                         {
3275                                 /* Something barfed, show the opers */
3276                                 ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3277                                 delete newsocket;
3278                         }
3279                 }
3280         }
3281
3282         void OnError(ResolverError e, const std::string &errormessage)
3283         {
3284                 /* Ooops! */
3285                 ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3286         }
3287 };
3288
3289 class SecurityIPResolver : public Resolver
3290 {
3291  private:
3292         Link MyLink;
3293  public:
3294         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3295         {
3296         }
3297
3298         void OnLookupComplete(const std::string &result)
3299         {
3300                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3301                 ValidIPs.push_back(result);
3302         }
3303
3304         void OnError(ResolverError e, const std::string &errormessage)
3305         {
3306                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3307         }
3308 };
3309
3310 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3311 {
3312         for (unsigned int c = 0; c < list.size(); c++)
3313         {
3314                 if (list[c] == server)
3315                 {
3316                         return;
3317                 }
3318         }
3319         list.push_back(server);
3320 }
3321
3322 // returns a list of DIRECT servernames for a specific channel
3323 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3324 {
3325         CUList *ulist = c->GetUsers();
3326         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3327         {
3328                 if (i->second->GetFd() < 0)
3329                 {
3330                         TreeServer* best = BestRouteTo(i->second->server);
3331                         if (best)
3332                                 AddThisServer(best,list);
3333                 }
3334         }
3335         return;
3336 }
3337
3338 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3339 {
3340         TreeServer* omitroute = BestRouteTo(omit);
3341         if ((command == "NOTICE") || (command == "PRIVMSG"))
3342         {
3343                 if (params.size() >= 2)
3344                 {
3345                         /* Prefixes */
3346                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3347                         {
3348                                 params[0] = params[0].substr(1, params[0].length()-1);
3349                         }
3350                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3351                         {
3352                                 // special routing for private messages/notices
3353                                 userrec* d = ServerInstance->FindNick(params[0]);
3354                                 if (d)
3355                                 {
3356                                         std::deque<std::string> par;
3357                                         par.push_back(params[0]);
3358                                         par.push_back(":"+params[1]);
3359                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3360                                         return true;
3361                                 }
3362                         }
3363                         else if (*(params[0].c_str()) == '$')
3364                         {
3365                                 std::deque<std::string> par;
3366                                 par.push_back(params[0]);
3367                                 par.push_back(":"+params[1]);
3368                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3369                                 return true;
3370                         }
3371                         else
3372                         {
3373                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3374                                 chanrec* c = ServerInstance->FindChan(params[0]);
3375                                 if (c)
3376                                 {
3377                                         std::deque<TreeServer*> list;
3378                                         GetListOfServersForChannel(c,list);
3379                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3380                                         unsigned int lsize = list.size();
3381                                         for (unsigned int i = 0; i < lsize; i++)
3382                                         {
3383                                                 TreeSocket* Sock = list[i]->GetSocket();
3384                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3385                                                 {
3386                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3387                                                         Sock->WriteLine(data);
3388                                                 }
3389                                         }
3390                                         return true;
3391                                 }
3392                         }
3393                 }
3394         }
3395         unsigned int items = TreeRoot->ChildCount();
3396         for (unsigned int x = 0; x < items; x++)
3397         {
3398                 TreeServer* Route = TreeRoot->GetChild(x);
3399                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3400                 {
3401                         TreeSocket* Sock = Route->GetSocket();
3402                         if (Sock)
3403                                 Sock->WriteLine(data);
3404                 }
3405         }
3406         return true;
3407 }
3408
3409 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3410 {
3411         TreeServer* omitroute = BestRouteTo(omit);
3412         std::string FullLine = ":" + prefix + " " + command;
3413         unsigned int words = params.size();
3414         for (unsigned int x = 0; x < words; x++)
3415         {
3416                 FullLine = FullLine + " " + params[x];
3417         }
3418         unsigned int items = TreeRoot->ChildCount();
3419         for (unsigned int x = 0; x < items; x++)
3420         {
3421                 TreeServer* Route = TreeRoot->GetChild(x);
3422                 // Send the line IF:
3423                 // The route has a socket (its a direct connection)
3424                 // The route isnt the one to be omitted
3425                 // The route isnt the path to the one to be omitted
3426                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3427                 {
3428                         TreeSocket* Sock = Route->GetSocket();
3429                         if (Sock)
3430                                 Sock->WriteLine(FullLine);
3431                 }
3432         }
3433         return true;
3434 }
3435
3436 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3437 {
3438         std::string FullLine = ":" + prefix + " " + command;
3439         unsigned int words = params.size();
3440         for (unsigned int x = 0; x < words; x++)
3441         {
3442                 FullLine = FullLine + " " + params[x];
3443         }
3444         unsigned int items = TreeRoot->ChildCount();
3445         for (unsigned int x = 0; x < items; x++)
3446         {
3447                 TreeServer* Route = TreeRoot->GetChild(x);
3448                 if (Route && Route->GetSocket())
3449                 {
3450                         TreeSocket* Sock = Route->GetSocket();
3451                         if (Sock)
3452                                 Sock->WriteLine(FullLine);
3453                 }
3454         }
3455         return true;
3456 }
3457
3458 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3459 {
3460         std::string spfx = prefix;
3461         std::string scmd = command;
3462         return DoOneToMany(spfx, scmd, params);
3463 }
3464
3465 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3466 {
3467         std::string spfx = prefix;
3468         std::string scmd = command;
3469         return DoOneToAllButSender(spfx, scmd, params, omit);
3470 }
3471
3472 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3473 {
3474         TreeServer* Route = BestRouteTo(target);
3475         if (Route)
3476         {
3477                 std::string FullLine = ":" + prefix + " " + command;
3478                 unsigned int words = params.size();
3479                 for (unsigned int x = 0; x < words; x++)
3480                 {
3481                         FullLine = FullLine + " " + params[x];
3482                 }
3483                 if (Route && Route->GetSocket())
3484                 {
3485                         TreeSocket* Sock = Route->GetSocket();
3486                         if (Sock)
3487                                 Sock->WriteLine(FullLine);
3488                 }
3489                 return true;
3490         }
3491         else
3492         {
3493                 return false;
3494         }
3495 }
3496
3497 std::vector<TreeSocket*> Bindings;
3498
3499 void ReadConfiguration(bool rebind)
3500 {
3501         Conf = new ConfigReader(ServerInstance);
3502         if (rebind)
3503         {
3504                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3505                 {
3506                         std::string Type = Conf->ReadValue("bind","type",j);
3507                         std::string IP = Conf->ReadValue("bind","address",j);
3508                         long Port = Conf->ReadInteger("bind","port",j,true);
3509                         if (Type == "servers")
3510                         {
3511                                 if (IP == "*")
3512                                 {
3513                                         IP = "";
3514                                 }
3515                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3516                                 if (listener->GetState() == I_LISTENING)
3517                                 {
3518                                         Bindings.push_back(listener);
3519                                 }
3520                                 else
3521                                 {
3522                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3523                                         listener->Close();
3524                                         DELETE(listener);
3525                                 }
3526                         }
3527                 }
3528         }
3529         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3530         HideULines = Conf->ReadFlag("options","hideulines",0);
3531         LinkBlocks.clear();
3532         ValidIPs.clear();
3533         for (int j =0; j < Conf->Enumerate("link"); j++)
3534         {
3535                 Link L;
3536                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3537                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3538                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3539                 L.Port = Conf->ReadInteger("link","port",j,true);
3540                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3541                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3542                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3543                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3544                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3545                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3546                 /* Bugfix by brain, do not allow people to enter bad configurations */
3547                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3548                 {
3549                         ValidIPs.push_back(L.IPAddr);
3550
3551                         if (Allow.length())
3552                                 ValidIPs.push_back(Allow);
3553
3554                         /* Needs resolving */
3555                         insp_inaddr binip;
3556                         if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3557                         {
3558                                 try
3559                                 {
3560                                         SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3561                                         ServerInstance->AddResolver(sr);
3562                                 }
3563                                 catch (ModuleException& e)
3564                                 {
3565                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3566                                 }
3567                         }
3568
3569                         LinkBlocks.push_back(L);
3570                         ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3571                 }
3572                 else
3573                 {
3574                         if (L.IPAddr == "")
3575                         {
3576                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3577                         }
3578                         else if (L.RecvPass == "")
3579                         {
3580                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3581                         }
3582                         else if (L.SendPass == "")
3583                         {
3584                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3585                         }
3586                         else if (L.Name == "")
3587                         {
3588                                 ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3589                         }
3590                         else if (!L.Port)
3591                         {
3592                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3593                         }
3594                 }
3595         }
3596         DELETE(Conf);
3597 }
3598
3599
3600 class ModuleSpanningTree : public Module
3601 {
3602         std::vector<TreeSocket*> Bindings;
3603         int line;
3604         int NumServers;
3605         unsigned int max_local;
3606         unsigned int max_global;
3607         cmd_rconnect* command_rconnect;
3608
3609  public:
3610
3611         ModuleSpanningTree(InspIRCd* Me)
3612                 : Module::Module(Me), max_local(0), max_global(0)
3613         {
3614
3615                 Bindings.clear();
3616
3617                 ::ServerInstance = Me;
3618
3619                 // Create the root of the tree
3620                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3621
3622                 ReadConfiguration(true);
3623
3624                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3625                 ServerInstance->AddCommand(command_rconnect);
3626         }
3627
3628         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3629         {
3630                 std::string Parent = TreeRoot->GetName();
3631                 if (Current->GetParent())
3632                 {
3633                         Parent = Current->GetParent()->GetName();
3634                 }
3635                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3636                 {
3637                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3638                         {
3639                                 if (*user->oper)
3640                                 {
3641                                          ShowLinks(Current->GetChild(q),user,hops+1);
3642                                 }
3643                         }
3644                         else
3645                         {
3646                                 ShowLinks(Current->GetChild(q),user,hops+1);
3647                         }
3648                 }
3649                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3650                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3651                         return;
3652                 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());
3653         }
3654
3655         int CountLocalServs()
3656         {
3657                 return TreeRoot->ChildCount();
3658         }
3659
3660         int CountServs()
3661         {
3662                 return serverlist.size();
3663         }
3664
3665         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3666         {
3667                 ShowLinks(TreeRoot,user,0);
3668                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3669                 return;
3670         }
3671
3672         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3673         {
3674                 unsigned int n_users = ServerInstance->UserCount();
3675
3676                 /* Only update these when someone wants to see them, more efficient */
3677                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3678                         max_local = ServerInstance->LocalUserCount();
3679                 if (n_users > max_global)
3680                         max_global = n_users;
3681
3682                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3683                 if (ServerInstance->OperCount())
3684                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3685                 if (ServerInstance->UnregisteredUserCount())
3686                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3687                 if (ServerInstance->ChannelCount())
3688                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3689                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3690                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3691                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3692                 return;
3693         }
3694
3695         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3696
3697         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3698         {
3699                 if (line < 128)
3700                 {
3701                         for (int t = 0; t < depth; t++)
3702                         {
3703                                 matrix[line][t] = ' ';
3704                         }
3705
3706                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3707                         // a 'Spacer' String to compensate.
3708                         char spacer[40];
3709
3710                         memset(spacer,' ',40);
3711                         if ((40 - Current->GetName().length() - depth) > 1) {
3712                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3713                         }
3714                         else
3715                         {
3716                                 spacer[5] = '\0';
3717                         }
3718
3719                         float percent;
3720                         char text[80];
3721                         if (ServerInstance->clientlist.size() == 0) {
3722                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3723                                 percent = 0;
3724                         }
3725                         else
3726                         {
3727                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3728                         }
3729                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3730                         totusers += Current->GetUserCount();
3731                         totservers++;
3732                         strlcpy(&matrix[line][depth],text,80);
3733                         line++;
3734                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3735                         {
3736                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3737                                 {
3738                                         if (*user->oper)
3739                                         {
3740                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3741                                         }
3742                                 }
3743                                 else
3744                                 {
3745                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3746                                 }
3747                         }
3748                 }
3749         }
3750
3751         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3752         {
3753                 if (pcnt > 0)
3754                 {
3755                         /* Remote MOTD, the server is within the 1st parameter */
3756                         std::deque<std::string> params;
3757                         params.push_back(parameters[0]);
3758
3759                         /* Send it out remotely, generate no reply yet */
3760                         TreeServer* s = FindServerMask(parameters[0]);
3761                         if (s)
3762                         {
3763                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3764                         }
3765                         else
3766                         {
3767                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3768                         }
3769                         return 1;
3770                 }
3771                 return 0;
3772         }
3773
3774         int HandleStats(const char** parameters, int pcnt, userrec* user)
3775         {
3776                 if (pcnt > 1)
3777                 {
3778                         /* Remote STATS, the server is within the 2nd parameter */
3779                         std::deque<std::string> params;
3780                         params.push_back(parameters[0]);
3781                         params.push_back(parameters[1]);
3782                         /* Send it out remotely, generate no reply yet */
3783                         TreeServer* s = FindServerMask(parameters[1]);
3784                         if (s)
3785                         {
3786                                 params[1] = s->GetName();
3787                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3788                         }
3789                         else
3790                         {
3791                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3792                         }
3793                         return 1;
3794                 }
3795                 return 0;
3796         }
3797
3798         // Ok, prepare to be confused.
3799         // After much mulling over how to approach this, it struck me that
3800         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3801         // keeping track of a ton of ascii characters, and line by line
3802         // under recursion working out where to place them using multiplications
3803         // and divisons, we instead render the map onto a backplane of characters
3804         // (a character matrix), then draw the branches as a series of "L" shapes
3805         // from the nodes. This is not only friendlier on CPU it uses less stack.
3806
3807         void HandleMap(const char** parameters, int pcnt, userrec* user)
3808         {
3809                 // This array represents a virtual screen which we will
3810                 // "scratch" draw to, as the console device of an irc
3811                 // client does not provide for a proper terminal.
3812                 float totusers = 0;
3813                 float totservers = 0;
3814                 char matrix[128][80];
3815                 for (unsigned int t = 0; t < 128; t++)
3816                 {
3817                         matrix[t][0] = '\0';
3818                 }
3819                 line = 0;
3820                 // The only recursive bit is called here.
3821                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3822                 // Process each line one by one. The algorithm has a limit of
3823                 // 128 servers (which is far more than a spanning tree should have
3824                 // anyway, so we're ok). This limit can be raised simply by making
3825                 // the character matrix deeper, 128 rows taking 10k of memory.
3826                 for (int l = 1; l < line; l++)
3827                 {
3828                         // scan across the line looking for the start of the
3829                         // servername (the recursive part of the algorithm has placed
3830                         // the servers at indented positions depending on what they
3831                         // are related to)
3832                         int first_nonspace = 0;
3833                         while (matrix[l][first_nonspace] == ' ')
3834                         {
3835                                 first_nonspace++;
3836                         }
3837                         first_nonspace--;
3838                         // Draw the `- (corner) section: this may be overwritten by
3839                         // another L shape passing along the same vertical pane, becoming
3840                         // a |- (branch) section instead.
3841                         matrix[l][first_nonspace] = '-';
3842                         matrix[l][first_nonspace-1] = '`';
3843                         int l2 = l - 1;
3844                         // Draw upwards until we hit the parent server, causing possibly
3845                         // other corners (`-) to become branches (|-)
3846                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3847                         {
3848                                 matrix[l2][first_nonspace-1] = '|';
3849                                 l2--;
3850                         }
3851                 }
3852                 // dump the whole lot to the user. This is the easy bit, honest.
3853                 for (int t = 0; t < line; t++)
3854                 {
3855                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
3856                 }
3857                 float avg_users = totusers / totservers;
3858                 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);
3859         user->WriteServ("007 %s :End of /MAP",user->nick);
3860                 return;
3861         }
3862
3863         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3864         {
3865                 TreeServer* s = FindServerMask(parameters[0]);
3866                 if (s)
3867                 {
3868                         if (s == TreeRoot)
3869                         {
3870                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3871                                 return 1;
3872                         }
3873                         TreeSocket* sock = s->GetSocket();
3874                         if (sock)
3875                         {
3876                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
3877                                 ServerInstance->WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3878                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3879                                 ServerInstance->SE->DelFd(sock);
3880                                 sock->Close();
3881                                 delete sock;
3882                         }
3883                         else
3884                         {
3885                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3886                         }
3887                 }
3888                 else
3889                 {
3890                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3891                 }
3892                 return 1;
3893         }
3894
3895         int HandleTime(const char** parameters, int pcnt, userrec* user)
3896         {
3897                 if ((IS_LOCAL(user)) && (pcnt))
3898                 {
3899                         TreeServer* found = FindServerMask(parameters[0]);
3900                         if (found)
3901                         {
3902                                 // we dont' override for local server
3903                                 if (found == TreeRoot)
3904                                         return 0;
3905
3906                                 std::deque<std::string> params;
3907                                 params.push_back(found->GetName());
3908                                 params.push_back(user->nick);
3909                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
3910                         }
3911                         else
3912                         {
3913                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
3914                         }
3915                 }
3916                 return 1;
3917         }
3918
3919         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
3920         {
3921                 if ((IS_LOCAL(user)) && (pcnt > 1))
3922                 {
3923                         userrec* remote = ServerInstance->FindNick(parameters[1]);
3924                         if ((remote) && (remote->GetFd() < 0))
3925                         {
3926                                 std::deque<std::string> params;
3927                                 params.push_back(parameters[1]);
3928                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3929                                 return 1;
3930                         }
3931                         else if (!remote)
3932                         {
3933                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
3934                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3935                                 return 1;
3936                         }
3937                 }
3938                 return 0;
3939         }
3940
3941         void DoPingChecks(time_t curtime)
3942         {
3943                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
3944                 {
3945                         TreeServer* serv = TreeRoot->GetChild(j);
3946                         TreeSocket* sock = serv->GetSocket();
3947                         if (sock)
3948                         {
3949                                 if (curtime >= serv->NextPingTime())
3950                                 {
3951                                         if (serv->AnsweredLastPing())
3952                                         {
3953                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
3954                                                 serv->SetNextPingTime(curtime + 60);
3955                                         }
3956                                         else
3957                                         {
3958                                                 // they didnt answer, boot them
3959                                                 ServerInstance->WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
3960                                                 sock->Squit(serv,"Ping timeout");
3961                                                 ServerInstance->SE->DelFd(sock);
3962                                                 sock->Close();
3963                                                 delete sock;
3964                                                 return;
3965                                         }
3966                                 }
3967                         }
3968                 }
3969         }
3970
3971         void AutoConnectServers(time_t curtime)
3972         {
3973                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3974                 {
3975                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
3976                         {
3977                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
3978                                 x->NextConnectTime = curtime + x->AutoConnect;
3979                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3980                                 if (!CheckDupe)
3981                                 {
3982                                         // an autoconnected server is not connected. Check if its time to connect it
3983                                         ServerInstance->WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
3984
3985                                         insp_inaddr binip;
3986
3987                                         /* Do we already have an IP? If so, no need to resolve it. */
3988                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
3989                                         {
3990                                                 TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
3991                                                 if (newsocket->GetFd() > -1)
3992                                                 {
3993                                                 }
3994                                                 else
3995                                                 {
3996                                                         ServerInstance->WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3997                                                         delete newsocket;
3998                                                 }
3999                                         }
4000                                         else
4001                                         {
4002                                                 try
4003                                                 {
4004                                                         ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4005                                                         ServerInstance->AddResolver(snr);
4006                                                 }
4007                                                 catch (ModuleException& e)
4008                                                 {
4009                                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4010                                                 }
4011                                         }
4012
4013                                 }
4014                         }
4015                 }
4016         }
4017
4018         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4019         {
4020                 // we've already checked if pcnt > 0, so this is safe
4021                 TreeServer* found = FindServerMask(parameters[0]);
4022                 if (found)
4023                 {
4024                         std::string Version = found->GetVersion();
4025                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4026                         if (found == TreeRoot)
4027                         {
4028                                 std::stringstream out(ServerInstance->Config->data005);
4029                                 std::string token = "";
4030                                 std::string line5 = "";
4031                                 int token_counter = 0;
4032
4033                                 while (!out.eof())
4034                                 {
4035                                         out >> token;
4036                                         line5 = line5 + token + " ";
4037                                         token_counter++;
4038
4039                                         if ((token_counter >= 13) || (out.eof() == true))
4040                                         {
4041                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4042                                                 line5 = "";
4043                                                 token_counter = 0;
4044                                         }
4045                                 }
4046                         }
4047                 }
4048                 else
4049                 {
4050                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4051                 }
4052                 return 1;
4053         }
4054
4055         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4056         {
4057                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4058                 {
4059                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4060                         {
4061                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4062                                 if (!CheckDupe)
4063                                 {
4064                                         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);
4065                                         insp_inaddr binip;
4066
4067                                         /* Do we already have an IP? If so, no need to resolve it. */
4068                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4069                                         {
4070                                                 TreeSocket* newsocket = new TreeSocket(ServerInstance,x->IPAddr,x->Port,false,10,x->Name.c_str());
4071                                                 if (newsocket->GetFd() > -1)
4072                                                 {
4073                                                 }
4074                                                 else
4075                                                 {
4076                                                         ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4077                                                         delete newsocket;
4078                                                 }
4079                                         }
4080                                         else
4081                                         {
4082                                                 try
4083                                                 {
4084                                                         ServernameResolver* snr = new ServernameResolver(ServerInstance, x->IPAddr, *x);
4085                                                         ServerInstance->AddResolver(snr);
4086                                                 }
4087                                                 catch (ModuleException& e)
4088                                                 {
4089                                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4090                                                 }
4091                                         }
4092                                         return 1;
4093                                 }
4094                                 else
4095                                 {
4096                                         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());
4097                                         return 1;
4098                                 }
4099                         }
4100                 }
4101                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4102                 return 1;
4103         }
4104
4105         virtual int OnStats(char statschar, userrec* user, string_list &results)
4106         {
4107                 if (statschar == 'c')
4108                 {
4109                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4110                         {
4111                                 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');
4112                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4113                         }
4114                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4115                         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);
4116                         return 1;
4117                 }
4118                 return 0;
4119         }
4120
4121         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
4122         {
4123                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4124                 if (!validated)
4125                         return 0;
4126
4127                 if (command == "CONNECT")
4128                 {
4129                         return this->HandleConnect(parameters,pcnt,user);
4130                 }
4131                 else if (command == "STATS")
4132                 {
4133                         return this->HandleStats(parameters,pcnt,user);
4134                 }
4135                 else if (command == "MOTD")
4136                 {
4137                         return this->HandleMotd(parameters,pcnt,user);
4138                 }
4139                 else if (command == "SQUIT")
4140                 {
4141                         return this->HandleSquit(parameters,pcnt,user);
4142                 }
4143                 else if (command == "MAP")
4144                 {
4145                         this->HandleMap(parameters,pcnt,user);
4146                         return 1;
4147                 }
4148                 else if ((command == "TIME") && (pcnt > 0))
4149                 {
4150                         return this->HandleTime(parameters,pcnt,user);
4151                 }
4152                 else if (command == "LUSERS")
4153                 {
4154                         this->HandleLusers(parameters,pcnt,user);
4155                         return 1;
4156                 }
4157                 else if (command == "LINKS")
4158                 {
4159                         this->HandleLinks(parameters,pcnt,user);
4160                         return 1;
4161                 }
4162                 else if (command == "WHOIS")
4163                 {
4164                         if (pcnt > 1)
4165                         {
4166                                 // remote whois
4167                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4168                         }
4169                 }
4170                 else if ((command == "VERSION") && (pcnt > 0))
4171                 {
4172                         this->HandleVersion(parameters,pcnt,user);
4173                         return 1;
4174                 }
4175                 else if (ServerInstance->IsValidModuleCommand(command, pcnt, user))
4176                 {
4177                         // this bit of code cleverly routes all module commands
4178                         // to all remote severs *automatically* so that modules
4179                         // can just handle commands locally, without having
4180                         // to have any special provision in place for remote
4181                         // commands and linking protocols.
4182                         std::deque<std::string> params;
4183                         params.clear();
4184                         for (int j = 0; j < pcnt; j++)
4185                         {
4186                                 if (strchr(parameters[j],' '))
4187                                 {
4188                                         params.push_back(":" + std::string(parameters[j]));
4189                                 }
4190                                 else
4191                                 {
4192                                         params.push_back(std::string(parameters[j]));
4193                                 }
4194                         }
4195                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4196                         DoOneToMany(user->nick,command,params);
4197                 }
4198                 return 0;
4199         }
4200
4201         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4202         {
4203                 TreeServer* s = FindServer(servername);
4204                 if (s)
4205                 {
4206                         description = s->GetDesc();
4207                 }
4208         }
4209
4210         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4211         {
4212                 if (IS_LOCAL(source))
4213                 {
4214                         std::deque<std::string> params;
4215                         params.push_back(dest->nick);
4216                         params.push_back(channel->name);
4217                         DoOneToMany(source->nick,"INVITE",params);
4218                 }
4219         }
4220
4221         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4222         {
4223                 std::deque<std::string> params;
4224                 params.push_back(chan->name);
4225                 params.push_back(":"+topic);
4226                 DoOneToMany(user->nick,"TOPIC",params);
4227         }
4228
4229         virtual void OnWallops(userrec* user, const std::string &text)
4230         {
4231                 if (IS_LOCAL(user))
4232                 {
4233                         std::deque<std::string> params;
4234                         params.push_back(":"+text);
4235                         DoOneToMany(user->nick,"WALLOPS",params);
4236                 }
4237         }
4238
4239         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4240         {
4241                 if (target_type == TYPE_USER)
4242                 {
4243                         userrec* d = (userrec*)dest;
4244                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4245                         {
4246                                 std::deque<std::string> params;
4247                                 params.clear();
4248                                 params.push_back(d->nick);
4249                                 params.push_back(":"+text);
4250                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4251                         }
4252                 }
4253                 else if (target_type == TYPE_CHANNEL)
4254                 {
4255                         if (IS_LOCAL(user))
4256                         {
4257                                 chanrec *c = (chanrec*)dest;
4258                                 if (c)
4259                                 {
4260                                         std::string cname = c->name;
4261                                         if (status)
4262                                                 cname = status + cname;
4263                                         std::deque<TreeServer*> list;
4264                                         GetListOfServersForChannel(c,list);
4265                                         unsigned int ucount = list.size();
4266                                         for (unsigned int i = 0; i < ucount; i++)
4267                                         {
4268                                                 TreeSocket* Sock = list[i]->GetSocket();
4269                                                 if (Sock)
4270                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4271                                         }
4272                                 }
4273                         }
4274                 }
4275                 else if (target_type == TYPE_SERVER)
4276                 {
4277                         if (IS_LOCAL(user))
4278                         {
4279                                 char* target = (char*)dest;
4280                                 std::deque<std::string> par;
4281                                 par.push_back(target);
4282                                 par.push_back(":"+text);
4283                                 DoOneToMany(user->nick,"NOTICE",par);
4284                         }
4285                 }
4286         }
4287
4288         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4289         {
4290                 if (target_type == TYPE_USER)
4291                 {
4292                         // route private messages which are targetted at clients only to the server
4293                         // which needs to receive them
4294                         userrec* d = (userrec*)dest;
4295                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4296                         {
4297                                 std::deque<std::string> params;
4298                                 params.clear();
4299                                 params.push_back(d->nick);
4300                                 params.push_back(":"+text);
4301                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4302                         }
4303                 }
4304                 else if (target_type == TYPE_CHANNEL)
4305                 {
4306                         if (IS_LOCAL(user))
4307                         {
4308                                 chanrec *c = (chanrec*)dest;
4309                                 if (c)
4310                                 {
4311                                         std::string cname = c->name;
4312                                         if (status)
4313                                                 cname = status + cname;
4314                                         std::deque<TreeServer*> list;
4315                                         GetListOfServersForChannel(c,list);
4316                                         unsigned int ucount = list.size();
4317                                         for (unsigned int i = 0; i < ucount; i++)
4318                                         {
4319                                                 TreeSocket* Sock = list[i]->GetSocket();
4320                                                 if (Sock)
4321                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4322                                         }
4323                                 }
4324                         }
4325                 }
4326                 else if (target_type == TYPE_SERVER)
4327                 {
4328                         if (IS_LOCAL(user))
4329                         {
4330                                 char* target = (char*)dest;
4331                                 std::deque<std::string> par;
4332                                 par.push_back(target);
4333                                 par.push_back(":"+text);
4334                                 DoOneToMany(user->nick,"PRIVMSG",par);
4335                         }
4336                 }
4337         }
4338
4339         virtual void OnBackgroundTimer(time_t curtime)
4340         {
4341                 AutoConnectServers(curtime);
4342                 DoPingChecks(curtime);
4343         }
4344
4345         virtual void OnUserJoin(userrec* user, chanrec* channel)
4346         {
4347                 // Only do this for local users
4348                 if (IS_LOCAL(user))
4349                 {
4350                         std::deque<std::string> params;
4351                         params.clear();
4352                         params.push_back(channel->name);
4353
4354                         if (channel->GetUserCounter() > 1)
4355                         {
4356                                 // not the first in the channel
4357                                 DoOneToMany(user->nick,"JOIN",params);
4358                         }
4359                         else
4360                         {
4361                                 // first in the channel, set up their permissions
4362                                 // and the channel TS with FJOIN.
4363                                 char ts[24];
4364                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
4365                                 params.clear();
4366                                 params.push_back(channel->name);
4367                                 params.push_back(ts);
4368                                 params.push_back("@,"+std::string(user->nick));
4369                                 DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4370                         }
4371                 }
4372         }
4373
4374         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4375         {
4376                 // only occurs for local clients
4377                 if (user->registered != REG_ALL)
4378                         return;
4379                 std::deque<std::string> params;
4380                 params.push_back(newhost);
4381                 DoOneToMany(user->nick,"FHOST",params);
4382         }
4383
4384         virtual void OnChangeName(userrec* user, const std::string &gecos)
4385         {
4386                 // only occurs for local clients
4387                 if (user->registered != REG_ALL)
4388                         return;
4389                 std::deque<std::string> params;
4390                 params.push_back(gecos);
4391                 DoOneToMany(user->nick,"FNAME",params);
4392         }
4393
4394         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4395         {
4396                 if (IS_LOCAL(user))
4397                 {
4398                         std::deque<std::string> params;
4399                         params.push_back(channel->name);
4400                         if (partmessage != "")
4401                                 params.push_back(":"+partmessage);
4402                         DoOneToMany(user->nick,"PART",params);
4403                 }
4404         }
4405
4406         virtual void OnUserConnect(userrec* user)
4407         {
4408                 char agestr[MAXBUF];
4409                 if (IS_LOCAL(user))
4410                 {
4411                         std::deque<std::string> params;
4412                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4413                         params.push_back(agestr);
4414                         params.push_back(user->nick);
4415                         params.push_back(user->host);
4416                         params.push_back(user->dhost);
4417                         params.push_back(user->ident);
4418                         params.push_back("+"+std::string(user->FormatModes()));
4419                         params.push_back(user->GetIPString());
4420                         params.push_back(":"+std::string(user->fullname));
4421                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4422
4423                         // User is Local, change needs to be reflected!
4424                         TreeServer* SourceServer = FindServer(user->server);
4425                         if (SourceServer)
4426                         {
4427                                 SourceServer->AddUserCount();
4428                         }
4429
4430                 }
4431         }
4432
4433         virtual void OnUserQuit(userrec* user, const std::string &reason)
4434         {
4435                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4436                 {
4437                         std::deque<std::string> params;
4438                         params.push_back(":"+reason);
4439                         DoOneToMany(user->nick,"QUIT",params);
4440                 }
4441                 // Regardless, We need to modify the user Counts..
4442                 TreeServer* SourceServer = FindServer(user->server);
4443                 if (SourceServer)
4444                 {
4445                         SourceServer->DelUserCount();
4446                 }
4447
4448         }
4449
4450         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4451         {
4452                 if (IS_LOCAL(user))
4453                 {
4454                         std::deque<std::string> params;
4455                         params.push_back(user->nick);
4456                         DoOneToMany(oldnick,"NICK",params);
4457                 }
4458         }
4459
4460         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4461         {
4462                 if ((source) && (IS_LOCAL(source)))
4463                 {
4464                         std::deque<std::string> params;
4465                         params.push_back(chan->name);
4466                         params.push_back(user->nick);
4467                         params.push_back(":"+reason);
4468                         DoOneToMany(source->nick,"KICK",params);
4469                 }
4470                 else if (!source)
4471                 {
4472                         std::deque<std::string> params;
4473                         params.push_back(chan->name);
4474                         params.push_back(user->nick);
4475                         params.push_back(":"+reason);
4476                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4477                 }
4478         }
4479
4480         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4481         {
4482                 std::deque<std::string> params;
4483                 params.push_back(dest->nick);
4484                 params.push_back(":"+reason);
4485                 DoOneToMany(source->nick,"KILL",params);
4486         }
4487
4488         virtual void OnRehash(const std::string &parameter)
4489         {
4490                 if (parameter != "")
4491                 {
4492                         std::deque<std::string> params;
4493                         params.push_back(parameter);
4494                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4495                         // check for self
4496                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4497                         {
4498                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4499                                 ServerInstance->RehashServer();
4500                         }
4501                 }
4502                 ReadConfiguration(false);
4503         }
4504
4505         // note: the protocol does not allow direct umode +o except
4506         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4507         // locally.
4508         virtual void OnOper(userrec* user, const std::string &opertype)
4509         {
4510                 if (IS_LOCAL(user))
4511                 {
4512                         std::deque<std::string> params;
4513                         params.push_back(opertype);
4514                         DoOneToMany(user->nick,"OPERTYPE",params);
4515                 }
4516         }
4517
4518         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4519         {
4520                 if (IS_LOCAL(source))
4521                 {
4522                         char type[8];
4523                         snprintf(type,8,"%cLINE",linetype);
4524                         std::string stype = type;
4525                         if (adding)
4526                         {
4527                                 char sduration[MAXBUF];
4528                                 snprintf(sduration,MAXBUF,"%ld",duration);
4529                                 std::deque<std::string> params;
4530                                 params.push_back(host);
4531                                 params.push_back(sduration);
4532                                 params.push_back(":"+reason);
4533                                 DoOneToMany(source->nick,stype,params);
4534                         }
4535                         else
4536                         {
4537                                 std::deque<std::string> params;
4538                                 params.push_back(host);
4539                                 DoOneToMany(source->nick,stype,params);
4540                         }
4541                 }
4542         }
4543
4544         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4545         {
4546                 OnLine(source,hostmask,true,'G',duration,reason);
4547         }
4548
4549         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4550         {
4551                 OnLine(source,ipmask,true,'Z',duration,reason);
4552         }
4553
4554         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4555         {
4556                 OnLine(source,nickmask,true,'Q',duration,reason);
4557         }
4558
4559         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4560         {
4561                 OnLine(source,hostmask,true,'E',duration,reason);
4562         }
4563
4564         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4565         {
4566                 OnLine(source,hostmask,false,'G',0,"");
4567         }
4568
4569         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4570         {
4571                 OnLine(source,ipmask,false,'Z',0,"");
4572         }
4573
4574         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4575         {
4576                 OnLine(source,nickmask,false,'Q',0,"");
4577         }
4578
4579         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4580         {
4581                 OnLine(source,hostmask,false,'E',0,"");
4582         }
4583
4584         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4585         {
4586                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4587                 {
4588                         if (target_type == TYPE_USER)
4589                         {
4590                                 userrec* u = (userrec*)dest;
4591                                 std::deque<std::string> params;
4592                                 params.push_back(u->nick);
4593                                 params.push_back(text);
4594                                 DoOneToMany(user->nick,"MODE",params);
4595                         }
4596                         else
4597                         {
4598                                 chanrec* c = (chanrec*)dest;
4599                                 std::deque<std::string> params;
4600                                 params.push_back(c->name);
4601                                 params.push_back(text);
4602                                 DoOneToMany(user->nick,"MODE",params);
4603                         }
4604                 }
4605         }
4606
4607         virtual void OnSetAway(userrec* user)
4608         {
4609                 if (IS_LOCAL(user))
4610                 {
4611                         std::deque<std::string> params;
4612                         params.push_back(":"+std::string(user->awaymsg));
4613                         DoOneToMany(user->nick,"AWAY",params);
4614                 }
4615         }
4616
4617         virtual void OnCancelAway(userrec* user)
4618         {
4619                 if (IS_LOCAL(user))
4620                 {
4621                         std::deque<std::string> params;
4622                         params.clear();
4623                         DoOneToMany(user->nick,"AWAY",params);
4624                 }
4625         }
4626
4627         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4628         {
4629                 TreeSocket* s = (TreeSocket*)opaque;
4630                 if (target)
4631                 {
4632                         if (target_type == TYPE_USER)
4633                         {
4634                                 userrec* u = (userrec*)target;
4635                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4636                         }
4637                         else
4638                         {
4639                                 chanrec* c = (chanrec*)target;
4640                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4641                         }
4642                 }
4643         }
4644
4645         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4646         {
4647                 TreeSocket* s = (TreeSocket*)opaque;
4648                 if (target)
4649                 {
4650                         if (target_type == TYPE_USER)
4651                         {
4652                                 userrec* u = (userrec*)target;
4653                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4654                         }
4655                         else if (target_type == TYPE_OTHER)
4656                         {
4657                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4658                         }
4659                         else if (target_type == TYPE_CHANNEL)
4660                         {
4661                                 chanrec* c = (chanrec*)target;
4662                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4663                         }
4664                 }
4665         }
4666
4667         virtual void OnEvent(Event* event)
4668         {
4669                 if (event->GetEventID() == "send_metadata")
4670                 {
4671                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4672                         if (params->size() < 3)
4673                                 return;
4674                         (*params)[2] = ":" + (*params)[2];
4675                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4676                 }
4677                 else if (event->GetEventID() == "send_mode")
4678                 {
4679                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4680                         if (params->size() < 2)
4681                                 return;
4682                         // Insert the TS value of the object, either userrec or chanrec
4683                         time_t ourTS = 0;
4684                         userrec* a = ServerInstance->FindNick((*params)[0]);
4685                         if (a)
4686                         {
4687                                 ourTS = a->age;
4688                         }
4689                         else
4690                         {
4691                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4692                                 if (a)
4693                                 {
4694                                         ourTS = a->age;
4695                                 }
4696                         }
4697                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4698                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4699                 }
4700         }
4701
4702         virtual ~ModuleSpanningTree()
4703         {
4704         }
4705
4706         virtual Version GetVersion()
4707         {
4708                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4709         }
4710
4711         void Implements(char* List)
4712         {
4713                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4714                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4715                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4716                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4717                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4718                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4719                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
4720         }
4721
4722         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4723          * so that any activity it sees is FINAL, e.g. we arent going to send out
4724          * a NICK message before m_cloaking has finished putting the +x on the user,
4725          * etc etc.
4726          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4727          * the module call queue.
4728          */
4729         Priority Prioritize()
4730         {
4731                 return PRIORITY_LAST;
4732         }
4733 };
4734
4735
4736 class ModuleSpanningTreeFactory : public ModuleFactory
4737 {
4738  public:
4739         ModuleSpanningTreeFactory()
4740         {
4741         }
4742
4743         ~ModuleSpanningTreeFactory()
4744         {
4745         }
4746
4747         virtual Module * CreateModule(InspIRCd* Me)
4748         {
4749                 TreeProtocolModule = new ModuleSpanningTree(Me);
4750                 return TreeProtocolModule;
4751         }
4752
4753 };
4754
4755
4756 extern "C" void * init_module( void )
4757 {
4758         return new ModuleSpanningTreeFactory;
4759 }