src/modules/m_spanningtree.cpp

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