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