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 "socket.h"
  34 #include "helperfuncs.h"
  35 #include "inspircd.h"
  36 #include "inspstring.h"
  37 #include "hashcomp.h"
  38 #include "message.h"
  39 #include "xline.h"
  40 #include "typedefs.h"
  41 #include "cull_list.h"
  42 #include "aes.h"
  43
  44 #ifdef GCC3
  45 #define nspace __gnu_cxx
  46 #else
  47 #define nspace std
  48 #endif
  49
  50 /*
  51  * The server list in InspIRCd is maintained as two structures
  52  * which hold the data in different ways. Most of the time, we
  53  * want to very quicky obtain three pieces of information:
  54  *
  55  * (1) The information on a server
  56  * (2) The information on the server we must send data through
  57  *     to actually REACH the server we're after
  58  * (3) Potentially, the child/parent objects of this server
  59  *
  60  * The InspIRCd spanning protocol provides easy access to these
  61  * by storing the data firstly in a recursive structure, where
  62  * each item references its parent item, and a dynamic list
  63  * of child items, and another structure which stores the items
  64  * hashed, linearly. This means that if we want to find a server
  65  * by name quickly, we can look it up in the hash, avoiding
  66  * any O(n) lookups. If however, during a split or sync, we want
  67  * to apply an operation to a server, and any of its child objects
  68  * we can resort to recursion to walk the tree structure.
  69  */
  70
  71 class ModuleSpanningTree;
  72 static ModuleSpanningTree* TreeProtocolModule;
  73
  74 extern ServerConfig* Config;
  75 extern InspIRCd* ServerInstance;
  76 extern std::vector<Module*> modules;
  77 extern std::vector<ircd_module*> factory;
  78 extern int MODCOUNT;
  79
  80 /* Any socket can have one of five states at any one time.
  81  * The LISTENER state indicates a socket which is listening
  82  * for connections. It cannot receive data itself, only incoming
  83  * sockets.
  84  * The CONNECTING state indicates an outbound socket which is
  85  * waiting to be writeable.
  86  * The WAIT_AUTH_1 state indicates the socket is outbound and
  87  * has successfully connected, but has not yet sent and received
  88  * SERVER strings.
  89  * The WAIT_AUTH_2 state indicates that the socket is inbound
  90  * (allocated by a LISTENER) but has not yet sent and received
  91  * SERVER strings.
  92  * The CONNECTED state represents a fully authorized, fully
  93  * connected server.
  94  */
  95 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  96
  97 /* We need to import these from the core for use in netbursts */
  98 extern user_hash clientlist;
  99 extern chan_hash chanlist;
 100
 101 /* Foward declarations */
 102 class TreeServer;
 103 class TreeSocket;
 104
 105 /* This variable represents the root of the server tree
 106  * (for all intents and purposes, it's us)
 107  */
 108 TreeServer *TreeRoot;
 109
 110 static Server* Srv;
 111
 112 /* This hash_map holds the hash equivalent of the server
 113  * tree, used for rapid linear lookups.
 114  */
 115 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
 116 server_hash serverlist;
 117
 118 /* More forward declarations */
 119 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 120 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 121 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 122 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 123 void ReadConfiguration(bool rebind);
 124
 125 /* Flatten links and /MAP for non-opers */
 126 bool FlatLinks;
 127 /* Hide U-Lined servers in /MAP and /LINKS */
 128 bool HideULines;
 129
 130 /* Imported from xline.cpp for use during netburst */
 131 extern std::vector<KLine> klines;
 132 extern std::vector<GLine> glines;
 133 extern std::vector<ZLine> zlines;
 134 extern std::vector<QLine> qlines;
 135 extern std::vector<ELine> elines;
 136 extern std::vector<KLine> pklines;
 137 extern std::vector<GLine> pglines;
 138 extern std::vector<ZLine> pzlines;
 139 extern std::vector<QLine> pqlines;
 140 extern std::vector<ELine> pelines;
 141
 142 /* Each server in the tree is represented by one class of
 143  * type TreeServer. A locally connected TreeServer can
 144  * have a class of type TreeSocket associated with it, for
 145  * remote servers, the TreeSocket entry will be NULL.
 146  * Each server also maintains a pointer to its parent
 147  * (NULL if this server is ours, at the top of the tree)
 148  * and a pointer to its "Route" (see the comments in the
 149  * constructors below), and also a dynamic list of pointers
 150  * to its children which can be iterated recursively
 151  * if required. Creating or deleting objects of type
 152  i* TreeServer automatically maintains the hash_map of
 153  * TreeServer items, deleting and inserting them as they
 154  * are created and destroyed.
 155  */
 156
 157 class TreeServer : public classbase
 158 {
 159         TreeServer* Parent;                     /* Parent entry */
 160         TreeServer* Route;                      /* Route entry */
 161         std::vector<TreeServer*> Children;      /* List of child objects */
 162         irc::string ServerName;                 /* Server's name */
 163         std::string ServerDesc;                 /* Server's description */
 164         std::string VersionString;              /* Version string or empty string */
 165         int UserCount;                          /* Not used in this version */
 166         int OperCount;                          /* Not used in this version */
 167         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 168         time_t NextPing;                        /* After this time, the server should be PINGed*/
 169         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 170
 171  public:
 172
 173         /* We don't use this constructor. Its a dummy, and won't cause any insertion
 174          * of the TreeServer into the hash_map. See below for the two we DO use.
 175          */
 176         TreeServer()
 177         {
 178                 Parent = NULL;
 179                 ServerName = "";
 180                 ServerDesc = "";
 181                 VersionString = "";
 182                 UserCount = OperCount = 0;
 183                 VersionString = Srv->GetVersion();
 184         }
 185
 186         /* We use this constructor only to create the 'root' item, TreeRoot, which
 187          * represents our own server. Therefore, it has no route, no parent, and
 188          * no socket associated with it. Its version string is our own local version.
 189          */
 190         TreeServer(std::string Name, std::string Desc) : ServerName(Name.c_str()), ServerDesc(Desc)
 191         {
 192                 Parent = NULL;
 193                 VersionString = "";
 194                 UserCount = OperCount = 0;
 195                 VersionString = Srv->GetVersion();
 196                 Route = NULL;
 197                 Socket = NULL; /* Fix by brain */
 198                 AddHashEntry();
 199         }
 200
 201         /* When we create a new server, we call this constructor to initialize it.
 202          * This constructor initializes the server's Route and Parent, and sets up
 203          * its ping counters so that it will be pinged one minute from now.
 204          */
 205         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 206         {
 207                 VersionString = "";
 208                 UserCount = OperCount = 0;
 209                 this->SetNextPingTime(time(NULL) + 120);
 210                 this->SetPingFlag();
 211
 212                 /* find the 'route' for this server (e.g. the one directly connected
 213                  * to the local server, which we can use to reach it)
 214                  *
 215                  * In the following example, consider we have just added a TreeServer
 216                  * class for server G on our network, of which we are server A.
 217                  * To route traffic to G (marked with a *) we must send the data to
 218                  * B (marked with a +) so this algorithm initializes the 'Route'
 219                  * value to point at whichever server traffic must be routed through
 220                  * to get here. If we were to try this algorithm with server B,
 221                  * the Route pointer would point at its own object ('this').
 222                  *
 223                  *              A
 224                  *             / \
 225                  *          + B   C
 226                  *           / \   \
 227                  *          D   E   F
 228                  *         /         \
 229                  *      * G           H
 230                  *
 231                  * We only run this algorithm when a server is created, as
 232                  * the routes remain constant while ever the server exists, and
 233                  * do not need to be re-calculated.
 234                  */
 235
 236                 Route = Above;
 237                 if (Route == TreeRoot)
 238                 {
 239                         Route = this;
 240                 }
 241                 else
 242                 {
 243                         while (this->Route->GetParent() != TreeRoot)
 244                         {
 245                                 this->Route = Route->GetParent();
 246                         }
 247                 }
 248
 249                 /* Because recursive code is slow and takes a lot of resources,
 250                  * we store two representations of the server tree. The first
 251                  * is a recursive structure where each server references its
 252                  * children and its parent, which is used for netbursts and
 253                  * netsplits to dump the whole dataset to the other server,
 254                  * and the second is used for very fast lookups when routing
 255                  * messages and is instead a hash_map, where each item can
 256                  * be referenced by its server name. The AddHashEntry()
 257                  * call below automatically inserts each TreeServer class
 258                  * into the hash_map as it is created. There is a similar
 259                  * maintainance call in the destructor to tidy up deleted
 260                  * servers.
 261                  */
 262
 263                 this->AddHashEntry();
 264         }
 265
 266         int QuitUsers(const std::string &reason)
 267         {
 268                 log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 269                 const char* reason_s = reason.c_str();
 270                 std::vector<userrec*> time_to_die;
 271                 for (user_hash::iterator n = clientlist.begin(); n != clientlist.end(); n++)
 272                 {
 273                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 274                         {
 275                                 time_to_die.push_back(n->second);
 276                         }
 277                 }
 278                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 279                 {
 280                         userrec* a = (userrec*)*n;
 281                         log(DEBUG,"Kill %s fd=%d",a->nick,a->fd);
 282                         if (!IS_LOCAL(a))
 283                                 kill_link(a,reason_s);
 284                 }
 285                 return time_to_die.size();
 286         }
 287
 288         /* This method is used to add the structure to the
 289          * hash_map for linear searches. It is only called
 290          * by the constructors.
 291          */
 292         void AddHashEntry()
 293         {
 294                 server_hash::iterator iter;
 295                 iter = serverlist.find(this->ServerName.c_str());
 296                 if (iter == serverlist.end())
 297                         serverlist[this->ServerName.c_str()] = this;
 298         }
 299
 300         /* This method removes the reference to this object
 301          * from the hash_map which is used for linear searches.
 302          * It is only called by the default destructor.
 303          */
 304         void DelHashEntry()
 305         {
 306                 server_hash::iterator iter;
 307                 iter = serverlist.find(this->ServerName.c_str());
 308                 if (iter != serverlist.end())
 309                         serverlist.erase(iter);
 310         }
 311
 312         /* These accessors etc should be pretty self-
 313          * explanitory.
 314          */
 315
 316         TreeServer* GetRoute()
 317         {
 318                 return Route;
 319         }
 320
 321         std::string GetName()
 322         {
 323                 return ServerName.c_str();
 324         }
 325
 326         std::string GetDesc()
 327         {
 328                 return ServerDesc;
 329         }
 330
 331         std::string GetVersion()
 332         {
 333                 return VersionString;
 334         }
 335
 336         void SetNextPingTime(time_t t)
 337         {
 338                 this->NextPing = t;
 339                 LastPingWasGood = false;
 340         }
 341
 342         time_t NextPingTime()
 343         {
 344                 return NextPing;
 345         }
 346
 347         bool AnsweredLastPing()
 348         {
 349                 return LastPingWasGood;
 350         }
 351
 352         void SetPingFlag()
 353         {
 354                 LastPingWasGood = true;
 355         }
 356
 357         int GetUserCount()
 358         {
 359                 return UserCount;
 360         }
 361
 362         void AddUserCount()
 363         {
 364                 UserCount++;
 365         }
 366
 367         void DelUserCount()
 368         {
 369                 UserCount--;
 370         }
 371
 372         int GetOperCount()
 373         {
 374                 return OperCount;
 375         }
 376
 377         TreeSocket* GetSocket()
 378         {
 379                 return Socket;
 380         }
 381
 382         TreeServer* GetParent()
 383         {
 384                 return Parent;
 385         }
 386
 387         void SetVersion(std::string Version)
 388         {
 389                 VersionString = Version;
 390         }
 391
 392         unsigned int ChildCount()
 393         {
 394                 return Children.size();
 395         }
 396
 397         TreeServer* GetChild(unsigned int n)
 398         {
 399                 if (n < Children.size())
 400                 {
 401                         /* Make sure they  cant request
 402                          * an out-of-range object. After
 403                          * all we know what these programmer
 404                          * types are like *grin*.
 405                          */
 406                         return Children[n];
 407                 }
 408                 else
 409                 {
 410                         return NULL;
 411                 }
 412         }
 413
 414         void AddChild(TreeServer* Child)
 415         {
 416                 Children.push_back(Child);
 417         }
 418
 419         bool DelChild(TreeServer* Child)
 420         {
 421                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 422                 {
 423                         if (*a == Child)
 424                         {
 425                                 Children.erase(a);
 426                                 return true;
 427                         }
 428                 }
 429                 return false;
 430         }
 431
 432         /* Removes child nodes of this node, and of that node, etc etc.
 433          * This is used during netsplits to automatically tidy up the
 434          * server tree. It is slow, we don't use it for much else.
 435          */
 436         bool Tidy()
 437         {
 438                 bool stillchildren = true;
 439                 while (stillchildren)
 440                 {
 441                         stillchildren = false;
 442                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 443                         {
 444                                 TreeServer* s = (TreeServer*)*a;
 445                                 s->Tidy();
 446                                 Children.erase(a);
 447                                 DELETE(s);
 448                                 stillchildren = true;
 449                                 break;
 450                         }
 451                 }
 452                 return true;
 453         }
 454
 455         ~TreeServer()
 456         {
 457                 /* We'd better tidy up after ourselves, eh? */
 458                 this->DelHashEntry();
 459         }
 460 };
 461
 462 /* The Link class might as well be a struct,
 463  * but this is C++ and we don't believe in structs (!).
 464  * It holds the entire information of one <link>
 465  * tag from the main config file. We maintain a list
 466  * of them, and populate the list on rehash/load.
 467  */
 468
 469 class Link : public classbase
 470 {
 471  public:
 472          irc::string Name;
 473          std::string IPAddr;
 474          int Port;
 475          std::string SendPass;
 476          std::string RecvPass;
 477          unsigned long AutoConnect;
 478          time_t NextConnectTime;
 479          std::string EncryptionKey;
 480          bool HiddenFromStats;
 481 };
 482
 483 /* The usual stuff for inspircd modules,
 484  * plus the vector of Link classes which we
 485  * use to store the <link> tags from the config
 486  * file.
 487  */
 488 ConfigReader *Conf;
 489 std::vector<Link> LinkBlocks;
 490
 491 /* Yay for fast searches!
 492  * This is hundreds of times faster than recursion
 493  * or even scanning a linked list, especially when
 494  * there are more than a few servers to deal with.
 495  * (read as: lots).
 496  */
 497 TreeServer* FindServer(std::string ServerName)
 498 {
 499         server_hash::iterator iter;
 500         iter = serverlist.find(ServerName.c_str());
 501         if (iter != serverlist.end())
 502         {
 503                 return iter->second;
 504         }
 505         else
 506         {
 507                 return NULL;
 508         }
 509 }
 510
 511 /* Returns the locally connected server we must route a
 512  * message through to reach server 'ServerName'. This
 513  * only applies to one-to-one and not one-to-many routing.
 514  * See the comments for the constructor of TreeServer
 515  * for more details.
 516  */
 517 TreeServer* BestRouteTo(std::string ServerName)
 518 {
 519         if (ServerName.c_str() == TreeRoot->GetName())
 520                 return NULL;
 521         TreeServer* Found = FindServer(ServerName);
 522         if (Found)
 523         {
 524                 return Found->GetRoute();
 525         }
 526         else
 527         {
 528                 return NULL;
 529         }
 530 }
 531
 532 /* Find the first server matching a given glob mask.
 533  * Theres no find-using-glob method of hash_map [awwww :-(]
 534  * so instead, we iterate over the list using an iterator
 535  * and match each one until we get a hit. Yes its slow,
 536  * deal with it.
 537  */
 538 TreeServer* FindServerMask(std::string ServerName)
 539 {
 540         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 541         {
 542                 if (Srv->MatchText(i->first.c_str(),ServerName))
 543                         return i->second;
 544         }
 545         return NULL;
 546 }
 547
 548 /* A convenient wrapper that returns true if a server exists */
 549 bool IsServer(std::string ServerName)
 550 {
 551         return (FindServer(ServerName) != NULL);
 552 }
 553
 554
 555 class cmd_rconnect : public command_t
 556 {
 557         Module* Creator;
 558  public:
 559         cmd_rconnect (Module* Callback) : command_t("RCONNECT", 'o', 2), Creator(Callback)
 560         {
 561                 this->source = "m_spanningtree.so";
 562         }
 563
 564         void Handle (char **parameters, int pcnt, userrec *user)
 565         {
 566                 WriteServ(user->fd,"NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 567                 /* Is this aimed at our server? */
 568                 if (Srv->MatchText(Srv->GetServerName(),parameters[0]))
 569                 {
 570                         /* Yes, initiate the given connect */
 571                         WriteOpers("*** Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 572                         char* para[1];
 573                         para[0] = parameters[1];
 574                         Creator->OnPreCommand("CONNECT", para, 1, user, true);
 575                 }
 576         }
 577 };
 578
 579
 580
 581 /* Every SERVER connection inbound or outbound is represented by
 582  * an object of type TreeSocket.
 583  * TreeSockets, being inherited from InspSocket, can be tied into
 584  * the core socket engine, and we cn therefore receive activity events
 585  * for them, just like activex objects on speed. (yes really, that
 586  * is a technical term!) Each of these which relates to a locally
 587  * connected server is assocated with it, by hooking it onto a
 588  * TreeSocket class using its constructor. In this way, we can
 589  * maintain a list of servers, some of which are directly connected,
 590  * some of which are not.
 591  */
 592
 593 class TreeSocket : public InspSocket
 594 {
 595         std::string myhost;
 596         std::string in_buffer;
 597         ServerState LinkState;
 598         std::string InboundServerName;
 599         std::string InboundDescription;
 600         int num_lost_users;
 601         int num_lost_servers;
 602         time_t NextPing;
 603         bool LastPingWasGood;
 604         bool bursting;
 605         AES* ctx_in;
 606         AES* ctx_out;
 607         unsigned int keylength;
 608
 609  public:
 610
 611         /* Because most of the I/O gubbins are encapsulated within
 612          * InspSocket, we just call the superclass constructor for
 613          * most of the action, and append a few of our own values
 614          * to it.
 615          */
 616         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 617                 : InspSocket(host, port, listening, maxtime)
 618         {
 619                 myhost = host;
 620                 this->LinkState = LISTENER;
 621                 this->ctx_in = NULL;
 622                 this->ctx_out = NULL;
 623         }
 624
 625         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 626                 : InspSocket(host, port, listening, maxtime)
 627         {
 628                 myhost = ServerName;
 629                 this->LinkState = CONNECTING;
 630                 this->ctx_in = NULL;
 631                 this->ctx_out = NULL;
 632         }
 633
 634         /* When a listening socket gives us a new file descriptor,
 635          * we must associate it with a socket without creating a new
 636          * connection. This constructor is used for this purpose.
 637          */
 638         TreeSocket(int newfd, char* ip)
 639                 : InspSocket(newfd, ip)
 640         {
 641                 this->LinkState = WAIT_AUTH_1;
 642                 this->ctx_in = NULL;
 643                 this->ctx_out = NULL;
 644                 this->SendCapabilities();
 645         }
 646
 647         ~TreeSocket()
 648         {
 649                 if (ctx_in)
 650                         DELETE(ctx_in);
 651                 if (ctx_out)
 652                         DELETE(ctx_out);
 653         }
 654
 655         void InitAES(std::string key,std::string SName)
 656         {
 657                 if (key == "")
 658                         return;
 659
 660                 ctx_in = new AES();
 661                 ctx_out = new AES();
 662                 log(DEBUG,"Initialized AES key %s",key.c_str());
 663                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 664                 keylength = key.length();
 665                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 666                 {
 667                         WriteOpers("*** \2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 668                         log(DEBUG,"Key length not 16, 24 or 32 characters!");
 669                 }
 670                 else
 671                 {
 672                         WriteOpers("*** \2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 673                         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\
 674                                 \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);
 675                         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\
 676                                 \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);
 677                 }
 678         }
 679
 680         /* When an outbound connection finishes connecting, we receive
 681          * this event, and must send our SERVER string to the other
 682          * side. If the other side is happy, as outlined in the server
 683          * to server docs on the inspircd.org site, the other side
 684          * will then send back its own server string.
 685          */
 686         virtual bool OnConnected()
 687         {
 688                 if (this->LinkState == CONNECTING)
 689                 {
 690                         /* we do not need to change state here. */
 691                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 692                         {
 693                                 if (x->Name == this->myhost)
 694                                 {
 695                                         Srv->SendOpers("*** Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 696                                         this->SendCapabilities();
 697                                         if (x->EncryptionKey != "")
 698                                         {
 699                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 700                                                 {
 701                                                         WriteOpers("\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 702                                                 }
 703                                                 else
 704                                                 {
 705                                                         this->WriteLine("AES "+Srv->GetServerName());
 706                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 707                                                 }
 708                                         }
 709                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 710                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 711                                         return true;
 712                                 }
 713                         }
 714                 }
 715                 /* There is a (remote) chance that between the /CONNECT and the connection
 716                  * being accepted, some muppet has removed the <link> block and rehashed.
 717                  * If that happens the connection hangs here until it's closed. Unlikely
 718                  * and rather harmless.
 719                  */
 720                 Srv->SendOpers("*** Connection to \2"+myhost+"\2 lost link tag(!)");
 721                 return true;
 722         }
 723
 724         virtual void OnError(InspSocketError e)
 725         {
 726                 /* We don't handle this method, because all our
 727                  * dirty work is done in OnClose() (see below)
 728                  * which is still called on error conditions too.
 729                  */
 730                 if (e == I_ERR_CONNECT)
 731                 {
 732                         Srv->SendOpers("*** Connection failed: Connection refused");
 733                 }
 734         }
 735
 736         virtual int OnDisconnect()
 737         {
 738                 /* For the same reason as above, we don't
 739                  * handle OnDisconnect()
 740                  */
 741                 return true;
 742         }
 743
 744         /* Recursively send the server tree with distances as hops.
 745          * This is used during network burst to inform the other server
 746          * (and any of ITS servers too) of what servers we know about.
 747          * If at any point any of these servers already exist on the other
 748          * end, our connection may be terminated. The hopcounts given
 749          * by this function are relative, this doesn't matter so long as
 750          * they are all >1, as all the remote servers re-calculate them
 751          * to be relative too, with themselves as hop 0.
 752          */
 753         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 754         {
 755                 char command[1024];
 756                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 757                 {
 758                         TreeServer* recursive_server = Current->GetChild(q);
 759                         if (recursive_server != s)
 760                         {
 761                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 762                                 this->WriteLine(command);
 763                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 764                                 /* down to next level */
 765                                 this->SendServers(recursive_server, s, hops+1);
 766                         }
 767                 }
 768         }
 769
 770         std::string MyCapabilities()
 771         {
 772                 ServerConfig* Config = Srv->GetConfig();
 773                 std::vector<std::string> modlist;
 774                 std::string capabilities = "";
 775
 776                 for (int i = 0; i <= MODCOUNT; i++)
 777                 {
 778                         if ((modules[i]->GetVersion().Flags & VF_STATIC) || (modules[i]->GetVersion().Flags & VF_COMMON))
 779                                 modlist.push_back(Config->module_names[i]);
 780                 }
 781                 sort(modlist.begin(),modlist.end());
 782                 for (unsigned int i = 0; i < modlist.size(); i++)
 783                 {
 784                         if (i)
 785                                 capabilities = capabilities + ",";
 786                         capabilities = capabilities + modlist[i];
 787                 }
 788                 return capabilities;
 789         }
 790
 791         void SendCapabilities()
 792         {
 793                 this->WriteLine("CAPAB "+MyCapabilities());
 794         }
 795
 796         bool Capab(std::deque<std::string> params)
 797         {
 798                 if (params.size() != 1)
 799                 {
 800                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB");
 801                         return false;
 802                 }
 803
 804                 if (params[0] != this->MyCapabilities())
 805                 {
 806                         std::string quitserver = this->myhost;
 807                         if (this->InboundServerName != "")
 808                         {
 809                                 quitserver = this->InboundServerName;
 810                         }
 811
 812                         WriteOpers("*** \2ERROR\2: Server '%s' does not have the same set of modules loaded, cannot link!",quitserver.c_str());
 813                         WriteOpers("*** Our networked module set is: '%s'",this->MyCapabilities().c_str());
 814                         WriteOpers("*** Other server's networked module set is: '%s'",params[0].c_str());
 815                         WriteOpers("*** These lists must match exactly on both servers. Please correct these errors, and try again.");
 816                         this->WriteLine("ERROR :CAPAB mismatch; My capabilities: '"+this->MyCapabilities()+"'");
 817                         return false;
 818                 }
 819
 820                 return true;
 821         }
 822
 823         /* This function forces this server to quit, removing this server
 824          * and any users on it (and servers and users below that, etc etc).
 825          * It's very slow and pretty clunky, but luckily unless your network
 826          * is having a REAL bad hair day, this function shouldnt be called
 827          * too many times a month ;-)
 828          */
 829         void SquitServer(std::string &from, TreeServer* Current)
 830         {
 831                 /* recursively squit the servers attached to 'Current'.
 832                  * We're going backwards so we don't remove users
 833                  * while we still need them ;)
 834                  */
 835                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 836                 {
 837                         TreeServer* recursive_server = Current->GetChild(q);
 838                         this->SquitServer(from,recursive_server);
 839                 }
 840                 /* Now we've whacked the kids, whack self */
 841                 num_lost_servers++;
 842                 num_lost_users += Current->QuitUsers(from);
 843                 /*for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 844                 {
 845                         if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 846                         {
 847                                 Goners->AddItem(u->second,from);
 848                                 num_lost_users++;
 849                         }
 850                 }*/
 851         }
 852
 853         /* This is a wrapper function for SquitServer above, which
 854          * does some validation first and passes on the SQUIT to all
 855          * other remaining servers.
 856          */
 857         void Squit(TreeServer* Current,std::string reason)
 858         {
 859                 if ((Current) && (Current != TreeRoot))
 860                 {
 861                         std::deque<std::string> params;
 862                         params.push_back(Current->GetName());
 863                         params.push_back(":"+reason);
 864                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 865                         if (Current->GetParent() == TreeRoot)
 866                         {
 867                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 868                         }
 869                         else
 870                         {
 871                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 872                         }
 873                         num_lost_servers = 0;
 874                         num_lost_users = 0;
 875                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
 876                         SquitServer(from, Current);
 877                         Current->Tidy();
 878                         Current->GetParent()->DelChild(Current);
 879                         DELETE(Current);
 880                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 881                 }
 882                 else
 883                 {
 884                         log(DEFAULT,"Squit from unknown server");
 885                 }
 886         }
 887
 888         /* FMODE command */
 889         bool ForceMode(std::string source, std::deque<std::string> &params)
 890         {
 891                 if (params.size() < 2)
 892                         return true;
 893                 userrec* who = new userrec();
 894                 who->fd = FD_MAGIC_NUMBER;
 895                 char* modelist[64];
 896                 memset(&modelist,0,sizeof(modelist));
 897                 for (unsigned int q = 0; q < params.size(); q++)
 898                 {
 899                         modelist[q] = (char*)params[q].c_str();
 900                 }
 901                 Srv->SendMode(modelist,params.size(),who);
 902                 DoOneToAllButSender(source,"FMODE",params,source);
 903                 DELETE(who);
 904                 return true;
 905         }
 906
 907         /* FTOPIC command */
 908         bool ForceTopic(std::string source, std::deque<std::string> &params)
 909         {
 910                 if (params.size() != 4)
 911                         return true;
 912                 time_t ts = atoi(params[1].c_str());
 913                 std::string nsource = source;
 914
 915                 chanrec* c = Srv->FindChannel(params[0]);
 916                 if (c)
 917                 {
 918                         if ((ts >= c->topicset) || (!*c->topic))
 919                         {
 920                                 std::string oldtopic = c->topic;
 921                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
 922                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
 923                                 c->topicset = ts;
 924                                 /* if the topic text is the same as the current topic,
 925                                  * dont bother to send the TOPIC command out, just silently
 926                                  * update the set time and set nick.
 927                                  */
 928                                 if (oldtopic != params[3])
 929                                 {
 930                                         userrec* user = Srv->FindNick(source);
 931                                         if (!user)
 932                                         {
 933                                                 WriteChannelWithServ(source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 934                                         }
 935                                         else
 936                                         {
 937                                                 WriteChannel(c, user, "TOPIC %s :%s", c->name, c->topic);
 938                                                 nsource = user->server;
 939                                         }
 940                                         /* all done, send it on its way */
 941                                         params[3] = ":" + params[3];
 942                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
 943                                 }
 944                         }
 945
 946                 }
 947
 948                 return true;
 949         }
 950
 951         /* FJOIN, similar to unreal SJOIN */
 952         bool ForceJoin(std::string source, std::deque<std::string> &params)
 953         {
 954                 if (params.size() < 3)
 955                         return true;
 956
 957                 char first[MAXBUF];
 958                 char modestring[MAXBUF];
 959                 char* mode_users[127];
 960                 memset(&mode_users,0,sizeof(mode_users));
 961                 mode_users[0] = first;
 962                 mode_users[1] = modestring;
 963                 strcpy(mode_users[1],"+");
 964                 unsigned int modectr = 2;
 965
 966                 userrec* who = NULL;
 967                 std::string channel = params[0];
 968                 time_t TS = atoi(params[1].c_str());
 969                 char* key = "";
 970
 971                 chanrec* chan = Srv->FindChannel(channel);
 972                 if (chan)
 973                 {
 974                         key = chan->key;
 975                 }
 976                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
 977
 978                 /* default is a high value, which if we dont have this
 979                  * channel will let the other side apply their modes.
 980                  */
 981                 time_t ourTS = time(NULL)+600;
 982                 chanrec* us = Srv->FindChannel(channel);
 983                 if (us)
 984                 {
 985                         ourTS = us->age;
 986                 }
 987
 988                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
 989
 990                 /* do this first, so our mode reversals are correctly received by other servers
 991                  * if there is a TS collision.
 992                  */
 993                 DoOneToAllButSender(source,"FJOIN",params,source);
 994
 995                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
 996                 {
 997                         /* process one channel at a time, applying modes. */
 998                         char* usr = const_cast<char*>(params[usernum].c_str());
 999                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1000                          * (is this even possible?) */
1001                         if (usr && *usr)
1002                         {
1003                                 char permissions = *usr;
1004                                 switch (permissions)
1005                                 {
1006                                         case '@':
1007                                                 usr++;
1008                                                 mode_users[modectr++] = usr;
1009                                                 strlcat(modestring,"o",MAXBUF);
1010                                         break;
1011                                         case '%':
1012                                                 usr++;
1013                                                 mode_users[modectr++] = usr;
1014                                                 strlcat(modestring,"h",MAXBUF);
1015                                         break;
1016                                         case '+':
1017                                                 usr++;
1018                                                 mode_users[modectr++] = usr;
1019                                                 strlcat(modestring,"v",MAXBUF);
1020                                         break;
1021                                 }
1022                                 who = Srv->FindNick(usr);
1023                                 if (who)
1024                                 {
1025                                         Srv->JoinUserToChannel(who,channel,key);
1026                                         if (modectr >= (MAXMODES-1))
1027                                         {
1028                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1029                                                  * if there are more than MAXMODES to go.
1030                                                  */
1031                                                 if ((ourTS >= TS) || (Srv->IsUlined(who->server)))
1032                                                 {
1033                                                         /* We also always let u-lined clients win, no matter what the TS value */
1034                                                         log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1035                                                         Srv->SendMode(mode_users,modectr,who);
1036                                                 }
1037                                                 else
1038                                                 {
1039                                                         log(DEBUG,"Their channel newer than ours, bouncing their modes");
1040                                                         /* bouncy bouncy! */
1041                                                         std::deque<std::string> params;
1042                                                         /* modes are now being UNSET... */
1043                                                         *mode_users[1] = '-';
1044                                                         for (unsigned int x = 0; x < modectr; x++)
1045                                                         {
1046                                                                 params.push_back(mode_users[x]);
1047                                                         }
1048                                                         // tell everyone to bounce the modes. bad modes, bad!
1049                                                         DoOneToMany(Srv->GetServerName(),"FMODE",params);
1050                                                 }
1051                                                 strcpy(mode_users[1],"+");
1052                                                 modectr = 2;
1053                                         }
1054                                 }
1055                         }
1056                 }
1057                 /* there werent enough modes built up to flush it during FJOIN,
1058                  * or, there are a number left over. flush them out.
1059                  */
1060                 if ((modectr > 2) && (who))
1061                 {
1062                         if (ourTS >= TS)
1063                         {
1064                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1065                                 Srv->SendMode(mode_users,modectr,who);
1066                         }
1067                         else
1068                         {
1069                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
1070                                 std::deque<std::string> params;
1071                                 *mode_users[1] = '-';
1072                                 for (unsigned int x = 0; x < modectr; x++)
1073                                 {
1074                                         params.push_back(mode_users[x]);
1075                                 }
1076                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
1077                         }
1078                 }
1079                 return true;
1080         }
1081
1082         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1083         {
1084                 if (params.size() == 2)
1085                 {
1086                         chanrec* c = Srv->FindChannel(params[0]);
1087                         if (c)
1088                         {
1089                                 time_t theirTS = atoi(params[1].c_str());
1090                                 time_t ourTS = c->age;
1091                                 if (ourTS >= theirTS)
1092                                 {
1093                                         log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1094                                         c->age = theirTS;
1095                                 }
1096                         }
1097                 }
1098                 DoOneToAllButSender(Srv->GetServerName(),"SYNCTS",params,source);
1099                 return true;
1100         }
1101
1102         /* NICK command */
1103         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1104         {
1105                 if (params.size() < 8)
1106                         return true;
1107                 if (params.size() > 8)
1108                 {
1109                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1110                         return true;
1111                 }
1112                 // NICK age nick host dhost ident +modes ip :gecos
1113                 //   0   123  4 56   7
1114                 time_t age = atoi(params[0].c_str());
1115
1116                 /* This used to have a pretty craq'y loop doing the same thing,
1117                  * now we just let the STL do the hard work (more efficiently)
1118                  */
1119                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1120
1121                 const char* tempnick = params[1].c_str();
1122                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1123
1124                 user_hash::iterator iter = clientlist.find(tempnick);
1125
1126                 if (iter != clientlist.end())
1127                 {
1128                         // nick collision
1129                         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);
1130                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
1131                         return true;
1132                 }
1133
1134                 clientlist[tempnick] = new userrec();
1135                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
1136                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX-1);
1137                 strlcpy(clientlist[tempnick]->host, params[2].c_str(),63);
1138                 strlcpy(clientlist[tempnick]->dhost, params[3].c_str(),63);
1139                 clientlist[tempnick]->server = FindServerNamePtr(source.c_str());
1140                 strlcpy(clientlist[tempnick]->ident, params[4].c_str(),IDENTMAX);
1141                 strlcpy(clientlist[tempnick]->fullname, params[7].c_str(),MAXGECOS);
1142                 clientlist[tempnick]->registered = 7;
1143                 clientlist[tempnick]->signon = age;
1144
1145                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1146                 {
1147                         clientlist[tempnick]->modes[(*v)-65] = 1;
1148                 }
1149                 inet_aton(params[6].c_str(),&clientlist[tempnick]->ip4);
1150
1151                 WriteOpers("*** Client connecting at %s: %s!%s@%s [%s]",clientlist[tempnick]->server,clientlist[tempnick]->nick,clientlist[tempnick]->ident,clientlist[tempnick]->host, inet_ntoa(clientlist[tempnick]->ip4));
1152
1153                 params[7] = ":" + params[7];
1154                 DoOneToAllButSender(source,"NICK",params,source);
1155
1156                 // Increment the Source Servers User Count..
1157                 TreeServer* SourceServer = FindServer(source);
1158                 if (SourceServer)
1159                 {
1160                         log(DEBUG,"Found source server of %s",clientlist[tempnick]->nick);
1161                         SourceServer->AddUserCount();
1162                 }
1163
1164                 return true;
1165         }
1166
1167         /* Send one or more FJOINs for a channel of users.
1168          * If the length of a single line is more than 480-NICKMAX
1169          * in length, it is split over multiple lines.
1170          */
1171         void SendFJoins(TreeServer* Current, chanrec* c)
1172         {
1173                 log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1174                 char list[MAXBUF];
1175                 std::string individual_halfops = ":"+Srv->GetServerName()+" FMODE "+c->name;
1176
1177                 size_t dlen, curlen;
1178                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1179                 int numusers = 0;
1180                 char* ptr = list + dlen;
1181
1182                 CUList *ulist = c->GetUsers();
1183                 std::vector<userrec*> specific_halfop;
1184                 std::vector<userrec*> specific_voice;
1185
1186                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1187                 {
1188                         int x = cflags(i->second,c);
1189                         if ((x & UCMODE_HOP) && (x & UCMODE_OP))
1190                         {
1191                                 specific_halfop.push_back(i->second);
1192                         }
1193                         if (((x & UCMODE_HOP) || (x & UCMODE_OP)) && (x & UCMODE_VOICE))
1194                         {
1195                                 specific_voice.push_back(i->second);
1196                         }
1197
1198                         const char* n = "";
1199                         if (x & UCMODE_OP)
1200                         {
1201                                 n = "@";
1202                         }
1203                         else if (x & UCMODE_HOP)
1204                         {
1205                                 n = "%";
1206                         }
1207                         else if (x & UCMODE_VOICE)
1208                         {
1209                                 n = "+";
1210                         }
1211
1212                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s", n, i->second->nick);
1213
1214                         curlen += ptrlen;
1215                         ptr += ptrlen;
1216
1217                         numusers++;
1218
1219                         if (curlen > (480-NICKMAX))
1220                         {
1221                                 this->WriteLine(list);
1222                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1223                                 ptr = list + dlen;
1224                                 ptrlen = 0;
1225                                 numusers = 0;
1226                                 for (unsigned int y = 0; y < specific_voice.size(); y++)
1227                                 {
1228                                         this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +v "+specific_voice[y]->nick);
1229                                 }
1230                                 for (unsigned int y = 0; y < specific_halfop.size(); y++)
1231                                 {
1232                                         this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +h "+specific_halfop[y]->nick);
1233                                 }
1234                         }
1235                 }
1236                 if (numusers)
1237                 {
1238                         this->WriteLine(list);
1239                         for (unsigned int y = 0; y < specific_voice.size(); y++)
1240                         {
1241                                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +v "+specific_voice[y]->nick);
1242                         }
1243                         for (unsigned int y = 0; y < specific_halfop.size(); y++)
1244                         {
1245                                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +h "+specific_halfop[y]->nick);
1246                         }
1247                 }
1248                 this->WriteLine(":"+Srv->GetServerName()+" SYNCTS "+c->name+" "+ConvToStr(c->age));
1249         }
1250
1251         /* Send G, Q, Z and E lines */
1252         void SendXLines(TreeServer* Current)
1253         {
1254                 char data[MAXBUF];
1255                 std::string n = Srv->GetServerName();
1256                 const char* sn = n.c_str();
1257                 int iterations = 0;
1258                 /* Yes, these arent too nice looking, but they get the job done */
1259                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++, iterations++)
1260                 {
1261                         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);
1262                         this->WriteLine(data);
1263                 }
1264                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++, iterations++)
1265                 {
1266                         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);
1267                         this->WriteLine(data);
1268                 }
1269                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++, iterations++)
1270                 {
1271                         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);
1272                         this->WriteLine(data);
1273                 }
1274                 for (std::vector<ELine>::iterator i = elines.begin(); i != elines.end(); i++, iterations++)
1275                 {
1276                         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);
1277                         this->WriteLine(data);
1278                 }
1279                 for (std::vector<ZLine>::iterator i = pzlines.begin(); i != pzlines.end(); i++, iterations++)
1280                 {
1281                         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);
1282                         this->WriteLine(data);
1283                 }
1284                 for (std::vector<QLine>::iterator i = pqlines.begin(); i != pqlines.end(); i++, iterations++)
1285                 {
1286                         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);
1287                         this->WriteLine(data);
1288                 }
1289                 for (std::vector<GLine>::iterator i = pglines.begin(); i != pglines.end(); i++, iterations++)
1290                 {
1291                         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);
1292                         this->WriteLine(data);
1293                 }
1294                 for (std::vector<ELine>::iterator i = pelines.begin(); i != pelines.end(); i++, iterations++)
1295                 {
1296                         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);
1297                         this->WriteLine(data);
1298                 }
1299         }
1300
1301         /* Send channel modes and topics */
1302         void SendChannelModes(TreeServer* Current)
1303         {
1304                 char data[MAXBUF];
1305                 std::deque<std::string> list;
1306                 int iterations = 0;
1307                 std::string n = Srv->GetServerName();
1308                 const char* sn = n.c_str();
1309                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++, iterations++)
1310                 {
1311                         SendFJoins(Current, c->second);
1312                         snprintf(data,MAXBUF,":%s FMODE %s +%s",sn,c->second->name,chanmodes(c->second,true));
1313                         this->WriteLine(data);
1314                         if (*c->second->topic)
1315                         {
1316                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1317                                 this->WriteLine(data);
1318                         }
1319                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
1320                         {
1321                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",sn,c->second->name,b->data);
1322                                 this->WriteLine(data);
1323                         }
1324                         FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1325                         list.clear();
1326                         c->second->GetExtList(list);
1327                         for (unsigned int j = 0; j < list.size(); j++)
1328                         {
1329                                 FOREACH_MOD(I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1330                         }
1331                 }
1332         }
1333
1334         /* send all users and their oper state/modes */
1335         void SendUsers(TreeServer* Current)
1336         {
1337                 char data[MAXBUF];
1338                 std::deque<std::string> list;
1339                 int iterations = 0;
1340                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++, iterations++)
1341                 {
1342                         if (u->second->registered == 7)
1343                         {
1344                                 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(),inet_ntoa(u->second->ip4),u->second->fullname);
1345                                 this->WriteLine(data);
1346                                 if (*u->second->oper)
1347                                 {
1348                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1349                                 }
1350                                 if (*u->second->awaymsg)
1351                                 {
1352                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1353                                 }
1354                                 FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1355                                 list.clear();
1356                                 u->second->GetExtList(list);
1357                                 for (unsigned int j = 0; j < list.size(); j++)
1358                                 {
1359                                         FOREACH_MOD(I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1360                                 }
1361                         }
1362                 }
1363         }
1364
1365         /* This function is called when we want to send a netburst to a local
1366          * server. There is a set order we must do this, because for example
1367          * users require their servers to exist, and channels require their
1368          * users to exist. You get the idea.
1369          */
1370         void DoBurst(TreeServer* s)
1371         {
1372                 /* The calls here to ServerInstance-> yield the processing
1373                  * back to the core so that a large burst is split into at least 6 sections
1374                  * (possibly more)
1375                  */
1376                 std::string burst = "BURST "+ConvToStr(time(NULL));
1377                 std::string endburst = "ENDBURST";
1378                 // Because by the end of the netburst, it  could be gone!
1379                 std::string name = s->GetName();
1380                 Srv->SendOpers("*** Bursting to \2"+name+"\2.");
1381                 this->WriteLine(burst);
1382                 /* send our version string */
1383                 this->WriteLine(":"+Srv->GetServerName()+" VERSION :"+Srv->GetVersion());
1384                 /* Send server tree */
1385                 this->SendServers(TreeRoot,s,1);
1386                 /* Send users and their oper status */
1387                 this->SendUsers(s);
1388                 /* Send everything else (channel modes, xlines etc) */
1389                 this->SendChannelModes(s);
1390                 this->SendXLines(s);
1391                 FOREACH_MOD(I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1392                 this->WriteLine(endburst);
1393                 Srv->SendOpers("*** Finished bursting to \2"+name+"\2.");
1394         }
1395
1396         /* This function is called when we receive data from a remote
1397          * server. We buffer the data in a std::string (it doesnt stay
1398          * there for long), reading using InspSocket::Read() which can
1399          * read up to 16 kilobytes in one operation.
1400          *
1401          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1402          * THE SOCKET OBJECT FOR US.
1403          */
1404         virtual bool OnDataReady()
1405         {
1406                 char* data = this->Read();
1407                 /* Check that the data read is a valid pointer and it has some content */
1408                 if (data && *data)
1409                 {
1410                         this->in_buffer.append(data);
1411                         /* While there is at least one new line in the buffer,
1412                          * do something useful (we hope!) with it.
1413                          */
1414                         while (in_buffer.find("\n") != std::string::npos)
1415                         {
1416                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1417                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1418                                 if (ret.find("\r") != std::string::npos)
1419                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1420                                 /* Process this one, abort if it
1421                                  * didnt return true.
1422                                  */
1423                                 if (this->ctx_in)
1424                                 {
1425                                         char out[1024];
1426                                         char result[1024];
1427                                         memset(result,0,1024);
1428                                         memset(out,0,1024);
1429                                         log(DEBUG,"Original string '%s'",ret.c_str());
1430                                         /* ERROR + CAPAB is still allowed unencryped */
1431                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1432                                         {
1433                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1434                                                 if ((nbytes > 0) && (nbytes < 1024))
1435                                                 {
1436                                                         log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1437                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1438                                                         for (int t = 0; t < nbytes; t++)
1439                                                                 if (result[t] == '\7') result[t] = 0;
1440                                                         ret = result;
1441                                                 }
1442                                         }
1443                                 }
1444                                 if (!this->ProcessLine(ret))
1445                                 {
1446                                         log(DEBUG,"ProcessLine says no!");
1447                                         return false;
1448                                 }
1449                         }
1450                         return true;
1451                 }
1452                 /* EAGAIN returns an empty but non-NULL string, so this
1453                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1454                  */
1455                 return (data && !*data);
1456         }
1457
1458         int WriteLine(std::string line)
1459         {
1460                 log(DEBUG,"OUT: %s",line.c_str());
1461                 if (this->ctx_out)
1462                 {
1463                         char result[10240];
1464                         char result64[10240];
1465                         if (this->keylength)
1466                         {
1467                                 // pad it to the key length
1468                                 int n = this->keylength - (line.length() % this->keylength);
1469                                 if (n)
1470                                 {
1471                                         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);
1472                                         line.append(n,'\7');
1473                                 }
1474                         }
1475                         unsigned int ll = line.length();
1476                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
1477                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
1478                         line = result64;
1479                         //int from64tobits(char *out, const char *in, int maxlen);
1480                 }
1481                 return this->Write(line + "\r\n");
1482         }
1483
1484         /* Handle ERROR command */
1485         bool Error(std::deque<std::string> &params)
1486         {
1487                 if (params.size() < 1)
1488                         return false;
1489                 WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
1490                 /* we will return false to cause the socket to close. */
1491                 return false;
1492         }
1493
1494         /* Because the core won't let users or even SERVERS set +o,
1495          * we use the OPERTYPE command to do this.
1496          */
1497         bool OperType(std::string prefix, std::deque<std::string> &params)
1498         {
1499                 if (params.size() != 1)
1500                 {
1501                         log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
1502                         return true;
1503                 }
1504                 std::string opertype = params[0];
1505                 userrec* u = Srv->FindNick(prefix);
1506                 if (u)
1507                 {
1508                         u->modes[UM_OPERATOR] = 1;
1509                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
1510                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
1511                 }
1512                 return true;
1513         }
1514
1515         /* Because Andy insists that services-compatible servers must
1516          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
1517          */
1518         bool ForceNick(std::string prefix, std::deque<std::string> &params)
1519         {
1520                 if (params.size() < 3)
1521                         return true;
1522
1523                 userrec* u = Srv->FindNick(params[0]);
1524
1525                 if (u)
1526                 {
1527                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
1528                         if (IS_LOCAL(u))
1529                         {
1530                                 std::deque<std::string> par;
1531                                 par.push_back(params[1]);
1532                                 /* This is not required as one is sent in OnUserPostNick below
1533                                  */
1534                                 //DoOneToMany(u->nick,"NICK",par);
1535                                 Srv->ChangeUserNick(u,params[1]);
1536                                 u->age = atoi(params[2].c_str());
1537                         }
1538                 }
1539                 return true;
1540         }
1541
1542         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
1543         {
1544                 if (params.size() < 2)
1545                         return true;
1546
1547                 userrec* u = Srv->FindNick(params[0]);
1548
1549                 if (u)
1550                 {
1551                         Srv->JoinUserToChannel(u,params[1],"");
1552                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
1553                 }
1554                 return true;
1555         }
1556
1557         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
1558         {
1559                 if (params.size() < 1)
1560                         return false;
1561
1562                 std::string servermask = params[0];
1563
1564                 if (Srv->MatchText(Srv->GetServerName(),servermask))
1565                 {
1566                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
1567                         Srv->RehashServer();
1568                         ReadConfiguration(false);
1569                 }
1570                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
1571                 return true;
1572         }
1573
1574         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
1575         {
1576                 if (params.size() != 2)
1577                         return true;
1578
1579                 std::string nick = params[0];
1580                 userrec* u = Srv->FindNick(prefix);
1581                 userrec* who = Srv->FindNick(nick);
1582
1583                 if (who)
1584                 {
1585                         /* Prepend kill source, if we don't have one */
1586                         std::string sourceserv = prefix;
1587                         if (u)
1588                         {
1589                                 sourceserv = u->server;
1590                         }
1591                         if (*(params[1].c_str()) != '[')
1592                         {
1593                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
1594                         }
1595                         std::string reason = params[1];
1596                         params[1] = ":" + params[1];
1597                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
1598                         ::Write(who->fd, ":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
1599                         Srv->QuitUser(who,reason);
1600                 }
1601                 return true;
1602         }
1603
1604         bool LocalPong(std::string prefix, std::deque<std::string> &params)
1605         {
1606                 if (params.size() < 1)
1607                         return true;
1608
1609                 if (params.size() == 1)
1610                 {
1611                         TreeServer* ServerSource = FindServer(prefix);
1612                         if (ServerSource)
1613                         {
1614                                 ServerSource->SetPingFlag();
1615                         }
1616                 }
1617                 else
1618                 {
1619                         std::string forwardto = params[1];
1620                         if (forwardto == Srv->GetServerName())
1621                         {
1622                                 /*
1623                                  * this is a PONG for us
1624                                  * if the prefix is a user, check theyre local, and if they are,
1625                                  * dump the PONG reply back to their fd. If its a server, do nowt.
1626                                  * Services might want to send these s->s, but we dont need to yet.
1627                                  */
1628                                 userrec* u = Srv->FindNick(prefix);
1629
1630                                 if (u)
1631                                 {
1632                                         WriteServ(u->fd,"PONG %s %s",params[0].c_str(),params[1].c_str());
1633                                 }
1634                         }
1635                         else
1636                         {
1637                                 // not for us, pass it on :)
1638                                 DoOneToOne(prefix,"PONG",params,forwardto);
1639                         }
1640                 }
1641
1642                 return true;
1643         }
1644
1645         bool MetaData(std::string prefix, std::deque<std::string> &params)
1646         {
1647                 if (params.size() < 3)
1648                         return true;
1649
1650                 TreeServer* ServerSource = FindServer(prefix);
1651
1652                 if (ServerSource)
1653                 {
1654                         if (params[0] == "*")
1655                         {
1656                                 FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
1657                         }
1658                         else if (*(params[0].c_str()) == '#')
1659                         {
1660                                 chanrec* c = Srv->FindChannel(params[0]);
1661                                 if (c)
1662                                 {
1663                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
1664                                 }
1665                         }
1666                         else if (*(params[0].c_str()) != '#')
1667                         {
1668                                 userrec* u = Srv->FindNick(params[0]);
1669                                 if (u)
1670                                 {
1671                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
1672                                 }
1673                         }
1674                 }
1675
1676                 params[2] = ":" + params[2];
1677                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
1678                 return true;
1679         }
1680
1681         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
1682         {
1683                 if (params.size() < 1)
1684                         return true;
1685
1686                 TreeServer* ServerSource = FindServer(prefix);
1687
1688                 if (ServerSource)
1689                 {
1690                         ServerSource->SetVersion(params[0]);
1691                 }
1692                 params[0] = ":" + params[0];
1693                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
1694                 return true;
1695         }
1696
1697         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
1698         {
1699                 if (params.size() < 1)
1700                         return true;
1701
1702                 userrec* u = Srv->FindNick(prefix);
1703
1704                 if (u)
1705                 {
1706                         Srv->ChangeHost(u,params[0]);
1707                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
1708                 }
1709                 return true;
1710         }
1711
1712         bool AddLine(std::string prefix, std::deque<std::string> &params)
1713         {
1714                 if (params.size() < 6)
1715                         return true;
1716
1717                 bool propogate = false;
1718
1719                 switch (*(params[0].c_str()))
1720                 {
1721                         case 'Z':
1722                                 propogate = add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1723                                 zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1724                         break;
1725                         case 'Q':
1726                                 propogate = add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1727                                 qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1728                         break;
1729                         case 'E':
1730                                 propogate = add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1731                                 eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1732                         break;
1733                         case 'G':
1734                                 propogate = add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1735                                 gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1736                         break;
1737                         case 'K':
1738                                 propogate = add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1739                         break;
1740                         default:
1741                                 /* Just in case... */
1742                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
1743                                 propogate = false;
1744                         break;
1745                 }
1746
1747                 /* Send it on its way */
1748                 if (propogate)
1749                 {
1750                         if (atoi(params[4].c_str()))
1751                         {
1752                                 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());
1753                         }
1754                         else
1755                         {
1756                                 WriteOpers("*** %s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
1757                         }
1758                         params[5] = ":" + params[5];
1759                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
1760                 }
1761                 if (!this->bursting)
1762                 {
1763                         log(DEBUG,"Applying lines...");
1764                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
1765                 }
1766                 return true;
1767         }
1768
1769         bool ChangeName(std::string prefix, std::deque<std::string> &params)
1770         {
1771                 if (params.size() < 1)
1772                         return true;
1773
1774                 userrec* u = Srv->FindNick(prefix);
1775
1776                 if (u)
1777                 {
1778                         Srv->ChangeGECOS(u,params[0]);
1779                         params[0] = ":" + params[0];
1780                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
1781                 }
1782                 return true;
1783         }
1784
1785         bool Whois(std::string prefix, std::deque<std::string> &params)
1786         {
1787                 if (params.size() < 1)
1788                         return true;
1789
1790                 log(DEBUG,"In IDLE command");
1791                 userrec* u = Srv->FindNick(prefix);
1792
1793                 if (u)
1794                 {
1795                         log(DEBUG,"USER EXISTS: %s",u->nick);
1796                         // an incoming request
1797                         if (params.size() == 1)
1798                         {
1799                                 userrec* x = Srv->FindNick(params[0]);
1800                                 if ((x) && (x->fd > -1))
1801                                 {
1802                                         userrec* x = Srv->FindNick(params[0]);
1803                                         log(DEBUG,"Got IDLE");
1804                                         char signon[MAXBUF];
1805                                         char idle[MAXBUF];
1806                                         log(DEBUG,"Sending back IDLE 3");
1807                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
1808                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
1809                                         std::deque<std::string> par;
1810                                         par.push_back(prefix);
1811                                         par.push_back(signon);
1812                                         par.push_back(idle);
1813                                         // ours, we're done, pass it BACK
1814                                         DoOneToOne(params[0],"IDLE",par,u->server);
1815                                 }
1816                                 else
1817                                 {
1818                                         // not ours pass it on
1819                                         DoOneToOne(prefix,"IDLE",params,x->server);
1820                                 }
1821                         }
1822                         else if (params.size() == 3)
1823                         {
1824                                 std::string who_did_the_whois = params[0];
1825                                 userrec* who_to_send_to = Srv->FindNick(who_did_the_whois);
1826                                 if ((who_to_send_to) && (who_to_send_to->fd > -1))
1827                                 {
1828                                         log(DEBUG,"Got final IDLE");
1829                                         // an incoming reply to a whois we sent out
1830                                         std::string nick_whoised = prefix;
1831                                         unsigned long signon = atoi(params[1].c_str());
1832                                         unsigned long idle = atoi(params[2].c_str());
1833                                         if ((who_to_send_to) && (who_to_send_to->fd > -1))
1834                                                 do_whois(who_to_send_to,u,signon,idle,nick_whoised.c_str());
1835                                 }
1836                                 else
1837                                 {
1838                                         // not ours, pass it on
1839                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
1840                                 }
1841                         }
1842                 }
1843                 return true;
1844         }
1845
1846         bool Push(std::string prefix, std::deque<std::string> &params)
1847         {
1848                 if (params.size() < 2)
1849                         return true;
1850
1851                 userrec* u = Srv->FindNick(params[0]);
1852
1853                 if (!u)
1854                         return true;
1855
1856                 if (IS_LOCAL(u))
1857                 {
1858                         // push the raw to the user
1859                         if (Srv->IsUlined(prefix))
1860                         {
1861                                 ::Write(u->fd,"%s",params[1].c_str());
1862                         }
1863                         else
1864                         {
1865                                 log(DEBUG,"PUSH from non-ulined server dropped into the bit-bucket:  :%s PUSH %s :%s",prefix.c_str(),params[0].c_str(),params[1].c_str());
1866                         }
1867                 }
1868                 else
1869                 {
1870                         // continue the raw onwards
1871                         params[1] = ":" + params[1];
1872                         DoOneToOne(prefix,"PUSH",params,u->server);
1873                 }
1874                 return true;
1875         }
1876
1877         bool Time(std::string prefix, std::deque<std::string> &params)
1878         {
1879                 // :source.server TIME remote.server sendernick
1880                 // :remote.server TIME source.server sendernick TS
1881                 if (params.size() == 2)
1882                 {
1883                         // someone querying our time?
1884                         if (Srv->GetServerName() == params[0])
1885                         {
1886                                 userrec* u = Srv->FindNick(params[1]);
1887                                 if (u)
1888                                 {
1889                                         char curtime[256];
1890                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
1891                                         params.push_back(curtime);
1892                                         params[0] = prefix;
1893                                         DoOneToOne(Srv->GetServerName(),"TIME",params,params[0]);
1894                                 }
1895                         }
1896                         else
1897                         {
1898                                 // not us, pass it on
1899                                 userrec* u = Srv->FindNick(params[1]);
1900                                 if (u)
1901                                         DoOneToOne(prefix,"TIME",params,params[0]);
1902                         }
1903                 }
1904                 else if (params.size() == 3)
1905                 {
1906                         // a response to a previous TIME
1907                         userrec* u = Srv->FindNick(params[1]);
1908                         if ((u) && (IS_LOCAL(u)))
1909                         {
1910                         time_t rawtime = atol(params[2].c_str());
1911                         struct tm * timeinfo;
1912                         timeinfo = localtime(&rawtime);
1913                                 char tms[26];
1914                                 snprintf(tms,26,"%s",asctime(timeinfo));
1915                                 tms[24] = 0;
1916                         WriteServ(u->fd,"391 %s %s :%s",u->nick,prefix.c_str(),tms);
1917                         }
1918                         else
1919                         {
1920                                 if (u)
1921                                         DoOneToOne(prefix,"TIME",params,u->server);
1922                         }
1923                 }
1924                 return true;
1925         }
1926
1927         bool LocalPing(std::string prefix, std::deque<std::string> &params)
1928         {
1929                 if (params.size() < 1)
1930                         return true;
1931
1932                 if (params.size() == 1)
1933                 {
1934                         std::string stufftobounce = params[0];
1935                         this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
1936                         return true;
1937                 }
1938                 else
1939                 {
1940                         std::string forwardto = params[1];
1941                         if (forwardto == Srv->GetServerName())
1942                         {
1943                                 // this is a ping for us, send back PONG to the requesting server
1944                                 params[1] = params[0];
1945                                 params[0] = forwardto;
1946                                 DoOneToOne(forwardto,"PONG",params,params[1]);
1947                         }
1948                         else
1949                         {
1950                                 // not for us, pass it on :)
1951                                 DoOneToOne(prefix,"PING",params,forwardto);
1952                         }
1953                         return true;
1954                 }
1955         }
1956
1957         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
1958         {
1959                 if (params.size() < 4)
1960                         return false;
1961
1962                 std::string servername = params[0];
1963                 std::string password = params[1];
1964                 // hopcount is not used for a remote server, we calculate this ourselves
1965                 std::string description = params[3];
1966                 TreeServer* ParentOfThis = FindServer(prefix);
1967
1968                 if (!ParentOfThis)
1969                 {
1970                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
1971                         return false;
1972                 }
1973                 TreeServer* CheckDupe = FindServer(servername);
1974                 if (CheckDupe)
1975                 {
1976                         this->WriteLine("ERROR :Server "+servername+" already exists!");
1977                         Srv->SendOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
1978                         return false;
1979                 }
1980                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
1981                 ParentOfThis->AddChild(Node);
1982                 params[3] = ":" + params[3];
1983                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
1984                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
1985                 return true;
1986         }
1987
1988         bool Outbound_Reply_Server(std::deque<std::string> &params)
1989         {
1990                 if (params.size() < 4)
1991                         return false;
1992
1993                 irc::string servername = params[0].c_str();
1994                 std::string sname = params[0];
1995                 std::string password = params[1];
1996                 int hops = atoi(params[2].c_str());
1997
1998                 if (hops)
1999                 {
2000                         this->WriteLine("ERROR :Server too far away for authentication");
2001                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2002                         return false;
2003                 }
2004                 std::string description = params[3];
2005                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2006                 {
2007                         if ((x->Name == servername) && (x->RecvPass == password))
2008                         {
2009                                 TreeServer* CheckDupe = FindServer(sname);
2010                                 if (CheckDupe)
2011                                 {
2012                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2013                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2014                                         return false;
2015                                 }
2016                                 // Begin the sync here. this kickstarts the
2017                                 // other side, waiting in WAIT_AUTH_2 state,
2018                                 // into starting their burst, as it shows
2019                                 // that we're happy.
2020                                 this->LinkState = CONNECTED;
2021                                 // we should add the details of this server now
2022                                 // to the servers tree, as a child of the root
2023                                 // node.
2024                                 TreeServer* Node = new TreeServer(sname,description,TreeRoot,this);
2025                                 TreeRoot->AddChild(Node);
2026                                 params[3] = ":" + params[3];
2027                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2028                                 this->bursting = true;
2029                                 this->DoBurst(Node);
2030                                 return true;
2031                         }
2032                 }
2033                 this->WriteLine("ERROR :Invalid credentials");
2034                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2035                 return false;
2036         }
2037
2038         bool Inbound_Server(std::deque<std::string> &params)
2039         {
2040                 if (params.size() < 4)
2041                         return false;
2042
2043                 irc::string servername = params[0].c_str();
2044                 std::string sname = params[0];
2045                 std::string password = params[1];
2046                 int hops = atoi(params[2].c_str());
2047
2048                 if (hops)
2049                 {
2050                         this->WriteLine("ERROR :Server too far away for authentication");
2051                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2052                         return false;
2053                 }
2054                 std::string description = params[3];
2055                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2056                 {
2057                         if ((x->Name == servername) && (x->RecvPass == password))
2058                         {
2059                                 TreeServer* CheckDupe = FindServer(sname);
2060                                 if (CheckDupe)
2061                                 {
2062                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2063                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2064                                         return false;
2065                                 }
2066                                 /* If the config says this link is encrypted, but the remote side
2067                                  * hasnt bothered to send the AES command before SERVER, then we
2068                                  * boot them off as we MUST have this connection encrypted.
2069                                  */
2070                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2071                                 {
2072                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2073                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2074                                         return false;
2075                                 }
2076                                 Srv->SendOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2077                                 this->InboundServerName = sname;
2078                                 this->InboundDescription = description;
2079                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2080                                 // along with the sendpass from this block.
2081                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
2082                                 // move to the next state, we are now waiting for THEM.
2083                                 this->LinkState = WAIT_AUTH_2;
2084                                 return true;
2085                         }
2086                 }
2087                 this->WriteLine("ERROR :Invalid credentials");
2088                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2089                 return false;
2090         }
2091
2092         void Split(std::string line, bool stripcolon, std::deque<std::string> &n)
2093         {
2094                 // we don't do anything with a line > 2048
2095                 if (line.length() > 2048)
2096                 {
2097                         log(DEBUG,"Line too long!");
2098                         return;
2099                 }
2100                 if (!strchr(line.c_str(),' '))
2101                 {
2102                         n.push_back(line);
2103                         return;
2104                 }
2105                 std::stringstream s(line);
2106                 int count = 0;
2107                 char param[1024];
2108                 char* pptr = param;
2109
2110                 n.clear();
2111                 int item = 0;
2112                 while (!s.eof())
2113                 {
2114                         char c = 0;
2115                         s.get(c);
2116                         if (c == ' ')
2117                         {
2118                                 *pptr = 0;
2119                                 if (*param)
2120                                         n.push_back(param);
2121                                 *param = count = 0;
2122                                 pptr = param;
2123                                 item++;
2124                         }
2125                         else
2126                         {
2127                                 if (!s.eof())
2128                                 {
2129                                         *pptr++ = c;
2130                                         count++;
2131                                 }
2132                                 if ((*param == ':') && (count == 1) && (item > 0))
2133                                 {
2134                                         *param = count = 0;
2135                                         pptr = param;
2136                                         while (!s.eof())
2137                                         {
2138                                                 s.get(c);
2139                                                 if (!s.eof())
2140                                                 {
2141                                                         *pptr++ = c;
2142                                                         count++;
2143                                                 }
2144                                         }
2145                                         *pptr = 0;
2146                                         n.push_back(param);
2147                                         *param = count = 0;
2148                                         pptr = param;
2149                                 }
2150                         }
2151                 }
2152                 *pptr = 0;
2153                 if (*param)
2154                 {
2155                         n.push_back(param);
2156                 }
2157
2158                 return;
2159         }
2160
2161         bool ProcessLine(std::string line)
2162         {
2163                 std::deque<std::string> params;
2164                 irc::string command;
2165                 std::string prefix;
2166
2167                 if (line.empty())
2168                         return true;
2169
2170                 line = line.substr(0, line.find_first_of("\r\n"));
2171
2172                 log(DEBUG,"IN: %s", line.c_str());
2173
2174                 this->Split(line.c_str(),true,params);
2175
2176                 if ((params[0][0] == ':') && (params.size() > 1))
2177                 {
2178                         prefix = params[0].substr(1);
2179                         params.pop_front();
2180                 }
2181
2182                 command = params[0].c_str();
2183                 params.pop_front();
2184
2185                 if ((!this->ctx_in) && (command == "AES"))
2186                 {
2187                         std::string sserv = params[0];
2188                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2189                         {
2190                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2191                                 {
2192                                         this->InitAES(x->EncryptionKey,sserv);
2193                                 }
2194                         }
2195
2196                         return true;
2197                 }
2198                 else if ((this->ctx_in) && (command == "AES"))
2199                 {
2200                         WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2201                 }
2202
2203                 switch (this->LinkState)
2204                 {
2205                         TreeServer* Node;
2206
2207                         case WAIT_AUTH_1:
2208                                 // Waiting for SERVER command from remote server. Server initiating
2209                                 // the connection sends the first SERVER command, listening server
2210                                 // replies with theirs if its happy, then if the initiator is happy,
2211                                 // it starts to send its net sync, which starts the merge, otherwise
2212                                 // it sends an ERROR.
2213                                 if (command == "PASS")
2214                                 {
2215                                         /* Silently ignored */
2216                                 }
2217                                 else if (command == "SERVER")
2218                                 {
2219                                         return this->Inbound_Server(params);
2220                                 }
2221                                 else if (command == "ERROR")
2222                                 {
2223                                         return this->Error(params);
2224                                 }
2225                                 else if (command == "USER")
2226                                 {
2227                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2228                                         return false;
2229                                 }
2230                                 else if (command == "CAPAB")
2231                                 {
2232                                         return this->Capab(params);
2233                                 }
2234                                 else if ((command == "U") || (command == "S"))
2235                                 {
2236                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2237                                         return false;
2238                                 }
2239                                 else
2240                                 {
2241                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2242                                         return false;
2243                                 }
2244                         break;
2245                         case WAIT_AUTH_2:
2246                                 // Waiting for start of other side's netmerge to say they liked our
2247                                 // password.
2248                                 if (command == "SERVER")
2249                                 {
2250                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2251                                         // silently ignore.
2252                                         return true;
2253                                 }
2254                                 else if ((command == "U") || (command == "S"))
2255                                 {
2256                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2257                                         return false;
2258                                 }
2259                                 else if (command == "BURST")
2260                                 {
2261                                         if (params.size())
2262                                         {
2263                                                 /* If a time stamp is provided, try and check syncronization */
2264                                                 time_t THEM = atoi(params[0].c_str());
2265                                                 long delta = THEM-time(NULL);
2266                                                 if ((delta < -600) || (delta > 600))
2267                                                 {
2268                                                         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));
2269                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2270                                                         return false;
2271                                                 }
2272                                                 else if ((delta < -60) || (delta > 60))
2273                                                 {
2274                                                         WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2275                                                 }
2276                                         }
2277                                         this->LinkState = CONNECTED;
2278                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
2279                                         TreeRoot->AddChild(Node);
2280                                         params.clear();
2281                                         params.push_back(InboundServerName);
2282                                         params.push_back("*");
2283                                         params.push_back("1");
2284                                         params.push_back(":"+InboundDescription);
2285                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2286                                         this->bursting = true;
2287                                         this->DoBurst(Node);
2288                                 }
2289                                 else if (command == "ERROR")
2290                                 {
2291                                         return this->Error(params);
2292                                 }
2293                                 else if (command == "CAPAB")
2294                                 {
2295                                         return this->Capab(params);
2296                                 }
2297
2298                         break;
2299                         case LISTENER:
2300                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2301                                 return false;
2302                         break;
2303                         case CONNECTING:
2304                                 if (command == "SERVER")
2305                                 {
2306                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2307                                         // has just sent us their credentials. If we get this far, theyre
2308                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2309                                         // if we're happy with this, we should send our netburst which
2310                                         // kickstarts the merge.
2311                                         return this->Outbound_Reply_Server(params);
2312                                 }
2313                                 else if (command == "ERROR")
2314                                 {
2315                                         return this->Error(params);
2316                                 }
2317                         break;
2318                         case CONNECTED:
2319                                 // This is the 'authenticated' state, when all passwords
2320                                 // have been exchanged and anything past this point is taken
2321                                 // as gospel.
2322
2323                                 if (prefix != "")
2324                                 {
2325                                         std::string direction = prefix;
2326                                         userrec* t = Srv->FindNick(prefix);
2327                                         if (t)
2328                                         {
2329                                                 direction = t->server;
2330                                         }
2331                                         TreeServer* route_back_again = BestRouteTo(direction);
2332                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2333                                         {
2334                                                 if (route_back_again)
2335                                                         log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2336                                                 return true;
2337                                         }
2338
2339                                         /* Fix by brain:
2340                                          * When there is activity on the socket, reset the ping counter so
2341                                          * that we're not wasting bandwidth pinging an active server.
2342                                          */
2343                                         route_back_again->SetNextPingTime(time(NULL) + 120);
2344                                         route_back_again->SetPingFlag();
2345                                 }
2346
2347                                 if (command == "SVSMODE")
2348                                 {
2349                                         /* Services expects us to implement
2350                                          * SVSMODE. In inspircd its the same as
2351                                          * MODE anyway.
2352                                          */
2353                                         command = "MODE";
2354                                 }
2355                                 std::string target = "";
2356                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2357                                  * working with std::string here.
2358                                  */
2359                                 if ((command == "NICK") && (params.size() > 1))
2360                                 {
2361                                         return this->IntroduceClient(prefix,params);
2362                                 }
2363                                 else if (command == "FJOIN")
2364                                 {
2365                                         return this->ForceJoin(prefix,params);
2366                                 }
2367                                 else if (command == "SYNCTS")
2368                                 {
2369                                         return this->SyncChannelTS(prefix,params);
2370                                 }
2371                                 else if (command == "SERVER")
2372                                 {
2373                                         return this->RemoteServer(prefix,params);
2374                                 }
2375                                 else if (command == "ERROR")
2376                                 {
2377                                         return this->Error(params);
2378                                 }
2379                                 else if (command == "OPERTYPE")
2380                                 {
2381                                         return this->OperType(prefix,params);
2382                                 }
2383                                 else if (command == "FMODE")
2384                                 {
2385                                         return this->ForceMode(prefix,params);
2386                                 }
2387                                 else if (command == "KILL")
2388                                 {
2389                                         return this->RemoteKill(prefix,params);
2390                                 }
2391                                 else if (command == "FTOPIC")
2392                                 {
2393                                         return this->ForceTopic(prefix,params);
2394                                 }
2395                                 else if (command == "REHASH")
2396                                 {
2397                                         return this->RemoteRehash(prefix,params);
2398                                 }
2399                                 else if (command == "METADATA")
2400                                 {
2401                                         return this->MetaData(prefix,params);
2402                                 }
2403                                 else if (command == "PING")
2404                                 {
2405                                         /*
2406                                          * We just got a ping from a server that's bursting.
2407                                          * This can't be right, so set them to not bursting, and
2408                                          * apply their lines.
2409                                          */
2410                                         if (this->bursting)
2411                                         {
2412                                                 this->bursting = false;
2413                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2414                                         }
2415                                         if (prefix == "")
2416                                         {
2417                                                 prefix = this->GetName();
2418                                         }
2419                                         return this->LocalPing(prefix,params);
2420                                 }
2421                                 else if (command == "PONG")
2422                                 {
2423                                         /*
2424                                          * We just got a pong from a server that's bursting.
2425                                          * This can't be right, so set them to not bursting, and
2426                                          * apply their lines.
2427                                          */
2428                                         if (this->bursting)
2429                                         {
2430                                                 this->bursting = false;
2431                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2432                                         }
2433                                         if (prefix == "")
2434                                         {
2435                                                 prefix = this->GetName();
2436                                         }
2437                                         return this->LocalPong(prefix,params);
2438                                 }
2439                                 else if (command == "VERSION")
2440                                 {
2441                                         return this->ServerVersion(prefix,params);
2442                                 }
2443                                 else if (command == "FHOST")
2444                                 {
2445                                         return this->ChangeHost(prefix,params);
2446                                 }
2447                                 else if (command == "FNAME")
2448                                 {
2449                                         return this->ChangeName(prefix,params);
2450                                 }
2451                                 else if (command == "ADDLINE")
2452                                 {
2453                                         return this->AddLine(prefix,params);
2454                                 }
2455                                 else if (command == "SVSNICK")
2456                                 {
2457                                         if (prefix == "")
2458                                         {
2459                                                 prefix = this->GetName();
2460                                         }
2461                                         return this->ForceNick(prefix,params);
2462                                 }
2463                                 else if (command == "IDLE")
2464                                 {
2465                                         return this->Whois(prefix,params);
2466                                 }
2467                                 else if (command == "PUSH")
2468                                 {
2469                                         return this->Push(prefix,params);
2470                                 }
2471                                 else if (command == "TIME")
2472                                 {
2473                                         return this->Time(prefix,params);
2474                                 }
2475                                 else if ((command == "KICK") && (IsServer(prefix)))
2476                                 {
2477                                         std::string sourceserv = this->myhost;
2478                                         if (params.size() == 3)
2479                                         {
2480                                                 userrec* user = Srv->FindNick(params[1]);
2481                                                 chanrec* chan = Srv->FindChannel(params[0]);
2482                                                 if (user && chan)
2483                                                 {
2484                                                         server_kick_channel(user,chan,(char*)params[2].c_str(),false);
2485                                                 }
2486                                         }
2487                                         if (this->InboundServerName != "")
2488                                         {
2489                                                 sourceserv = this->InboundServerName;
2490                                         }
2491                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2492                                 }
2493                                 else if (command == "SVSJOIN")
2494                                 {
2495                                         if (prefix == "")
2496                                         {
2497                                                 prefix = this->GetName();
2498                                         }
2499                                         return this->ServiceJoin(prefix,params);
2500                                 }
2501                                 else if (command == "SQUIT")
2502                                 {
2503                                         if (params.size() == 2)
2504                                         {
2505                                                 this->Squit(FindServer(params[0]),params[1]);
2506                                         }
2507                                         return true;
2508                                 }
2509                                 else if (command == "ENDBURST")
2510                                 {
2511                                         this->bursting = false;
2512                                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2513                                         std::string sourceserv = this->myhost;
2514                                         if (this->InboundServerName != "")
2515                                         {
2516                                                 sourceserv = this->InboundServerName;
2517                                         }
2518                                         WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
2519                                         return true;
2520                                 }
2521                                 else
2522                                 {
2523                                         // not a special inter-server command.
2524                                         // Emulate the actual user doing the command,
2525                                         // this saves us having a huge ugly parser.
2526                                         userrec* who = Srv->FindNick(prefix);
2527                                         std::string sourceserv = this->myhost;
2528                                         if (this->InboundServerName != "")
2529                                         {
2530                                                 sourceserv = this->InboundServerName;
2531                                         }
2532                                         if (who)
2533                                         {
2534                                                 if ((command == "NICK") && (params.size() > 0))
2535                                                 {
2536                                                         /* On nick messages, check that the nick doesnt
2537                                                          * already exist here. If it does, kill their copy,
2538                                                          * and our copy.
2539                                                          */
2540                                                         userrec* x = Srv->FindNick(params[0]);
2541                                                         if ((x) && (x != who))
2542                                                         {
2543                                                                 std::deque<std::string> p;
2544                                                                 p.push_back(params[0]);
2545                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
2546                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2547                                                                 p.clear();
2548                                                                 p.push_back(prefix);
2549                                                                 p.push_back("Nickname collision");
2550                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2551                                                                 Srv->QuitUser(x,"Nickname collision ("+prefix+" -> "+params[0]+")");
2552                                                                 userrec* y = Srv->FindNick(prefix);
2553                                                                 if (y)
2554                                                                 {
2555                                                                         Srv->QuitUser(y,"Nickname collision");
2556                                                                 }
2557                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2558                                                         }
2559                                                 }
2560                                                 // its a user
2561                                                 target = who->server;
2562                                                 char* strparams[127];
2563                                                 for (unsigned int q = 0; q < params.size(); q++)
2564                                                 {
2565                                                         strparams[q] = (char*)params[q].c_str();
2566                                                 }
2567                                                 if (!Srv->CallCommandHandler(command.c_str(), strparams, params.size(), who))
2568                                                 {
2569                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
2570                                                         return false;
2571                                                 }
2572                                         }
2573                                         else
2574                                         {
2575                                                 // its not a user. Its either a server, or somethings screwed up.
2576                                                 if (IsServer(prefix))
2577                                                 {
2578                                                         target = Srv->GetServerName();
2579                                                 }
2580                                                 else
2581                                                 {
2582                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
2583                                                         return true;
2584                                                 }
2585                                         }
2586                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2587
2588                                 }
2589                                 return true;
2590                         break;
2591                 }
2592                 return true;
2593         }
2594
2595         virtual std::string GetName()
2596         {
2597                 std::string sourceserv = this->myhost;
2598                 if (this->InboundServerName != "")
2599                 {
2600                         sourceserv = this->InboundServerName;
2601                 }
2602                 return sourceserv;
2603         }
2604
2605         virtual void OnTimeout()
2606         {
2607                 if (this->LinkState == CONNECTING)
2608                 {
2609                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
2610                 }
2611         }
2612
2613         virtual void OnClose()
2614         {
2615                 // Connection closed.
2616                 // If the connection is fully up (state CONNECTED)
2617                 // then propogate a netsplit to all peers.
2618                 std::string quitserver = this->myhost;
2619                 if (this->InboundServerName != "")
2620                 {
2621                         quitserver = this->InboundServerName;
2622                 }
2623                 TreeServer* s = FindServer(quitserver);
2624                 if (s)
2625                 {
2626                         Squit(s,"Remote host closed the connection");
2627                 }
2628                 WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
2629         }
2630
2631         virtual int OnIncomingConnection(int newsock, char* ip)
2632         {
2633                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
2634                  * or discovering if this port is the server port, we don't allow connections from any
2635                  * IPs for which we don't have a link block.
2636                  */
2637                 bool found = false;
2638                 char resolved_host[MAXBUF];
2639                 vector<Link>::iterator i;
2640                 for (i = LinkBlocks.begin(); i != LinkBlocks.end(); i++)
2641                 {
2642                         if (i->IPAddr == ip)
2643                         {
2644                                 found = true;
2645                                 break;
2646                         }
2647                         /* XXX: Fixme: blocks for a very short amount of time,
2648                          * we should cache these on rehash/startup
2649                          */
2650                         if (CleanAndResolve(resolved_host,i->IPAddr.c_str(),true))
2651                         {
2652                                 if (std::string(resolved_host) == ip)
2653                                 {
2654                                         found = true;
2655                                         break;
2656                                 }
2657                         }
2658                 }
2659                 if (!found)
2660                 {
2661                         WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
2662                         close(newsock);
2663                         return false;
2664                 }
2665                 TreeSocket* s = new TreeSocket(newsock, ip);
2666                 Srv->AddSocket(s);
2667                 return true;
2668         }
2669 };
2670
2671 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
2672 {
2673         for (unsigned int c = 0; c < list.size(); c++)
2674         {
2675                 if (list[c] == server)
2676                 {
2677                         return;
2678                 }
2679         }
2680         list.push_back(server);
2681 }
2682
2683 // returns a list of DIRECT servernames for a specific channel
2684 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
2685 {
2686         CUList *ulist = c->GetUsers();
2687         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2688         {
2689                 if (i->second->fd < 0)
2690                 {
2691                         TreeServer* best = BestRouteTo(i->second->server);
2692                         if (best)
2693                                 AddThisServer(best,list);
2694                 }
2695         }
2696         return;
2697 }
2698
2699 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
2700 {
2701         TreeServer* omitroute = BestRouteTo(omit);
2702         if ((command == "NOTICE") || (command == "PRIVMSG"))
2703         {
2704                 if ((params.size() >= 2) && (*(params[0].c_str()) != '$'))
2705                 {
2706                         /* Prefixes */
2707                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
2708                         {
2709                                 params[0] = params[0].substr(1, params[0].length()-1);
2710                         }
2711                         if (*(params[0].c_str()) != '#')
2712                         {
2713                                 // special routing for private messages/notices
2714                                 userrec* d = Srv->FindNick(params[0]);
2715                                 if (d)
2716                                 {
2717                                         std::deque<std::string> par;
2718                                         par.push_back(params[0]);
2719                                         par.push_back(":"+params[1]);
2720                                         DoOneToOne(prefix,command.c_str(),par,d->server);
2721                                         return true;
2722                                 }
2723                         }
2724                         else
2725                         {
2726                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
2727                                 chanrec* c = Srv->FindChannel(params[0]);
2728                                 if (c)
2729                                 {
2730                                         std::deque<TreeServer*> list;
2731                                         GetListOfServersForChannel(c,list);
2732                                         log(DEBUG,"Got a list of %d servers",list.size());
2733                                         unsigned int lsize = list.size();
2734                                         for (unsigned int i = 0; i < lsize; i++)
2735                                         {
2736                                                 TreeSocket* Sock = list[i]->GetSocket();
2737                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
2738                                                 {
2739                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
2740                                                         Sock->WriteLine(data);
2741                                                 }
2742                                         }
2743                                         return true;
2744                                 }
2745                         }
2746                 }
2747         }
2748         unsigned int items = TreeRoot->ChildCount();
2749         for (unsigned int x = 0; x < items; x++)
2750         {
2751                 TreeServer* Route = TreeRoot->GetChild(x);
2752                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
2753                 {
2754                         TreeSocket* Sock = Route->GetSocket();
2755                         Sock->WriteLine(data);
2756                 }
2757         }
2758         return true;
2759 }
2760
2761 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
2762 {
2763         TreeServer* omitroute = BestRouteTo(omit);
2764         std::string FullLine = ":" + prefix + " " + command;
2765         unsigned int words = params.size();
2766         for (unsigned int x = 0; x < words; x++)
2767         {
2768                 FullLine = FullLine + " " + params[x];
2769         }
2770         unsigned int items = TreeRoot->ChildCount();
2771         for (unsigned int x = 0; x < items; x++)
2772         {
2773                 TreeServer* Route = TreeRoot->GetChild(x);
2774                 // Send the line IF:
2775                 // The route has a socket (its a direct connection)
2776                 // The route isnt the one to be omitted
2777                 // The route isnt the path to the one to be omitted
2778                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
2779                 {
2780                         TreeSocket* Sock = Route->GetSocket();
2781                         Sock->WriteLine(FullLine);
2782                 }
2783         }
2784         return true;
2785 }
2786
2787 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
2788 {
2789         std::string FullLine = ":" + prefix + " " + command;
2790         unsigned int words = params.size();
2791         for (unsigned int x = 0; x < words; x++)
2792         {
2793                 FullLine = FullLine + " " + params[x];
2794         }
2795         unsigned int items = TreeRoot->ChildCount();
2796         for (unsigned int x = 0; x < items; x++)
2797         {
2798                 TreeServer* Route = TreeRoot->GetChild(x);
2799                 if (Route->GetSocket())
2800                 {
2801                         TreeSocket* Sock = Route->GetSocket();
2802                         Sock->WriteLine(FullLine);
2803                 }
2804         }
2805         return true;
2806 }
2807
2808 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
2809 {
2810         TreeServer* Route = BestRouteTo(target);
2811         if (Route)
2812         {
2813                 std::string FullLine = ":" + prefix + " " + command;
2814                 unsigned int words = params.size();
2815                 for (unsigned int x = 0; x < words; x++)
2816                 {
2817                         FullLine = FullLine + " " + params[x];
2818                 }
2819                 if (Route->GetSocket())
2820                 {
2821                         TreeSocket* Sock = Route->GetSocket();
2822                         Sock->WriteLine(FullLine);
2823                 }
2824                 return true;
2825         }
2826         else
2827         {
2828                 return true;
2829         }
2830 }
2831
2832 std::vector<TreeSocket*> Bindings;
2833
2834 void ReadConfiguration(bool rebind)
2835 {
2836         Conf = new ConfigReader;
2837         if (rebind)
2838         {
2839                 for (int j =0; j < Conf->Enumerate("bind"); j++)
2840                 {
2841                         std::string Type = Conf->ReadValue("bind","type",j);
2842                         std::string IP = Conf->ReadValue("bind","address",j);
2843                         long Port = Conf->ReadInteger("bind","port",j,true);
2844                         if (Type == "servers")
2845                         {
2846                                 if (IP == "*")
2847                                 {
2848                                         IP = "";
2849                                 }
2850                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
2851                                 if (listener->GetState() == I_LISTENING)
2852                                 {
2853                                         Srv->AddSocket(listener);
2854                                         Bindings.push_back(listener);
2855                                 }
2856                                 else
2857                                 {
2858                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
2859                                         listener->Close();
2860                                         DELETE(listener);
2861                                 }
2862                         }
2863                 }
2864         }
2865         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
2866         HideULines = Conf->ReadFlag("options","hideulines",0);
2867         LinkBlocks.clear();
2868         for (int j =0; j < Conf->Enumerate("link"); j++)
2869         {
2870                 Link L;
2871                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
2872                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
2873                 L.Port = Conf->ReadInteger("link","port",j,true);
2874                 L.SendPass = Conf->ReadValue("link","sendpass",j);
2875                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
2876                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
2877                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
2878                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
2879                 L.NextConnectTime = time(NULL) + L.AutoConnect;
2880                 /* Bugfix by brain, do not allow people to enter bad configurations */
2881                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
2882                 {
2883                         LinkBlocks.push_back(L);
2884                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
2885                 }
2886                 else
2887                 {
2888                         if (L.IPAddr == "")
2889                         {
2890                                 log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
2891                         }
2892                         else if (L.RecvPass == "")
2893                         {
2894                                 log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
2895                         }
2896                         else if (L.SendPass == "")
2897                         {
2898                                 log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
2899                         }
2900                         else if (L.Name == "")
2901                         {
2902                                 log(DEFAULT,"Invalid configuration, link tag without a name!");
2903                         }
2904                         else if (!L.Port)
2905                         {
2906                                 log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
2907                         }
2908                 }
2909         }
2910         DELETE(Conf);
2911 }
2912
2913
2914 class ModuleSpanningTree : public Module
2915 {
2916         std::vector<TreeSocket*> Bindings;
2917         int line;
2918         int NumServers;
2919         unsigned int max_local;
2920         unsigned int max_global;
2921         cmd_rconnect* command_rconnect;
2922
2923  public:
2924
2925         ModuleSpanningTree(Server* Me)
2926                 : Module::Module(Me), max_local(0), max_global(0)
2927         {
2928                 Srv = Me;
2929                 Bindings.clear();
2930
2931                 // Create the root of the tree
2932                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
2933
2934                 ReadConfiguration(true);
2935
2936                 command_rconnect = new cmd_rconnect(this);
2937                 Srv->AddCommand(command_rconnect);
2938         }
2939
2940         void ShowLinks(TreeServer* Current, userrec* user, int hops)
2941         {
2942                 std::string Parent = TreeRoot->GetName();
2943                 if (Current->GetParent())
2944                 {
2945                         Parent = Current->GetParent()->GetName();
2946                 }
2947                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
2948                 {
2949                         if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
2950                         {
2951                                 if (*user->oper)
2952                                 {
2953                                          ShowLinks(Current->GetChild(q),user,hops+1);
2954                                 }
2955                         }
2956                         else
2957                         {
2958                                 ShowLinks(Current->GetChild(q),user,hops+1);
2959                         }
2960                 }
2961                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
2962                 if ((HideULines) && (Srv->IsUlined(Current->GetName())) && (!*user->oper))
2963                         return;
2964                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(FlatLinks && (!*user->oper)) ? Srv->GetServerName().c_str() : Parent.c_str(),(FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
2965         }
2966
2967         int CountLocalServs()
2968         {
2969                 return TreeRoot->ChildCount();
2970         }
2971
2972         int CountServs()
2973         {
2974                 return serverlist.size();
2975         }
2976
2977         void HandleLinks(char** parameters, int pcnt, userrec* user)
2978         {
2979                 ShowLinks(TreeRoot,user,0);
2980                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
2981                 return;
2982         }
2983
2984         void HandleLusers(char** parameters, int pcnt, userrec* user)
2985         {
2986                 unsigned int n_users = usercnt();
2987
2988                 /* Only update these when someone wants to see them, more efficient */
2989                 if ((unsigned int)local_count() > max_local)
2990                         max_local = local_count();
2991                 if (n_users > max_global)
2992                         max_global = n_users;
2993
2994                 WriteServ(user->fd,"251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-usercount_invisible(),usercount_invisible(),this->CountServs());
2995                 WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
2996                 WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
2997                 WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
2998                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
2999                 WriteServ(user->fd,"265 %s :Current Local Users: %d  Max: %d",user->nick,local_count(),max_local);
3000                 WriteServ(user->fd,"266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3001                 return;
3002         }
3003
3004         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3005
3006         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3007         {
3008                 if (line < 128)
3009                 {
3010                         for (int t = 0; t < depth; t++)
3011                         {
3012                                 matrix[line][t] = ' ';
3013                         }
3014
3015                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3016                         // a 'Spacer' String to compensate.
3017                         char spacer[40];
3018
3019                         memset(spacer,' ',40);
3020                         if ((40 - Current->GetName().length() - depth) > 1) {
3021                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3022                         }
3023                         else
3024                         {
3025                                 spacer[5] = '\0';
3026                         }
3027
3028                         float percent;
3029                         char text[80];
3030                         if (clientlist.size() == 0) {
3031                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3032                                 percent = 0;
3033                         }
3034                         else
3035                         {
3036                                 percent = ((float)Current->GetUserCount() / (float)clientlist.size()) * 100;
3037                         }
3038                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3039                         totusers += Current->GetUserCount();
3040                         totservers++;
3041                         strlcpy(&matrix[line][depth],text,80);
3042                         line++;
3043                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3044                         {
3045                                 if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3046                                 {
3047                                         if (*user->oper)
3048                                         {
3049                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3050                                         }
3051                                 }
3052                                 else
3053                                 {
3054                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3055                                 }
3056                         }
3057                 }
3058         }
3059
3060         // Ok, prepare to be confused.
3061         // After much mulling over how to approach this, it struck me that
3062         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3063         // keeping track of a ton of ascii characters, and line by line
3064         // under recursion working out where to place them using multiplications
3065         // and divisons, we instead render the map onto a backplane of characters
3066         // (a character matrix), then draw the branches as a series of "L" shapes
3067         // from the nodes. This is not only friendlier on CPU it uses less stack.
3068
3069         void HandleMap(char** parameters, int pcnt, userrec* user)
3070         {
3071                 // This array represents a virtual screen which we will
3072                 // "scratch" draw to, as the console device of an irc
3073                 // client does not provide for a proper terminal.
3074                 float totusers = 0;
3075                 float totservers = 0;
3076                 char matrix[128][80];
3077                 for (unsigned int t = 0; t < 128; t++)
3078                 {
3079                         matrix[t][0] = '\0';
3080                 }
3081                 line = 0;
3082                 // The only recursive bit is called here.
3083                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3084                 // Process each line one by one. The algorithm has a limit of
3085                 // 128 servers (which is far more than a spanning tree should have
3086                 // anyway, so we're ok). This limit can be raised simply by making
3087                 // the character matrix deeper, 128 rows taking 10k of memory.
3088                 for (int l = 1; l < line; l++)
3089                 {
3090                         // scan across the line looking for the start of the
3091                         // servername (the recursive part of the algorithm has placed
3092                         // the servers at indented positions depending on what they
3093                         // are related to)
3094                         int first_nonspace = 0;
3095                         while (matrix[l][first_nonspace] == ' ')
3096                         {
3097                                 first_nonspace++;
3098                         }
3099                         first_nonspace--;
3100                         // Draw the `- (corner) section: this may be overwritten by
3101                         // another L shape passing along the same vertical pane, becoming
3102                         // a |- (branch) section instead.
3103                         matrix[l][first_nonspace] = '-';
3104                         matrix[l][first_nonspace-1] = '`';
3105                         int l2 = l - 1;
3106                         // Draw upwards until we hit the parent server, causing possibly
3107                         // other corners (`-) to become branches (|-)
3108                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3109                         {
3110                                 matrix[l2][first_nonspace-1] = '|';
3111                                 l2--;
3112                         }
3113                 }
3114                 // dump the whole lot to the user. This is the easy bit, honest.
3115                 for (int t = 0; t < line; t++)
3116                 {
3117                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
3118                 }
3119                 float avg_users = totusers / totservers;
3120                 WriteServ(user->fd,"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);
3121         WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
3122                 return;
3123         }
3124
3125         int HandleSquit(char** parameters, int pcnt, userrec* user)
3126         {
3127                 TreeServer* s = FindServerMask(parameters[0]);
3128                 if (s)
3129                 {
3130                         if (s == TreeRoot)
3131                         {
3132                                  WriteServ(user->fd,"NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3133                                 return 1;
3134                         }
3135                         TreeSocket* sock = s->GetSocket();
3136                         if (sock)
3137                         {
3138                                 log(DEBUG,"Splitting server %s",s->GetName().c_str());
3139                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3140                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3141                                 Srv->RemoveSocket(sock);
3142                         }
3143                         else
3144                         {
3145                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3146                         }
3147                 }
3148                 else
3149                 {
3150                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3151                 }
3152                 return 1;
3153         }
3154
3155         int HandleTime(char** parameters, int pcnt, userrec* user)
3156         {
3157                 if ((user->fd > -1) && (pcnt))
3158                 {
3159                         TreeServer* found = FindServerMask(parameters[0]);
3160                         if (found)
3161                         {
3162                                 // we dont' override for local server
3163                                 if (found == TreeRoot)
3164                                         return 0;
3165
3166                                 std::deque<std::string> params;
3167                                 params.push_back(found->GetName());
3168                                 params.push_back(user->nick);
3169                                 DoOneToOne(Srv->GetServerName(),"TIME",params,found->GetName());
3170                         }
3171                         else
3172                         {
3173                                 WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3174                         }
3175                 }
3176                 return 1;
3177         }
3178
3179         int HandleRemoteWhois(char** parameters, int pcnt, userrec* user)
3180         {
3181                 if ((user->fd > -1) && (pcnt > 1))
3182                 {
3183                         userrec* remote = Srv->FindNick(parameters[1]);
3184                         if ((remote) && (remote->fd < 0))
3185                         {
3186                                 std::deque<std::string> params;
3187                                 params.push_back(parameters[1]);
3188                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3189                                 return 1;
3190                         }
3191                         else if (!remote)
3192                         {
3193                                 WriteServ(user->fd,"401 %s %s :No such nick/channel",user->nick, parameters[1]);
3194                                 WriteServ(user->fd,"318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3195                                 return 1;
3196                         }
3197                 }
3198                 return 0;
3199         }
3200
3201         void DoPingChecks(time_t curtime)
3202         {
3203                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
3204                 {
3205                         TreeServer* serv = TreeRoot->GetChild(j);
3206                         TreeSocket* sock = serv->GetSocket();
3207                         if (sock)
3208                         {
3209                                 if (curtime >= serv->NextPingTime())
3210                                 {
3211                                         if (serv->AnsweredLastPing())
3212                                         {
3213                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
3214                                                 serv->SetNextPingTime(curtime + 120);
3215                                         }
3216                                         else
3217                                         {
3218                                                 // they didnt answer, boot them
3219                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
3220                                                 sock->Squit(serv,"Ping timeout");
3221                                                 Srv->RemoveSocket(sock);
3222                                                 return;
3223                                         }
3224                                 }
3225                         }
3226                 }
3227         }
3228
3229         void AutoConnectServers(time_t curtime)
3230         {
3231                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3232                 {
3233                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
3234                         {
3235                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
3236                                 x->NextConnectTime = curtime + x->AutoConnect;
3237                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3238                                 if (!CheckDupe)
3239                                 {
3240                                         // an autoconnected server is not connected. Check if its time to connect it
3241                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
3242                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3243                                         if (newsocket->GetFd() > -1)
3244                                         {
3245                                                 Srv->AddSocket(newsocket);
3246                                         }
3247                                         else
3248                                         {
3249                                                 WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3250                                                 DELETE(newsocket);
3251                                         }
3252                                 }
3253                         }
3254                 }
3255         }
3256
3257         int HandleVersion(char** parameters, int pcnt, userrec* user)
3258         {
3259                 // we've already checked if pcnt > 0, so this is safe
3260                 TreeServer* found = FindServerMask(parameters[0]);
3261                 if (found)
3262                 {
3263                         std::string Version = found->GetVersion();
3264                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
3265                         if (found == TreeRoot)
3266                         {
3267                                 std::stringstream out(Config->data005);
3268                                 std::string token = "";
3269                                 std::string line5 = "";
3270                                 int token_counter = 0;
3271
3272                                 while (!out.eof())
3273                                 {
3274                                         out >> token;
3275                                         line5 = line5 + token + " ";
3276                                         token_counter++;
3277
3278                                         if ((token_counter >= 13) || (out.eof() == true))
3279                                         {
3280                                                 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
3281                                                 line5 = "";
3282                                                 token_counter = 0;
3283                                         }
3284                                 }
3285                         }
3286                 }
3287                 else
3288                 {
3289                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3290                 }
3291                 return 1;
3292         }
3293
3294         int HandleConnect(char** parameters, int pcnt, userrec* user)
3295         {
3296                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3297                 {
3298                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
3299                         {
3300                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3301                                 if (!CheckDupe)
3302                                 {
3303                                         WriteServ(user->fd,"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);
3304                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3305                                         if (newsocket->GetFd() > -1)
3306                                         {
3307                                                 Srv->AddSocket(newsocket);
3308                                         }
3309                                         else
3310                                         {
3311                                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Error connecting \002%s\002: %s.",user->nick,x->Name.c_str(),strerror(errno));
3312                                                 DELETE(newsocket);
3313                                         }
3314                                         return 1;
3315                                 }
3316                                 else
3317                                 {
3318                                         WriteServ(user->fd,"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());
3319                                         return 1;
3320                                 }
3321                         }
3322                 }
3323                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
3324                 return 1;
3325         }
3326
3327         virtual int OnStats(char statschar, userrec* user)
3328         {
3329                 if (statschar == 'c')
3330                 {
3331                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
3332                         {
3333                                 WriteServ(user->fd,"213 %s C *@%s * %s %d 0 %c%c%c",user->nick,(LinkBlocks[i].HiddenFromStats ? "<hidden>" : LinkBlocks[i].IPAddr).c_str(),LinkBlocks[i].Name.c_str(),LinkBlocks[i].Port,(LinkBlocks[i].EncryptionKey != "" ? 'e' : '-'),(LinkBlocks[i].AutoConnect ? 'a' : '-'),'s');
3334                                 WriteServ(user->fd,"244 %s H * * %s",user->nick,LinkBlocks[i].Name.c_str());
3335                         }
3336                         WriteServ(user->fd,"219 %s %c :End of /STATS report",user->nick,statschar);
3337                         WriteOpers("*** Notice: Stats '%c' requested by %s (%s@%s)",statschar,user->nick,user->ident,user->host);
3338                         return 1;
3339                 }
3340                 return 0;
3341         }
3342
3343         virtual int OnPreCommand(const std::string &command, char **parameters, int pcnt, userrec *user, bool validated)
3344         {
3345                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
3346                 if (!validated)
3347                         return 0;
3348
3349                 if (command == "CONNECT")
3350                 {
3351                         return this->HandleConnect(parameters,pcnt,user);
3352                 }
3353                 else if (command == "SQUIT")
3354                 {
3355                         return this->HandleSquit(parameters,pcnt,user);
3356                 }
3357                 else if (command == "MAP")
3358                 {
3359                         this->HandleMap(parameters,pcnt,user);
3360                         return 1;
3361                 }
3362                 else if ((command == "TIME") && (pcnt > 0))
3363                 {
3364                         return this->HandleTime(parameters,pcnt,user);
3365                 }
3366                 else if (command == "LUSERS")
3367                 {
3368                         this->HandleLusers(parameters,pcnt,user);
3369                         return 1;
3370                 }
3371                 else if (command == "LINKS")
3372                 {
3373                         this->HandleLinks(parameters,pcnt,user);
3374                         return 1;
3375                 }
3376                 else if (command == "WHOIS")
3377                 {
3378                         if (pcnt > 1)
3379                         {
3380                                 // remote whois
3381                                 return this->HandleRemoteWhois(parameters,pcnt,user);
3382                         }
3383                 }
3384                 else if ((command == "VERSION") && (pcnt > 0))
3385                 {
3386                         this->HandleVersion(parameters,pcnt,user);
3387                         return 1;
3388                 }
3389                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
3390                 {
3391                         // this bit of code cleverly routes all module commands
3392                         // to all remote severs *automatically* so that modules
3393                         // can just handle commands locally, without having
3394                         // to have any special provision in place for remote
3395                         // commands and linking protocols.
3396                         std::deque<std::string> params;
3397                         params.clear();
3398                         for (int j = 0; j < pcnt; j++)
3399                         {
3400                                 if (strchr(parameters[j],' '))
3401                                 {
3402                                         params.push_back(":" + std::string(parameters[j]));
3403                                 }
3404                                 else
3405                                 {
3406                                         params.push_back(std::string(parameters[j]));
3407                                 }
3408                         }
3409                         log(DEBUG,"Globally route '%s'",command.c_str());
3410                         DoOneToMany(user->nick,command,params);
3411                 }
3412                 return 0;
3413         }
3414
3415         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
3416         {
3417                 TreeServer* s = FindServer(servername);
3418                 if (s)
3419                 {
3420                         description = s->GetDesc();
3421                 }
3422         }
3423
3424         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
3425         {
3426                 if (source->fd > -1)
3427                 {
3428                         std::deque<std::string> params;
3429                         params.push_back(dest->nick);
3430                         params.push_back(channel->name);
3431                         DoOneToMany(source->nick,"INVITE",params);
3432                 }
3433         }
3434
3435         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
3436         {
3437                 std::deque<std::string> params;
3438                 params.push_back(chan->name);
3439                 params.push_back(":"+topic);
3440                 DoOneToMany(user->nick,"TOPIC",params);
3441         }
3442
3443         virtual void OnWallops(userrec* user, const std::string &text)
3444         {
3445                 if (user->fd > -1)
3446                 {
3447                         std::deque<std::string> params;
3448                         params.push_back(":"+text);
3449                         DoOneToMany(user->nick,"WALLOPS",params);
3450                 }
3451         }
3452
3453         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
3454         {
3455                 if (target_type == TYPE_USER)
3456                 {
3457                         userrec* d = (userrec*)dest;
3458                         if ((d->fd < 0) && (user->fd > -1))
3459                         {
3460                                 std::deque<std::string> params;
3461                                 params.clear();
3462                                 params.push_back(d->nick);
3463                                 params.push_back(":"+text);
3464                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
3465                         }
3466                 }
3467                 else
3468                 {
3469                         if (user->fd > -1)
3470                         {
3471                                 chanrec *c = (chanrec*)dest;
3472                                 std::string cname = c->name;
3473                                 if (status)
3474                                         cname = status + cname;
3475                                 std::deque<TreeServer*> list;
3476                                 GetListOfServersForChannel(c,list);
3477                                 unsigned int ucount = list.size();
3478                                 for (unsigned int i = 0; i < ucount; i++)
3479                                 {
3480                                         TreeSocket* Sock = list[i]->GetSocket();
3481                                         if (Sock)
3482                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
3483                                 }
3484                         }
3485                 }
3486         }
3487
3488         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
3489         {
3490                 if (target_type == TYPE_USER)
3491                 {
3492                         // route private messages which are targetted at clients only to the server
3493                         // which needs to receive them
3494                         userrec* d = (userrec*)dest;
3495                         if ((d->fd < 0) && (user->fd > -1))
3496                         {
3497                                 std::deque<std::string> params;
3498                                 params.clear();
3499                                 params.push_back(d->nick);
3500                                 params.push_back(":"+text);
3501                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
3502                         }
3503                 }
3504                 else
3505                 {
3506                         if (user->fd > -1)
3507                         {
3508                                 chanrec *c = (chanrec*)dest;
3509                                 std::string cname = c->name;
3510                                 if (status)
3511                                         cname = status + cname;
3512                                 std::deque<TreeServer*> list;
3513                                 GetListOfServersForChannel(c,list);
3514                                 unsigned int ucount = list.size();
3515                                 for (unsigned int i = 0; i < ucount; i++)
3516                                 {
3517                                         TreeSocket* Sock = list[i]->GetSocket();
3518                                         if (Sock)
3519                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
3520                                 }
3521                         }
3522                 }
3523         }
3524
3525         virtual void OnBackgroundTimer(time_t curtime)
3526         {
3527                 AutoConnectServers(curtime);
3528                 DoPingChecks(curtime);
3529         }
3530
3531         virtual void OnUserJoin(userrec* user, chanrec* channel)
3532         {
3533                 // Only do this for local users
3534                 if (user->fd > -1)
3535                 {
3536                         std::deque<std::string> params;
3537                         params.clear();
3538                         params.push_back(channel->name);
3539
3540                         if (channel->GetUserCounter() > 1)
3541                         {
3542                                 // not the first in the channel
3543                                 DoOneToMany(user->nick,"JOIN",params);
3544                         }
3545                         else
3546                         {
3547                                 // first in the channel, set up their permissions
3548                                 // and the channel TS with FJOIN.
3549                                 char ts[24];
3550                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
3551                                 params.clear();
3552                                 params.push_back(channel->name);
3553                                 params.push_back(ts);
3554                                 params.push_back("@"+std::string(user->nick));
3555                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
3556                         }
3557                 }
3558         }
3559
3560         virtual void OnChangeHost(userrec* user, const std::string &newhost)
3561         {
3562                 // only occurs for local clients
3563                 if (user->registered != 7)
3564                         return;
3565                 std::deque<std::string> params;
3566                 params.push_back(newhost);
3567                 DoOneToMany(user->nick,"FHOST",params);
3568         }
3569
3570         virtual void OnChangeName(userrec* user, const std::string &gecos)
3571         {
3572                 // only occurs for local clients
3573                 if (user->registered != 7)
3574                         return;
3575                 std::deque<std::string> params;
3576                 params.push_back(gecos);
3577                 DoOneToMany(user->nick,"FNAME",params);
3578         }
3579
3580         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
3581         {
3582                 if (user->fd > -1)
3583                 {
3584                         std::deque<std::string> params;
3585                         params.push_back(channel->name);
3586                         if (partmessage != "")
3587                                 params.push_back(":"+partmessage);
3588                         DoOneToMany(user->nick,"PART",params);
3589                 }
3590         }
3591
3592         virtual void OnUserConnect(userrec* user)
3593         {
3594                 char agestr[MAXBUF];
3595                 if (user->fd > -1)
3596                 {
3597                         std::deque<std::string> params;
3598                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
3599                         params.push_back(agestr);
3600                         params.push_back(user->nick);
3601                         params.push_back(user->host);
3602                         params.push_back(user->dhost);
3603                         params.push_back(user->ident);
3604                         params.push_back("+"+std::string(user->FormatModes()));
3605                         params.push_back((char*)inet_ntoa(user->ip4));
3606                         params.push_back(":"+std::string(user->fullname));
3607                         DoOneToMany(Srv->GetServerName(),"NICK",params);
3608
3609                         // User is Local, change needs to be reflected!
3610                         TreeServer* SourceServer = FindServer(user->server);
3611                         if (SourceServer)
3612                         {
3613                                 SourceServer->AddUserCount();
3614                         }
3615
3616                 }
3617         }
3618
3619         virtual void OnUserQuit(userrec* user, const std::string &reason)
3620         {
3621                 if ((user->fd > -1) && (user->registered == 7))
3622                 {
3623                         std::deque<std::string> params;
3624                         params.push_back(":"+reason);
3625                         DoOneToMany(user->nick,"QUIT",params);
3626                 }
3627                 // Regardless, We need to modify the user Counts..
3628                 TreeServer* SourceServer = FindServer(user->server);
3629                 if (SourceServer)
3630                 {
3631                         SourceServer->DelUserCount();
3632                 }
3633
3634         }
3635
3636         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
3637         {
3638                 if (user->fd > -1)
3639                 {
3640                         std::deque<std::string> params;
3641                         params.push_back(user->nick);
3642                         DoOneToMany(oldnick,"NICK",params);
3643                 }
3644         }
3645
3646         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
3647         {
3648                 if ((source) && (source->fd > -1))
3649                 {
3650                         std::deque<std::string> params;
3651                         params.push_back(chan->name);
3652                         params.push_back(user->nick);
3653                         params.push_back(":"+reason);
3654                         DoOneToMany(source->nick,"KICK",params);
3655                 }
3656                 else if (!source)
3657                 {
3658                         std::deque<std::string> params;
3659                         params.push_back(chan->name);
3660                         params.push_back(user->nick);
3661                         params.push_back(":"+reason);
3662                         DoOneToMany(Srv->GetServerName(),"KICK",params);
3663                 }
3664         }
3665
3666         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
3667         {
3668                 std::deque<std::string> params;
3669                 params.push_back(dest->nick);
3670                 params.push_back(":"+reason);
3671                 DoOneToMany(source->nick,"KILL",params);
3672         }
3673
3674         virtual void OnRehash(const std::string &parameter)
3675         {
3676                 if (parameter != "")
3677                 {
3678                         std::deque<std::string> params;
3679                         params.push_back(parameter);
3680                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
3681                         // check for self
3682                         if (Srv->MatchText(Srv->GetServerName(),parameter))
3683                         {
3684                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
3685                                 Srv->RehashServer();
3686                         }
3687                 }
3688                 ReadConfiguration(false);
3689         }
3690
3691         // note: the protocol does not allow direct umode +o except
3692         // via NICK with 8 params. sending OPERTYPE infers +o modechange
3693         // locally.
3694         virtual void OnOper(userrec* user, const std::string &opertype)
3695         {
3696                 if (user->fd > -1)
3697                 {
3698                         std::deque<std::string> params;
3699                         params.push_back(opertype);
3700                         DoOneToMany(user->nick,"OPERTYPE",params);
3701                 }
3702         }
3703
3704         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
3705         {
3706                 if (source->fd > -1)
3707                 {
3708                         char type[8];
3709                         snprintf(type,8,"%cLINE",linetype);
3710                         std::string stype = type;
3711                         if (adding)
3712                         {
3713                                 char sduration[MAXBUF];
3714                                 snprintf(sduration,MAXBUF,"%ld",duration);
3715                                 std::deque<std::string> params;
3716                                 params.push_back(host);
3717                                 params.push_back(sduration);
3718                                 params.push_back(":"+reason);
3719                                 DoOneToMany(source->nick,stype,params);
3720                         }
3721                         else
3722                         {
3723                                 std::deque<std::string> params;
3724                                 params.push_back(host);
3725                                 DoOneToMany(source->nick,stype,params);
3726                         }
3727                 }
3728         }
3729
3730         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
3731         {
3732                 OnLine(source,hostmask,true,'G',duration,reason);
3733         }
3734
3735         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
3736         {
3737                 OnLine(source,ipmask,true,'Z',duration,reason);
3738         }
3739
3740         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
3741         {
3742                 OnLine(source,nickmask,true,'Q',duration,reason);
3743         }
3744
3745         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
3746         {
3747                 OnLine(source,hostmask,true,'E',duration,reason);
3748         }
3749
3750         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
3751         {
3752                 OnLine(source,hostmask,false,'G',0,"");
3753         }
3754
3755         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
3756         {
3757                 OnLine(source,ipmask,false,'Z',0,"");
3758         }
3759
3760         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
3761         {
3762                 OnLine(source,nickmask,false,'Q',0,"");
3763         }
3764
3765         virtual void OnDelELine(userrec* source, const std::string &hostmask)
3766         {
3767                 OnLine(source,hostmask,false,'E',0,"");
3768         }
3769
3770         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
3771         {
3772                 if ((user->fd > -1) && (user->registered == 7))
3773                 {
3774                         if (target_type == TYPE_USER)
3775                         {
3776                                 userrec* u = (userrec*)dest;
3777                                 std::deque<std::string> params;
3778                                 params.push_back(u->nick);
3779                                 params.push_back(text);
3780                                 DoOneToMany(user->nick,"MODE",params);
3781                         }
3782                         else
3783                         {
3784                                 chanrec* c = (chanrec*)dest;
3785                                 std::deque<std::string> params;
3786                                 params.push_back(c->name);
3787                                 params.push_back(text);
3788                                 DoOneToMany(user->nick,"MODE",params);
3789                         }
3790                 }
3791         }
3792
3793         virtual void OnSetAway(userrec* user)
3794         {
3795                 if (IS_LOCAL(user))
3796                 {
3797                         std::deque<std::string> params;
3798                         params.push_back(":"+std::string(user->awaymsg));
3799                         DoOneToMany(user->nick,"AWAY",params);
3800                 }
3801         }
3802
3803         virtual void OnCancelAway(userrec* user)
3804         {
3805                 if (IS_LOCAL(user))
3806                 {
3807                         std::deque<std::string> params;
3808                         params.clear();
3809                         DoOneToMany(user->nick,"AWAY",params);
3810                 }
3811         }
3812
3813         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
3814         {
3815                 TreeSocket* s = (TreeSocket*)opaque;
3816                 if (target)
3817                 {
3818                         if (target_type == TYPE_USER)
3819                         {
3820                                 userrec* u = (userrec*)target;
3821                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
3822                         }
3823                         else
3824                         {
3825                                 chanrec* c = (chanrec*)target;
3826                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
3827                         }
3828                 }
3829         }
3830
3831         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
3832         {
3833                 TreeSocket* s = (TreeSocket*)opaque;
3834                 if (target)
3835                 {
3836                         if (target_type == TYPE_USER)
3837                         {
3838                                 userrec* u = (userrec*)target;
3839                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+u->nick+" "+extname+" :"+extdata);
3840                         }
3841                         else if (target_type == TYPE_OTHER)
3842                         {
3843                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA * "+extname+" :"+extdata);
3844                         }
3845                         else if (target_type == TYPE_CHANNEL)
3846                         {
3847                                 chanrec* c = (chanrec*)target;
3848                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+c->name+" "+extname+" :"+extdata);
3849                         }
3850                 }
3851         }
3852
3853         virtual void OnEvent(Event* event)
3854         {
3855                 if (event->GetEventID() == "send_metadata")
3856                 {
3857                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
3858                         if (params->size() < 3)
3859                                 return;
3860                         (*params)[2] = ":" + (*params)[2];
3861                         DoOneToMany(Srv->GetServerName(),"METADATA",*params);
3862                 }
3863                 else if (event->GetEventID() == "send_mode")
3864                 {
3865                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
3866                         if (params->size() < 2)
3867                                 return;
3868                         DoOneToMany(Srv->GetServerName(),"FMODE",*params);
3869                 }
3870         }
3871
3872         virtual ~ModuleSpanningTree()
3873         {
3874         }
3875
3876         virtual Version GetVersion()
3877         {
3878                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
3879         }
3880
3881         void Implements(char* List)
3882         {
3883                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
3884                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
3885                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
3886                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
3887                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
3888                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
3889                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
3890         }
3891
3892         /* It is IMPORTANT that m_spanningtree is the last module in the chain
3893          * so that any activity it sees is FINAL, e.g. we arent going to send out
3894          * a NICK message before m_cloaking has finished putting the +x on the user,
3895          * etc etc.
3896          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
3897          * the module call queue.
3898          */
3899         Priority Prioritize()
3900         {
3901                 return PRIORITY_LAST;
3902         }
3903 };
3904
3905
3906 class ModuleSpanningTreeFactory : public ModuleFactory
3907 {
3908  public:
3909         ModuleSpanningTreeFactory()
3910         {
3911         }
3912
3913         ~ModuleSpanningTreeFactory()
3914         {
3915         }
3916
3917         virtual Module * CreateModule(Server* Me)
3918         {
3919                 TreeProtocolModule = new ModuleSpanningTree(Me);
3920                 return TreeProtocolModule;
3921         }
3922
3923 };
3924
3925
3926 extern "C" void * init_module( void )
3927 {
3928         return new ModuleSpanningTreeFactory;
3929 }