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 "configreader.h"
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25 #include "commands/cmd_whois.h"
  26 #include "commands/cmd_stats.h"
  27 #include "socket.h"
  28 #include "inspircd.h"
  29 #include "wildcard.h"
  30 #include "xline.h"
  31 #include "cull_list.h"
  32 #include "aes.h"
  33
  34 #define nspace __gnu_cxx
  35
  36 /*
  37  * The server list in InspIRCd is maintained as two structures
  38  * which hold the data in different ways. Most of the time, we
  39  * want to very quicky obtain three pieces of information:
  40  *
  41  * (1) The information on a server
  42  * (2) The information on the server we must send data through
  43  *     to actually REACH the server we're after
  44  * (3) Potentially, the child/parent objects of this server
  45  *
  46  * The InspIRCd spanning protocol provides easy access to these
  47  * by storing the data firstly in a recursive structure, where
  48  * each item references its parent item, and a dynamic list
  49  * of child items, and another structure which stores the items
  50  * hashed, linearly. This means that if we want to find a server
  51  * by name quickly, we can look it up in the hash, avoiding
  52  * any O(n) lookups. If however, during a split or sync, we want
  53  * to apply an operation to a server, and any of its child objects
  54  * we can resort to recursion to walk the tree structure.
  55  */
  56
  57 using irc::sockets::MatchCIDR;
  58
  59 class ModuleSpanningTree;
  60 static ModuleSpanningTree* TreeProtocolModule;
  61 static InspIRCd* ServerInstance;
  62
  63 /* Any socket can have one of five states at any one time.
  64  * The LISTENER state indicates a socket which is listening
  65  * for connections. It cannot receive data itself, only incoming
  66  * sockets.
  67  * The CONNECTING state indicates an outbound socket which is
  68  * waiting to be writeable.
  69  * The WAIT_AUTH_1 state indicates the socket is outbound and
  70  * has successfully connected, but has not yet sent and received
  71  * SERVER strings.
  72  * The WAIT_AUTH_2 state indicates that the socket is inbound
  73  * (allocated by a LISTENER) but has not yet sent and received
  74  * SERVER strings.
  75  * The CONNECTED state represents a fully authorized, fully
  76  * connected server.
  77  */
  78 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  79
  80 /* Foward declarations */
  81 class TreeServer;
  82 class TreeSocket;
  83
  84 /* This variable represents the root of the server tree
  85  * (for all intents and purposes, it's us)
  86  */
  87 TreeServer *TreeRoot;
  88
  89 /* This hash_map holds the hash equivalent of the server
  90  * tree, used for rapid linear lookups.
  91  */
  92 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  93 server_hash serverlist;
  94
  95 typedef nspace::hash_map<std::string, userrec*> uid_hash;
  96 typedef nspace::hash_map<std::string, char*> sid_hash;
  97
  98 /* More forward declarations */
  99 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 100 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 101 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 102 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 103 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 104 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 105 void ReadConfiguration(bool rebind);
 106
 107 /* Flatten links and /MAP for non-opers */
 108 bool FlatLinks;
 109 /* Hide U-Lined servers in /MAP and /LINKS */
 110 bool HideULines;
 111
 112 std::vector<std::string> ValidIPs;
 113
 114 class UserManager : public classbase
 115 {
 116         uid_hash uids;
 117         sid_hash sids;
 118  public:
 119         UserManager()
 120         {
 121                 uids.clear();
 122                 sids.clear();
 123         }
 124
 125         std::string UserToUID(userrec* user)
 126         {
 127                 return "";
 128         }
 129
 130         std::string UIDToUser(const std::string &UID)
 131         {
 132                 return "";
 133         }
 134
 135         std::string CreateAndAdd(userrec* user)
 136         {
 137                 return "";
 138         }
 139
 140         std::string CreateAndAdd(const std::string &servername)
 141         {
 142                 return "";
 143         }
 144
 145         std::string ServerToSID(const std::string &servername)
 146         {
 147                 return "";
 148         }
 149
 150         std::string SIDToServer(const std::string &SID)
 151         {
 152                 return "";
 153         }
 154
 155         userrec* FindByID(const std::string &UID)
 156         {
 157                 return NULL;
 158         }
 159 };
 160
 161
 162 /* Each server in the tree is represented by one class of
 163  * type TreeServer. A locally connected TreeServer can
 164  * have a class of type TreeSocket associated with it, for
 165  * remote servers, the TreeSocket entry will be NULL.
 166  * Each server also maintains a pointer to its parent
 167  * (NULL if this server is ours, at the top of the tree)
 168  * and a pointer to its "Route" (see the comments in the
 169  * constructors below), and also a dynamic list of pointers
 170  * to its children which can be iterated recursively
 171  * if required. Creating or deleting objects of type
 172  i* TreeServer automatically maintains the hash_map of
 173  * TreeServer items, deleting and inserting them as they
 174  * are created and destroyed.
 175  */
 176
 177 class TreeServer : public classbase
 178 {
 179         InspIRCd* ServerInstance;               /* Creator */
 180         TreeServer* Parent;                     /* Parent entry */
 181         TreeServer* Route;                      /* Route entry */
 182         std::vector<TreeServer*> Children;      /* List of child objects */
 183         irc::string ServerName;                 /* Server's name */
 184         std::string ServerDesc;                 /* Server's description */
 185         std::string VersionString;              /* Version string or empty string */
 186         int UserCount;                          /* Not used in this version */
 187         int OperCount;                          /* Not used in this version */
 188         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 189         time_t NextPing;                        /* After this time, the server should be PINGed*/
 190         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 191
 192  public:
 193
 194         /* We don't use this constructor. Its a dummy, and won't cause any insertion
 195          * of the TreeServer into the hash_map. See below for the two we DO use.
 196          */
 197         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 198         {
 199                 Parent = NULL;
 200                 ServerName = "";
 201                 ServerDesc = "";
 202                 VersionString = "";
 203                 UserCount = OperCount = 0;
 204                 VersionString = ServerInstance->GetVersionString();
 205         }
 206
 207         /* We use this constructor only to create the 'root' item, TreeRoot, which
 208          * represents our own server. Therefore, it has no route, no parent, and
 209          * no socket associated with it. Its version string is our own local version.
 210          */
 211         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 212         {
 213                 Parent = NULL;
 214                 VersionString = "";
 215                 UserCount = OperCount = 0;
 216                 VersionString = ServerInstance->GetVersionString();
 217                 Route = NULL;
 218                 Socket = NULL; /* Fix by brain */
 219                 AddHashEntry();
 220         }
 221
 222         /* When we create a new server, we call this constructor to initialize it.
 223          * This constructor initializes the server's Route and Parent, and sets up
 224          * its ping counters so that it will be pinged one minute from now.
 225          */
 226         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 227                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 228         {
 229                 VersionString = "";
 230                 UserCount = OperCount = 0;
 231                 this->SetNextPingTime(time(NULL) + 60);
 232                 this->SetPingFlag();
 233
 234                 /* find the 'route' for this server (e.g. the one directly connected
 235                  * to the local server, which we can use to reach it)
 236                  *
 237                  * In the following example, consider we have just added a TreeServer
 238                  * class for server G on our network, of which we are server A.
 239                  * To route traffic to G (marked with a *) we must send the data to
 240                  * B (marked with a +) so this algorithm initializes the 'Route'
 241                  * value to point at whichever server traffic must be routed through
 242                  * to get here. If we were to try this algorithm with server B,
 243                  * the Route pointer would point at its own object ('this').
 244                  *
 245                  *              A
 246                  *             / \
 247                  *          + B   C
 248                  *           / \   \
 249                  *          D   E   F
 250                  *         /         \
 251                  *      * G           H
 252                  *
 253                  * We only run this algorithm when a server is created, as
 254                  * the routes remain constant while ever the server exists, and
 255                  * do not need to be re-calculated.
 256                  */
 257
 258                 Route = Above;
 259                 if (Route == TreeRoot)
 260                 {
 261                         Route = this;
 262                 }
 263                 else
 264                 {
 265                         while (this->Route->GetParent() != TreeRoot)
 266                         {
 267                                 this->Route = Route->GetParent();
 268                         }
 269                 }
 270
 271                 /* Because recursive code is slow and takes a lot of resources,
 272                  * we store two representations of the server tree. The first
 273                  * is a recursive structure where each server references its
 274                  * children and its parent, which is used for netbursts and
 275                  * netsplits to dump the whole dataset to the other server,
 276                  * and the second is used for very fast lookups when routing
 277                  * messages and is instead a hash_map, where each item can
 278                  * be referenced by its server name. The AddHashEntry()
 279                  * call below automatically inserts each TreeServer class
 280                  * into the hash_map as it is created. There is a similar
 281                  * maintainance call in the destructor to tidy up deleted
 282                  * servers.
 283                  */
 284
 285                 this->AddHashEntry();
 286         }
 287
 288         int QuitUsers(const std::string &reason)
 289         {
 290                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 291                 const char* reason_s = reason.c_str();
 292                 std::vector<userrec*> time_to_die;
 293                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 294                 {
 295                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 296                         {
 297                                 time_to_die.push_back(n->second);
 298                         }
 299                 }
 300                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 301                 {
 302                         userrec* a = (userrec*)*n;
 303                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 304                         if (!IS_LOCAL(a))
 305                                 userrec::QuitUser(ServerInstance,a,reason_s);
 306                 }
 307                 return time_to_die.size();
 308         }
 309
 310         /* This method is used to add the structure to the
 311          * hash_map for linear searches. It is only called
 312          * by the constructors.
 313          */
 314         void AddHashEntry()
 315         {
 316                 server_hash::iterator iter;
 317                 iter = serverlist.find(this->ServerName.c_str());
 318                 if (iter == serverlist.end())
 319                         serverlist[this->ServerName.c_str()] = this;
 320         }
 321
 322         /* This method removes the reference to this object
 323          * from the hash_map which is used for linear searches.
 324          * It is only called by the default destructor.
 325          */
 326         void DelHashEntry()
 327         {
 328                 server_hash::iterator iter;
 329                 iter = serverlist.find(this->ServerName.c_str());
 330                 if (iter != serverlist.end())
 331                         serverlist.erase(iter);
 332         }
 333
 334         /* These accessors etc should be pretty self-
 335          * explanitory.
 336          */
 337
 338         TreeServer* GetRoute()
 339         {
 340                 return Route;
 341         }
 342
 343         std::string GetName()
 344         {
 345                 return ServerName.c_str();
 346         }
 347
 348         std::string GetDesc()
 349         {
 350                 return ServerDesc;
 351         }
 352
 353         std::string GetVersion()
 354         {
 355                 return VersionString;
 356         }
 357
 358         void SetNextPingTime(time_t t)
 359         {
 360                 this->NextPing = t;
 361                 LastPingWasGood = false;
 362         }
 363
 364         time_t NextPingTime()
 365         {
 366                 return NextPing;
 367         }
 368
 369         bool AnsweredLastPing()
 370         {
 371                 return LastPingWasGood;
 372         }
 373
 374         void SetPingFlag()
 375         {
 376                 LastPingWasGood = true;
 377         }
 378
 379         int GetUserCount()
 380         {
 381                 return UserCount;
 382         }
 383
 384         void AddUserCount()
 385         {
 386                 UserCount++;
 387         }
 388
 389         void DelUserCount()
 390         {
 391                 UserCount--;
 392         }
 393
 394         int GetOperCount()
 395         {
 396                 return OperCount;
 397         }
 398
 399         TreeSocket* GetSocket()
 400         {
 401                 return Socket;
 402         }
 403
 404         TreeServer* GetParent()
 405         {
 406                 return Parent;
 407         }
 408
 409         void SetVersion(std::string Version)
 410         {
 411                 VersionString = Version;
 412         }
 413
 414         unsigned int ChildCount()
 415         {
 416                 return Children.size();
 417         }
 418
 419         TreeServer* GetChild(unsigned int n)
 420         {
 421                 if (n < Children.size())
 422                 {
 423                         /* Make sure they  cant request
 424                          * an out-of-range object. After
 425                          * all we know what these programmer
 426                          * types are like *grin*.
 427                          */
 428                         return Children[n];
 429                 }
 430                 else
 431                 {
 432                         return NULL;
 433                 }
 434         }
 435
 436         void AddChild(TreeServer* Child)
 437         {
 438                 Children.push_back(Child);
 439         }
 440
 441         bool DelChild(TreeServer* Child)
 442         {
 443                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 444                 {
 445                         if (*a == Child)
 446                         {
 447                                 Children.erase(a);
 448                                 return true;
 449                         }
 450                 }
 451                 return false;
 452         }
 453
 454         /* Removes child nodes of this node, and of that node, etc etc.
 455          * This is used during netsplits to automatically tidy up the
 456          * server tree. It is slow, we don't use it for much else.
 457          */
 458         bool Tidy()
 459         {
 460                 bool stillchildren = true;
 461                 while (stillchildren)
 462                 {
 463                         stillchildren = false;
 464                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 465                         {
 466                                 TreeServer* s = (TreeServer*)*a;
 467                                 s->Tidy();
 468                                 Children.erase(a);
 469                                 DELETE(s);
 470                                 stillchildren = true;
 471                                 break;
 472                         }
 473                 }
 474                 return true;
 475         }
 476
 477         ~TreeServer()
 478         {
 479                 /* We'd better tidy up after ourselves, eh? */
 480                 this->DelHashEntry();
 481         }
 482 };
 483
 484 /* The Link class might as well be a struct,
 485  * but this is C++ and we don't believe in structs (!).
 486  * It holds the entire information of one <link>
 487  * tag from the main config file. We maintain a list
 488  * of them, and populate the list on rehash/load.
 489  */
 490
 491 class Link : public classbase
 492 {
 493  public:
 494          irc::string Name;
 495          std::string IPAddr;
 496          int Port;
 497          std::string SendPass;
 498          std::string RecvPass;
 499          unsigned long AutoConnect;
 500          time_t NextConnectTime;
 501          std::string EncryptionKey;
 502          bool HiddenFromStats;
 503 };
 504
 505 /* The usual stuff for inspircd modules,
 506  * plus the vector of Link classes which we
 507  * use to store the <link> tags from the config
 508  * file.
 509  */
 510 ConfigReader *Conf;
 511 std::vector<Link> LinkBlocks;
 512
 513 /* Yay for fast searches!
 514  * This is hundreds of times faster than recursion
 515  * or even scanning a linked list, especially when
 516  * there are more than a few servers to deal with.
 517  * (read as: lots).
 518  */
 519 TreeServer* FindServer(std::string ServerName)
 520 {
 521         server_hash::iterator iter;
 522         iter = serverlist.find(ServerName.c_str());
 523         if (iter != serverlist.end())
 524         {
 525                 return iter->second;
 526         }
 527         else
 528         {
 529                 return NULL;
 530         }
 531 }
 532
 533 /* Returns the locally connected server we must route a
 534  * message through to reach server 'ServerName'. This
 535  * only applies to one-to-one and not one-to-many routing.
 536  * See the comments for the constructor of TreeServer
 537  * for more details.
 538  */
 539 TreeServer* BestRouteTo(std::string ServerName)
 540 {
 541         if (ServerName.c_str() == TreeRoot->GetName())
 542                 return NULL;
 543         TreeServer* Found = FindServer(ServerName);
 544         if (Found)
 545         {
 546                 return Found->GetRoute();
 547         }
 548         else
 549         {
 550                 return NULL;
 551         }
 552 }
 553
 554 /* Find the first server matching a given glob mask.
 555  * Theres no find-using-glob method of hash_map [awwww :-(]
 556  * so instead, we iterate over the list using an iterator
 557  * and match each one until we get a hit. Yes its slow,
 558  * deal with it.
 559  */
 560 TreeServer* FindServerMask(std::string ServerName)
 561 {
 562         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 563         {
 564                 if (match(i->first.c_str(),ServerName.c_str()))
 565                         return i->second;
 566         }
 567         return NULL;
 568 }
 569
 570 /* A convenient wrapper that returns true if a server exists */
 571 bool IsServer(std::string ServerName)
 572 {
 573         return (FindServer(ServerName) != NULL);
 574 }
 575
 576
 577 class cmd_rconnect : public command_t
 578 {
 579         Module* Creator;
 580  public:
 581         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 582         {
 583                 this->source = "m_spanningtree.so";
 584                 syntax = "<remote-server-mask> <servermask>";
 585         }
 586
 587         void Handle (const char** parameters, int pcnt, userrec *user)
 588         {
 589                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 590                 /* Is this aimed at our server? */
 591                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 592                 {
 593                         /* Yes, initiate the given connect */
 594                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 595                         const char* para[1];
 596                         para[0] = parameters[1];
 597                         Creator->OnPreCommand("CONNECT", para, 1, user, true);
 598                 }
 599         }
 600 };
 601
 602
 603
 604 /* Every SERVER connection inbound or outbound is represented by
 605  * an object of type TreeSocket.
 606  * TreeSockets, being inherited from InspSocket, can be tied into
 607  * the core socket engine, and we cn therefore receive activity events
 608  * for them, just like activex objects on speed. (yes really, that
 609  * is a technical term!) Each of these which relates to a locally
 610  * connected server is assocated with it, by hooking it onto a
 611  * TreeSocket class using its constructor. In this way, we can
 612  * maintain a list of servers, some of which are directly connected,
 613  * some of which are not.
 614  */
 615
 616 class TreeSocket : public InspSocket
 617 {
 618         std::string myhost;
 619         std::string in_buffer;
 620         ServerState LinkState;
 621         std::string InboundServerName;
 622         std::string InboundDescription;
 623         int num_lost_users;
 624         int num_lost_servers;
 625         time_t NextPing;
 626         bool LastPingWasGood;
 627         bool bursting;
 628         AES* ctx_in;
 629         AES* ctx_out;
 630         unsigned int keylength;
 631         std::string ModuleList;
 632         std::map<std::string,std::string> CapKeys;
 633
 634  public:
 635
 636         /* Because most of the I/O gubbins are encapsulated within
 637          * InspSocket, we just call the superclass constructor for
 638          * most of the action, and append a few of our own values
 639          * to it.
 640          */
 641         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 642                 : InspSocket(SI, host, port, listening, maxtime)
 643         {
 644                 myhost = host;
 645                 this->LinkState = LISTENER;
 646                 this->ctx_in = NULL;
 647                 this->ctx_out = NULL;
 648         }
 649
 650         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 651                 : InspSocket(SI, host, port, listening, maxtime)
 652         {
 653                 myhost = ServerName;
 654                 this->LinkState = CONNECTING;
 655                 this->ctx_in = NULL;
 656                 this->ctx_out = NULL;
 657         }
 658
 659         /* When a listening socket gives us a new file descriptor,
 660          * we must associate it with a socket without creating a new
 661          * connection. This constructor is used for this purpose.
 662          */
 663         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 664                 : InspSocket(SI, newfd, ip)
 665         {
 666                 this->LinkState = WAIT_AUTH_1;
 667                 this->ctx_in = NULL;
 668                 this->ctx_out = NULL;
 669                 this->SendCapabilities();
 670         }
 671
 672         ~TreeSocket()
 673         {
 674                 if (ctx_in)
 675                         DELETE(ctx_in);
 676                 if (ctx_out)
 677                         DELETE(ctx_out);
 678         }
 679
 680         void InitAES(std::string key,std::string SName)
 681         {
 682                 if (key == "")
 683                         return;
 684
 685                 ctx_in = new AES();
 686                 ctx_out = new AES();
 687                 ServerInstance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 688                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 689                 keylength = key.length();
 690                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 691                 {
 692                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 693                         ServerInstance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 694                 }
 695                 else
 696                 {
 697                         this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 698                         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\
 699                                 \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);
 700                         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\
 701                                 \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);
 702                 }
 703         }
 704
 705         /* When an outbound connection finishes connecting, we receive
 706          * this event, and must send our SERVER string to the other
 707          * side. If the other side is happy, as outlined in the server
 708          * to server docs on the inspircd.org site, the other side
 709          * will then send back its own server string.
 710          */
 711         virtual bool OnConnected()
 712         {
 713                 if (this->LinkState == CONNECTING)
 714                 {
 715                         /* we do not need to change state here. */
 716                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 717                         {
 718                                 if (x->Name == this->myhost)
 719                                 {
 720                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 721                                         this->SendCapabilities();
 722                                         if (x->EncryptionKey != "")
 723                                         {
 724                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 725                                                 {
 726                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 727                                                 }
 728                                                 else
 729                                                 {
 730                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 731                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 732                                                 }
 733                                         }
 734                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 735                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 736                                         return true;
 737                                 }
 738                         }
 739                 }
 740                 /* There is a (remote) chance that between the /CONNECT and the connection
 741                  * being accepted, some muppet has removed the <link> block and rehashed.
 742                  * If that happens the connection hangs here until it's closed. Unlikely
 743                  * and rather harmless.
 744                  */
 745                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 746                 return true;
 747         }
 748
 749         virtual void OnError(InspSocketError e)
 750         {
 751                 /* We don't handle this method, because all our
 752                  * dirty work is done in OnClose() (see below)
 753                  * which is still called on error conditions too.
 754                  */
 755                 if (e == I_ERR_CONNECT)
 756                 {
 757                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection refused");
 758                 }
 759         }
 760
 761         virtual int OnDisconnect()
 762         {
 763                 /* For the same reason as above, we don't
 764                  * handle OnDisconnect()
 765                  */
 766                 return true;
 767         }
 768
 769         /* Recursively send the server tree with distances as hops.
 770          * This is used during network burst to inform the other server
 771          * (and any of ITS servers too) of what servers we know about.
 772          * If at any point any of these servers already exist on the other
 773          * end, our connection may be terminated. The hopcounts given
 774          * by this function are relative, this doesn't matter so long as
 775          * they are all >1, as all the remote servers re-calculate them
 776          * to be relative too, with themselves as hop 0.
 777          */
 778         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 779         {
 780                 char command[1024];
 781                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 782                 {
 783                         TreeServer* recursive_server = Current->GetChild(q);
 784                         if (recursive_server != s)
 785                         {
 786                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 787                                 this->WriteLine(command);
 788                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 789                                 /* down to next level */
 790                                 this->SendServers(recursive_server, s, hops+1);
 791                         }
 792                 }
 793         }
 794
 795         std::string MyCapabilities()
 796         {
 797                 std::vector<std::string> modlist;
 798                 std::string capabilities = "";
 799
 800                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 801                 {
 802                         if ((this->Instance->modules[i]->GetVersion().Flags & VF_STATIC) || (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON))
 803                                 modlist.push_back(this->Instance->Config->module_names[i]);
 804                 }
 805                 sort(modlist.begin(),modlist.end());
 806                 for (unsigned int i = 0; i < modlist.size(); i++)
 807                 {
 808                         if (i)
 809                                 capabilities = capabilities + ",";
 810                         capabilities = capabilities + modlist[i];
 811                 }
 812                 return capabilities;
 813         }
 814
 815         void SendCapabilities()
 816         {
 817                 irc::commasepstream modulelist(MyCapabilities());
 818
 819                 this->WriteLine("CAPAB START");
 820
 821                 /* Send module names, split at 509 length */
 822                 std::string item = "*";
 823                 std::string line = "CAPAB MODULES ";
 824                 while ((item = modulelist.GetToken()) != "")
 825                 {
 826                         if (line.length() + item.length() + 1 > 509)
 827                         {
 828                                 this->WriteLine(line);
 829                                 line = "CAPAB MODULES ";
 830                         }
 831
 832                         if (line != "CAPAB MODULES ")
 833                                 line.append(",");
 834
 835                         line.append(item);
 836                 }
 837                 if (line != "CAPAB MODULES ")
 838                         this->WriteLine(line);
 839
 840                 int ip6 = 0;
 841                 int ip6support = 0;
 842 #ifdef IPV6
 843                 ip6 = 1;
 844 #endif
 845 #ifdef SUPPORT_IP6LINKS
 846                 ip6support = 1;
 847 #endif
 848                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support));
 849
 850                 this->WriteLine("CAPAB END");
 851         }
 852
 853         /* Check a comma seperated list for an item */
 854         bool HasItem(const std::string &list, const std::string &item)
 855         {
 856                 irc::commasepstream seplist(list);
 857
 858                 std::string item2 = "*";
 859                 while ((item2 = seplist.GetToken()) != "")
 860                 {
 861                         if (item2 == item)
 862                                 return true;
 863                 }
 864
 865                 return false;
 866         }
 867
 868         /* Isolate and return the elements that are different between two comma seperated lists */
 869         std::string ListDifference(const std::string &one, const std::string &two)
 870         {
 871                 irc::commasepstream list_one(one);
 872                 std::string item = "*";
 873                 std::string result = "";
 874                 while ((item = list_one.GetToken()) != "")
 875                 {
 876                         if (!HasItem(two, item))
 877                         {
 878                                 result.append(" ");
 879                                 result.append(item);
 880                         }
 881                 }
 882                 return result;
 883         }
 884
 885         bool Capab(std::deque<std::string> params)
 886         {
 887                 if (params.size() < 1)
 888                 {
 889                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 890                         return false;
 891                 }
 892
 893                 if (params[0] == "START")
 894                 {
 895                         this->ModuleList = "";
 896                         this->CapKeys.clear();
 897                 }
 898                 else if (params[0] == "END")
 899                 {
 900                         std::string reason = "";
 901                         int ip6support = 0;
 902 #ifdef SUPPORT_IP6LINKS
 903                         ip6support = 1;
 904 #endif
 905                         /* Compare ModuleList and check CapKeys...
 906                          * Maybe this could be tidier? -- Brain
 907                          */
 908                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 909                         {
 910                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 911                                 if (!diff.length())
 912                                 {
 913                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 914                                 }
 915                                 else
 916                                 {
 917                                         diff = "this server:" + diff;
 918                                 }
 919                                 if (diff.length() == 12)
 920                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 921                                 else
 922                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 923                         }
 924
 925                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 926                                 reason = "We don't both support linking to IPV6 servers";
 927
 928                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 929                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 930
 931                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 932                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 933
 934                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 935                                 reason = "We don't both have halfop support enabled/disabled identically";
 936
 937                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 938                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 939
 940                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 941                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 942
 943                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 944                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 945
 946                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 947                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 948
 949                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 950                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 951
 952                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 953                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 954
 955                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 956                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 957
 958                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 959                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 960
 961                         if (reason.length())
 962                         {
 963                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 964                                 return false;
 965                         }
 966                 }
 967                 else if ((params[0] == "MODULES") && (params.size() == 2))
 968                 {
 969                         if (!this->ModuleList.length())
 970                         {
 971                                 this->ModuleList.append(params[1]);
 972                         }
 973                         else
 974                         {
 975                                 this->ModuleList.append(",");
 976                                 this->ModuleList.append(params[1]);
 977                         }
 978                 }
 979                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
 980                 {
 981                         irc::tokenstream capabs(params[1]);
 982                         std::string item = "*";
 983                         while ((item = capabs.GetToken()) != "")
 984                         {
 985                                 /* Process each key/value pair */
 986                                 std::string::size_type equals = item.rfind('=');
 987                                 if (equals != std::string::npos)
 988                                 {
 989                                         std::string var = item.substr(0, equals);
 990                                         std::string value = item.substr(equals+1, item.length());
 991                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
 992                                         CapKeys[var] = value;
 993                                 }
 994                         }
 995                 }
 996
 997                 return true;
 998         }
 999
1000         /* This function forces this server to quit, removing this server
1001          * and any users on it (and servers and users below that, etc etc).
1002          * It's very slow and pretty clunky, but luckily unless your network
1003          * is having a REAL bad hair day, this function shouldnt be called
1004          * too many times a month ;-)
1005          */
1006         void SquitServer(std::string &from, TreeServer* Current)
1007         {
1008                 /* recursively squit the servers attached to 'Current'.
1009                  * We're going backwards so we don't remove users
1010                  * while we still need them ;)
1011                  */
1012                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1013                 {
1014                         TreeServer* recursive_server = Current->GetChild(q);
1015                         this->SquitServer(from,recursive_server);
1016                 }
1017                 /* Now we've whacked the kids, whack self */
1018                 num_lost_servers++;
1019                 num_lost_users += Current->QuitUsers(from);
1020         }
1021
1022         /* This is a wrapper function for SquitServer above, which
1023          * does some validation first and passes on the SQUIT to all
1024          * other remaining servers.
1025          */
1026         void Squit(TreeServer* Current,std::string reason)
1027         {
1028                 if ((Current) && (Current != TreeRoot))
1029                 {
1030                         std::deque<std::string> params;
1031                         params.push_back(Current->GetName());
1032                         params.push_back(":"+reason);
1033                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1034                         if (Current->GetParent() == TreeRoot)
1035                         {
1036                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1037                         }
1038                         else
1039                         {
1040                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1041                         }
1042                         num_lost_servers = 0;
1043                         num_lost_users = 0;
1044                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1045                         SquitServer(from, Current);
1046                         Current->Tidy();
1047                         Current->GetParent()->DelChild(Current);
1048                         DELETE(Current);
1049                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1050                 }
1051                 else
1052                 {
1053                         ServerInstance->Log(DEFAULT,"Squit from unknown server");
1054                 }
1055         }
1056
1057         /* FMODE command - server mode with timestamp checks */
1058         bool ForceMode(std::string source, std::deque<std::string> &params)
1059         {
1060                 /* Chances are this is a 1.0 FMODE without TS */
1061                 if (params.size() < 3)
1062                 {
1063                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1064                         return false;
1065                 }
1066
1067                 bool smode = false;
1068                 std::string sourceserv;
1069
1070                 /* Are we dealing with an FMODE from a user, or from a server? */
1071                 userrec* who = this->Instance->FindNick(source);
1072                 if (who)
1073                 {
1074                         /* FMODE from a user, set sourceserv to the users server name */
1075                         sourceserv = who->server;
1076                 }
1077                 else
1078                 {
1079                         /* FMODE from a server, create a fake user to receive mode feedback */
1080                         who = new userrec(this->Instance);
1081                         who->SetFd(FD_MAGIC_NUMBER);
1082                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1083                         sourceserv = source;    /* Set sourceserv to the actual source string */
1084                 }
1085                 const char* modelist[64];
1086                 time_t TS = 0;
1087                 int n = 0;
1088                 memset(&modelist,0,sizeof(modelist));
1089                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1090                 {
1091                         if (q == 1)
1092                         {
1093                                 /* The timestamp is in this position.
1094                                  * We don't want to pass that up to the
1095                                  * server->client protocol!
1096                                  */
1097                                 TS = atoi(params[q].c_str());
1098                         }
1099                         else
1100                         {
1101                                 /* Everything else is fine to append to the modelist */
1102                                 modelist[n++] = params[q].c_str();
1103                         }
1104
1105                 }
1106                 /* Extract the TS value of the object, either userrec or chanrec */
1107                 userrec* dst = this->Instance->FindNick(params[0]);
1108                 chanrec* chan = NULL;
1109                 time_t ourTS = 0;
1110                 if (dst)
1111                 {
1112                         ourTS = dst->age;
1113                 }
1114                 else
1115                 {
1116                         chan = this->Instance->FindChan(params[0]);
1117                         if (chan)
1118                         {
1119                                 ourTS = chan->age;
1120                         }
1121                 }
1122
1123                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1124                  * with parameters.
1125                  */
1126                 if (TS == ourTS)
1127                 {
1128                         ServerInstance->Log(DEBUG,"Entering TS equality check");
1129                         ModeHandler* mh = NULL;
1130                         unsigned long paramptr = 3;
1131                         std::string to_bounce = "";
1132                         std::string to_keep = "";
1133                         std::vector<std::string> params_to_keep;
1134                         std::string params_to_bounce = "";
1135                         bool adding = true;
1136                         char cur_change = 1;
1137                         char old_change = 0;
1138                         char old_bounce_change = 0;
1139                         /* Merge modes, basically do special stuff to mode with params */
1140                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1141                         {
1142                                 switch (*x)
1143                                 {
1144                                         case '-':
1145                                                 adding = false;
1146                                         break;
1147                                         case '+':
1148                                                 adding = true;
1149                                         break;
1150                                         default:
1151                                                 if (adding)
1152                                                 {
1153                                                         /* We only care about whats being set,
1154                                                          * not whats being unset
1155                                                          */
1156                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1157
1158                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1159                                                         {
1160                                                                 /* We only want to do special things to
1161                                                                  * modes with parameters, we are going to rewrite
1162                                                                  * those parameters
1163                                                                  */
1164                                                                 ModePair ret;
1165                                                                 adding ? cur_change = '+' : cur_change = '-';
1166
1167                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1168
1169                                                                 /* The mode is set here, check which we should keep */
1170                                                                 if (ret.first)
1171                                                                 {
1172                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1173
1174                                                                         if (which_to_keep == true)
1175                                                                         {
1176                                                                                 /* Keep ours, bounce theirs:
1177                                                                                  * Send back ours to them and
1178                                                                                  * drop their mode changs
1179                                                                                  */
1180                                                                                 adding ? cur_change = '+' : cur_change = '-';
1181                                                                                 if (cur_change != old_bounce_change)
1182                                                                                         to_bounce += cur_change;
1183                                                                                 to_bounce += *x;
1184                                                                                 old_bounce_change = cur_change;
1185
1186                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1187                                                                                         params_to_bounce.append(" ").append(ret.second);
1188                                                                         }
1189                                                                         else
1190                                                                         {
1191                                                                                 /* Keep theirs: Accept their mode change,
1192                                                                                  * do nothing else
1193                                                                                  */
1194                                                                                 adding ? cur_change = '+' : cur_change = '-';
1195                                                                                 if (cur_change != old_change)
1196                                                                                         to_keep += cur_change;
1197                                                                                 to_keep += *x;
1198                                                                                 old_change = cur_change;
1199
1200                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1201                                                                                         params_to_keep.push_back(params[paramptr]);
1202                                                                         }
1203                                                                 }
1204                                                                 else
1205                                                                 {
1206                                                                         /* Mode isnt set here, we want it */
1207                                                                         adding ? cur_change = '+' : cur_change = '-';
1208                                                                         if (cur_change != old_change)
1209                                                                                 to_keep += cur_change;
1210                                                                         to_keep += *x;
1211                                                                         old_change = cur_change;
1212
1213                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1214                                                                                 params_to_keep.push_back(params[paramptr]);
1215                                                                 }
1216
1217                                                                 paramptr++;
1218                                                         }
1219                                                         else
1220                                                         {
1221                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1222
1223                                                                 if (mh)
1224                                                                 {
1225                                                                         adding ? cur_change = '+' : cur_change = '-';
1226
1227                                                                         /* Just keep this, safe to merge with no checks
1228                                                                          * it has no parameters
1229                                                                          */
1230
1231                                                                         if (cur_change != old_change)
1232                                                                                 to_keep += cur_change;
1233                                                                         to_keep += *x;
1234                                                                         old_change = cur_change;
1235
1236                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1237                                                                         {
1238                                                                                 ServerInstance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1239                                                                                 params_to_keep.push_back(params[paramptr++]);
1240                                                                         }
1241                                                                 }
1242                                                         }
1243                                                 }
1244                                                 else
1245                                                 {
1246                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1247
1248                                                         if (mh)
1249                                                         {
1250                                                                 /* Taking a mode away */
1251                                                                 adding ? cur_change = '+' : cur_change = '-';
1252
1253                                                                 if (cur_change != old_change)
1254                                                                         to_keep += cur_change;
1255                                                                 to_keep += *x;
1256                                                                 old_change = cur_change;
1257
1258                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1259                                                                         params_to_keep.push_back(params[paramptr++]);
1260                                                         }
1261                                                 }
1262                                         break;
1263                                 }
1264                         }
1265
1266                         if (to_bounce.length())
1267                         {
1268                                 std::deque<std::string> newparams;
1269                                 newparams.push_back(params[0]);
1270                                 newparams.push_back(ConvToStr(ourTS));
1271                                 newparams.push_back(to_bounce+params_to_bounce);
1272                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1273                         }
1274
1275                         if (to_keep.length())
1276                         {
1277                                 unsigned int n = 2;
1278                                 unsigned int q = 0;
1279                                 modelist[0] = params[0].c_str();
1280                                 modelist[1] = to_keep.c_str();
1281
1282                                 if (params_to_keep.size() > 2)
1283                                 {
1284                                         for (q = 2; (q < params_to_keep.size()) && (q < 64); q++)
1285                                         {
1286                                                 ServerInstance->Log(DEBUG,"Item %d of %d", q, params_to_keep.size());
1287                                                 modelist[n++] = params_to_keep[q].c_str();
1288                                         }
1289                                 }
1290
1291                                 if (smode)
1292                                 {
1293                                         ServerInstance->Log(DEBUG,"Send mode");
1294                                         this->Instance->SendMode(modelist, n+2, who);
1295                                 }
1296                                 else
1297                                 {
1298                                         ServerInstance->Log(DEBUG,"Send mode client");
1299                                         this->Instance->CallCommandHandler("MODE", modelist, n+2, who);
1300                                 }
1301
1302                                 /* HOT POTATO! PASS IT ON! */
1303                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1304                         }
1305                 }
1306                 else
1307                 /* U-lined servers always win regardless of their TS */
1308                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1309                 {
1310                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1311                          * SHOULD accept it, if its clock is right.
1312                          *
1313                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1314                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1315                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1316                          *
1317                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1318                          * writing the code. It took me a while to come up with this solution.
1319                          *
1320                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1321                          */
1322
1323                         std::deque<std::string> newparams;      /* New parameter list we send back */
1324                         newparams.push_back(params[0]);         /* Target, user or channel */
1325                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1326                         newparams.push_back("");                /* This contains the mode string. For now
1327                                                                  * it's empty, we fill it below.
1328                                                                  */
1329
1330                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1331                          * set to avoid a desync here.
1332                          */
1333                         std::string modebounce = "";
1334                         bool adding = true;
1335                         unsigned int t = 3;
1336                         ModeHandler* mh = NULL;
1337                         char cur_change = 1;
1338                         char old_change = 0;
1339                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1340                         {
1341                                 /* Iterate over all mode chars in the sent set */
1342                                 switch (*x)
1343                                 {
1344                                         /* Adding or subtracting modes? */
1345                                         case '-':
1346                                                 adding = false;
1347                                         break;
1348                                         case '+':
1349                                                 adding = true;
1350                                         break;
1351                                         default:
1352                                                 /* Find the mode handler for this mode */
1353                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1354
1355                                                 /* Got a mode handler?
1356                                                  * This also prevents us bouncing modes we have no handler for.
1357                                                  */
1358                                                 if (mh)
1359                                                 {
1360                                                         ModePair ret;
1361                                                         std::string p = "";
1362
1363                                                         /* Does the mode require a parameter right now?
1364                                                          * If it does, fetch it if we can
1365                                                          */
1366                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1367                                                                 p = params[t++];
1368
1369                                                         /* Call the ModeSet method to determine if its set with the
1370                                                          * given parameter here or not.
1371                                                          */
1372                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1373
1374                                                         /* XXX: Really. Dont ask.
1375                                                          * Determine from if its set combined with what the current
1376                                                          * 'state' is (adding or not) as to wether we should 'invert'
1377                                                          * or 'reinforce' the mode change
1378                                                          */
1379                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1380
1381                                                         /* Quickly determine if we have 'flipped' from + to -,
1382                                                          * or - to +, to prevent unneccessary +/- chars in the
1383                                                          * output string that waste bandwidth
1384                                                          */
1385                                                         if (cur_change != old_change)
1386                                                                 modebounce += cur_change;
1387                                                         old_change = cur_change;
1388
1389                                                         /* Add the mode character to the output string */
1390                                                         modebounce += mh->GetModeChar();
1391
1392                                                         /* We got a parameter back from ModeHandler::ModeSet,
1393                                                          * are we supposed to be sending one out right now?
1394                                                          */
1395                                                         if (ret.second.length())
1396                                                         {
1397                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1398                                                                         /* Yes we're supposed to be sending out
1399                                                                          * the parameter. Make sure it goes
1400                                                                          */
1401                                                                         newparams.push_back(ret.second);
1402                                                         }
1403
1404                                                 }
1405                                         break;
1406                                 }
1407                         }
1408
1409                         /* Update the parameters for FMODE with the new 'bounced' string */
1410                         newparams[2] = modebounce;
1411                         /* Only send it back the way it came, no need to send it anywhere else */
1412                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1413                         ServerInstance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1414                 }
1415                 else
1416                 {
1417                         ServerInstance->Log(DEBUG,"Allow modes, TS lower for sender");
1418                         /* The server was ulined, but something iffy is up with the TS.
1419                          * Sound the alarm bells!
1420                          */
1421                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1422                         {
1423                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1424                         }
1425                         /* Allow the mode, route it to either server or user command handling */
1426                         if (smode)
1427                                 this->Instance->SendMode(modelist,n,who);
1428                         else
1429                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1430
1431                         /* HOT POTATO! PASS IT ON! */
1432                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1433                 }
1434                 /* Are we supposed to free the userrec? */
1435                 if (smode)
1436                         DELETE(who);
1437
1438                 return true;
1439         }
1440
1441         /* FTOPIC command */
1442         bool ForceTopic(std::string source, std::deque<std::string> &params)
1443         {
1444                 if (params.size() != 4)
1445                         return true;
1446                 time_t ts = atoi(params[1].c_str());
1447                 std::string nsource = source;
1448
1449                 chanrec* c = this->Instance->FindChan(params[0]);
1450                 if (c)
1451                 {
1452                         if ((ts >= c->topicset) || (!*c->topic))
1453                         {
1454                                 std::string oldtopic = c->topic;
1455                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1456                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1457                                 c->topicset = ts;
1458                                 /* if the topic text is the same as the current topic,
1459                                  * dont bother to send the TOPIC command out, just silently
1460                                  * update the set time and set nick.
1461                                  */
1462                                 if (oldtopic != params[3])
1463                                 {
1464                                         userrec* user = this->Instance->FindNick(source);
1465                                         if (!user)
1466                                         {
1467                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1468                                         }
1469                                         else
1470                                         {
1471                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1472                                                 nsource = user->server;
1473                                         }
1474                                         /* all done, send it on its way */
1475                                         params[3] = ":" + params[3];
1476                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1477                                 }
1478                         }
1479
1480                 }
1481
1482                 return true;
1483         }
1484
1485         /* FJOIN, similar to unreal SJOIN */
1486         bool ForceJoin(std::string source, std::deque<std::string> &params)
1487         {
1488                 if (params.size() < 3)
1489                         return true;
1490
1491                 char first[MAXBUF];
1492                 char modestring[MAXBUF];
1493                 char* mode_users[127];
1494                 memset(&mode_users,0,sizeof(mode_users));
1495                 mode_users[0] = first;
1496                 mode_users[1] = modestring;
1497                 strcpy(modestring,"+");
1498                 unsigned int modectr = 2;
1499
1500                 userrec* who = NULL;
1501                 std::string channel = params[0];
1502                 time_t TS = atoi(params[1].c_str());
1503                 char* key = "";
1504
1505                 chanrec* chan = this->Instance->FindChan(channel);
1506                 if (chan)
1507                 {
1508                         key = chan->key;
1509                 }
1510                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1511
1512                 /* default is a high value, which if we dont have this
1513                  * channel will let the other side apply their modes.
1514                  */
1515                 time_t ourTS = time(NULL)+600;
1516                 chanrec* us = this->Instance->FindChan(channel);
1517                 if (us)
1518                 {
1519                         ourTS = us->age;
1520                 }
1521
1522                 ServerInstance->Log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1523
1524                 irc::tokenstream users(params[2]);
1525                 std::string item = "*";
1526
1527                 /* do this first, so our mode reversals are correctly received by other servers
1528                  * if there is a TS collision.
1529                  */
1530                 params[2] = ":" + params[2];
1531                 DoOneToAllButSender(source,"FJOIN",params,source);
1532                 while (item != "")
1533                 {
1534                         item = users.GetToken();
1535                         /* process one user at a time, applying modes. */
1536                         char* usr = (char*)item.c_str();
1537                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1538                          * (is this even possible?) */
1539                         if (usr && *usr)
1540                         {
1541                                 char* permissions = usr;
1542                                 int ntimes = 0;
1543                                 while ((*permissions) && (*permissions != ','))
1544                                 {
1545                                         ModeHandler* mh = ServerInstance->Modes->FindPrefix(*permissions);
1546                                         if (mh)
1547                                         {
1548                                                 ntimes++;
1549                                                 charlcat(modestring,mh->GetModeChar(),MAXBUF);
1550                                         }
1551                                         else
1552                                         {
1553                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",mh->GetPrefix());
1554                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+mh->GetModeChar()+"' in FJOIN");
1555                                                 return false;
1556                                         }
1557                                         usr++;
1558                                         permissions++;
1559                                 }
1560                                 usr++;
1561
1562                                 /* Did they get any modes? How many times? */
1563                                 for (int k = 0; k < ntimes; k++)
1564                                         mode_users[modectr++] = strdup(usr); // XXX
1565
1566                                 who = this->Instance->FindNick(usr);
1567                                 if (who)
1568                                 {
1569                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, key);
1570                                         if (modectr >= (MAXMODES-1))
1571                                         {
1572                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1573                                                  * if there are more than MAXMODES to go.
1574                                                  */
1575                                                 if ((ourTS >= TS) || (this->Instance->ULine(who->server)))
1576                                                 {
1577                                                         /* We also always let u-lined clients win, no matter what the TS value */
1578                                                         ServerInstance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1579                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1580                                                         if (ourTS != TS)
1581                                                         {
1582                                                                 ServerInstance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1583                                                                 us->age = TS;
1584                                                                 ourTS = TS;
1585                                                         }
1586                                                 }
1587                                                 else
1588                                                 {
1589                                                         ServerInstance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1590                                                         /* bouncy bouncy! */
1591                                                         std::deque<std::string> params;
1592                                                         /* modes are now being UNSET... */
1593                                                         *mode_users[1] = '-';
1594                                                         for (unsigned int x = 0; x < modectr; x++)
1595                                                         {
1596                                                                 if (x == 1)
1597                                                                 {
1598                                                                         params.push_back(ConvToStr(us->age));
1599                                                                 }
1600                                                                 params.push_back(mode_users[x]);
1601
1602                                                         }
1603                                                         // tell everyone to bounce the modes. bad modes, bad!
1604                                                         DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1605                                                 }
1606                                                 strcpy(mode_users[1],"+");
1607                                                 for (unsigned int f = 2; f < modectr; f++)
1608                                                         free(mode_users[f]);
1609                                                 modectr = 2;
1610                                         }
1611                                 }
1612                                 else
1613                                 {
1614                                         for (unsigned int f = 2; f < modectr; f++)
1615                                                 free(mode_users[f]);
1616
1617                                         this->WriteLine("ERROR :Invalid user '"+std::string(usr)+"' in FJOIN to '"+channel+"'");
1618                                         return false;
1619                                 }
1620                         }
1621                 }
1622                 /* there werent enough modes built up to flush it during FJOIN,
1623                  * or, there are a number left over. flush them out.
1624                  */
1625                 if ((modectr > 2) && (who) && (us))
1626                 {
1627                         if (ourTS >= TS)
1628                         {
1629                                 ServerInstance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1630                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1631                                 if (ourTS != TS)
1632                                 {
1633                                         ServerInstance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1634                                         us->age = TS;
1635                                         ourTS = TS;
1636                                 }
1637                         }
1638                         else
1639                         {
1640                                 ServerInstance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1641                                 std::deque<std::string> params;
1642                                 *mode_users[1] = '-';
1643                                 for (unsigned int x = 0; x < modectr; x++)
1644                                 {
1645                                         if (x == 1)
1646                                         {
1647                                                 params.push_back(ConvToStr(us->age));
1648                                         }
1649                                         params.push_back(mode_users[x]);
1650                                 }
1651                                 DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1652                         }
1653
1654                         for (unsigned int f = 2; f < modectr; f++)
1655                                 free(mode_users[f]);
1656                 }
1657                 return true;
1658         }
1659
1660         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1661         {
1662                 if (params.size() >= 2)
1663                 {
1664                         chanrec* c = this->Instance->FindChan(params[0]);
1665                         if (c)
1666                         {
1667                                 time_t theirTS = atoi(params[1].c_str());
1668                                 time_t ourTS = c->age;
1669                                 if (ourTS >= theirTS)
1670                                 {
1671                                         ServerInstance->Log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1672                                         c->age = theirTS;
1673                                 }
1674                         }
1675                 }
1676                 DoOneToAllButSender(this->Instance->Config->ServerName,"SYNCTS",params,source);
1677                 return true;
1678         }
1679
1680         /* NICK command */
1681         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1682         {
1683                 if (params.size() < 8)
1684                         return true;
1685                 if (params.size() > 8)
1686                 {
1687                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1688                         return true;
1689                 }
1690                 // NICK age nick host dhost ident +modes ip :gecos
1691                 //       0    1   2     3     4      5   6     7
1692                 time_t age = atoi(params[0].c_str());
1693
1694                 /* This used to have a pretty craq'y loop doing the same thing,
1695                  * now we just let the STL do the hard work (more efficiently)
1696                  */
1697                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1698
1699                 const char* tempnick = params[1].c_str();
1700                 ServerInstance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1701
1702                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1703
1704                 if (iter != this->Instance->clientlist.end())
1705                 {
1706                         // nick collision
1707                         ServerInstance->Log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1708                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1709                         return true;
1710                 }
1711
1712                 userrec* _new = new userrec(this->Instance);
1713                 this->Instance->clientlist[tempnick] = _new;
1714                 _new->SetFd(FD_MAGIC_NUMBER);
1715                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1716                 strlcpy(_new->host, params[2].c_str(),63);
1717                 strlcpy(_new->dhost, params[3].c_str(),63);
1718                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1719                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1720                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1721                 _new->registered = REG_ALL;
1722                 _new->signon = age;
1723
1724                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1725                         _new->modes[(*v)-65] = 1;
1726
1727 #ifdef SUPPORT_IP6LINKS
1728                 if (params[6].find_first_of(":") != std::string::npos)
1729                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1730                 else
1731 #endif
1732                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1733
1734                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1735
1736                 params[7] = ":" + params[7];
1737                 DoOneToAllButSender(source,"NICK",params,source);
1738
1739                 // Increment the Source Servers User Count..
1740                 TreeServer* SourceServer = FindServer(source);
1741                 if (SourceServer)
1742                 {
1743                         ServerInstance->Log(DEBUG,"Found source server of %s",_new->nick);
1744                         SourceServer->AddUserCount();
1745                 }
1746
1747                 return true;
1748         }
1749
1750         /* Send one or more FJOINs for a channel of users.
1751          * If the length of a single line is more than 480-NICKMAX
1752          * in length, it is split over multiple lines.
1753          */
1754         void SendFJoins(TreeServer* Current, chanrec* c)
1755         {
1756                 ServerInstance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1757                 char list[MAXBUF];
1758                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1759
1760                 size_t dlen, curlen;
1761                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1762                 int numusers = 0;
1763                 char* ptr = list + dlen;
1764
1765                 CUList *ulist = c->GetUsers();
1766                 std::vector<userrec*> specific_halfop;
1767                 std::vector<userrec*> specific_voice;
1768                 std::string modes = "";
1769                 std::string params = "";
1770
1771                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1772                 {
1773                         // The first parameter gets a : before it
1774                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1775
1776                         curlen += ptrlen;
1777                         ptr += ptrlen;
1778
1779                         numusers++;
1780
1781                         if (curlen > (480-NICKMAX))
1782                         {
1783                                 this->WriteLine(list);
1784                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1785                                 ptr = list + dlen;
1786                                 ptrlen = 0;
1787                                 numusers = 0;
1788                         }
1789                 }
1790
1791                 if (numusers)
1792                         this->WriteLine(list);
1793
1794                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1795                 {
1796                         modes.append("b");
1797                         params.append(b->data).append(" ");
1798                 }
1799                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1800         }
1801
1802         /* Send G, Q, Z and E lines */
1803         void SendXLines(TreeServer* Current)
1804         {
1805                 char data[MAXBUF];
1806                 std::string n = this->Instance->Config->ServerName;
1807                 const char* sn = n.c_str();
1808                 int iterations = 0;
1809                 /* Yes, these arent too nice looking, but they get the job done */
1810                 for (std::vector<ZLine>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1811                 {
1812                         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);
1813                         this->WriteLine(data);
1814                 }
1815                 for (std::vector<QLine>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1816                 {
1817                         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);
1818                         this->WriteLine(data);
1819                 }
1820                 for (std::vector<GLine>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1821                 {
1822                         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);
1823                         this->WriteLine(data);
1824                 }
1825                 for (std::vector<ELine>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1826                 {
1827                         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);
1828                         this->WriteLine(data);
1829                 }
1830                 for (std::vector<ZLine>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1831                 {
1832                         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);
1833                         this->WriteLine(data);
1834                 }
1835                 for (std::vector<QLine>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1836                 {
1837                         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);
1838                         this->WriteLine(data);
1839                 }
1840                 for (std::vector<GLine>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1841                 {
1842                         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);
1843                         this->WriteLine(data);
1844                 }
1845                 for (std::vector<ELine>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1846                 {
1847                         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);
1848                         this->WriteLine(data);
1849                 }
1850         }
1851
1852         /* Send channel modes and topics */
1853         void SendChannelModes(TreeServer* Current)
1854         {
1855                 char data[MAXBUF];
1856                 std::deque<std::string> list;
1857                 int iterations = 0;
1858                 std::string n = this->Instance->Config->ServerName;
1859                 const char* sn = n.c_str();
1860                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1861                 {
1862                         SendFJoins(Current, c->second);
1863                         if (*c->second->topic)
1864                         {
1865                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1866                                 this->WriteLine(data);
1867                         }
1868                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1869                         list.clear();
1870                         c->second->GetExtList(list);
1871                         for (unsigned int j = 0; j < list.size(); j++)
1872                         {
1873                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1874                         }
1875                 }
1876         }
1877
1878         /* send all users and their oper state/modes */
1879         void SendUsers(TreeServer* Current)
1880         {
1881                 char data[MAXBUF];
1882                 std::deque<std::string> list;
1883                 int iterations = 0;
1884                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1885                 {
1886                         if (u->second->registered == REG_ALL)
1887                         {
1888                                 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
1889                                 this->WriteLine(data);
1890                                 if (*u->second->oper)
1891                                 {
1892                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1893                                 }
1894                                 if (*u->second->awaymsg)
1895                                 {
1896                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1897                                 }
1898                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1899                                 list.clear();
1900                                 u->second->GetExtList(list);
1901                                 for (unsigned int j = 0; j < list.size(); j++)
1902                                 {
1903                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1904                                 }
1905                         }
1906                 }
1907         }
1908
1909         /* This function is called when we want to send a netburst to a local
1910          * server. There is a set order we must do this, because for example
1911          * users require their servers to exist, and channels require their
1912          * users to exist. You get the idea.
1913          */
1914         void DoBurst(TreeServer* s)
1915         {
1916                 std::string burst = "BURST "+ConvToStr(time(NULL));
1917                 std::string endburst = "ENDBURST";
1918                 // Because by the end of the netburst, it  could be gone!
1919                 std::string name = s->GetName();
1920                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
1921                 this->WriteLine(burst);
1922                 /* send our version string */
1923                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1924                 /* Send server tree */
1925                 this->SendServers(TreeRoot,s,1);
1926                 /* Send users and their oper status */
1927                 this->SendUsers(s);
1928                 /* Send everything else (channel modes, xlines etc) */
1929                 this->SendChannelModes(s);
1930                 this->SendXLines(s);
1931                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1932                 this->WriteLine(endburst);
1933                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1934         }
1935
1936         /* This function is called when we receive data from a remote
1937          * server. We buffer the data in a std::string (it doesnt stay
1938          * there for long), reading using InspSocket::Read() which can
1939          * read up to 16 kilobytes in one operation.
1940          *
1941          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1942          * THE SOCKET OBJECT FOR US.
1943          */
1944         virtual bool OnDataReady()
1945         {
1946                 char* data = this->Read();
1947                 /* Check that the data read is a valid pointer and it has some content */
1948                 if (data && *data)
1949                 {
1950                         this->in_buffer.append(data);
1951                         /* While there is at least one new line in the buffer,
1952                          * do something useful (we hope!) with it.
1953                          */
1954                         while (in_buffer.find("\n") != std::string::npos)
1955                         {
1956                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1957                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1958                                 if (ret.find("\r") != std::string::npos)
1959                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1960                                 /* Process this one, abort if it
1961                                  * didnt return true.
1962                                  */
1963                                 if (this->ctx_in)
1964                                 {
1965                                         char out[1024];
1966                                         char result[1024];
1967                                         memset(result,0,1024);
1968                                         memset(out,0,1024);
1969                                         ServerInstance->Log(DEBUG,"Original string '%s'",ret.c_str());
1970                                         /* ERROR + CAPAB is still allowed unencryped */
1971                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1972                                         {
1973                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1974                                                 if ((nbytes > 0) && (nbytes < 1024))
1975                                                 {
1976                                                         ServerInstance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1977                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1978                                                         for (int t = 0; t < nbytes; t++)
1979                                                                 if (result[t] == '\7') result[t] = 0;
1980                                                         ret = result;
1981                                                 }
1982                                         }
1983                                 }
1984                                 if (!this->ProcessLine(ret))
1985                                 {
1986                                         ServerInstance->Log(DEBUG,"ProcessLine says no!");
1987                                         return false;
1988                                 }
1989                         }
1990                         return true;
1991                 }
1992                 /* EAGAIN returns an empty but non-NULL string, so this
1993                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1994                  */
1995                 return (data && !*data);
1996         }
1997
1998         int WriteLine(std::string line)
1999         {
2000                 ServerInstance->Log(DEBUG,"OUT: %s",line.c_str());
2001                 if (this->ctx_out)
2002                 {
2003                         char result[10240];
2004                         char result64[10240];
2005                         if (this->keylength)
2006                         {
2007                                 // pad it to the key length
2008                                 int n = this->keylength - (line.length() % this->keylength);
2009                                 if (n)
2010                                 {
2011                                         ServerInstance->Log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);
2012                                         line.append(n,'\7');
2013                                 }
2014                         }
2015                         unsigned int ll = line.length();
2016                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2017                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2018                         line = result64;
2019                         //int from64tobits(char *out, const char *in, int maxlen);
2020                 }
2021                 return this->Write(line + "\r\n");
2022         }
2023
2024         /* Handle ERROR command */
2025         bool Error(std::deque<std::string> &params)
2026         {
2027                 if (params.size() < 1)
2028                         return false;
2029                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2030                 /* we will return false to cause the socket to close. */
2031                 return false;
2032         }
2033
2034         /* remote MOTD. leet, huh? */
2035         bool Motd(std::string prefix, std::deque<std::string> &params)
2036         {
2037                 if (params.size() > 0)
2038                 {
2039                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2040                         {
2041                                 /* It's for our server */
2042                                 string_list results;
2043                                 userrec* source = this->Instance->FindNick(prefix);
2044
2045                                 if (source)
2046                                 {
2047                                         std::deque<std::string> par;
2048                                         par.push_back(prefix);
2049                                         par.push_back("");
2050
2051                                         if (!ServerInstance->Config->MOTD.size())
2052                                         {
2053                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2054                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2055                                                 return true;
2056                                         }
2057
2058                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 375 "+source->nick+" :"+ServerInstance->Config->ServerName+" message of the day";
2059                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2060
2061                                         for (unsigned int i = 0; i < ServerInstance->Config->MOTD.size(); i++)
2062                                         {
2063                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 372 "+source->nick+" :- "+ServerInstance->Config->MOTD[i];
2064                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2065                                         }
2066
2067                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2068                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2069                                 }
2070                         }
2071                         else
2072                         {
2073                                 /* Pass it on */
2074                                 userrec* source = this->Instance->FindNick(prefix);
2075                                 if (source)
2076                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2077                         }
2078                 }
2079                 return true;
2080         }
2081
2082         /* remote ADMIN. leet, huh? */
2083         bool Admin(std::string prefix, std::deque<std::string> &params)
2084         {
2085                 if (params.size() > 0)
2086                 {
2087                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2088                         {
2089                                 /* It's for our server */
2090                                 string_list results;
2091                                 userrec* source = this->Instance->FindNick(prefix);
2092
2093                                 if (source)
2094                                 {
2095                                         std::deque<std::string> par;
2096                                         par.push_back(prefix);
2097                                         par.push_back("");
2098
2099                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+ServerInstance->Config->ServerName;
2100                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2101
2102                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 257 "+source->nick+" :Name     - "+ServerInstance->Config->AdminName;
2103                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2104
2105                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+ServerInstance->Config->AdminNick;
2106                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2107
2108                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+ServerInstance->Config->AdminEmail;
2109                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2110                                 }
2111                         }
2112                         else
2113                         {
2114                                 /* Pass it on */
2115                                 userrec* source = this->Instance->FindNick(prefix);
2116                                 if (source)
2117                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2118                         }
2119                 }
2120                 return true;
2121         }
2122
2123         bool Stats(std::string prefix, std::deque<std::string> &params)
2124         {
2125                 /* Get the reply to a STATS query if it matches this servername,
2126                  * and send it back as a load of PUSH queries
2127                  */
2128                 if (params.size() > 1)
2129                 {
2130                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2131                         {
2132                                 /* It's for our server */
2133                                 string_list results;
2134                                 userrec* source = this->Instance->FindNick(prefix);
2135                                 if (source)
2136                                 {
2137                                         std::deque<std::string> par;
2138                                         par.push_back(prefix);
2139                                         par.push_back("");
2140                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2141                                         for (size_t i = 0; i < results.size(); i++)
2142                                         {
2143                                                 par[1] = "::" + results[i];
2144                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2145                                         }
2146                                 }
2147                         }
2148                         else
2149                         {
2150                                 /* Pass it on */
2151                                 userrec* source = this->Instance->FindNick(prefix);
2152                                 if (source)
2153                                         DoOneToOne(prefix, "STATS", params, params[1]);
2154                         }
2155                 }
2156                 return true;
2157         }
2158
2159
2160         /* Because the core won't let users or even SERVERS set +o,
2161          * we use the OPERTYPE command to do this.
2162          */
2163         bool OperType(std::string prefix, std::deque<std::string> &params)
2164         {
2165                 if (params.size() != 1)
2166                 {
2167                         ServerInstance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2168                         return true;
2169                 }
2170                 std::string opertype = params[0];
2171                 userrec* u = this->Instance->FindNick(prefix);
2172                 if (u)
2173                 {
2174                         u->modes[UM_OPERATOR] = 1;
2175                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2176                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2177                 }
2178                 return true;
2179         }
2180
2181         /* Because Andy insists that services-compatible servers must
2182          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2183          */
2184         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2185         {
2186                 if (params.size() < 3)
2187                         return true;
2188
2189                 userrec* u = this->Instance->FindNick(params[0]);
2190
2191                 if (u)
2192                 {
2193                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2194                         if (IS_LOCAL(u))
2195                         {
2196                                 std::deque<std::string> par;
2197                                 par.push_back(params[1]);
2198                                 /* This is not required as one is sent in OnUserPostNick below
2199                                  */
2200                                 //DoOneToMany(u->nick,"NICK",par);
2201                                 if (!u->ForceNickChange(params[1].c_str()))
2202                                 {
2203                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2204                                         return true;
2205                                 }
2206                                 u->age = atoi(params[2].c_str());
2207                         }
2208                 }
2209                 return true;
2210         }
2211
2212         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2213         {
2214                 if (params.size() < 2)
2215                         return true;
2216
2217                 userrec* u = this->Instance->FindNick(params[0]);
2218
2219                 if (u)
2220                 {
2221                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2222                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2223                 }
2224                 return true;
2225         }
2226
2227         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2228         {
2229                 if (params.size() < 1)
2230                         return false;
2231
2232                 std::string servermask = params[0];
2233
2234                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2235                 {
2236                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2237                         this->Instance->RehashServer();
2238                         ReadConfiguration(false);
2239                 }
2240                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2241                 return true;
2242         }
2243
2244         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2245         {
2246                 if (params.size() != 2)
2247                         return true;
2248
2249                 std::string nick = params[0];
2250                 userrec* u = this->Instance->FindNick(prefix);
2251                 userrec* who = this->Instance->FindNick(nick);
2252
2253                 if (who)
2254                 {
2255                         /* Prepend kill source, if we don't have one */
2256                         std::string sourceserv = prefix;
2257                         if (u)
2258                         {
2259                                 sourceserv = u->server;
2260                         }
2261                         if (*(params[1].c_str()) != '[')
2262                         {
2263                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2264                         }
2265                         std::string reason = params[1];
2266                         params[1] = ":" + params[1];
2267                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2268                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2269                         userrec::QuitUser(this->Instance,who,reason);
2270                 }
2271                 return true;
2272         }
2273
2274         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2275         {
2276                 if (params.size() < 1)
2277                         return true;
2278
2279                 if (params.size() == 1)
2280                 {
2281                         TreeServer* ServerSource = FindServer(prefix);
2282                         if (ServerSource)
2283                         {
2284                                 ServerSource->SetPingFlag();
2285                         }
2286                 }
2287                 else
2288                 {
2289                         std::string forwardto = params[1];
2290                         if (forwardto == this->Instance->Config->ServerName)
2291                         {
2292                                 /*
2293                                  * this is a PONG for us
2294                                  * if the prefix is a user, check theyre local, and if they are,
2295                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2296                                  * Services might want to send these s->s, but we dont need to yet.
2297                                  */
2298                                 userrec* u = this->Instance->FindNick(prefix);
2299
2300                                 if (u)
2301                                 {
2302                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2303                                 }
2304                         }
2305                         else
2306                         {
2307                                 // not for us, pass it on :)
2308                                 DoOneToOne(prefix,"PONG",params,forwardto);
2309                         }
2310                 }
2311
2312                 return true;
2313         }
2314
2315         bool MetaData(std::string prefix, std::deque<std::string> &params)
2316         {
2317                 if (params.size() < 3)
2318                         return true;
2319
2320                 TreeServer* ServerSource = FindServer(prefix);
2321
2322                 if (ServerSource)
2323                 {
2324                         if (params[0] == "*")
2325                         {
2326                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2327                         }
2328                         else if (*(params[0].c_str()) == '#')
2329                         {
2330                                 chanrec* c = this->Instance->FindChan(params[0]);
2331                                 if (c)
2332                                 {
2333                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2334                                 }
2335                         }
2336                         else if (*(params[0].c_str()) != '#')
2337                         {
2338                                 userrec* u = this->Instance->FindNick(params[0]);
2339                                 if (u)
2340                                 {
2341                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2342                                 }
2343                         }
2344                 }
2345
2346                 params[2] = ":" + params[2];
2347                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2348                 return true;
2349         }
2350
2351         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2352         {
2353                 if (params.size() < 1)
2354                         return true;
2355
2356                 TreeServer* ServerSource = FindServer(prefix);
2357
2358                 if (ServerSource)
2359                 {
2360                         ServerSource->SetVersion(params[0]);
2361                 }
2362                 params[0] = ":" + params[0];
2363                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2364                 return true;
2365         }
2366
2367         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2368         {
2369                 if (params.size() < 1)
2370                         return true;
2371
2372                 userrec* u = this->Instance->FindNick(prefix);
2373
2374                 if (u)
2375                 {
2376                         u->ChangeDisplayedHost(params[0].c_str());
2377                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2378                 }
2379                 return true;
2380         }
2381
2382         bool AddLine(std::string prefix, std::deque<std::string> &params)
2383         {
2384                 if (params.size() < 6)
2385                         return true;
2386
2387                 bool propogate = false;
2388
2389                 switch (*(params[0].c_str()))
2390                 {
2391                         case 'Z':
2392                                 propogate = ServerInstance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2393                                 ServerInstance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2394                         break;
2395                         case 'Q':
2396                                 propogate = ServerInstance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2397                                 ServerInstance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2398                         break;
2399                         case 'E':
2400                                 propogate = ServerInstance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2401                                 ServerInstance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2402                         break;
2403                         case 'G':
2404                                 propogate = ServerInstance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2405                                 ServerInstance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2406                         break;
2407                         case 'K':
2408                                 propogate = ServerInstance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2409                         break;
2410                         default:
2411                                 /* Just in case... */
2412                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2413                                 propogate = false;
2414                         break;
2415                 }
2416
2417                 /* Send it on its way */
2418                 if (propogate)
2419                 {
2420                         if (atoi(params[4].c_str()))
2421                         {
2422                                 this->Instance->SNO->WriteToSnoMask('x',"%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());
2423                         }
2424                         else
2425                         {
2426                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2427                         }
2428                         params[5] = ":" + params[5];
2429                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2430                 }
2431                 if (!this->bursting)
2432                 {
2433                         ServerInstance->Log(DEBUG,"Applying lines...");
2434                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2435                 }
2436                 return true;
2437         }
2438
2439         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2440         {
2441                 if (params.size() < 1)
2442                         return true;
2443
2444                 userrec* u = this->Instance->FindNick(prefix);
2445
2446                 if (u)
2447                 {
2448                         u->ChangeName(params[0].c_str());
2449                         params[0] = ":" + params[0];
2450                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2451                 }
2452                 return true;
2453         }
2454
2455         bool Whois(std::string prefix, std::deque<std::string> &params)
2456         {
2457                 if (params.size() < 1)
2458                         return true;
2459
2460                 ServerInstance->Log(DEBUG,"In IDLE command");
2461                 userrec* u = this->Instance->FindNick(prefix);
2462
2463                 if (u)
2464                 {
2465                         ServerInstance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2466                         // an incoming request
2467                         if (params.size() == 1)
2468                         {
2469                                 userrec* x = this->Instance->FindNick(params[0]);
2470                                 if ((x) && (IS_LOCAL(x)))
2471                                 {
2472                                         userrec* x = this->Instance->FindNick(params[0]);
2473                                         ServerInstance->Log(DEBUG,"Got IDLE");
2474                                         char signon[MAXBUF];
2475                                         char idle[MAXBUF];
2476                                         ServerInstance->Log(DEBUG,"Sending back IDLE 3");
2477                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2478                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2479                                         std::deque<std::string> par;
2480                                         par.push_back(prefix);
2481                                         par.push_back(signon);
2482                                         par.push_back(idle);
2483                                         // ours, we're done, pass it BACK
2484                                         DoOneToOne(params[0],"IDLE",par,u->server);
2485                                 }
2486                                 else
2487                                 {
2488                                         // not ours pass it on
2489                                         DoOneToOne(prefix,"IDLE",params,x->server);
2490                                 }
2491                         }
2492                         else if (params.size() == 3)
2493                         {
2494                                 std::string who_did_the_whois = params[0];
2495                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2496                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2497                                 {
2498                                         ServerInstance->Log(DEBUG,"Got final IDLE");
2499                                         // an incoming reply to a whois we sent out
2500                                         std::string nick_whoised = prefix;
2501                                         unsigned long signon = atoi(params[1].c_str());
2502                                         unsigned long idle = atoi(params[2].c_str());
2503                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2504                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2505                                 }
2506                                 else
2507                                 {
2508                                         // not ours, pass it on
2509                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2510                                 }
2511                         }
2512                 }
2513                 return true;
2514         }
2515
2516         bool Push(std::string prefix, std::deque<std::string> &params)
2517         {
2518                 if (params.size() < 2)
2519                         return true;
2520
2521                 userrec* u = this->Instance->FindNick(params[0]);
2522
2523                 if (!u)
2524                         return true;
2525
2526                 if (IS_LOCAL(u))
2527                 {
2528                         u->Write(params[1]);
2529                 }
2530                 else
2531                 {
2532                         // continue the raw onwards
2533                         params[1] = ":" + params[1];
2534                         DoOneToOne(prefix,"PUSH",params,u->server);
2535                 }
2536                 return true;
2537         }
2538
2539         bool Time(std::string prefix, std::deque<std::string> &params)
2540         {
2541                 // :source.server TIME remote.server sendernick
2542                 // :remote.server TIME source.server sendernick TS
2543                 if (params.size() == 2)
2544                 {
2545                         // someone querying our time?
2546                         if (this->Instance->Config->ServerName == params[0])
2547                         {
2548                                 userrec* u = this->Instance->FindNick(params[1]);
2549                                 if (u)
2550                                 {
2551                                         char curtime[256];
2552                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2553                                         params.push_back(curtime);
2554                                         params[0] = prefix;
2555                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2556                                 }
2557                         }
2558                         else
2559                         {
2560                                 // not us, pass it on
2561                                 userrec* u = this->Instance->FindNick(params[1]);
2562                                 if (u)
2563                                         DoOneToOne(prefix,"TIME",params,params[0]);
2564                         }
2565                 }
2566                 else if (params.size() == 3)
2567                 {
2568                         // a response to a previous TIME
2569                         userrec* u = this->Instance->FindNick(params[1]);
2570                         if ((u) && (IS_LOCAL(u)))
2571                         {
2572                         time_t rawtime = atol(params[2].c_str());
2573                         struct tm * timeinfo;
2574                         timeinfo = localtime(&rawtime);
2575                                 char tms[26];
2576                                 snprintf(tms,26,"%s",asctime(timeinfo));
2577                                 tms[24] = 0;
2578                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2579                         }
2580                         else
2581                         {
2582                                 if (u)
2583                                         DoOneToOne(prefix,"TIME",params,u->server);
2584                         }
2585                 }
2586                 return true;
2587         }
2588
2589         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2590         {
2591                 if (params.size() < 1)
2592                         return true;
2593
2594                 if (params.size() == 1)
2595                 {
2596                         std::string stufftobounce = params[0];
2597                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2598                         return true;
2599                 }
2600                 else
2601                 {
2602                         std::string forwardto = params[1];
2603                         if (forwardto == this->Instance->Config->ServerName)
2604                         {
2605                                 // this is a ping for us, send back PONG to the requesting server
2606                                 params[1] = params[0];
2607                                 params[0] = forwardto;
2608                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2609                         }
2610                         else
2611                         {
2612                                 // not for us, pass it on :)
2613                                 DoOneToOne(prefix,"PING",params,forwardto);
2614                         }
2615                         return true;
2616                 }
2617         }
2618
2619         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2620         {
2621                 if (params.size() < 4)
2622                         return false;
2623
2624                 std::string servername = params[0];
2625                 std::string password = params[1];
2626                 // hopcount is not used for a remote server, we calculate this ourselves
2627                 std::string description = params[3];
2628                 TreeServer* ParentOfThis = FindServer(prefix);
2629
2630                 if (!ParentOfThis)
2631                 {
2632                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2633                         return false;
2634                 }
2635                 TreeServer* CheckDupe = FindServer(servername);
2636                 if (CheckDupe)
2637                 {
2638                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2639                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2640                         return false;
2641                 }
2642                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2643                 ParentOfThis->AddChild(Node);
2644                 params[3] = ":" + params[3];
2645                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2646                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2647                 return true;
2648         }
2649
2650         bool Outbound_Reply_Server(std::deque<std::string> &params)
2651         {
2652                 if (params.size() < 4)
2653                         return false;
2654
2655                 irc::string servername = params[0].c_str();
2656                 std::string sname = params[0];
2657                 std::string password = params[1];
2658                 int hops = atoi(params[2].c_str());
2659
2660                 if (hops)
2661                 {
2662                         this->WriteLine("ERROR :Server too far away for authentication");
2663                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2664                         return false;
2665                 }
2666                 std::string description = params[3];
2667                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2668                 {
2669                         if ((x->Name == servername) && (x->RecvPass == password))
2670                         {
2671                                 TreeServer* CheckDupe = FindServer(sname);
2672                                 if (CheckDupe)
2673                                 {
2674                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2675                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2676                                         return false;
2677                                 }
2678                                 // Begin the sync here. this kickstarts the
2679                                 // other side, waiting in WAIT_AUTH_2 state,
2680                                 // into starting their burst, as it shows
2681                                 // that we're happy.
2682                                 this->LinkState = CONNECTED;
2683                                 // we should add the details of this server now
2684                                 // to the servers tree, as a child of the root
2685                                 // node.
2686                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2687                                 TreeRoot->AddChild(Node);
2688                                 params[3] = ":" + params[3];
2689                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2690                                 this->bursting = true;
2691                                 this->DoBurst(Node);
2692                                 return true;
2693                         }
2694                 }
2695                 this->WriteLine("ERROR :Invalid credentials");
2696                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2697                 return false;
2698         }
2699
2700         bool Inbound_Server(std::deque<std::string> &params)
2701         {
2702                 if (params.size() < 4)
2703                         return false;
2704
2705                 irc::string servername = params[0].c_str();
2706                 std::string sname = params[0];
2707                 std::string password = params[1];
2708                 int hops = atoi(params[2].c_str());
2709
2710                 if (hops)
2711                 {
2712                         this->WriteLine("ERROR :Server too far away for authentication");
2713                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2714                         return false;
2715                 }
2716                 std::string description = params[3];
2717                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2718                 {
2719                         if ((x->Name == servername) && (x->RecvPass == password))
2720                         {
2721                                 TreeServer* CheckDupe = FindServer(sname);
2722                                 if (CheckDupe)
2723                                 {
2724                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2725                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2726                                         return false;
2727                                 }
2728                                 /* If the config says this link is encrypted, but the remote side
2729                                  * hasnt bothered to send the AES command before SERVER, then we
2730                                  * boot them off as we MUST have this connection encrypted.
2731                                  */
2732                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2733                                 {
2734                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2735                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2736                                         return false;
2737                                 }
2738                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2739                                 this->InboundServerName = sname;
2740                                 this->InboundDescription = description;
2741                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2742                                 // along with the sendpass from this block.
2743                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2744                                 // move to the next state, we are now waiting for THEM.
2745                                 this->LinkState = WAIT_AUTH_2;
2746                                 return true;
2747                         }
2748                 }
2749                 this->WriteLine("ERROR :Invalid credentials");
2750                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2751                 return false;
2752         }
2753
2754         void Split(std::string line, std::deque<std::string> &n)
2755         {
2756                 n.clear();
2757                 irc::tokenstream tokens(line);
2758                 std::string param;
2759                 while ((param = tokens.GetToken()) != "")
2760                         n.push_back(param);
2761                 return;
2762         }
2763
2764         bool ProcessLine(std::string line)
2765         {
2766                 std::deque<std::string> params;
2767                 irc::string command;
2768                 std::string prefix;
2769
2770                 if (line.empty())
2771                         return true;
2772
2773                 line = line.substr(0, line.find_first_of("\r\n"));
2774
2775                 ServerInstance->Log(DEBUG,"IN: %s", line.c_str());
2776
2777                 this->Split(line.c_str(),params);
2778
2779                 if ((params[0][0] == ':') && (params.size() > 1))
2780                 {
2781                         prefix = params[0].substr(1);
2782                         params.pop_front();
2783                 }
2784
2785                 command = params[0].c_str();
2786                 params.pop_front();
2787
2788                 if ((!this->ctx_in) && (command == "AES"))
2789                 {
2790                         std::string sserv = params[0];
2791                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2792                         {
2793                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2794                                 {
2795                                         this->InitAES(x->EncryptionKey,sserv);
2796                                 }
2797                         }
2798
2799                         return true;
2800                 }
2801                 else if ((this->ctx_in) && (command == "AES"))
2802                 {
2803                         this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2804                 }
2805
2806                 switch (this->LinkState)
2807                 {
2808                         TreeServer* Node;
2809
2810                         case WAIT_AUTH_1:
2811                                 // Waiting for SERVER command from remote server. Server initiating
2812                                 // the connection sends the first SERVER command, listening server
2813                                 // replies with theirs if its happy, then if the initiator is happy,
2814                                 // it starts to send its net sync, which starts the merge, otherwise
2815                                 // it sends an ERROR.
2816                                 if (command == "PASS")
2817                                 {
2818                                         /* Silently ignored */
2819                                 }
2820                                 else if (command == "SERVER")
2821                                 {
2822                                         return this->Inbound_Server(params);
2823                                 }
2824                                 else if (command == "ERROR")
2825                                 {
2826                                         return this->Error(params);
2827                                 }
2828                                 else if (command == "USER")
2829                                 {
2830                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2831                                         return false;
2832                                 }
2833                                 else if (command == "CAPAB")
2834                                 {
2835                                         return this->Capab(params);
2836                                 }
2837                                 else if ((command == "U") || (command == "S"))
2838                                 {
2839                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2840                                         return false;
2841                                 }
2842                                 else
2843                                 {
2844                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2845                                         return false;
2846                                 }
2847                         break;
2848                         case WAIT_AUTH_2:
2849                                 // Waiting for start of other side's netmerge to say they liked our
2850                                 // password.
2851                                 if (command == "SERVER")
2852                                 {
2853                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2854                                         // silently ignore.
2855                                         return true;
2856                                 }
2857                                 else if ((command == "U") || (command == "S"))
2858                                 {
2859                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2860                                         return false;
2861                                 }
2862                                 else if (command == "BURST")
2863                                 {
2864                                         if (params.size())
2865                                         {
2866                                                 /* If a time stamp is provided, try and check syncronization */
2867                                                 time_t THEM = atoi(params[0].c_str());
2868                                                 long delta = THEM-time(NULL);
2869                                                 if ((delta < -600) || (delta > 600))
2870                                                 {
2871                                                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
2872                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2873                                                         return false;
2874                                                 }
2875                                                 else if ((delta < -60) || (delta > 60))
2876                                                 {
2877                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2878                                                 }
2879                                         }
2880                                         this->LinkState = CONNECTED;
2881                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2882                                         TreeRoot->AddChild(Node);
2883                                         params.clear();
2884                                         params.push_back(InboundServerName);
2885                                         params.push_back("*");
2886                                         params.push_back("1");
2887                                         params.push_back(":"+InboundDescription);
2888                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2889                                         this->bursting = true;
2890                                         this->DoBurst(Node);
2891                                 }
2892                                 else if (command == "ERROR")
2893                                 {
2894                                         return this->Error(params);
2895                                 }
2896                                 else if (command == "CAPAB")
2897                                 {
2898                                         return this->Capab(params);
2899                                 }
2900
2901                         break;
2902                         case LISTENER:
2903                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2904                                 return false;
2905                         break;
2906                         case CONNECTING:
2907                                 if (command == "SERVER")
2908                                 {
2909                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2910                                         // has just sent us their credentials. If we get this far, theyre
2911                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2912                                         // if we're happy with this, we should send our netburst which
2913                                         // kickstarts the merge.
2914                                         return this->Outbound_Reply_Server(params);
2915                                 }
2916                                 else if (command == "ERROR")
2917                                 {
2918                                         return this->Error(params);
2919                                 }
2920                         break;
2921                         case CONNECTED:
2922                                 // This is the 'authenticated' state, when all passwords
2923                                 // have been exchanged and anything past this point is taken
2924                                 // as gospel.
2925
2926                                 if (prefix != "")
2927                                 {
2928                                         std::string direction = prefix;
2929                                         userrec* t = this->Instance->FindNick(prefix);
2930                                         if (t)
2931                                         {
2932                                                 direction = t->server;
2933                                         }
2934                                         TreeServer* route_back_again = BestRouteTo(direction);
2935                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2936                                         {
2937                                                 if (route_back_again)
2938                                                         ServerInstance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2939                                                 return true;
2940                                         }
2941
2942                                         /* Fix by brain:
2943                                          * When there is activity on the socket, reset the ping counter so
2944                                          * that we're not wasting bandwidth pinging an active server.
2945                                          */
2946                                         route_back_again->SetNextPingTime(time(NULL) + 60);
2947                                         route_back_again->SetPingFlag();
2948                                 }
2949
2950                                 if (command == "SVSMODE")
2951                                 {
2952                                         /* Services expects us to implement
2953                                          * SVSMODE. In inspircd its the same as
2954                                          * MODE anyway.
2955                                          */
2956                                         command = "MODE";
2957                                 }
2958                                 std::string target = "";
2959                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2960                                  * working with std::string here.
2961                                  */
2962                                 if ((command == "NICK") && (params.size() > 1))
2963                                 {
2964                                         return this->IntroduceClient(prefix,params);
2965                                 }
2966                                 else if (command == "FJOIN")
2967                                 {
2968                                         return this->ForceJoin(prefix,params);
2969                                 }
2970                                 else if (command == "STATS")
2971                                 {
2972                                         return this->Stats(prefix, params);
2973                                 }
2974                                 else if (command == "MOTD")
2975                                 {
2976                                         return this->Motd(prefix, params);
2977                                 }
2978                                 else if (command == "ADMIN")
2979                                 {
2980                                         return this->Admin(prefix, params);
2981                                 }
2982                                 else if (command == "SERVER")
2983                                 {
2984                                         return this->RemoteServer(prefix,params);
2985                                 }
2986                                 else if (command == "ERROR")
2987                                 {
2988                                         return this->Error(params);
2989                                 }
2990                                 else if (command == "OPERTYPE")
2991                                 {
2992                                         return this->OperType(prefix,params);
2993                                 }
2994                                 else if (command == "FMODE")
2995                                 {
2996                                         return this->ForceMode(prefix,params);
2997                                 }
2998                                 else if (command == "KILL")
2999                                 {
3000                                         return this->RemoteKill(prefix,params);
3001                                 }
3002                                 else if (command == "FTOPIC")
3003                                 {
3004                                         return this->ForceTopic(prefix,params);
3005                                 }
3006                                 else if (command == "REHASH")
3007                                 {
3008                                         return this->RemoteRehash(prefix,params);
3009                                 }
3010                                 else if (command == "METADATA")
3011                                 {
3012                                         return this->MetaData(prefix,params);
3013                                 }
3014                                 else if (command == "PING")
3015                                 {
3016                                         /*
3017                                          * We just got a ping from a server that's bursting.
3018                                          * This can't be right, so set them to not bursting, and
3019                                          * apply their lines.
3020                                          */
3021                                         if (this->bursting)
3022                                         {
3023                                                 this->bursting = false;
3024                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3025                                         }
3026                                         if (prefix == "")
3027                                         {
3028                                                 prefix = this->GetName();
3029                                         }
3030                                         return this->LocalPing(prefix,params);
3031                                 }
3032                                 else if (command == "PONG")
3033                                 {
3034                                         /*
3035                                          * We just got a pong from a server that's bursting.
3036                                          * This can't be right, so set them to not bursting, and
3037                                          * apply their lines.
3038                                          */
3039                                         if (this->bursting)
3040                                         {
3041                                                 this->bursting = false;
3042                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3043                                         }
3044                                         if (prefix == "")
3045                                         {
3046                                                 prefix = this->GetName();
3047                                         }
3048                                         return this->LocalPong(prefix,params);
3049                                 }
3050                                 else if (command == "VERSION")
3051                                 {
3052                                         return this->ServerVersion(prefix,params);
3053                                 }
3054                                 else if (command == "FHOST")
3055                                 {
3056                                         return this->ChangeHost(prefix,params);
3057                                 }
3058                                 else if (command == "FNAME")
3059                                 {
3060                                         return this->ChangeName(prefix,params);
3061                                 }
3062                                 else if (command == "ADDLINE")
3063                                 {
3064                                         return this->AddLine(prefix,params);
3065                                 }
3066                                 else if (command == "SVSNICK")
3067                                 {
3068                                         if (prefix == "")
3069                                         {
3070                                                 prefix = this->GetName();
3071                                         }
3072                                         return this->ForceNick(prefix,params);
3073                                 }
3074                                 else if (command == "IDLE")
3075                                 {
3076                                         return this->Whois(prefix,params);
3077                                 }
3078                                 else if (command == "PUSH")
3079                                 {
3080                                         return this->Push(prefix,params);
3081                                 }
3082                                 else if (command == "TIME")
3083                                 {
3084                                         return this->Time(prefix,params);
3085                                 }
3086                                 else if ((command == "KICK") && (IsServer(prefix)))
3087                                 {
3088                                         std::string sourceserv = this->myhost;
3089                                         if (params.size() == 3)
3090                                         {
3091                                                 userrec* user = this->Instance->FindNick(params[1]);
3092                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3093                                                 if (user && chan)
3094                                                 {
3095                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3096                                                                 /* Yikes, the channels gone! */
3097                                                                 delete chan;
3098                                                 }
3099                                         }
3100                                         if (this->InboundServerName != "")
3101                                         {
3102                                                 sourceserv = this->InboundServerName;
3103                                         }
3104                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3105                                 }
3106                                 else if (command == "SVSJOIN")
3107                                 {
3108                                         if (prefix == "")
3109                                         {
3110                                                 prefix = this->GetName();
3111                                         }
3112                                         return this->ServiceJoin(prefix,params);
3113                                 }
3114                                 else if (command == "SQUIT")
3115                                 {
3116                                         if (params.size() == 2)
3117                                         {
3118                                                 this->Squit(FindServer(params[0]),params[1]);
3119                                         }
3120                                         return true;
3121                                 }
3122                                 else if (command == "ENDBURST")
3123                                 {
3124                                         this->bursting = false;
3125                                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3126                                         std::string sourceserv = this->myhost;
3127                                         if (this->InboundServerName != "")
3128                                         {
3129                                                 sourceserv = this->InboundServerName;
3130                                         }
3131                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3132                                         return true;
3133                                 }
3134                                 else
3135                                 {
3136                                         // not a special inter-server command.
3137                                         // Emulate the actual user doing the command,
3138                                         // this saves us having a huge ugly parser.
3139                                         userrec* who = this->Instance->FindNick(prefix);
3140                                         std::string sourceserv = this->myhost;
3141                                         if (this->InboundServerName != "")
3142                                         {
3143                                                 sourceserv = this->InboundServerName;
3144                                         }
3145                                         if (who)
3146                                         {
3147                                                 if ((command == "NICK") && (params.size() > 0))
3148                                                 {
3149                                                         /* On nick messages, check that the nick doesnt
3150                                                          * already exist here. If it does, kill their copy,
3151                                                          * and our copy.
3152                                                          */
3153                                                         userrec* x = this->Instance->FindNick(params[0]);
3154                                                         if ((x) && (x != who))
3155                                                         {
3156                                                                 std::deque<std::string> p;
3157                                                                 p.push_back(params[0]);
3158                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3159                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3160                                                                 p.clear();
3161                                                                 p.push_back(prefix);
3162                                                                 p.push_back("Nickname collision");
3163                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3164                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3165                                                                 userrec* y = this->Instance->FindNick(prefix);
3166                                                                 if (y)
3167                                                                 {
3168                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3169                                                                 }
3170                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3171                                                         }
3172                                                 }
3173                                                 // its a user
3174                                                 target = who->server;
3175                                                 const char* strparams[127];
3176                                                 for (unsigned int q = 0; q < params.size(); q++)
3177                                                 {
3178                                                         strparams[q] = params[q].c_str();
3179                                                 }
3180                                                 if (!this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3181                                                 {
3182                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3183                                                         return false;
3184                                                 }
3185                                         }
3186                                         else
3187                                         {
3188                                                 // its not a user. Its either a server, or somethings screwed up.
3189                                                 if (IsServer(prefix))
3190                                                 {
3191                                                         target = this->Instance->Config->ServerName;
3192                                                 }
3193                                                 else
3194                                                 {
3195                                                         ServerInstance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3196                                                         return true;
3197                                                 }
3198                                         }
3199                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3200
3201                                 }
3202                                 return true;
3203                         break;
3204                 }
3205                 return true;
3206         }
3207
3208         virtual std::string GetName()
3209         {
3210                 std::string sourceserv = this->myhost;
3211                 if (this->InboundServerName != "")
3212                 {
3213                         sourceserv = this->InboundServerName;
3214                 }
3215                 return sourceserv;
3216         }
3217
3218         virtual void OnTimeout()
3219         {
3220                 if (this->LinkState == CONNECTING)
3221                 {
3222                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3223                 }
3224         }
3225
3226         virtual void OnClose()
3227         {
3228                 // Connection closed.
3229                 // If the connection is fully up (state CONNECTED)
3230                 // then propogate a netsplit to all peers.
3231                 std::string quitserver = this->myhost;
3232                 if (this->InboundServerName != "")
3233                 {
3234                         quitserver = this->InboundServerName;
3235                 }
3236                 TreeServer* s = FindServer(quitserver);
3237                 if (s)
3238                 {
3239                         Squit(s,"Remote host closed the connection");
3240                 }
3241                 this->Instance->WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
3242         }
3243
3244         virtual int OnIncomingConnection(int newsock, char* ip)
3245         {
3246                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3247                  * or discovering if this port is the server port, we don't allow connections from any
3248                  * IPs for which we don't have a link block.
3249                  */
3250                 bool found = false;
3251
3252                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3253                 if (!found)
3254                 {
3255                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3256                                 if (MatchCIDR(ip, (*i).c_str()))
3257                                         found = true;
3258
3259                         if (!found)
3260                         {
3261                                 this->Instance->WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
3262                                 close(newsock);
3263                                 return false;
3264                         }
3265                 }
3266                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3267                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3268                 return true;
3269         }
3270 };
3271
3272 /** This class is used to resolve server hostnames during /connect and autoconnect.
3273  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3274  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3275  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3276  * will have an IP address which we can then use to continue our connection.
3277  */
3278 class ServernameResolver : public Resolver
3279 {
3280  private:
3281         /** A copy of the Link tag info for what we're connecting to.
3282          * We take a copy, rather than using a pointer, just in case the
3283          * admin takes the tag away and rehashes while the domain is resolving.
3284          */
3285         Link MyLink;
3286  public:
3287         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3288         {
3289                 /* Nothing in here, folks */
3290         }
3291
3292         void OnLookupComplete(const std::string &result)
3293         {
3294                 /* Initiate the connection, now that we have an IP to use.
3295                  * Passing a hostname directly to InspSocket causes it to
3296                  * just bail and set its FD to -1.
3297                  */
3298                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3299                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3300                 {
3301                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3302                         if (newsocket->GetFd() > -1)
3303                         {
3304                                 /* We're all OK */
3305                         }
3306                         else
3307                         {
3308                                 /* Something barfed, show the opers */
3309                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3310                                 delete newsocket;
3311                         }
3312                 }
3313         }
3314
3315         void OnError(ResolverError e, const std::string &errormessage)
3316         {
3317                 /* Ooops! */
3318                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3319         }
3320 };
3321
3322 class SecurityIPResolver : public Resolver
3323 {
3324  private:
3325         Link MyLink;
3326  public:
3327         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3328         {
3329         }
3330
3331         void OnLookupComplete(const std::string &result)
3332         {
3333                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3334                 ValidIPs.push_back(result);
3335         }
3336
3337         void OnError(ResolverError e, const std::string &errormessage)
3338         {
3339                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3340         }
3341 };
3342
3343 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3344 {
3345         for (unsigned int c = 0; c < list.size(); c++)
3346         {
3347                 if (list[c] == server)
3348                 {
3349                         return;
3350                 }
3351         }
3352         list.push_back(server);
3353 }
3354
3355 // returns a list of DIRECT servernames for a specific channel
3356 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3357 {
3358         CUList *ulist = c->GetUsers();
3359         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3360         {
3361                 if (i->second->GetFd() < 0)
3362                 {
3363                         TreeServer* best = BestRouteTo(i->second->server);
3364                         if (best)
3365                                 AddThisServer(best,list);
3366                 }
3367         }
3368         return;
3369 }
3370
3371 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3372 {
3373         TreeServer* omitroute = BestRouteTo(omit);
3374         if ((command == "NOTICE") || (command == "PRIVMSG"))
3375         {
3376                 if (params.size() >= 2)
3377                 {
3378                         /* Prefixes */
3379                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3380                         {
3381                                 params[0] = params[0].substr(1, params[0].length()-1);
3382                         }
3383                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3384                         {
3385                                 // special routing for private messages/notices
3386                                 userrec* d = ServerInstance->FindNick(params[0]);
3387                                 if (d)
3388                                 {
3389                                         std::deque<std::string> par;
3390                                         par.push_back(params[0]);
3391                                         par.push_back(":"+params[1]);
3392                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3393                                         return true;
3394                                 }
3395                         }
3396                         else if (*(params[0].c_str()) == '$')
3397                         {
3398                                 std::deque<std::string> par;
3399                                 par.push_back(params[0]);
3400                                 par.push_back(":"+params[1]);
3401                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3402                                 return true;
3403                         }
3404                         else
3405                         {
3406                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3407                                 chanrec* c = ServerInstance->FindChan(params[0]);
3408                                 if (c)
3409                                 {
3410                                         std::deque<TreeServer*> list;
3411                                         GetListOfServersForChannel(c,list);
3412                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3413                                         unsigned int lsize = list.size();
3414                                         for (unsigned int i = 0; i < lsize; i++)
3415                                         {
3416                                                 TreeSocket* Sock = list[i]->GetSocket();
3417                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3418                                                 {
3419                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3420                                                         Sock->WriteLine(data);
3421                                                 }
3422                                         }
3423                                         return true;
3424                                 }
3425                         }
3426                 }
3427         }
3428         unsigned int items = TreeRoot->ChildCount();
3429         for (unsigned int x = 0; x < items; x++)
3430         {
3431                 TreeServer* Route = TreeRoot->GetChild(x);
3432                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3433                 {
3434                         TreeSocket* Sock = Route->GetSocket();
3435                         if (Sock)
3436                                 Sock->WriteLine(data);
3437                 }
3438         }
3439         return true;
3440 }
3441
3442 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3443 {
3444         TreeServer* omitroute = BestRouteTo(omit);
3445         std::string FullLine = ":" + prefix + " " + command;
3446         unsigned int words = params.size();
3447         for (unsigned int x = 0; x < words; x++)
3448         {
3449                 FullLine = FullLine + " " + params[x];
3450         }
3451         unsigned int items = TreeRoot->ChildCount();
3452         for (unsigned int x = 0; x < items; x++)
3453         {
3454                 TreeServer* Route = TreeRoot->GetChild(x);
3455                 // Send the line IF:
3456                 // The route has a socket (its a direct connection)
3457                 // The route isnt the one to be omitted
3458                 // The route isnt the path to the one to be omitted
3459                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3460                 {
3461                         TreeSocket* Sock = Route->GetSocket();
3462                         if (Sock)
3463                                 Sock->WriteLine(FullLine);
3464                 }
3465         }
3466         return true;
3467 }
3468
3469 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3470 {
3471         std::string FullLine = ":" + prefix + " " + command;
3472         unsigned int words = params.size();
3473         for (unsigned int x = 0; x < words; x++)
3474         {
3475                 FullLine = FullLine + " " + params[x];
3476         }
3477         unsigned int items = TreeRoot->ChildCount();
3478         for (unsigned int x = 0; x < items; x++)
3479         {
3480                 TreeServer* Route = TreeRoot->GetChild(x);
3481                 if (Route && Route->GetSocket())
3482                 {
3483                         TreeSocket* Sock = Route->GetSocket();
3484                         if (Sock)
3485                                 Sock->WriteLine(FullLine);
3486                 }
3487         }
3488         return true;
3489 }
3490
3491 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3492 {
3493         std::string spfx = prefix;
3494         std::string scmd = command;
3495         return DoOneToMany(spfx, scmd, params);
3496 }
3497
3498 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3499 {
3500         std::string spfx = prefix;
3501         std::string scmd = command;
3502         return DoOneToAllButSender(spfx, scmd, params, omit);
3503 }
3504
3505 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3506 {
3507         TreeServer* Route = BestRouteTo(target);
3508         if (Route)
3509         {
3510                 std::string FullLine = ":" + prefix + " " + command;
3511                 unsigned int words = params.size();
3512                 for (unsigned int x = 0; x < words; x++)
3513                 {
3514                         FullLine = FullLine + " " + params[x];
3515                 }
3516                 if (Route && Route->GetSocket())
3517                 {
3518                         TreeSocket* Sock = Route->GetSocket();
3519                         if (Sock)
3520                                 Sock->WriteLine(FullLine);
3521                 }
3522                 return true;
3523         }
3524         else
3525         {
3526                 return false;
3527         }
3528 }
3529
3530 std::vector<TreeSocket*> Bindings;
3531
3532 void ReadConfiguration(bool rebind)
3533 {
3534         Conf = new ConfigReader(ServerInstance);
3535         if (rebind)
3536         {
3537                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3538                 {
3539                         std::string Type = Conf->ReadValue("bind","type",j);
3540                         std::string IP = Conf->ReadValue("bind","address",j);
3541                         long Port = Conf->ReadInteger("bind","port",j,true);
3542                         if (Type == "servers")
3543                         {
3544                                 if (IP == "*")
3545                                 {
3546                                         IP = "";
3547                                 }
3548                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3549                                 if (listener->GetState() == I_LISTENING)
3550                                 {
3551                                         Bindings.push_back(listener);
3552                                 }
3553                                 else
3554                                 {
3555                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3556                                         listener->Close();
3557                                         DELETE(listener);
3558                                 }
3559                         }
3560                 }
3561         }
3562         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3563         HideULines = Conf->ReadFlag("options","hideulines",0);
3564         LinkBlocks.clear();
3565         ValidIPs.clear();
3566         for (int j =0; j < Conf->Enumerate("link"); j++)
3567         {
3568                 Link L;
3569                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3570                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3571                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3572                 L.Port = Conf->ReadInteger("link","port",j,true);
3573                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3574                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3575                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3576                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3577                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3578                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3579                 /* Bugfix by brain, do not allow people to enter bad configurations */
3580                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3581                 {
3582                         ValidIPs.push_back(L.IPAddr);
3583
3584                         if (Allow.length())
3585                                 ValidIPs.push_back(Allow);
3586
3587                         /* Needs resolving */
3588                         insp_inaddr binip;
3589                         if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3590                         {
3591                                 try
3592                                 {
3593                                         SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3594                                         ServerInstance->AddResolver(sr);
3595                                 }
3596                                 catch (ModuleException& e)
3597                                 {
3598                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3599                                 }
3600                         }
3601
3602                         LinkBlocks.push_back(L);
3603                         ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3604                 }
3605                 else
3606                 {
3607                         if (L.IPAddr == "")
3608                         {
3609                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3610                         }
3611                         else if (L.RecvPass == "")
3612                         {
3613                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3614                         }
3615                         else if (L.SendPass == "")
3616                         {
3617                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3618                         }
3619                         else if (L.Name == "")
3620                         {
3621                                 ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3622                         }
3623                         else if (!L.Port)
3624                         {
3625                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3626                         }
3627                 }
3628         }
3629         DELETE(Conf);
3630 }
3631
3632
3633 class ModuleSpanningTree : public Module
3634 {
3635         std::vector<TreeSocket*> Bindings;
3636         int line;
3637         int NumServers;
3638         unsigned int max_local;
3639         unsigned int max_global;
3640         cmd_rconnect* command_rconnect;
3641
3642  public:
3643
3644         ModuleSpanningTree(InspIRCd* Me)
3645                 : Module::Module(Me), max_local(0), max_global(0)
3646         {
3647
3648                 Bindings.clear();
3649
3650                 ::ServerInstance = Me;
3651
3652                 // Create the root of the tree
3653                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3654
3655                 ReadConfiguration(true);
3656
3657                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3658                 ServerInstance->AddCommand(command_rconnect);
3659         }
3660
3661         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3662         {
3663                 std::string Parent = TreeRoot->GetName();
3664                 if (Current->GetParent())
3665                 {
3666                         Parent = Current->GetParent()->GetName();
3667                 }
3668                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3669                 {
3670                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3671                         {
3672                                 if (*user->oper)
3673                                 {
3674                                          ShowLinks(Current->GetChild(q),user,hops+1);
3675                                 }
3676                         }
3677                         else
3678                         {
3679                                 ShowLinks(Current->GetChild(q),user,hops+1);
3680                         }
3681                 }
3682                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3683                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3684                         return;
3685                 user->WriteServ("364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(FlatLinks && (!*user->oper)) ? ServerInstance->Config->ServerName : Parent.c_str(),(FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
3686         }
3687
3688         int CountLocalServs()
3689         {
3690                 return TreeRoot->ChildCount();
3691         }
3692
3693         int CountServs()
3694         {
3695                 return serverlist.size();
3696         }
3697
3698         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3699         {
3700                 ShowLinks(TreeRoot,user,0);
3701                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3702                 return;
3703         }
3704
3705         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3706         {
3707                 unsigned int n_users = ServerInstance->UserCount();
3708
3709                 /* Only update these when someone wants to see them, more efficient */
3710                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3711                         max_local = ServerInstance->LocalUserCount();
3712                 if (n_users > max_global)
3713                         max_global = n_users;
3714
3715                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3716                 if (ServerInstance->OperCount())
3717                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3718                 if (ServerInstance->UnregisteredUserCount())
3719                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3720                 if (ServerInstance->ChannelCount())
3721                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3722                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3723                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3724                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3725                 return;
3726         }
3727
3728         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3729
3730         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3731         {
3732                 if (line < 128)
3733                 {
3734                         for (int t = 0; t < depth; t++)
3735                         {
3736                                 matrix[line][t] = ' ';
3737                         }
3738
3739                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3740                         // a 'Spacer' String to compensate.
3741                         char spacer[40];
3742
3743                         memset(spacer,' ',40);
3744                         if ((40 - Current->GetName().length() - depth) > 1) {
3745                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3746                         }
3747                         else
3748                         {
3749                                 spacer[5] = '\0';
3750                         }
3751
3752                         float percent;
3753                         char text[80];
3754                         if (ServerInstance->clientlist.size() == 0) {
3755                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3756                                 percent = 0;
3757                         }
3758                         else
3759                         {
3760                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3761                         }
3762                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3763                         totusers += Current->GetUserCount();
3764                         totservers++;
3765                         strlcpy(&matrix[line][depth],text,80);
3766                         line++;
3767                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3768                         {
3769                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3770                                 {
3771                                         if (*user->oper)
3772                                         {
3773                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3774                                         }
3775                                 }
3776                                 else
3777                                 {
3778                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3779                                 }
3780                         }
3781                 }
3782         }
3783
3784         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3785         {
3786                 if (pcnt > 0)
3787                 {
3788                         /* Remote MOTD, the server is within the 1st parameter */
3789                         std::deque<std::string> params;
3790                         params.push_back(parameters[0]);
3791
3792                         /* Send it out remotely, generate no reply yet */
3793                         TreeServer* s = FindServerMask(parameters[0]);
3794                         if (s)
3795                         {
3796                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3797                         }
3798                         else
3799                         {
3800                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3801                         }
3802                         return 1;
3803                 }
3804                 return 0;
3805         }
3806
3807         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
3808         {
3809                 if (pcnt > 0)
3810                 {
3811                         /* Remote ADMIN, the server is within the 1st parameter */
3812                         std::deque<std::string> params;
3813                         params.push_back(parameters[0]);
3814
3815                         /* Send it out remotely, generate no reply yet */
3816                         TreeServer* s = FindServerMask(parameters[0]);
3817                         if (s)
3818                         {
3819                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
3820                         }
3821                         else
3822                         {
3823                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3824                         }
3825                         return 1;
3826                 }
3827                 return 0;
3828         }
3829
3830         int HandleStats(const char** parameters, int pcnt, userrec* user)
3831         {
3832                 if (pcnt > 1)
3833                 {
3834                         /* Remote STATS, the server is within the 2nd parameter */
3835                         std::deque<std::string> params;
3836                         params.push_back(parameters[0]);
3837                         params.push_back(parameters[1]);
3838                         /* Send it out remotely, generate no reply yet */
3839                         TreeServer* s = FindServerMask(parameters[1]);
3840                         if (s)
3841                         {
3842                                 params[1] = s->GetName();
3843                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3844                         }
3845                         else
3846                         {
3847                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3848                         }
3849                         return 1;
3850                 }
3851                 return 0;
3852         }
3853
3854         // Ok, prepare to be confused.
3855         // After much mulling over how to approach this, it struck me that
3856         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3857         // keeping track of a ton of ascii characters, and line by line
3858         // under recursion working out where to place them using multiplications
3859         // and divisons, we instead render the map onto a backplane of characters
3860         // (a character matrix), then draw the branches as a series of "L" shapes
3861         // from the nodes. This is not only friendlier on CPU it uses less stack.
3862
3863         void HandleMap(const char** parameters, int pcnt, userrec* user)
3864         {
3865                 // This array represents a virtual screen which we will
3866                 // "scratch" draw to, as the console device of an irc
3867                 // client does not provide for a proper terminal.
3868                 float totusers = 0;
3869                 float totservers = 0;
3870                 char matrix[128][80];
3871                 for (unsigned int t = 0; t < 128; t++)
3872                 {
3873                         matrix[t][0] = '\0';
3874                 }
3875                 line = 0;
3876                 // The only recursive bit is called here.
3877                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3878                 // Process each line one by one. The algorithm has a limit of
3879                 // 128 servers (which is far more than a spanning tree should have
3880                 // anyway, so we're ok). This limit can be raised simply by making
3881                 // the character matrix deeper, 128 rows taking 10k of memory.
3882                 for (int l = 1; l < line; l++)
3883                 {
3884                         // scan across the line looking for the start of the
3885                         // servername (the recursive part of the algorithm has placed
3886                         // the servers at indented positions depending on what they
3887                         // are related to)
3888                         int first_nonspace = 0;
3889                         while (matrix[l][first_nonspace] == ' ')
3890                         {
3891                                 first_nonspace++;
3892                         }
3893                         first_nonspace--;
3894                         // Draw the `- (corner) section: this may be overwritten by
3895                         // another L shape passing along the same vertical pane, becoming
3896                         // a |- (branch) section instead.
3897                         matrix[l][first_nonspace] = '-';
3898                         matrix[l][first_nonspace-1] = '`';
3899                         int l2 = l - 1;
3900                         // Draw upwards until we hit the parent server, causing possibly
3901                         // other corners (`-) to become branches (|-)
3902                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3903                         {
3904                                 matrix[l2][first_nonspace-1] = '|';
3905                                 l2--;
3906                         }
3907                 }
3908                 // dump the whole lot to the user. This is the easy bit, honest.
3909                 for (int t = 0; t < line; t++)
3910                 {
3911                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
3912                 }
3913                 float avg_users = totusers / totservers;
3914                 user->WriteServ("270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
3915         user->WriteServ("007 %s :End of /MAP",user->nick);
3916                 return;
3917         }
3918
3919         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3920         {
3921                 TreeServer* s = FindServerMask(parameters[0]);
3922                 if (s)
3923                 {
3924                         if (s == TreeRoot)
3925                         {
3926                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3927                                 return 1;
3928                         }
3929                         TreeSocket* sock = s->GetSocket();
3930                         if (sock)
3931                         {
3932                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
3933                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3934                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3935                                 ServerInstance->SE->DelFd(sock);
3936                                 sock->Close();
3937                                 delete sock;
3938                         }
3939                         else
3940                         {
3941                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3942                         }
3943                 }
3944                 else
3945                 {
3946                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3947                 }
3948                 return 1;
3949         }
3950
3951         int HandleTime(const char** parameters, int pcnt, userrec* user)
3952         {
3953                 if ((IS_LOCAL(user)) && (pcnt))
3954                 {
3955                         TreeServer* found = FindServerMask(parameters[0]);
3956                         if (found)
3957                         {
3958                                 // we dont' override for local server
3959                                 if (found == TreeRoot)
3960                                         return 0;
3961
3962                                 std::deque<std::string> params;
3963                                 params.push_back(found->GetName());
3964                                 params.push_back(user->nick);
3965                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
3966                         }
3967                         else
3968                         {
3969                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
3970                         }
3971                 }
3972                 return 1;
3973         }
3974
3975         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
3976         {
3977                 if ((IS_LOCAL(user)) && (pcnt > 1))
3978                 {
3979                         userrec* remote = ServerInstance->FindNick(parameters[1]);
3980                         if ((remote) && (remote->GetFd() < 0))
3981                         {
3982                                 std::deque<std::string> params;
3983                                 params.push_back(parameters[1]);
3984                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3985                                 return 1;
3986                         }
3987                         else if (!remote)
3988                         {
3989                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
3990                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3991                                 return 1;
3992                         }
3993                 }
3994                 return 0;
3995         }
3996
3997         void DoPingChecks(time_t curtime)
3998         {
3999                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4000                 {
4001                         TreeServer* serv = TreeRoot->GetChild(j);
4002                         TreeSocket* sock = serv->GetSocket();
4003                         if (sock)
4004                         {
4005                                 if (curtime >= serv->NextPingTime())
4006                                 {
4007                                         if (serv->AnsweredLastPing())
4008                                         {
4009                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4010                                                 serv->SetNextPingTime(curtime + 60);
4011                                         }
4012                                         else
4013                                         {
4014                                                 // they didnt answer, boot them
4015                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4016                                                 sock->Squit(serv,"Ping timeout");
4017                                                 ServerInstance->SE->DelFd(sock);
4018                                                 sock->Close();
4019                                                 delete sock;
4020                                                 return;
4021                                         }
4022                                 }
4023                         }
4024                 }
4025         }
4026
4027         void AutoConnectServers(time_t curtime)
4028         {
4029                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4030                 {
4031                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4032                         {
4033                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4034                                 x->NextConnectTime = curtime + x->AutoConnect;
4035                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4036                                 if (!CheckDupe)
4037                                 {
4038                                         // an autoconnected server is not connected. Check if its time to connect it
4039                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4040
4041                                         insp_inaddr binip;
4042
4043                                         /* Do we already have an IP? If so, no need to resolve it. */
4044                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4045                                         {
4046                                                 TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4047                                                 if (newsocket->GetFd() > -1)
4048                                                 {
4049                                                 }
4050                                                 else
4051                                                 {
4052                                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4053                                                         delete newsocket;
4054                                                 }
4055                                         }
4056                                         else
4057                                         {
4058                                                 try
4059                                                 {
4060                                                         ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4061                                                         ServerInstance->AddResolver(snr);
4062                                                 }
4063                                                 catch (ModuleException& e)
4064                                                 {
4065                                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4066                                                 }
4067                                         }
4068
4069                                 }
4070                         }
4071                 }
4072         }
4073
4074         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4075         {
4076                 // we've already checked if pcnt > 0, so this is safe
4077                 TreeServer* found = FindServerMask(parameters[0]);
4078                 if (found)
4079                 {
4080                         std::string Version = found->GetVersion();
4081                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4082                         if (found == TreeRoot)
4083                         {
4084                                 std::stringstream out(ServerInstance->Config->data005);
4085                                 std::string token = "";
4086                                 std::string line5 = "";
4087                                 int token_counter = 0;
4088
4089                                 while (!out.eof())
4090                                 {
4091                                         out >> token;
4092                                         line5 = line5 + token + " ";
4093                                         token_counter++;
4094
4095                                         if ((token_counter >= 13) || (out.eof() == true))
4096                                         {
4097                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4098                                                 line5 = "";
4099                                                 token_counter = 0;
4100                                         }
4101                                 }
4102                         }
4103                 }
4104                 else
4105                 {
4106                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4107                 }
4108                 return 1;
4109         }
4110
4111         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4112         {
4113                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4114                 {
4115                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4116                         {
4117                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4118                                 if (!CheckDupe)
4119                                 {
4120                                         user->WriteServ("NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
4121                                         insp_inaddr binip;
4122
4123                                         /* Do we already have an IP? If so, no need to resolve it. */
4124                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4125                                         {
4126                                                 TreeSocket* newsocket = new TreeSocket(ServerInstance,x->IPAddr,x->Port,false,10,x->Name.c_str());
4127                                                 if (newsocket->GetFd() > -1)
4128                                                 {
4129                                                 }
4130                                                 else
4131                                                 {
4132                                                         ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4133                                                         delete newsocket;
4134                                                 }
4135                                         }
4136                                         else
4137                                         {
4138                                                 try
4139                                                 {
4140                                                         ServernameResolver* snr = new ServernameResolver(ServerInstance, x->IPAddr, *x);
4141                                                         ServerInstance->AddResolver(snr);
4142                                                 }
4143                                                 catch (ModuleException& e)
4144                                                 {
4145                                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4146                                                 }
4147                                         }
4148                                         return 1;
4149                                 }
4150                                 else
4151                                 {
4152                                         user->WriteServ("NOTICE %s :*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002",user->nick,x->Name.c_str(),CheckDupe->GetParent()->GetName().c_str());
4153                                         return 1;
4154                                 }
4155                         }
4156                 }
4157                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4158                 return 1;
4159         }
4160
4161         virtual int OnStats(char statschar, userrec* user, string_list &results)
4162         {
4163                 if (statschar == 'c')
4164                 {
4165                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4166                         {
4167                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 213 "+user->nick+" C *@"+(LinkBlocks[i].HiddenFromStats ? "<hidden>" : LinkBlocks[i].IPAddr)+" * "+LinkBlocks[i].Name.c_str()+" "+ConvToStr(LinkBlocks[i].Port)+" "+(LinkBlocks[i].EncryptionKey != "" ? 'e' : '-')+(LinkBlocks[i].AutoConnect ? 'a' : '-')+'s');
4168                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4169                         }
4170                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4171                         ServerInstance->SNO->WriteToSnoMask('t',"Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,ServerInstance->Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
4172                         return 1;
4173                 }
4174                 return 0;
4175         }
4176
4177         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
4178         {
4179                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4180                 if (!validated)
4181                         return 0;
4182
4183                 if (command == "CONNECT")
4184                 {
4185                         return this->HandleConnect(parameters,pcnt,user);
4186                 }
4187                 else if (command == "STATS")
4188                 {
4189                         return this->HandleStats(parameters,pcnt,user);
4190                 }
4191                 else if (command == "MOTD")
4192                 {
4193                         return this->HandleMotd(parameters,pcnt,user);
4194                 }
4195                 else if (command == "ADMIN")
4196                 {
4197                         return this->HandleAdmin(parameters,pcnt,user);
4198                 }
4199                 else if (command == "SQUIT")
4200                 {
4201                         return this->HandleSquit(parameters,pcnt,user);
4202                 }
4203                 else if (command == "MAP")
4204                 {
4205                         this->HandleMap(parameters,pcnt,user);
4206                         return 1;
4207                 }
4208                 else if ((command == "TIME") && (pcnt > 0))
4209                 {
4210                         return this->HandleTime(parameters,pcnt,user);
4211                 }
4212                 else if (command == "LUSERS")
4213                 {
4214                         this->HandleLusers(parameters,pcnt,user);
4215                         return 1;
4216                 }
4217                 else if (command == "LINKS")
4218                 {
4219                         this->HandleLinks(parameters,pcnt,user);
4220                         return 1;
4221                 }
4222                 else if (command == "WHOIS")
4223                 {
4224                         if (pcnt > 1)
4225                         {
4226                                 // remote whois
4227                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4228                         }
4229                 }
4230                 else if ((command == "VERSION") && (pcnt > 0))
4231                 {
4232                         this->HandleVersion(parameters,pcnt,user);
4233                         return 1;
4234                 }
4235                 else if (ServerInstance->IsValidModuleCommand(command, pcnt, user))
4236                 {
4237                         // this bit of code cleverly routes all module commands
4238                         // to all remote severs *automatically* so that modules
4239                         // can just handle commands locally, without having
4240                         // to have any special provision in place for remote
4241                         // commands and linking protocols.
4242                         std::deque<std::string> params;
4243                         params.clear();
4244                         for (int j = 0; j < pcnt; j++)
4245                         {
4246                                 if (strchr(parameters[j],' '))
4247                                 {
4248                                         params.push_back(":" + std::string(parameters[j]));
4249                                 }
4250                                 else
4251                                 {
4252                                         params.push_back(std::string(parameters[j]));
4253                                 }
4254                         }
4255                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4256                         DoOneToMany(user->nick,command,params);
4257                 }
4258                 return 0;
4259         }
4260
4261         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4262         {
4263                 TreeServer* s = FindServer(servername);
4264                 if (s)
4265                 {
4266                         description = s->GetDesc();
4267                 }
4268         }
4269
4270         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4271         {
4272                 if (IS_LOCAL(source))
4273                 {
4274                         std::deque<std::string> params;
4275                         params.push_back(dest->nick);
4276                         params.push_back(channel->name);
4277                         DoOneToMany(source->nick,"INVITE",params);
4278                 }
4279         }
4280
4281         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4282         {
4283                 std::deque<std::string> params;
4284                 params.push_back(chan->name);
4285                 params.push_back(":"+topic);
4286                 DoOneToMany(user->nick,"TOPIC",params);
4287         }
4288
4289         virtual void OnWallops(userrec* user, const std::string &text)
4290         {
4291                 if (IS_LOCAL(user))
4292                 {
4293                         std::deque<std::string> params;
4294                         params.push_back(":"+text);
4295                         DoOneToMany(user->nick,"WALLOPS",params);
4296                 }
4297         }
4298
4299         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4300         {
4301                 if (target_type == TYPE_USER)
4302                 {
4303                         userrec* d = (userrec*)dest;
4304                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4305                         {
4306                                 std::deque<std::string> params;
4307                                 params.clear();
4308                                 params.push_back(d->nick);
4309                                 params.push_back(":"+text);
4310                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4311                         }
4312                 }
4313                 else if (target_type == TYPE_CHANNEL)
4314                 {
4315                         if (IS_LOCAL(user))
4316                         {
4317                                 chanrec *c = (chanrec*)dest;
4318                                 if (c)
4319                                 {
4320                                         std::string cname = c->name;
4321                                         if (status)
4322                                                 cname = status + cname;
4323                                         std::deque<TreeServer*> list;
4324                                         GetListOfServersForChannel(c,list);
4325                                         unsigned int ucount = list.size();
4326                                         for (unsigned int i = 0; i < ucount; i++)
4327                                         {
4328                                                 TreeSocket* Sock = list[i]->GetSocket();
4329                                                 if (Sock)
4330                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4331                                         }
4332                                 }
4333                         }
4334                 }
4335                 else if (target_type == TYPE_SERVER)
4336                 {
4337                         if (IS_LOCAL(user))
4338                         {
4339                                 char* target = (char*)dest;
4340                                 std::deque<std::string> par;
4341                                 par.push_back(target);
4342                                 par.push_back(":"+text);
4343                                 DoOneToMany(user->nick,"NOTICE",par);
4344                         }
4345                 }
4346         }
4347
4348         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4349         {
4350                 if (target_type == TYPE_USER)
4351                 {
4352                         // route private messages which are targetted at clients only to the server
4353                         // which needs to receive them
4354                         userrec* d = (userrec*)dest;
4355                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4356                         {
4357                                 std::deque<std::string> params;
4358                                 params.clear();
4359                                 params.push_back(d->nick);
4360                                 params.push_back(":"+text);
4361                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4362                         }
4363                 }
4364                 else if (target_type == TYPE_CHANNEL)
4365                 {
4366                         if (IS_LOCAL(user))
4367                         {
4368                                 chanrec *c = (chanrec*)dest;
4369                                 if (c)
4370                                 {
4371                                         std::string cname = c->name;
4372                                         if (status)
4373                                                 cname = status + cname;
4374                                         std::deque<TreeServer*> list;
4375                                         GetListOfServersForChannel(c,list);
4376                                         unsigned int ucount = list.size();
4377                                         for (unsigned int i = 0; i < ucount; i++)
4378                                         {
4379                                                 TreeSocket* Sock = list[i]->GetSocket();
4380                                                 if (Sock)
4381                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4382                                         }
4383                                 }
4384                         }
4385                 }
4386                 else if (target_type == TYPE_SERVER)
4387                 {
4388                         if (IS_LOCAL(user))
4389                         {
4390                                 char* target = (char*)dest;
4391                                 std::deque<std::string> par;
4392                                 par.push_back(target);
4393                                 par.push_back(":"+text);
4394                                 DoOneToMany(user->nick,"PRIVMSG",par);
4395                         }
4396                 }
4397         }
4398
4399         virtual void OnBackgroundTimer(time_t curtime)
4400         {
4401                 AutoConnectServers(curtime);
4402                 DoPingChecks(curtime);
4403         }
4404
4405         virtual void OnUserJoin(userrec* user, chanrec* channel)
4406         {
4407                 // Only do this for local users
4408                 if (IS_LOCAL(user))
4409                 {
4410                         std::deque<std::string> params;
4411                         params.clear();
4412                         params.push_back(channel->name);
4413
4414                         if (channel->GetUserCounter() > 1)
4415                         {
4416                                 // not the first in the channel
4417                                 DoOneToMany(user->nick,"JOIN",params);
4418                         }
4419                         else
4420                         {
4421                                 // first in the channel, set up their permissions
4422                                 // and the channel TS with FJOIN.
4423                                 char ts[24];
4424                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
4425                                 params.clear();
4426                                 params.push_back(channel->name);
4427                                 params.push_back(ts);
4428                                 params.push_back("@,"+std::string(user->nick));
4429                                 DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4430                         }
4431                 }
4432         }
4433
4434         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4435         {
4436                 // only occurs for local clients
4437                 if (user->registered != REG_ALL)
4438                         return;
4439                 std::deque<std::string> params;
4440                 params.push_back(newhost);
4441                 DoOneToMany(user->nick,"FHOST",params);
4442         }
4443
4444         virtual void OnChangeName(userrec* user, const std::string &gecos)
4445         {
4446                 // only occurs for local clients
4447                 if (user->registered != REG_ALL)
4448                         return;
4449                 std::deque<std::string> params;
4450                 params.push_back(gecos);
4451                 DoOneToMany(user->nick,"FNAME",params);
4452         }
4453
4454         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4455         {
4456                 if (IS_LOCAL(user))
4457                 {
4458                         std::deque<std::string> params;
4459                         params.push_back(channel->name);
4460                         if (partmessage != "")
4461                                 params.push_back(":"+partmessage);
4462                         DoOneToMany(user->nick,"PART",params);
4463                 }
4464         }
4465
4466         virtual void OnUserConnect(userrec* user)
4467         {
4468                 char agestr[MAXBUF];
4469                 if (IS_LOCAL(user))
4470                 {
4471                         std::deque<std::string> params;
4472                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4473                         params.push_back(agestr);
4474                         params.push_back(user->nick);
4475                         params.push_back(user->host);
4476                         params.push_back(user->dhost);
4477                         params.push_back(user->ident);
4478                         params.push_back("+"+std::string(user->FormatModes()));
4479                         params.push_back(user->GetIPString());
4480                         params.push_back(":"+std::string(user->fullname));
4481                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4482
4483                         // User is Local, change needs to be reflected!
4484                         TreeServer* SourceServer = FindServer(user->server);
4485                         if (SourceServer)
4486                         {
4487                                 SourceServer->AddUserCount();
4488                         }
4489
4490                 }
4491         }
4492
4493         virtual void OnUserQuit(userrec* user, const std::string &reason)
4494         {
4495                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4496                 {
4497                         std::deque<std::string> params;
4498                         params.push_back(":"+reason);
4499                         DoOneToMany(user->nick,"QUIT",params);
4500                 }
4501                 // Regardless, We need to modify the user Counts..
4502                 TreeServer* SourceServer = FindServer(user->server);
4503                 if (SourceServer)
4504                 {
4505                         SourceServer->DelUserCount();
4506                 }
4507
4508         }
4509
4510         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4511         {
4512                 if (IS_LOCAL(user))
4513                 {
4514                         std::deque<std::string> params;
4515                         params.push_back(user->nick);
4516                         DoOneToMany(oldnick,"NICK",params);
4517                 }
4518         }
4519
4520         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4521         {
4522                 if ((source) && (IS_LOCAL(source)))
4523                 {
4524                         std::deque<std::string> params;
4525                         params.push_back(chan->name);
4526                         params.push_back(user->nick);
4527                         params.push_back(":"+reason);
4528                         DoOneToMany(source->nick,"KICK",params);
4529                 }
4530                 else if (!source)
4531                 {
4532                         std::deque<std::string> params;
4533                         params.push_back(chan->name);
4534                         params.push_back(user->nick);
4535                         params.push_back(":"+reason);
4536                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4537                 }
4538         }
4539
4540         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4541         {
4542                 std::deque<std::string> params;
4543                 params.push_back(dest->nick);
4544                 params.push_back(":"+reason);
4545                 DoOneToMany(source->nick,"KILL",params);
4546         }
4547
4548         virtual void OnRehash(const std::string &parameter)
4549         {
4550                 if (parameter != "")
4551                 {
4552                         std::deque<std::string> params;
4553                         params.push_back(parameter);
4554                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4555                         // check for self
4556                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4557                         {
4558                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4559                                 ServerInstance->RehashServer();
4560                         }
4561                 }
4562                 ReadConfiguration(false);
4563         }
4564
4565         // note: the protocol does not allow direct umode +o except
4566         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4567         // locally.
4568         virtual void OnOper(userrec* user, const std::string &opertype)
4569         {
4570                 if (IS_LOCAL(user))
4571                 {
4572                         std::deque<std::string> params;
4573                         params.push_back(opertype);
4574                         DoOneToMany(user->nick,"OPERTYPE",params);
4575                 }
4576         }
4577
4578         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4579         {
4580                 if (IS_LOCAL(source))
4581                 {
4582                         char type[8];
4583                         snprintf(type,8,"%cLINE",linetype);
4584                         std::string stype = type;
4585                         if (adding)
4586                         {
4587                                 char sduration[MAXBUF];
4588                                 snprintf(sduration,MAXBUF,"%ld",duration);
4589                                 std::deque<std::string> params;
4590                                 params.push_back(host);
4591                                 params.push_back(sduration);
4592                                 params.push_back(":"+reason);
4593                                 DoOneToMany(source->nick,stype,params);
4594                         }
4595                         else
4596                         {
4597                                 std::deque<std::string> params;
4598                                 params.push_back(host);
4599                                 DoOneToMany(source->nick,stype,params);
4600                         }
4601                 }
4602         }
4603
4604         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4605         {
4606                 OnLine(source,hostmask,true,'G',duration,reason);
4607         }
4608
4609         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4610         {
4611                 OnLine(source,ipmask,true,'Z',duration,reason);
4612         }
4613
4614         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4615         {
4616                 OnLine(source,nickmask,true,'Q',duration,reason);
4617         }
4618
4619         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4620         {
4621                 OnLine(source,hostmask,true,'E',duration,reason);
4622         }
4623
4624         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4625         {
4626                 OnLine(source,hostmask,false,'G',0,"");
4627         }
4628
4629         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4630         {
4631                 OnLine(source,ipmask,false,'Z',0,"");
4632         }
4633
4634         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4635         {
4636                 OnLine(source,nickmask,false,'Q',0,"");
4637         }
4638
4639         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4640         {
4641                 OnLine(source,hostmask,false,'E',0,"");
4642         }
4643
4644         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4645         {
4646                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4647                 {
4648                         if (target_type == TYPE_USER)
4649                         {
4650                                 userrec* u = (userrec*)dest;
4651                                 std::deque<std::string> params;
4652                                 params.push_back(u->nick);
4653                                 params.push_back(text);
4654                                 DoOneToMany(user->nick,"MODE",params);
4655                         }
4656                         else
4657                         {
4658                                 chanrec* c = (chanrec*)dest;
4659                                 std::deque<std::string> params;
4660                                 params.push_back(c->name);
4661                                 params.push_back(text);
4662                                 DoOneToMany(user->nick,"MODE",params);
4663                         }
4664                 }
4665         }
4666
4667         virtual void OnSetAway(userrec* user)
4668         {
4669                 if (IS_LOCAL(user))
4670                 {
4671                         std::deque<std::string> params;
4672                         params.push_back(":"+std::string(user->awaymsg));
4673                         DoOneToMany(user->nick,"AWAY",params);
4674                 }
4675         }
4676
4677         virtual void OnCancelAway(userrec* user)
4678         {
4679                 if (IS_LOCAL(user))
4680                 {
4681                         std::deque<std::string> params;
4682                         params.clear();
4683                         DoOneToMany(user->nick,"AWAY",params);
4684                 }
4685         }
4686
4687         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4688         {
4689                 TreeSocket* s = (TreeSocket*)opaque;
4690                 if (target)
4691                 {
4692                         if (target_type == TYPE_USER)
4693                         {
4694                                 userrec* u = (userrec*)target;
4695                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4696                         }
4697                         else
4698                         {
4699                                 chanrec* c = (chanrec*)target;
4700                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4701                         }
4702                 }
4703         }
4704
4705         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4706         {
4707                 TreeSocket* s = (TreeSocket*)opaque;
4708                 if (target)
4709                 {
4710                         if (target_type == TYPE_USER)
4711                         {
4712                                 userrec* u = (userrec*)target;
4713                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4714                         }
4715                         else if (target_type == TYPE_OTHER)
4716                         {
4717                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4718                         }
4719                         else if (target_type == TYPE_CHANNEL)
4720                         {
4721                                 chanrec* c = (chanrec*)target;
4722                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4723                         }
4724                 }
4725         }
4726
4727         virtual void OnEvent(Event* event)
4728         {
4729                 if (event->GetEventID() == "send_metadata")
4730                 {
4731                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4732                         if (params->size() < 3)
4733                                 return;
4734                         (*params)[2] = ":" + (*params)[2];
4735                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4736                 }
4737                 else if (event->GetEventID() == "send_mode")
4738                 {
4739                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4740                         if (params->size() < 2)
4741                                 return;
4742                         // Insert the TS value of the object, either userrec or chanrec
4743                         time_t ourTS = 0;
4744                         userrec* a = ServerInstance->FindNick((*params)[0]);
4745                         if (a)
4746                         {
4747                                 ourTS = a->age;
4748                         }
4749                         else
4750                         {
4751                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4752                                 if (a)
4753                                 {
4754                                         ourTS = a->age;
4755                                 }
4756                         }
4757                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4758                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4759                 }
4760         }
4761
4762         virtual ~ModuleSpanningTree()
4763         {
4764         }
4765
4766         virtual Version GetVersion()
4767         {
4768                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4769         }
4770
4771         void Implements(char* List)
4772         {
4773                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4774                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4775                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4776                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4777                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4778                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4779                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
4780         }
4781
4782         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4783          * so that any activity it sees is FINAL, e.g. we arent going to send out
4784          * a NICK message before m_cloaking has finished putting the +x on the user,
4785          * etc etc.
4786          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4787          * the module call queue.
4788          */
4789         Priority Prioritize()
4790         {
4791                 return PRIORITY_LAST;
4792         }
4793 };
4794
4795
4796 class ModuleSpanningTreeFactory : public ModuleFactory
4797 {
4798  public:
4799         ModuleSpanningTreeFactory()
4800         {
4801         }
4802
4803         ~ModuleSpanningTreeFactory()
4804         {
4805         }
4806
4807         virtual Module * CreateModule(InspIRCd* Me)
4808         {
4809                 TreeProtocolModule = new ModuleSpanningTree(Me);
4810                 return TreeProtocolModule;
4811         }
4812
4813 };
4814
4815
4816 extern "C" void * init_module( void )
4817 {
4818         return new ModuleSpanningTreeFactory;
4819 }