src/modules/m_spanningtree.cpp

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