src/modules/m_spanningtree/main.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2007-2009 Craig Edwards <craigedwards@brainbox.cc>
   6  *   Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
   7  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   8  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
   9  *
  10  * This file is part of InspIRCd.  InspIRCd is free software: you can
  11  * redistribute it and/or modify it under the terms of the GNU General Public
  12  * License as published by the Free Software Foundation, version 2.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  16  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23
  24 #include "inspircd.h"
  25 #include "socket.h"
  26 #include "xline.h"
  27 #include "iohook.h"
  28
  29 #include "resolvers.h"
  30 #include "main.h"
  31 #include "utils.h"
  32 #include "treeserver.h"
  33 #include "link.h"
  34 #include "treesocket.h"
  35 #include "commands.h"
  36 #include "protocolinterface.h"
  37
  38 ModuleSpanningTree::ModuleSpanningTree()
  39         : commands(NULL), DNS(this, "DNS")
  40 {
  41 }
  42
  43 SpanningTreeCommands::SpanningTreeCommands(ModuleSpanningTree* module)
  44         : rconnect(module), rsquit(module), map(module),
  45         svsjoin(module), svspart(module), svsnick(module), metadata(module),
  46         uid(module), opertype(module), fjoin(module), ijoin(module), resync(module),
  47         fmode(module), ftopic(module), fhost(module), fident(module), fname(module),
  48         away(module), addline(module), delline(module), encap(module), idle(module),
  49         nick(module), ping(module), pong(module), push(module), save(module),
  50         server(module), squit(module), snonotice(module), version(module),
  51         burst(module), endburst(module)
  52 {
  53 }
  54
  55 void ModuleSpanningTree::init()
  56 {
  57         ServerInstance->SNO->EnableSnomask('l', "LINK");
  58
  59         Utils = new SpanningTreeUtilities(this);
  60         Utils->TreeRoot = new TreeServer;
  61         commands = new SpanningTreeCommands(this);
  62         ServerInstance->Modules->AddService(commands->rconnect);
  63         ServerInstance->Modules->AddService(commands->rsquit);
  64         ServerInstance->Modules->AddService(commands->map);
  65
  66         delete ServerInstance->PI;
  67         ServerInstance->PI = new SpanningTreeProtocolInterface;
  68         loopCall = false;
  69
  70         // update our local user count
  71         Utils->TreeRoot->UserCount = ServerInstance->Users->local_users.size();
  72 }
  73
  74 void ModuleSpanningTree::ShowLinks(TreeServer* Current, User* user, int hops)
  75 {
  76         std::string Parent = Utils->TreeRoot->GetName();
  77         if (Current->GetParent())
  78         {
  79                 Parent = Current->GetParent()->GetName();
  80         }
  81
  82         const TreeServer::ChildServers& children = Current->GetChildren();
  83         for (TreeServer::ChildServers::const_iterator i = children.begin(); i != children.end(); ++i)
  84         {
  85                 TreeServer* server = *i;
  86                 if ((server->Hidden) || ((Utils->HideULines) && (ServerInstance->ULine(server->GetName()))))
  87                 {
  88                         if (user->IsOper())
  89                         {
  90                                  ShowLinks(server, user, hops+1);
  91                         }
  92                 }
  93                 else
  94                 {
  95                         ShowLinks(server, user, hops+1);
  96                 }
  97         }
  98         /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
  99         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName())) && (!user->IsOper()))
 100                 return;
 101         /* Or if the server is hidden and they're not an oper */
 102         else if ((Current->Hidden) && (!user->IsOper()))
 103                 return;
 104
 105         user->WriteNumeric(364, "%s %s %s :%d %s",      user->nick.c_str(), Current->GetName().c_str(),
 106                         (Utils->FlatLinks && (!user->IsOper())) ? ServerInstance->Config->ServerName.c_str() : Parent.c_str(),
 107                         (Utils->FlatLinks && (!user->IsOper())) ? 0 : hops,
 108                         Current->GetDesc().c_str());
 109 }
 110
 111 void ModuleSpanningTree::HandleLinks(const std::vector<std::string>& parameters, User* user)
 112 {
 113         ShowLinks(Utils->TreeRoot,user,0);
 114         user->WriteNumeric(365, "%s * :End of /LINKS list.",user->nick.c_str());
 115 }
 116
 117 std::string ModuleSpanningTree::TimeToStr(time_t secs)
 118 {
 119         time_t mins_up = secs / 60;
 120         time_t hours_up = mins_up / 60;
 121         time_t days_up = hours_up / 24;
 122         secs = secs % 60;
 123         mins_up = mins_up % 60;
 124         hours_up = hours_up % 24;
 125         return ((days_up ? (ConvToStr(days_up) + "d") : "")
 126                         + (hours_up ? (ConvToStr(hours_up) + "h") : "")
 127                         + (mins_up ? (ConvToStr(mins_up) + "m") : "")
 128                         + ConvToStr(secs) + "s");
 129 }
 130
 131 void ModuleSpanningTree::DoPingChecks(time_t curtime)
 132 {
 133         /*
 134          * Cancel remote burst mode on any servers which still have it enabled due to latency/lack of data.
 135          * This prevents lost REMOTECONNECT notices
 136          */
 137         long ts = ServerInstance->Time() * 1000 + (ServerInstance->Time_ns() / 1000000);
 138
 139 restart:
 140         for (server_hash::iterator i = Utils->serverlist.begin(); i != Utils->serverlist.end(); i++)
 141         {
 142                 TreeServer *s = i->second;
 143
 144                 // Skip myself
 145                 if (s->IsRoot())
 146                         continue;
 147
 148                 if (s->GetSocket()->GetLinkState() == DYING)
 149                 {
 150                         s->GetSocket()->Close();
 151                         goto restart;
 152                 }
 153
 154                 // Do not ping servers that are not fully connected yet!
 155                 // Servers which are connected to us have IsLocal() == true and if they're fully connected
 156                 // then Socket->LinkState == CONNECTED. Servers that are linked to another server are always fully connected.
 157                 if (s->IsLocal() && s->GetSocket()->GetLinkState() != CONNECTED)
 158                         continue;
 159
 160                 // Now do PING checks on all servers
 161                 // Only ping if this server needs one
 162                 if (curtime >= s->NextPingTime())
 163                 {
 164                         // And if they answered the last
 165                         if (s->AnsweredLastPing())
 166                         {
 167                                 // They did, send a ping to them
 168                                 s->SetNextPingTime(curtime + Utils->PingFreq);
 169                                 s->GetSocket()->WriteLine(":" + ServerInstance->Config->GetSID() + " PING " + s->GetID());
 170                                 s->LastPingMsec = ts;
 171                         }
 172                         else
 173                         {
 174                                 // They didn't answer the last ping, if they are locally connected, get rid of them.
 175                                 if (s->IsLocal())
 176                                 {
 177                                         TreeSocket* sock = s->GetSocket();
 178                                         sock->SendError("Ping timeout");
 179                                         sock->Close();
 180                                         goto restart;
 181                                 }
 182                         }
 183                 }
 184
 185                 // If warn on ping enabled and not warned and the difference is sufficient and they didn't answer the last ping...
 186                 if ((Utils->PingWarnTime) && (!s->Warned) && (curtime >= s->NextPingTime() - (Utils->PingFreq - Utils->PingWarnTime)) && (!s->AnsweredLastPing()))
 187                 {
 188                         /* The server hasnt responded, send a warning to opers */
 189                         ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 has not responded to PING for %d seconds, high latency.", s->GetName().c_str(), Utils->PingWarnTime);
 190                         s->Warned = true;
 191                 }
 192         }
 193 }
 194
 195 void ModuleSpanningTree::ConnectServer(Autoconnect* a, bool on_timer)
 196 {
 197         if (!a)
 198                 return;
 199         for(unsigned int j=0; j < a->servers.size(); j++)
 200         {
 201                 if (Utils->FindServer(a->servers[j]))
 202                 {
 203                         // found something in this block. Should the server fail,
 204                         // we want to start at the start of the list, not in the
 205                         // middle where we left off
 206                         a->position = -1;
 207                         return;
 208                 }
 209         }
 210         if (on_timer && a->position >= 0)
 211                 return;
 212         if (!on_timer && a->position < 0)
 213                 return;
 214
 215         a->position++;
 216         while (a->position < (int)a->servers.size())
 217         {
 218                 Link* x = Utils->FindLink(a->servers[a->position]);
 219                 if (x)
 220                 {
 221                         ServerInstance->SNO->WriteToSnoMask('l', "AUTOCONNECT: Auto-connecting server \002%s\002", x->Name.c_str());
 222                         ConnectServer(x, a);
 223                         return;
 224                 }
 225                 a->position++;
 226         }
 227         // Autoconnect chain has been fully iterated; start at the beginning on the
 228         // next AutoConnectServers run
 229         a->position = -1;
 230 }
 231
 232 void ModuleSpanningTree::ConnectServer(Link* x, Autoconnect* y)
 233 {
 234         bool ipvalid = true;
 235
 236         if (InspIRCd::Match(ServerInstance->Config->ServerName, assign(x->Name)))
 237         {
 238                 ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Not connecting to myself.");
 239                 return;
 240         }
 241
 242         DNS::QueryType start_type = DNS::QUERY_AAAA;
 243         if (strchr(x->IPAddr.c_str(),':'))
 244         {
 245                 in6_addr n;
 246                 if (inet_pton(AF_INET6, x->IPAddr.c_str(), &n) < 1)
 247                         ipvalid = false;
 248         }
 249         else
 250         {
 251                 in_addr n;
 252                 if (inet_aton(x->IPAddr.c_str(),&n) < 1)
 253                         ipvalid = false;
 254         }
 255
 256         /* Do we already have an IP? If so, no need to resolve it. */
 257         if (ipvalid)
 258         {
 259                 /* Gave a hook, but it wasnt one we know */
 260                 TreeSocket* newsocket = new TreeSocket(x, y, x->IPAddr);
 261                 if (newsocket->GetFd() > -1)
 262                 {
 263                         /* Handled automatically on success */
 264                 }
 265                 else
 266                 {
 267                         ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",
 268                                 x->Name.c_str(), newsocket->getError().c_str());
 269                         ServerInstance->GlobalCulls.AddItem(newsocket);
 270                 }
 271         }
 272         else if (!DNS)
 273         {
 274                 ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: Hostname given and m_dns.so is not loaded, unable to resolve.", x->Name.c_str());
 275         }
 276         else
 277         {
 278                 ServernameResolver* snr = new ServernameResolver(*DNS, x->IPAddr, x, start_type, y);
 279                 try
 280                 {
 281                         DNS->Process(snr);
 282                 }
 283                 catch (DNS::Exception& e)
 284                 {
 285                         delete snr;
 286                         ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(), e.GetReason());
 287                         ConnectServer(y, false);
 288                 }
 289         }
 290 }
 291
 292 void ModuleSpanningTree::AutoConnectServers(time_t curtime)
 293 {
 294         for (std::vector<reference<Autoconnect> >::iterator i = Utils->AutoconnectBlocks.begin(); i < Utils->AutoconnectBlocks.end(); ++i)
 295         {
 296                 Autoconnect* x = *i;
 297                 if (curtime >= x->NextConnectTime)
 298                 {
 299                         x->NextConnectTime = curtime + x->Period;
 300                         ConnectServer(x, true);
 301                 }
 302         }
 303 }
 304
 305 void ModuleSpanningTree::DoConnectTimeout(time_t curtime)
 306 {
 307         std::map<TreeSocket*, std::pair<std::string, int> >::iterator i = Utils->timeoutlist.begin();
 308         while (i != Utils->timeoutlist.end())
 309         {
 310                 TreeSocket* s = i->first;
 311                 std::pair<std::string, int> p = i->second;
 312                 std::map<TreeSocket*, std::pair<std::string, int> >::iterator me = i;
 313                 i++;
 314                 if (s->GetLinkState() == DYING)
 315                 {
 316                         Utils->timeoutlist.erase(me);
 317                         s->Close();
 318                 }
 319                 else if (curtime > s->age + p.second)
 320                 {
 321                         ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002 (timeout of %d seconds)",p.first.c_str(),p.second);
 322                         Utils->timeoutlist.erase(me);
 323                         s->Close();
 324                 }
 325         }
 326 }
 327
 328 ModResult ModuleSpanningTree::HandleVersion(const std::vector<std::string>& parameters, User* user)
 329 {
 330         // we've already checked if pcnt > 0, so this is safe
 331         TreeServer* found = Utils->FindServerMask(parameters[0]);
 332         if (found)
 333         {
 334                 if (found == Utils->TreeRoot)
 335                 {
 336                         // Pass to default VERSION handler.
 337                         return MOD_RES_PASSTHRU;
 338                 }
 339                 std::string Version = found->GetVersion();
 340                 user->WriteNumeric(351, "%s :%s",user->nick.c_str(),Version.c_str());
 341         }
 342         else
 343         {
 344                 user->WriteNumeric(402, "%s %s :No such server",user->nick.c_str(),parameters[0].c_str());
 345         }
 346         return MOD_RES_DENY;
 347 }
 348
 349 /* This method will attempt to get a message to a remote user.
 350  */
 351 void ModuleSpanningTree::RemoteMessage(User* user, const char* format, ...)
 352 {
 353         std::string text;
 354         VAFORMAT(text, format, format);
 355
 356         if (IS_LOCAL(user))
 357                 user->WriteNotice(text);
 358         else
 359                 ServerInstance->PI->SendUserNotice(user, text);
 360 }
 361
 362 ModResult ModuleSpanningTree::HandleConnect(const std::vector<std::string>& parameters, User* user)
 363 {
 364         for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); i++)
 365         {
 366                 Link* x = *i;
 367                 if (InspIRCd::Match(x->Name.c_str(),parameters[0]))
 368                 {
 369                         if (InspIRCd::Match(ServerInstance->Config->ServerName, assign(x->Name)))
 370                         {
 371                                 RemoteMessage(user, "*** CONNECT: Server \002%s\002 is ME, not connecting.",x->Name.c_str());
 372                                 return MOD_RES_DENY;
 373                         }
 374
 375                         TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
 376                         if (!CheckDupe)
 377                         {
 378                                 RemoteMessage(user, "*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
 379                                 ConnectServer(x);
 380                                 return MOD_RES_DENY;
 381                         }
 382                         else
 383                         {
 384                                 RemoteMessage(user, "*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002", x->Name.c_str(), CheckDupe->GetParent()->GetName().c_str());
 385                                 return MOD_RES_DENY;
 386                         }
 387                 }
 388         }
 389         RemoteMessage(user, "*** CONNECT: No server matching \002%s\002 could be found in the config file.",parameters[0].c_str());
 390         return MOD_RES_DENY;
 391 }
 392
 393 void ModuleSpanningTree::On005Numeric(std::map<std::string, std::string>& tokens)
 394 {
 395         tokens["MAP"];
 396 }
 397
 398 void ModuleSpanningTree::OnGetServerDescription(const std::string &servername,std::string &description)
 399 {
 400         TreeServer* s = Utils->FindServer(servername);
 401         if (s)
 402         {
 403                 description = s->GetDesc();
 404         }
 405 }
 406
 407 void ModuleSpanningTree::OnUserInvite(User* source,User* dest,Channel* channel, time_t expiry)
 408 {
 409         if (IS_LOCAL(source))
 410         {
 411                 CmdBuilder params(source, "INVITE");
 412                 params.push_back(dest->uuid);
 413                 params.push_back(channel->name);
 414                 params.push_back(ConvToStr(expiry));
 415                 params.Broadcast();
 416         }
 417 }
 418
 419 void ModuleSpanningTree::OnPostTopicChange(User* user, Channel* chan, const std::string &topic)
 420 {
 421         // Drop remote events on the floor.
 422         if (!IS_LOCAL(user))
 423                 return;
 424
 425         CmdBuilder params(user->uuid, "TOPIC");
 426         params.push_back(chan->name);
 427         params.push_last(topic);
 428         params.Broadcast();
 429 }
 430
 431 void ModuleSpanningTree::OnUserMessage(User* user, void* dest, int target_type, const std::string& text, char status, const CUList& exempt_list, MessageType msgtype)
 432 {
 433         if (!IS_LOCAL(user))
 434                 return;
 435
 436         const char* message_type = (msgtype == MSG_PRIVMSG ? "PRIVMSG" : "NOTICE");
 437         if (target_type == TYPE_USER)
 438         {
 439                 User* d = (User*) dest;
 440                 if (!IS_LOCAL(d))
 441                 {
 442                         CmdBuilder params(user, message_type);
 443                         params.push_back(d->uuid);
 444                         params.push_last(text);
 445                         params.Unicast(d);
 446                 }
 447         }
 448         else if (target_type == TYPE_CHANNEL)
 449         {
 450                 Utils->SendChannelMessage(user->uuid, (Channel*)dest, text, status, exempt_list, message_type);
 451         }
 452         else if (target_type == TYPE_SERVER)
 453         {
 454                 char* target = (char*) dest;
 455                 CmdBuilder par(user, message_type);
 456                 par.push_back(target);
 457                 par.push_last(text);
 458                 par.Broadcast();
 459         }
 460 }
 461
 462 void ModuleSpanningTree::OnBackgroundTimer(time_t curtime)
 463 {
 464         AutoConnectServers(curtime);
 465         DoPingChecks(curtime);
 466         DoConnectTimeout(curtime);
 467 }
 468
 469 void ModuleSpanningTree::OnUserConnect(LocalUser* user)
 470 {
 471         if (user->quitting)
 472                 return;
 473
 474         CommandUID::Builder(user).Broadcast();
 475
 476         if (user->IsOper())
 477                 CommandOpertype::Builder(user).Broadcast();
 478
 479         for(Extensible::ExtensibleStore::const_iterator i = user->GetExtList().begin(); i != user->GetExtList().end(); i++)
 480         {
 481                 ExtensionItem* item = i->first;
 482                 std::string value = item->serialize(FORMAT_NETWORK, user, i->second);
 483                 if (!value.empty())
 484                         ServerInstance->PI->SendMetaData(user, item->name, value);
 485         }
 486
 487         Utils->TreeRoot->UserCount++;
 488 }
 489
 490 void ModuleSpanningTree::OnUserJoin(Membership* memb, bool sync, bool created_by_local, CUList& excepts)
 491 {
 492         // Only do this for local users
 493         if (!IS_LOCAL(memb->user))
 494                 return;
 495
 496         if (created_by_local)
 497         {
 498                 CmdBuilder params("FJOIN");
 499                 params.push_back(memb->chan->name);
 500                 params.push_back(ConvToStr(memb->chan->age));
 501                 params.push_raw(" +").push_raw(memb->chan->ChanModes(true));
 502                 params.push(memb->modes).push_raw(',').push_raw(memb->user->uuid);
 503                 params.Broadcast();
 504         }
 505         else
 506         {
 507                 CmdBuilder params(memb->user, "IJOIN");
 508                 params.push_back(memb->chan->name);
 509                 if (!memb->modes.empty())
 510                 {
 511                         params.push_back(ConvToStr(memb->chan->age));
 512                         params.push_back(memb->modes);
 513                 }
 514                 params.Broadcast();
 515         }
 516 }
 517
 518 void ModuleSpanningTree::OnChangeHost(User* user, const std::string &newhost)
 519 {
 520         if (user->registered != REG_ALL || !IS_LOCAL(user))
 521                 return;
 522
 523         CmdBuilder(user, "FHOST").push(newhost).Broadcast();
 524 }
 525
 526 void ModuleSpanningTree::OnChangeName(User* user, const std::string &gecos)
 527 {
 528         if (user->registered != REG_ALL || !IS_LOCAL(user))
 529                 return;
 530
 531         CmdBuilder(user, "FNAME").push(gecos).Broadcast();
 532 }
 533
 534 void ModuleSpanningTree::OnChangeIdent(User* user, const std::string &ident)
 535 {
 536         if ((user->registered != REG_ALL) || (!IS_LOCAL(user)))
 537                 return;
 538
 539         CmdBuilder(user, "FIDENT").push(ident).Broadcast();
 540 }
 541
 542 void ModuleSpanningTree::OnUserPart(Membership* memb, std::string &partmessage, CUList& excepts)
 543 {
 544         if (IS_LOCAL(memb->user))
 545         {
 546                 CmdBuilder params(memb->user, "PART");
 547                 params.push_back(memb->chan->name);
 548                 if (!partmessage.empty())
 549                         params.push_last(partmessage);
 550                 params.Broadcast();
 551         }
 552 }
 553
 554 void ModuleSpanningTree::OnUserQuit(User* user, const std::string &reason, const std::string &oper_message)
 555 {
 556         if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
 557         {
 558                 if (oper_message != reason)
 559                         ServerInstance->PI->SendMetaData(user, "operquit", oper_message);
 560
 561                 CmdBuilder(user, "QUIT").push_last(reason).Broadcast();
 562         }
 563
 564         // Regardless, We need to modify the user Counts..
 565         TreeServer* SourceServer = Utils->FindServer(user->server);
 566         if (SourceServer)
 567         {
 568                 SourceServer->UserCount--;
 569         }
 570 }
 571
 572 void ModuleSpanningTree::OnUserPostNick(User* user, const std::string &oldnick)
 573 {
 574         if (IS_LOCAL(user))
 575         {
 576                 CmdBuilder params(user, "NICK");
 577                 params.push_back(user->nick);
 578
 579                 /** IMPORTANT: We don't update the TS if the oldnick is just a case change of the newnick!
 580                  */
 581                 if (irc::string(user->nick.c_str()) != assign(oldnick))
 582                         user->age = ServerInstance->Time();
 583
 584                 params.push_back(ConvToStr(user->age));
 585                 params.Broadcast();
 586         }
 587         else if (!loopCall && user->nick == user->uuid)
 588         {
 589                 CmdBuilder params("SAVE");
 590                 params.push_back(user->uuid);
 591                 params.push_back(ConvToStr(user->age));
 592                 params.Broadcast();
 593         }
 594 }
 595
 596 void ModuleSpanningTree::OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& excepts)
 597 {
 598         if ((!IS_LOCAL(source) || source != ServerInstance->FakeClient))
 599                 return;
 600
 601         CmdBuilder params(source, "KICK");
 602         params.push_back(memb->chan->name);
 603         params.push_back(memb->user->uuid);
 604         params.push_last(reason);
 605         params.Broadcast();
 606 }
 607
 608 void ModuleSpanningTree::OnPreRehash(User* user, const std::string &parameter)
 609 {
 610         if (loopCall)
 611                 return; // Don't generate a REHASH here if we're in the middle of processing a message that generated this one
 612
 613         ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "OnPreRehash called with param %s", parameter.c_str());
 614
 615         // Send out to other servers
 616         if (!parameter.empty() && parameter[0] != '-')
 617         {
 618                 CmdBuilder params((user ? user->uuid : ServerInstance->Config->GetSID()), "REHASH");
 619                 params.push_back(parameter);
 620                 params.Forward(user ? Utils->BestRouteTo(user->server) : NULL);
 621         }
 622 }
 623
 624 void ModuleSpanningTree::OnRehash(User* user)
 625 {
 626         // Re-read config stuff
 627         try
 628         {
 629                 Utils->ReadConfiguration();
 630         }
 631         catch (ModuleException& e)
 632         {
 633                 // Refresh the IP cache anyway, so servers read before the error will be allowed to connect
 634                 Utils->RefreshIPCache();
 635                 // Always warn local opers with snomask +l, also warn globally (snomask +L) if the rehash was issued by a remote user
 636                 std::string msg = "Error in configuration: ";
 637                 msg.append(e.GetReason());
 638                 ServerInstance->SNO->WriteToSnoMask('l', msg);
 639                 if (user && !IS_LOCAL(user))
 640                         ServerInstance->PI->SendSNONotice("L", msg);
 641         }
 642 }
 643
 644 void ModuleSpanningTree::OnLoadModule(Module* mod)
 645 {
 646         std::string data;
 647         data.push_back('+');
 648         data.append(mod->ModuleSourceFile);
 649         Version v = mod->GetVersion();
 650         if (!v.link_data.empty())
 651         {
 652                 data.push_back('=');
 653                 data.append(v.link_data);
 654         }
 655         ServerInstance->PI->SendMetaData(NULL, "modules", data);
 656 }
 657
 658 void ModuleSpanningTree::OnUnloadModule(Module* mod)
 659 {
 660         if (!Utils)
 661                 return;
 662         ServerInstance->PI->SendMetaData(NULL, "modules", "-" + mod->ModuleSourceFile);
 663
 664         // Close all connections which use an IO hook provided by this module
 665         const TreeServer::ChildServers& list = Utils->TreeRoot->GetChildren();
 666         for (TreeServer::ChildServers::const_iterator i = list.begin(); i != list.end(); ++i)
 667         {
 668                 TreeSocket* sock = (*i)->GetSocket();
 669                 if (sock && sock->GetIOHook() && sock->GetIOHook()->creator == mod)
 670                 {
 671                         sock->SendError("SSL module unloaded");
 672                         sock->Close();
 673                 }
 674         }
 675 }
 676
 677 // note: the protocol does not allow direct umode +o except
 678 // via NICK with 8 params. sending OPERTYPE infers +o modechange
 679 // locally.
 680 void ModuleSpanningTree::OnOper(User* user, const std::string &opertype)
 681 {
 682         if (user->registered != REG_ALL || !IS_LOCAL(user))
 683                 return;
 684         CommandOpertype::Builder(user).Broadcast();
 685 }
 686
 687 void ModuleSpanningTree::OnAddLine(User* user, XLine *x)
 688 {
 689         if (!x->IsBurstable() || loopCall || (user && !IS_LOCAL(user)))
 690                 return;
 691
 692         if (!user)
 693                 user = ServerInstance->FakeClient;
 694
 695         CommandAddLine::Builder(x, user).Broadcast();
 696 }
 697
 698 void ModuleSpanningTree::OnDelLine(User* user, XLine *x)
 699 {
 700         if (!x->IsBurstable() || loopCall || (user && !IS_LOCAL(user)))
 701                 return;
 702
 703         if (!user)
 704                 user = ServerInstance->FakeClient;
 705
 706         CmdBuilder params(user, "DELLINE");
 707         params.push_back(x->type);
 708         params.push_back(x->Displayable());
 709         params.Broadcast();
 710 }
 711
 712 ModResult ModuleSpanningTree::OnSetAway(User* user, const std::string &awaymsg)
 713 {
 714         if (IS_LOCAL(user))
 715                 CommandAway::Builder(user, awaymsg).Broadcast();
 716
 717         return MOD_RES_PASSTHRU;
 718 }
 719
 720 void ModuleSpanningTree::ProtoSendMode(void* opaque, TargetTypeFlags target_type, void* target, const parameterlist &modeline, const std::vector<TranslateType> &translate)
 721 {
 722         TreeSocket* s = (TreeSocket*)opaque;
 723         std::string output_text = CommandParser::TranslateUIDs(translate, modeline);
 724
 725         if (target)
 726         {
 727                 if (target_type == TYPE_USER)
 728                 {
 729                         User* u = (User*)target;
 730                         s->WriteLine(":"+ServerInstance->Config->GetSID()+" MODE "+u->uuid+" "+output_text);
 731                 }
 732                 else if (target_type == TYPE_CHANNEL)
 733                 {
 734                         Channel* c = (Channel*)target;
 735                         s->WriteLine(":"+ServerInstance->Config->GetSID()+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+output_text);
 736                 }
 737         }
 738 }
 739
 740 void ModuleSpanningTree::ProtoSendMetaData(void* opaque, Extensible* target, const std::string &extname, const std::string &extdata)
 741 {
 742         TreeSocket* s = static_cast<TreeSocket*>(opaque);
 743         User* u = dynamic_cast<User*>(target);
 744         Channel* c = dynamic_cast<Channel*>(target);
 745         if (u)
 746                 s->WriteLine(":"+ServerInstance->Config->GetSID()+" METADATA "+u->uuid+" "+extname+" :"+extdata);
 747         else if (c)
 748                 s->WriteLine(":"+ServerInstance->Config->GetSID()+" METADATA "+c->name+" "+ConvToStr(c->age)+" "+extname+" :"+extdata);
 749         else if (!target)
 750                 s->WriteLine(":"+ServerInstance->Config->GetSID()+" METADATA * "+extname+" :"+extdata);
 751 }
 752
 753 CullResult ModuleSpanningTree::cull()
 754 {
 755         if (Utils)
 756                 Utils->cull();
 757         return this->Module::cull();
 758 }
 759
 760 ModuleSpanningTree::~ModuleSpanningTree()
 761 {
 762         delete ServerInstance->PI;
 763         ServerInstance->PI = new ProtocolInterface;
 764
 765         /* This will also free the listeners */
 766         delete Utils;
 767
 768         delete commands;
 769 }
 770
 771 Version ModuleSpanningTree::GetVersion()
 772 {
 773         return Version("Allows servers to be linked", VF_VENDOR);
 774 }
 775
 776 /* It is IMPORTANT that m_spanningtree is the last module in the chain
 777  * so that any activity it sees is FINAL, e.g. we arent going to send out
 778  * a NICK message before m_cloaking has finished putting the +x on the user,
 779  * etc etc.
 780  * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
 781  * the module call queue.
 782  */
 783 void ModuleSpanningTree::Prioritize()
 784 {
 785         ServerInstance->Modules->SetPriority(this, PRIORITY_LAST);
 786 }
 787
 788 MODULE_INIT(ModuleSpanningTree)