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
  37 ModuleSpanningTree::ModuleSpanningTree()
  38         : rconnect(this), rsquit(this), map(this)
  39         , commands(NULL)
  40         , currmembid(0)
  41         , DNS(this, "DNS")
  42         , loopCall(false)
  43         , SplitInProgress(false)
  44 {
  45 }
  46
  47 SpanningTreeCommands::SpanningTreeCommands(ModuleSpanningTree* module)
  48         : svsjoin(module), svspart(module), svsnick(module), metadata(module),
  49         uid(module), opertype(module), fjoin(module), ijoin(module), resync(module),
  50         fmode(module), ftopic(module), fhost(module), fident(module), fname(module),
  51         away(module), addline(module), delline(module), encap(module), idle(module),
  52         nick(module), ping(module), pong(module), push(module), save(module),
  53         server(module), squit(module), snonotice(module),
  54         burst(module), endburst(module), sinfo(module)
  55 {
  56 }
  57
  58 namespace
  59 {
  60         void SetLocalUsersServer(Server* newserver)
  61         {
  62                 // Does not change the server of quitting users because those are not in the list
  63
  64                 ServerInstance->FakeClient->server = newserver;
  65                 const LocalUserList& list = ServerInstance->Users->local_users;
  66                 for (LocalUserList::const_iterator i = list.begin(); i != list.end(); ++i)
  67                         (*i)->server = newserver;
  68         }
  69
  70         void ResetMembershipIds()
  71         {
  72                 // Set all membership ids to 0
  73                 const LocalUserList& list = ServerInstance->Users->local_users;
  74                 for (LocalUserList::iterator i = list.begin(); i != list.end(); ++i)
  75                 {
  76                         LocalUser* user = *i;
  77                         for (User::ChanList::iterator j = user->chans.begin(); j != user->chans.end(); ++j)
  78                                 (*j)->id = 0;
  79                 }
  80         }
  81 }
  82
  83 void ModuleSpanningTree::init()
  84 {
  85         ServerInstance->SNO->EnableSnomask('l', "LINK");
  86
  87         ResetMembershipIds();
  88
  89         Utils = new SpanningTreeUtilities(this);
  90         Utils->TreeRoot = new TreeServer;
  91         commands = new SpanningTreeCommands(this);
  92
  93         ServerInstance->PI = &protocolinterface;
  94
  95         delete ServerInstance->FakeClient->server;
  96         SetLocalUsersServer(Utils->TreeRoot);
  97 }
  98
  99 void ModuleSpanningTree::ShowLinks(TreeServer* Current, User* user, int hops)
 100 {
 101         std::string Parent = Utils->TreeRoot->GetName();
 102         if (Current->GetParent())
 103         {
 104                 Parent = Current->GetParent()->GetName();
 105         }
 106
 107         const TreeServer::ChildServers& children = Current->GetChildren();
 108         for (TreeServer::ChildServers::const_iterator i = children.begin(); i != children.end(); ++i)
 109         {
 110                 TreeServer* server = *i;
 111                 if ((server->Hidden) || ((Utils->HideULines) && (server->IsULine())))
 112                 {
 113                         if (user->IsOper())
 114                         {
 115                                  ShowLinks(server, user, hops+1);
 116                         }
 117                 }
 118                 else
 119                 {
 120                         ShowLinks(server, user, hops+1);
 121                 }
 122         }
 123         /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
 124         if ((Utils->HideULines) && (Current->IsULine()) && (!user->IsOper()))
 125                 return;
 126         /* Or if the server is hidden and they're not an oper */
 127         else if ((Current->Hidden) && (!user->IsOper()))
 128                 return;
 129
 130         user->WriteNumeric(RPL_LINKS, "%s %s :%d %s",   Current->GetName().c_str(),
 131                         (Utils->FlatLinks && (!user->IsOper())) ? ServerInstance->Config->ServerName.c_str() : Parent.c_str(),
 132                         (Utils->FlatLinks && (!user->IsOper())) ? 0 : hops,
 133                         Current->GetDesc().c_str());
 134 }
 135
 136 void ModuleSpanningTree::HandleLinks(const std::vector<std::string>& parameters, User* user)
 137 {
 138         ShowLinks(Utils->TreeRoot,user,0);
 139         user->WriteNumeric(RPL_ENDOFLINKS, "* :End of /LINKS list.");
 140 }
 141
 142 std::string ModuleSpanningTree::TimeToStr(time_t secs)
 143 {
 144         time_t mins_up = secs / 60;
 145         time_t hours_up = mins_up / 60;
 146         time_t days_up = hours_up / 24;
 147         secs = secs % 60;
 148         mins_up = mins_up % 60;
 149         hours_up = hours_up % 24;
 150         return ((days_up ? (ConvToStr(days_up) + "d") : "")
 151                         + (hours_up ? (ConvToStr(hours_up) + "h") : "")
 152                         + (mins_up ? (ConvToStr(mins_up) + "m") : "")
 153                         + ConvToStr(secs) + "s");
 154 }
 155
 156 void ModuleSpanningTree::DoPingChecks(time_t curtime)
 157 {
 158         /*
 159          * Cancel remote burst mode on any servers which still have it enabled due to latency/lack of data.
 160          * This prevents lost REMOTECONNECT notices
 161          */
 162         long ts = ServerInstance->Time() * 1000 + (ServerInstance->Time_ns() / 1000000);
 163
 164 restart:
 165         for (server_hash::iterator i = Utils->serverlist.begin(); i != Utils->serverlist.end(); i++)
 166         {
 167                 TreeServer *s = i->second;
 168
 169                 // Skip myself
 170                 if (s->IsRoot())
 171                         continue;
 172
 173                 if (s->GetSocket()->GetLinkState() == DYING)
 174                 {
 175                         s->GetSocket()->Close();
 176                         goto restart;
 177                 }
 178
 179                 // Do not ping servers that are not fully connected yet!
 180                 // Servers which are connected to us have IsLocal() == true and if they're fully connected
 181                 // then Socket->LinkState == CONNECTED. Servers that are linked to another server are always fully connected.
 182                 if (s->IsLocal() && s->GetSocket()->GetLinkState() != CONNECTED)
 183                         continue;
 184
 185                 // Now do PING checks on all servers
 186                 // Only ping if this server needs one
 187                 if (curtime >= s->NextPingTime())
 188                 {
 189                         // And if they answered the last
 190                         if (s->AnsweredLastPing())
 191                         {
 192                                 // They did, send a ping to them
 193                                 s->SetNextPingTime(curtime + Utils->PingFreq);
 194                                 s->GetSocket()->WriteLine(CmdBuilder("PING").push(s->GetID()));
 195                                 s->LastPingMsec = ts;
 196                         }
 197                         else
 198                         {
 199                                 // They didn't answer the last ping, if they are locally connected, get rid of them.
 200                                 if (s->IsLocal())
 201                                 {
 202                                         TreeSocket* sock = s->GetSocket();
 203                                         sock->SendError("Ping timeout");
 204                                         sock->Close();
 205                                         goto restart;
 206                                 }
 207                         }
 208                 }
 209
 210                 // If warn on ping enabled and not warned and the difference is sufficient and they didn't answer the last ping...
 211                 if ((Utils->PingWarnTime) && (!s->Warned) && (curtime >= s->NextPingTime() - (Utils->PingFreq - Utils->PingWarnTime)) && (!s->AnsweredLastPing()))
 212                 {
 213                         /* The server hasnt responded, send a warning to opers */
 214                         ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 has not responded to PING for %d seconds, high latency.", s->GetName().c_str(), Utils->PingWarnTime);
 215                         s->Warned = true;
 216                 }
 217         }
 218 }
 219
 220 void ModuleSpanningTree::ConnectServer(Autoconnect* a, bool on_timer)
 221 {
 222         if (!a)
 223                 return;
 224         for(unsigned int j=0; j < a->servers.size(); j++)
 225         {
 226                 if (Utils->FindServer(a->servers[j]))
 227                 {
 228                         // found something in this block. Should the server fail,
 229                         // we want to start at the start of the list, not in the
 230                         // middle where we left off
 231                         a->position = -1;
 232                         return;
 233                 }
 234         }
 235         if (on_timer && a->position >= 0)
 236                 return;
 237         if (!on_timer && a->position < 0)
 238                 return;
 239
 240         a->position++;
 241         while (a->position < (int)a->servers.size())
 242         {
 243                 Link* x = Utils->FindLink(a->servers[a->position]);
 244                 if (x)
 245                 {
 246                         ServerInstance->SNO->WriteToSnoMask('l', "AUTOCONNECT: Auto-connecting server \002%s\002", x->Name.c_str());
 247                         ConnectServer(x, a);
 248                         return;
 249                 }
 250                 a->position++;
 251         }
 252         // Autoconnect chain has been fully iterated; start at the beginning on the
 253         // next AutoConnectServers run
 254         a->position = -1;
 255 }
 256
 257 void ModuleSpanningTree::ConnectServer(Link* x, Autoconnect* y)
 258 {
 259         bool ipvalid = true;
 260
 261         if (InspIRCd::Match(ServerInstance->Config->ServerName, assign(x->Name), rfc_case_insensitive_map))
 262         {
 263                 ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Not connecting to myself.");
 264                 return;
 265         }
 266
 267         DNS::QueryType start_type = DNS::QUERY_AAAA;
 268         if (strchr(x->IPAddr.c_str(),':'))
 269         {
 270                 in6_addr n;
 271                 if (inet_pton(AF_INET6, x->IPAddr.c_str(), &n) < 1)
 272                         ipvalid = false;
 273         }
 274         else
 275         {
 276                 in_addr n;
 277                 if (inet_aton(x->IPAddr.c_str(),&n) < 1)
 278                         ipvalid = false;
 279         }
 280
 281         /* Do we already have an IP? If so, no need to resolve it. */
 282         if (ipvalid)
 283         {
 284                 /* Gave a hook, but it wasnt one we know */
 285                 TreeSocket* newsocket = new TreeSocket(x, y, x->IPAddr);
 286                 if (newsocket->GetFd() > -1)
 287                 {
 288                         /* Handled automatically on success */
 289                 }
 290                 else
 291                 {
 292                         ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",
 293                                 x->Name.c_str(), newsocket->getError().c_str());
 294                         ServerInstance->GlobalCulls.AddItem(newsocket);
 295                 }
 296         }
 297         else if (!DNS)
 298         {
 299                 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());
 300         }
 301         else
 302         {
 303                 ServernameResolver* snr = new ServernameResolver(*DNS, x->IPAddr, x, start_type, y);
 304                 try
 305                 {
 306                         DNS->Process(snr);
 307                 }
 308                 catch (DNS::Exception& e)
 309                 {
 310                         delete snr;
 311                         ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(), e.GetReason().c_str());
 312                         ConnectServer(y, false);
 313                 }
 314         }
 315 }
 316
 317 void ModuleSpanningTree::AutoConnectServers(time_t curtime)
 318 {
 319         for (std::vector<reference<Autoconnect> >::iterator i = Utils->AutoconnectBlocks.begin(); i < Utils->AutoconnectBlocks.end(); ++i)
 320         {
 321                 Autoconnect* x = *i;
 322                 if (curtime >= x->NextConnectTime)
 323                 {
 324                         x->NextConnectTime = curtime + x->Period;
 325                         ConnectServer(x, true);
 326                 }
 327         }
 328 }
 329
 330 void ModuleSpanningTree::DoConnectTimeout(time_t curtime)
 331 {
 332         std::map<TreeSocket*, std::pair<std::string, int> >::iterator i = Utils->timeoutlist.begin();
 333         while (i != Utils->timeoutlist.end())
 334         {
 335                 TreeSocket* s = i->first;
 336                 std::pair<std::string, int> p = i->second;
 337                 std::map<TreeSocket*, std::pair<std::string, int> >::iterator me = i;
 338                 i++;
 339                 if (s->GetLinkState() == DYING)
 340                 {
 341                         Utils->timeoutlist.erase(me);
 342                         s->Close();
 343                 }
 344                 else if (curtime > s->age + p.second)
 345                 {
 346                         ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002 (timeout of %d seconds)",p.first.c_str(),p.second);
 347                         Utils->timeoutlist.erase(me);
 348                         s->Close();
 349                 }
 350         }
 351 }
 352
 353 ModResult ModuleSpanningTree::HandleVersion(const std::vector<std::string>& parameters, User* user)
 354 {
 355         // we've already checked if pcnt > 0, so this is safe
 356         TreeServer* found = Utils->FindServerMask(parameters[0]);
 357         if (found)
 358         {
 359                 if (found == Utils->TreeRoot)
 360                 {
 361                         // Pass to default VERSION handler.
 362                         return MOD_RES_PASSTHRU;
 363                 }
 364
 365                 // If an oper wants to see the version then show the full version string instead of the normal,
 366                 // but only if it is non-empty.
 367                 // If it's empty it might be that the server is still syncing (full version hasn't arrived yet)
 368                 // or the server is a 2.0 server and does not send a full version.
 369                 bool showfull = ((user->IsOper()) && (!found->GetFullVersion().empty()));
 370                 const std::string& Version = (showfull ? found->GetFullVersion() : found->GetVersion());
 371                 user->WriteNumeric(RPL_VERSION, ":%s", Version.c_str());
 372         }
 373         else
 374         {
 375                 user->WriteNumeric(ERR_NOSUCHSERVER, "%s :No such server", parameters[0].c_str());
 376         }
 377         return MOD_RES_DENY;
 378 }
 379
 380 /* This method will attempt to get a message to a remote user.
 381  */
 382 void ModuleSpanningTree::RemoteMessage(User* user, const char* format, ...)
 383 {
 384         std::string text;
 385         VAFORMAT(text, format, format);
 386
 387         if (IS_LOCAL(user))
 388                 user->WriteNotice(text);
 389         else
 390                 ServerInstance->PI->SendUserNotice(user, text);
 391 }
 392
 393 ModResult ModuleSpanningTree::HandleConnect(const std::vector<std::string>& parameters, User* user)
 394 {
 395         for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); i++)
 396         {
 397                 Link* x = *i;
 398                 if (InspIRCd::Match(x->Name.c_str(),parameters[0], rfc_case_insensitive_map))
 399                 {
 400                         if (InspIRCd::Match(ServerInstance->Config->ServerName, assign(x->Name), rfc_case_insensitive_map))
 401                         {
 402                                 RemoteMessage(user, "*** CONNECT: Server \002%s\002 is ME, not connecting.",x->Name.c_str());
 403                                 return MOD_RES_DENY;
 404                         }
 405
 406                         TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
 407                         if (!CheckDupe)
 408                         {
 409                                 RemoteMessage(user, "*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
 410                                 ConnectServer(x);
 411                                 return MOD_RES_DENY;
 412                         }
 413                         else
 414                         {
 415                                 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());
 416                                 return MOD_RES_DENY;
 417                         }
 418                 }
 419         }
 420         RemoteMessage(user, "*** CONNECT: No server matching \002%s\002 could be found in the config file.",parameters[0].c_str());
 421         return MOD_RES_DENY;
 422 }
 423
 424 void ModuleSpanningTree::On005Numeric(std::map<std::string, std::string>& tokens)
 425 {
 426         tokens["MAP"];
 427 }
 428
 429 void ModuleSpanningTree::OnUserInvite(User* source,User* dest,Channel* channel, time_t expiry)
 430 {
 431         if (IS_LOCAL(source))
 432         {
 433                 CmdBuilder params(source, "INVITE");
 434                 params.push_back(dest->uuid);
 435                 params.push_back(channel->name);
 436                 params.push_int(channel->age);
 437                 params.push_back(ConvToStr(expiry));
 438                 params.Broadcast();
 439         }
 440 }
 441
 442 void ModuleSpanningTree::OnPostTopicChange(User* user, Channel* chan, const std::string &topic)
 443 {
 444         // Drop remote events on the floor.
 445         if (!IS_LOCAL(user))
 446                 return;
 447
 448         CommandFTopic::Builder(user, chan).Broadcast();
 449 }
 450
 451 void ModuleSpanningTree::OnUserMessage(User* user, void* dest, int target_type, const std::string& text, char status, const CUList& exempt_list, MessageType msgtype)
 452 {
 453         if (!IS_LOCAL(user))
 454                 return;
 455
 456         const char* message_type = (msgtype == MSG_PRIVMSG ? "PRIVMSG" : "NOTICE");
 457         if (target_type == TYPE_USER)
 458         {
 459                 User* d = (User*) dest;
 460                 if (!IS_LOCAL(d))
 461                 {
 462                         CmdBuilder params(user, message_type);
 463                         params.push_back(d->uuid);
 464                         params.push_last(text);
 465                         params.Unicast(d);
 466                 }
 467         }
 468         else if (target_type == TYPE_CHANNEL)
 469         {
 470                 Utils->SendChannelMessage(user->uuid, (Channel*)dest, text, status, exempt_list, message_type);
 471         }
 472         else if (target_type == TYPE_SERVER)
 473         {
 474                 char* target = (char*) dest;
 475                 CmdBuilder par(user, message_type);
 476                 par.push_back(target);
 477                 par.push_last(text);
 478                 par.Broadcast();
 479         }
 480 }
 481
 482 void ModuleSpanningTree::OnBackgroundTimer(time_t curtime)
 483 {
 484         AutoConnectServers(curtime);
 485         DoPingChecks(curtime);
 486         DoConnectTimeout(curtime);
 487 }
 488
 489 void ModuleSpanningTree::OnUserConnect(LocalUser* user)
 490 {
 491         if (user->quitting)
 492                 return;
 493
 494         CommandUID::Builder(user).Broadcast();
 495
 496         if (user->IsOper())
 497                 CommandOpertype::Builder(user).Broadcast();
 498
 499         for(Extensible::ExtensibleStore::const_iterator i = user->GetExtList().begin(); i != user->GetExtList().end(); i++)
 500         {
 501                 ExtensionItem* item = i->first;
 502                 std::string value = item->serialize(FORMAT_NETWORK, user, i->second);
 503                 if (!value.empty())
 504                         ServerInstance->PI->SendMetaData(user, item->name, value);
 505         }
 506
 507         Utils->TreeRoot->UserCount++;
 508 }
 509
 510 void ModuleSpanningTree::OnUserJoin(Membership* memb, bool sync, bool created_by_local, CUList& excepts)
 511 {
 512         // Only do this for local users
 513         if (!IS_LOCAL(memb->user))
 514                 return;
 515
 516         // Assign the current membership id to the new Membership and increase it
 517         memb->id = currmembid++;
 518
 519         if (created_by_local)
 520         {
 521                 CommandFJoin::Builder params(memb->chan);
 522                 params.add(memb);
 523                 params.finalize();
 524                 params.Broadcast();
 525         }
 526         else
 527         {
 528                 CmdBuilder params(memb->user, "IJOIN");
 529                 params.push_back(memb->chan->name);
 530                 params.push_int(memb->id);
 531                 if (!memb->modes.empty())
 532                 {
 533                         params.push_back(ConvToStr(memb->chan->age));
 534                         params.push_back(memb->modes);
 535                 }
 536                 params.Broadcast();
 537         }
 538 }
 539
 540 void ModuleSpanningTree::OnChangeHost(User* user, const std::string &newhost)
 541 {
 542         if (user->registered != REG_ALL || !IS_LOCAL(user))
 543                 return;
 544
 545         CmdBuilder(user, "FHOST").push(newhost).Broadcast();
 546 }
 547
 548 void ModuleSpanningTree::OnChangeName(User* user, const std::string &gecos)
 549 {
 550         if (user->registered != REG_ALL || !IS_LOCAL(user))
 551                 return;
 552
 553         CmdBuilder(user, "FNAME").push_last(gecos).Broadcast();
 554 }
 555
 556 void ModuleSpanningTree::OnChangeIdent(User* user, const std::string &ident)
 557 {
 558         if ((user->registered != REG_ALL) || (!IS_LOCAL(user)))
 559                 return;
 560
 561         CmdBuilder(user, "FIDENT").push(ident).Broadcast();
 562 }
 563
 564 void ModuleSpanningTree::OnUserPart(Membership* memb, std::string &partmessage, CUList& excepts)
 565 {
 566         if (IS_LOCAL(memb->user))
 567         {
 568                 CmdBuilder params(memb->user, "PART");
 569                 params.push_back(memb->chan->name);
 570                 if (!partmessage.empty())
 571                         params.push_last(partmessage);
 572                 params.Broadcast();
 573         }
 574 }
 575
 576 void ModuleSpanningTree::OnUserQuit(User* user, const std::string &reason, const std::string &oper_message)
 577 {
 578         if (IS_LOCAL(user))
 579         {
 580                 if (oper_message != reason)
 581                         ServerInstance->PI->SendMetaData(user, "operquit", oper_message);
 582
 583                 CmdBuilder(user, "QUIT").push_last(reason).Broadcast();
 584         }
 585         else
 586         {
 587                 // Hide the message if one of the following is true:
 588                 // - User is being quit due to a netsplit and quietbursts is on
 589                 // - Server is a silent uline
 590                 bool hide = (((this->SplitInProgress) && (Utils->quiet_bursts)) || (user->server->IsSilentULine()));
 591                 if (!hide)
 592                 {
 593                         ServerInstance->SNO->WriteToSnoMask('Q', "Client exiting on server %s: %s (%s) [%s]",
 594                                 user->server->GetName().c_str(), user->GetFullRealHost().c_str(), user->GetIPString().c_str(), oper_message.c_str());
 595                 }
 596         }
 597
 598         // Regardless, We need to modify the user Counts..
 599         TreeServer::Get(user)->UserCount--;
 600 }
 601
 602 void ModuleSpanningTree::OnUserPostNick(User* user, const std::string &oldnick)
 603 {
 604         if (IS_LOCAL(user))
 605         {
 606                 // The nick TS is updated by the core, we don't do it
 607                 CmdBuilder params(user, "NICK");
 608                 params.push_back(user->nick);
 609                 params.push_back(ConvToStr(user->age));
 610                 params.Broadcast();
 611         }
 612         else if (!loopCall && user->nick == user->uuid)
 613         {
 614                 CmdBuilder params("SAVE");
 615                 params.push_back(user->uuid);
 616                 params.push_back(ConvToStr(user->age));
 617                 params.Broadcast();
 618         }
 619 }
 620
 621 void ModuleSpanningTree::OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& excepts)
 622 {
 623         if ((!IS_LOCAL(source)) && (source != ServerInstance->FakeClient))
 624                 return;
 625
 626         CmdBuilder params(source, "KICK");
 627         params.push_back(memb->chan->name);
 628         params.push_back(memb->user->uuid);
 629         // If a remote user is being kicked by us then send the membership id in the kick too
 630         if (!IS_LOCAL(memb->user))
 631                 params.push_int(memb->id);
 632         params.push_last(reason);
 633         params.Broadcast();
 634 }
 635
 636 void ModuleSpanningTree::OnPreRehash(User* user, const std::string &parameter)
 637 {
 638         if (loopCall)
 639                 return; // Don't generate a REHASH here if we're in the middle of processing a message that generated this one
 640
 641         ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "OnPreRehash called with param %s", parameter.c_str());
 642
 643         // Send out to other servers
 644         if (!parameter.empty() && parameter[0] != '-')
 645         {
 646                 CmdBuilder params((user ? user->uuid : ServerInstance->Config->GetSID()), "REHASH");
 647                 params.push_back(parameter);
 648                 params.Forward(user ? TreeServer::Get(user)->GetRoute() : NULL);
 649         }
 650 }
 651
 652 void ModuleSpanningTree::ReadConfig(ConfigStatus& status)
 653 {
 654         // Did this rehash change the description of this server?
 655         const std::string& newdesc = ServerInstance->Config->ServerDesc;
 656         if (newdesc != Utils->TreeRoot->GetDesc())
 657         {
 658                 // Broadcast a SINFO desc message to let the network know about the new description. This is the description
 659                 // string that is sent in the SERVER message initially and shown for example in WHOIS.
 660                 // We don't need to update the field itself in the Server object - the core does that.
 661                 CommandSInfo::Builder(Utils->TreeRoot, "desc", newdesc).Broadcast();
 662         }
 663
 664         // Re-read config stuff
 665         try
 666         {
 667                 Utils->ReadConfiguration();
 668         }
 669         catch (ModuleException& e)
 670         {
 671                 // Refresh the IP cache anyway, so servers read before the error will be allowed to connect
 672                 Utils->RefreshIPCache();
 673                 // Always warn local opers with snomask +l, also warn globally (snomask +L) if the rehash was issued by a remote user
 674                 std::string msg = "Error in configuration: ";
 675                 msg.append(e.GetReason());
 676                 ServerInstance->SNO->WriteToSnoMask('l', msg);
 677                 if (status.srcuser && !IS_LOCAL(status.srcuser))
 678                         ServerInstance->PI->SendSNONotice('L', msg);
 679         }
 680 }
 681
 682 void ModuleSpanningTree::OnLoadModule(Module* mod)
 683 {
 684         std::string data;
 685         data.push_back('+');
 686         data.append(mod->ModuleSourceFile);
 687         Version v = mod->GetVersion();
 688         if (!v.link_data.empty())
 689         {
 690                 data.push_back('=');
 691                 data.append(v.link_data);
 692         }
 693         ServerInstance->PI->SendMetaData("modules", data);
 694 }
 695
 696 void ModuleSpanningTree::OnUnloadModule(Module* mod)
 697 {
 698         if (!Utils)
 699                 return;
 700         ServerInstance->PI->SendMetaData("modules", "-" + mod->ModuleSourceFile);
 701
 702         // Close all connections which use an IO hook provided by this module
 703         const TreeServer::ChildServers& list = Utils->TreeRoot->GetChildren();
 704         for (TreeServer::ChildServers::const_iterator i = list.begin(); i != list.end(); ++i)
 705         {
 706                 TreeSocket* sock = (*i)->GetSocket();
 707                 if (sock->GetIOHook() && sock->GetIOHook()->prov->creator == mod)
 708                 {
 709                         sock->SendError("SSL module unloaded");
 710                         sock->Close();
 711                 }
 712         }
 713
 714         for (SpanningTreeUtilities::TimeoutList::const_iterator i = Utils->timeoutlist.begin(); i != Utils->timeoutlist.end(); ++i)
 715         {
 716                 TreeSocket* sock = i->first;
 717                 if (sock->GetIOHook() && sock->GetIOHook()->prov->creator == mod)
 718                         sock->Close();
 719         }
 720 }
 721
 722 // note: the protocol does not allow direct umode +o except
 723 // via NICK with 8 params. sending OPERTYPE infers +o modechange
 724 // locally.
 725 void ModuleSpanningTree::OnOper(User* user, const std::string &opertype)
 726 {
 727         if (user->registered != REG_ALL || !IS_LOCAL(user))
 728                 return;
 729         CommandOpertype::Builder(user).Broadcast();
 730 }
 731
 732 void ModuleSpanningTree::OnAddLine(User* user, XLine *x)
 733 {
 734         if (!x->IsBurstable() || loopCall || (user && !IS_LOCAL(user)))
 735                 return;
 736
 737         if (!user)
 738                 user = ServerInstance->FakeClient;
 739
 740         CommandAddLine::Builder(x, user).Broadcast();
 741 }
 742
 743 void ModuleSpanningTree::OnDelLine(User* user, XLine *x)
 744 {
 745         if (!x->IsBurstable() || loopCall || (user && !IS_LOCAL(user)))
 746                 return;
 747
 748         if (!user)
 749                 user = ServerInstance->FakeClient;
 750
 751         CmdBuilder params(user, "DELLINE");
 752         params.push_back(x->type);
 753         params.push_back(x->Displayable());
 754         params.Broadcast();
 755 }
 756
 757 ModResult ModuleSpanningTree::OnSetAway(User* user, const std::string &awaymsg)
 758 {
 759         if (IS_LOCAL(user))
 760                 CommandAway::Builder(user, awaymsg).Broadcast();
 761
 762         return MOD_RES_PASSTHRU;
 763 }
 764
 765 CullResult ModuleSpanningTree::cull()
 766 {
 767         if (Utils)
 768                 Utils->cull();
 769         return this->Module::cull();
 770 }
 771
 772 ModuleSpanningTree::~ModuleSpanningTree()
 773 {
 774         ServerInstance->PI = &ServerInstance->DefaultProtocolInterface;
 775
 776         Server* newsrv = new Server(ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
 777         SetLocalUsersServer(newsrv);
 778
 779         /* This will also free the listeners */
 780         delete Utils;
 781
 782         delete commands;
 783 }
 784
 785 Version ModuleSpanningTree::GetVersion()
 786 {
 787         return Version("Allows servers to be linked", VF_VENDOR);
 788 }
 789
 790 /* It is IMPORTANT that m_spanningtree is the last module in the chain
 791  * so that any activity it sees is FINAL, e.g. we arent going to send out
 792  * a NICK message before m_cloaking has finished putting the +x on the user,
 793  * etc etc.
 794  * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
 795  * the module call queue.
 796  */
 797 void ModuleSpanningTree::Prioritize()
 798 {
 799         ServerInstance->Modules->SetPriority(this, PRIORITY_LAST);
 800 }
 801
 802 MODULE_INIT(ModuleSpanningTree)