src/modules/m_spanningtree/treesocket1.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "configreader.h"
  15 #include "users.h"
  16 #include "channels.h"
  17 #include "modules.h"
  18 #include "commands/cmd_whois.h"
  19 #include "commands/cmd_stats.h"
  20 #include "socket.h"
  21 #include "inspircd.h"
  22 #include "wildcard.h"
  23 #include "xline.h"
  24 #include "transport.h"
  25 #include "socketengine.h"
  26
  27 #include "m_spanningtree/main.h"
  28 #include "m_spanningtree/utils.h"
  29 #include "m_spanningtree/treeserver.h"
  30 #include "m_spanningtree/link.h"
  31 #include "m_spanningtree/treesocket.h"
  32 #include "m_spanningtree/resolvers.h"
  33 #include "m_spanningtree/handshaketimer.h"
  34
  35 /* $ModDep: m_spanningtree/timesynctimer.h m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h */
  36
  37 /** Because most of the I/O gubbins are encapsulated within
  38  * InspSocket, we just call the superclass constructor for
  39  * most of the action, and append a few of our own values
  40  * to it.
  41  */
  42 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod)
  43         : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
  44 {
  45         myhost = host;
  46         this->LinkState = LISTENER;
  47         if (listening && Hook)
  48                 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
  49 }
  50
  51 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, const std::string &ServerName, const std::string &bindto, Module* HookMod)
  52         : InspSocket(SI, host, port, listening, maxtime, bindto), Utils(Util), Hook(HookMod)
  53 {
  54         myhost = ServerName;
  55         this->LinkState = CONNECTING;
  56         if (Hook)
  57                 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
  58 }
  59
  60 /** When a listening socket gives us a new file descriptor,
  61  * we must associate it with a socket without creating a new
  62  * connection. This constructor is used for this purpose.
  63  */
  64 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod)
  65         : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
  66 {
  67         this->LinkState = WAIT_AUTH_1;
  68         /* If we have a transport module hooked to the parent, hook the same module to this
  69          * socket, and set a timer waiting for handshake before we send CAPAB etc.
  70          */
  71         if (Hook)
  72         {
  73                 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
  74                 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils));
  75         }
  76         else
  77         {
  78                 /* Otherwise, theres no lower layer transport in plain TCP/IP,
  79                  * so just send the capabilities right now.
  80                  */
  81                 this->SendCapabilities();
  82         }
  83 }
  84
  85 ServerState TreeSocket::GetLinkState()
  86 {
  87         return this->LinkState;
  88 }
  89
  90 Module* TreeSocket::GetHook()
  91 {
  92         return this->Hook;
  93 }
  94
  95 TreeSocket::~TreeSocket()
  96 {
  97         if (Hook)
  98                 InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
  99 }
 100
 101 /** When an outbound connection finishes connecting, we receive
 102  * this event, and must send our SERVER string to the other
 103  * side. If the other side is happy, as outlined in the server
 104  * to server docs on the inspircd.org site, the other side
 105  * will then send back its own server string.
 106  */
 107 bool TreeSocket::OnConnected()
 108 {
 109         if (this->LinkState == CONNECTING)
 110         {
 111                 /* we do not need to change state here. */
 112                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 113                 {
 114                         if (x->Name == this->myhost)
 115                         {
 116                                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 117                                 if (Hook)
 118                                 {
 119                                         InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 120                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2");
 121                                 }
 122                                 else
 123                                         this->SendCapabilities();
 124                                 /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 125                                 if (Hook)
 126                                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils));
 127                                 else
 128                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 129                                 return true;
 130                         }
 131                 }
 132         }
 133         /* There is a (remote) chance that between the /CONNECT and the connection
 134          * being accepted, some muppet has removed the <link> block and rehashed.
 135          * If that happens the connection hangs here until it's closed. Unlikely
 136          * and rather harmless.
 137          */
 138         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 139         return true;
 140 }
 141
 142 void TreeSocket::OnError(InspSocketError e)
 143 {
 144         /* We don't handle this method, because all our
 145          * dirty work is done in OnClose() (see below)
 146          * which is still called on error conditions too.
 147          */
 148         if (e == I_ERR_CONNECT)
 149         {
 150                 this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 151                 Link* MyLink = Utils->FindLink(myhost);
 152                 if (MyLink)
 153                         Utils->DoFailOver(MyLink);
 154         }
 155 }
 156
 157 int TreeSocket::OnDisconnect()
 158 {
 159         /* For the same reason as above, we don't
 160          * handle OnDisconnect()
 161          */
 162         return true;
 163 }
 164
 165 /** Recursively send the server tree with distances as hops.
 166  * This is used during network burst to inform the other server
 167  * (and any of ITS servers too) of what servers we know about.
 168  * If at any point any of these servers already exist on the other
 169  * end, our connection may be terminated. The hopcounts given
 170  * by this function are relative, this doesn't matter so long as
 171  * they are all >1, as all the remote servers re-calculate them
 172  * to be relative too, with themselves as hop 0.
 173  */
 174 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
 175 {
 176         char command[1024];
 177         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 178         {
 179                 TreeServer* recursive_server = Current->GetChild(q);
 180                 if (recursive_server != s)
 181                 {
 182                         snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 183                         this->WriteLine(command);
 184                         this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 185                         /* down to next level */
 186                         this->SendServers(recursive_server, s, hops+1);
 187                 }
 188         }
 189 }
 190
 191 std::string TreeSocket::MyCapabilities()
 192 {
 193         std::vector<std::string> modlist;
 194         std::string capabilities = "";
 195         for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 196         {
 197                 if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 198                         modlist.push_back(this->Instance->Config->module_names[i]);
 199         }
 200         sort(modlist.begin(),modlist.end());
 201         for (unsigned int i = 0; i < modlist.size(); i++)
 202         {
 203                 if (i)
 204                         capabilities = capabilities + ",";
 205                 capabilities = capabilities + modlist[i];
 206         }
 207         return capabilities;
 208 }
 209
 210 void TreeSocket::SendCapabilities()
 211 {
 212         irc::commasepstream modulelist(MyCapabilities());
 213         this->WriteLine("CAPAB START");
 214
 215         /* Send module names, split at 509 length */
 216         std::string item = "*";
 217         std::string line = "CAPAB MODULES ";
 218         while ((item = modulelist.GetToken()) != "")
 219         {
 220                 if (line.length() + item.length() + 1 > 509)
 221                 {
 222                         this->WriteLine(line);
 223                         line = "CAPAB MODULES ";
 224                 }
 225
 226                 if (line != "CAPAB MODULES ")
 227                         line.append(",");
 228
 229                 line.append(item);
 230         }
 231         if (line != "CAPAB MODULES ")
 232                 this->WriteLine(line);
 233
 234         int ip6 = 0;
 235         int ip6support = 0;
 236 #ifdef IPV6
 237         ip6 = 1;
 238 #endif
 239 #ifdef SUPPORT_IP6LINKS
 240         ip6support = 1;
 241 #endif
 242         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)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 243
 244         this->WriteLine("CAPAB END");
 245 }
 246
 247 /* Check a comma seperated list for an item */
 248 bool TreeSocket::HasItem(const std::string &list, const std::string &item)
 249 {
 250         irc::commasepstream seplist(list);
 251         std::string item2 = "*";
 252         while ((item2 = seplist.GetToken()) != "")
 253         {
 254                 if (item2 == item)
 255                         return true;
 256         }
 257         return false;
 258 }
 259
 260 /* Isolate and return the elements that are different between two comma seperated lists */
 261 std::string TreeSocket::ListDifference(const std::string &one, const std::string &two)
 262 {
 263         irc::commasepstream list_one(one);
 264         std::string item = "*";
 265         std::string result = "";
 266         while ((item = list_one.GetToken()) != "")
 267         {
 268                 if (!HasItem(two, item))
 269                 {
 270                         result.append(" ");
 271                         result.append(item);
 272                 }
 273         }
 274         return result;
 275 }
 276
 277 bool TreeSocket::Capab(const std::deque<std::string> &params)
 278 {
 279         if (params.size() < 1)
 280         {
 281                 this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 282                 return false;
 283         }
 284         if (params[0] == "START")
 285         {
 286                 this->ModuleList = "";
 287                 this->CapKeys.clear();
 288         }
 289         else if (params[0] == "END")
 290         {
 291                 std::string reason = "";
 292                 int ip6support = 0;
 293 #ifdef SUPPORT_IP6LINKS
 294                 ip6support = 1;
 295 #endif
 296                 /* Compare ModuleList and check CapKeys...
 297                  * Maybe this could be tidier? -- Brain
 298                  */
 299                 if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 300                 {
 301                         std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 302                         if (!diff.length())
 303                         {
 304                                 diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 305                         }
 306                         else
 307                         {
 308                                 diff = "this server:" + diff;
 309                         }
 310                         if (diff.length() == 12)
 311                                 reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 312                         else
 313                                 reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 314                 }
 315                 if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 316                         reason = "We don't both support linking to IPV6 servers";
 317                 if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 318                         reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 319                 if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 320                         reason = "Maximum nickname lengths differ or remote nickname length not specified";
 321                 if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 322                 {
 323                         if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 324                         {
 325                                 reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 326                         }
 327                         else
 328                         {
 329                                 reason = "Protocol version not specified";
 330                         }
 331                 }
 332                 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))))
 333                         reason = "We don't both have halfop support enabled/disabled identically";
 334                 if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 335                         reason = "Maximum ident lengths differ or remote ident length not specified";
 336                 if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 337                         reason = "Maximum channel lengths differ or remote channel length not specified";
 338                 if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 339                         reason = "Maximum modes per line differ or remote modes per line not specified";
 340                 if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 341                         reason = "Maximum quit lengths differ or remote quit length not specified";
 342                 if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 343                         reason = "Maximum topic lengths differ or remote topic length not specified";
 344                 if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 345                         reason = "Maximum kick lengths differ or remote kick length not specified";
 346                 if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 347                         reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 348                 if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 349                         reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 350                 if (reason.length())
 351                 {
 352                         this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 353                         return false;
 354                 }
 355         }
 356         else if ((params[0] == "MODULES") && (params.size() == 2))
 357         {
 358                 if (!this->ModuleList.length())
 359                 {
 360                         this->ModuleList.append(params[1]);
 361                 }
 362                 else
 363                 {
 364                         this->ModuleList.append(",");
 365                         this->ModuleList.append(params[1]);
 366                 }
 367         }
 368
 369         else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
 370         {
 371                 irc::tokenstream capabs(params[1]);
 372                 std::string item;
 373                 bool more = true;
 374                 while ((more = capabs.GetToken(item)))
 375                 {
 376                         /* Process each key/value pair */
 377                         std::string::size_type equals = item.rfind('=');
 378                         if (equals != std::string::npos)
 379                         {
 380                                 std::string var = item.substr(0, equals);
 381                                 std::string value = item.substr(equals+1, item.length());
 382                                 CapKeys[var] = value;
 383                         }
 384                 }
 385         }
 386         return true;
 387 }
 388
 389 /** This function forces this server to quit, removing this server
 390  * and any users on it (and servers and users below that, etc etc).
 391  * It's very slow and pretty clunky, but luckily unless your network
 392  * is having a REAL bad hair day, this function shouldnt be called
 393  * too many times a month ;-)
 394  */
 395 void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
 396 {
 397         /* recursively squit the servers attached to 'Current'.
 398          * We're going backwards so we don't remove users
 399          * while we still need them ;)
 400          */
 401         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 402         {
 403                 TreeServer* recursive_server = Current->GetChild(q);
 404                 this->SquitServer(from,recursive_server);
 405         }
 406         /* Now we've whacked the kids, whack self */
 407         num_lost_servers++;
 408         num_lost_users += Current->QuitUsers(from);
 409 }
 410
 411 /** This is a wrapper function for SquitServer above, which
 412  * does some validation first and passes on the SQUIT to all
 413  * other remaining servers.
 414  */
 415 void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
 416 {
 417         if ((Current) && (Current != Utils->TreeRoot))
 418         {
 419                 Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
 420                 rmode.Send(Instance);
 421
 422                 std::deque<std::string> params;
 423                 params.push_back(Current->GetName());
 424                 params.push_back(":"+reason);
 425                 Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 426                 if (Current->GetParent() == Utils->TreeRoot)
 427                 {
 428                         this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 429                 }
 430                 else
 431                 {
 432                         this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 433                 }
 434                 num_lost_servers = 0;
 435                 num_lost_users = 0;
 436                 std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
 437                 SquitServer(from, Current);
 438                 Current->Tidy();
 439                 Current->GetParent()->DelChild(Current);
 440                 DELETE(Current);
 441                 this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 442         }
 443         else
 444         {
 445                 Instance->Log(DEFAULT,"Squit from unknown server");
 446         }
 447 }
 448
 449 /** FMODE command - server mode with timestamp checks */
 450 bool TreeSocket::ForceMode(const std::string &source, std::deque<std::string> &params)
 451 {
 452         /* Chances are this is a 1.0 FMODE without TS */
 453         if (params.size() < 3)
 454         {
 455                 /* No modes were in the command, probably a channel with no modes set on it */
 456                 return true;
 457         }
 458
 459         bool smode = false;
 460         std::string sourceserv;
 461         /* Are we dealing with an FMODE from a user, or from a server? */
 462         userrec* who = this->Instance->FindNick(source);
 463         if (who)
 464         {
 465                 /* FMODE from a user, set sourceserv to the users server name */
 466                 sourceserv = who->server;
 467         }
 468         else
 469         {
 470                 /* FMODE from a server, create a fake user to receive mode feedback */
 471                 who = new userrec(this->Instance);
 472                 who->SetFd(FD_MAGIC_NUMBER);
 473                 smode = true;      /* Setting this flag tells us we should free the userrec later */
 474                 sourceserv = source;    /* Set sourceserv to the actual source string */
 475         }
 476         const char* modelist[64];
 477         time_t TS = 0;
 478         int n = 0;
 479         memset(&modelist,0,sizeof(modelist));
 480         for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
 481         {
 482                 if (q == 1)
 483                 {
 484                         /* The timestamp is in this position.
 485                          * We don't want to pass that up to the
 486                          * server->client protocol!
 487                          */
 488                         TS = atoi(params[q].c_str());
 489                 }
 490                 else
 491                 {
 492                         /* Everything else is fine to append to the modelist */
 493                         modelist[n++] = params[q].c_str();
 494                 }
 495
 496         }
 497         /* Extract the TS value of the object, either userrec or chanrec */
 498         userrec* dst = this->Instance->FindNick(params[0]);
 499         chanrec* chan = NULL;
 500         time_t ourTS = 0;
 501         if (dst)
 502         {
 503                 ourTS = dst->age;
 504         }
 505         else
 506         {
 507                 chan = this->Instance->FindChan(params[0]);
 508                 if (chan)
 509                 {
 510                         ourTS = chan->age;
 511                 }
 512                 else
 513                         /* Oops, channel doesnt exist! */
 514                         return true;
 515         }
 516
 517         /* TS is equal or less: Merge the mode changes into ours and pass on.
 518          */
 519         if (TS <= ourTS)
 520         {
 521                 if (smode)
 522                 {
 523                         this->Instance->SendMode(modelist, n, who);
 524                 }
 525                 else
 526                 {
 527                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
 528                 }
 529                 /* HOT POTATO! PASS IT ON! */
 530                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
 531         }
 532         /* If the TS is greater than ours, we drop the mode and dont pass it anywhere.
 533          */
 534
 535         if (smode)
 536                 DELETE(who);
 537
 538         return true;
 539 }
 540
 541 /** FTOPIC command */
 542 bool TreeSocket::ForceTopic(const std::string &source, std::deque<std::string> &params)
 543 {
 544         if (params.size() != 4)
 545                 return true;
 546         time_t ts = atoi(params[1].c_str());
 547         std::string nsource = source;
 548         chanrec* c = this->Instance->FindChan(params[0]);
 549         if (c)
 550         {
 551                 if ((ts >= c->topicset) || (!*c->topic))
 552                 {
 553                         std::string oldtopic = c->topic;
 554                         strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
 555                         strlcpy(c->setby,params[2].c_str(),127);
 556                         c->topicset = ts;
 557                         /* if the topic text is the same as the current topic,
 558                          * dont bother to send the TOPIC command out, just silently
 559                          * update the set time and set nick.
 560                          */
 561                         if (oldtopic != params[3])
 562                         {
 563                                 userrec* user = this->Instance->FindNick(source);
 564                                 if (!user)
 565                                 {
 566                                         c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
 567                                 }
 568                                 else
 569                                 {
 570                                         c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
 571                                         nsource = user->server;
 572                                 }
 573                                 /* all done, send it on its way */
 574                                 params[3] = ":" + params[3];
 575                                 Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
 576                         }
 577                 }
 578
 579         }
 580         return true;
 581 }
 582
 583 /** FJOIN, similar to TS6 SJOIN, but not quite. */
 584 bool TreeSocket::ForceJoin(const std::string &source, std::deque<std::string> &params)
 585 {
 586         /* 1.1 FJOIN works as follows:
 587          *
 588          * Each FJOIN is sent along with a timestamp, and the side with the lowest
 589          * timestamp 'wins'. From this point on we will refer to this side as the
 590          * winner. The side with the higher timestamp loses, from this point on we
 591          * will call this side the loser or losing side. This should be familiar to
 592          * anyone who's dealt with dreamforge or TS6 before.
 593          *
 594          * When two sides of a split heal and this occurs, the following things
 595          * will happen:
 596          *
 597          * If the timestamps are exactly equal, both sides merge their privilages
 598          * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
 599          * re-created during a split, this is safe to do.
 600          *
 601          *
 602          * If the timestamps are NOT equal, the losing side removes all privilage
 603          * modes from all of its users that currently exist in the channel, before
 604          * introducing new users into the channel which are listed in the FJOIN
 605          * command's parameters. This means, all modes +ohv, and privilages added
 606          * by modules, such as +qa. The losing side then LOWERS its timestamp value
 607          * of the channel to match that of the winning side, and the modes of the
 608          * users of the winning side are merged in with the losing side. The loser
 609          * then sends out a set of FMODE commands which 'confirm' that it just
 610          * removed all privilage modes from its existing users, which allows for
 611          * services packages to still work correctly without needing to know the
 612          * timestamping rules which InspIRCd follows. In TS6 servers this is always
 613          * a problem, and services packages must contain code which explicitly
 614          * behaves as TS6 does, removing ops from the losing side of a split where
 615          * neccessary within its internal records, as this state information is
 616          * not explicitly echoed out in that protocol.
 617          *
 618          * The winning side on the other hand will ignore all user modes from the
 619          * losing side, so only its own modes get applied. Life is simple for those
 620          * who succeed at internets. :-)
 621          *
 622          * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
 623          * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
 624          * you ask? Well, quite simply because we don't need to. They'll be sent
 625          * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
 626          * the losing side sends any modes for the channel which shouldnt win,
 627          * they wont as their timestamp will be too high :-)
 628          */
 629
 630         if (params.size() < 3)
 631                 return true;
 632
 633         char first[MAXBUF];          /* The first parameter of the mode command */
 634         char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
 635         char* mode_users[127];    /* The values used by the mode command */
 636         memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
 637         mode_users[0] = first;    /* Set this up to be our on-stack value */
 638         mode_users[1] = modestring;     /* Same here as above */
 639         strcpy(modestring,"+");  /* Initialize the mode sequence to just '+' */
 640         unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
 641
 642         userrec* who = NULL;                /* User we are currently checking */
 643         std::string channel = params[0];        /* Channel name, as a string */
 644         time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
 645         std::string nicklist = params[2];
 646         bool created = false;
 647
 648         /* Try and find the channel */
 649         chanrec* chan = this->Instance->FindChan(channel);
 650
 651         /* Initialize channel name in the mode parameters */
 652         strlcpy(mode_users[0],channel.c_str(),MAXBUF);
 653
 654         /* default TS is a high value, which if we dont have this
 655          * channel will let the other side apply their modes.
 656          */
 657         time_t ourTS = Instance->Time(true)+600;
 658         /* Does this channel exist? if it does, get its REAL timestamp */
 659         if (chan)
 660                 ourTS = chan->age;
 661         else
 662                 created = true; /* don't perform deops, and set TS to correct time after processing. */
 663
 664         /* do this first, so our mode reversals are correctly received by other servers
 665          * if there is a TS collision.
 666          */
 667         params[2] = ":" + params[2];
 668         Utils->DoOneToAllButSender(source,"FJOIN",params,source);
 669
 670         /* In 1.1, if they have the newer channel, we immediately clear
 671          * all status modes from our users. We then accept their modes.
 672          * If WE have the newer channel its the other side's job to do this.
 673          * Note that this causes the losing server to send out confirming
 674          * FMODE lines.
 675          */
 676         if (ourTS > TS)
 677         {
 678                 std::deque<std::string> param_list;
 679                 /* Lower the TS here */
 680                 if (Utils->AnnounceTSChange && chan)
 681                         chan->WriteChannelWithServ(Instance->Config->ServerName,
 682                         "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
 683                 ourTS = TS;
 684                 /* Zap all the privilage modes on our side, if the channel exists here */
 685                 if (!created)
 686                 {
 687                         param_list.push_back(channel);
 688                         /* Do this first! */
 689                         chan->age = TS;
 690                         this->RemoveStatus(Instance->Config->ServerName, param_list);
 691                 }
 692         }
 693         /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
 694         irc::tokenstream users(nicklist);
 695         std::string item;
 696
 697         /* Now, process every 'prefixes,nick' pair */
 698         while (users.GetToken(item))
 699         {
 700                 /* Find next user */
 701                 const char* usr = item.c_str();
 702                 /* Safety check just to make sure someones not sent us an FJOIN full of spaces
 703                  * (is this even possible?) */
 704                 if (usr && *usr)
 705                 {
 706                         const char* permissions = usr;
 707                         int ntimes = 0;
 708                         char* nm = new char[MAXBUF];
 709                         char* tnm = nm;
 710                         /* Iterate through all the prefix values, convert them from prefixes
 711                          * to mode letters, and append them to the mode sequence
 712                          */
 713                         while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
 714                         {
 715                                 ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
 716                                 if (mh)
 717                                 {
 718                                         /* This is a valid prefix */
 719                                         ntimes++;
 720                                         *tnm++ = mh->GetModeChar();
 721                                 }
 722                                 else
 723                                 {
 724                                         /* Not a valid prefix...
 725                                          * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
 726                                          */
 727                                         this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
 728                                         this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
 729                                         return false;
 730                                 }
 731                                 usr++;
 732                                 permissions++;
 733                         }
 734                         /* Null terminate modes */
 735                         *tnm = 0;
 736                         /* Advance past the comma, to the nick */
 737                         usr++;
 738                         /* Check the user actually exists */
 739                         who = this->Instance->FindNick(usr);
 740                         if (who)
 741                         {
 742                                 /* Check that the user's 'direction' is correct
 743                                  * based on the server sending the FJOIN. We must
 744                                  * check each nickname in turn, because the origin of
 745                                  * the FJOIN may be different to the origin of the nicks
 746                                  * in the command itself.
 747                                  */
 748                                 TreeServer* route_back_again = Utils->BestRouteTo(who->server);
 749                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
 750                                 {
 751                                         /* Oh dear oh dear. */
 752                                         delete[] nm;
 753                                         continue;
 754                                 }
 755
 756                                 /* NOTE: Moved this below the fake direction check, so that modes
 757                                  * arent put into the mode list for users that were collided, and
 758                                  * may reconnect from the other side or our side before the split
 759                                  * is completed!
 760                                  */
 761
 762                                 /* Did they get any modes? How many times? */
 763                                 strlcat(modestring, nm, MAXBUF);
 764                                 for (int k = 0; k < ntimes; k++)
 765                                         mode_users[modectr++] = strdup(usr);
 766                                 /* Free temporary buffer used for mode sequence */
 767                                 delete[] nm;
 768
 769                                 /* Finally, we can actually place the user into the channel.
 770                                  * We're sure its right. Final answer, phone a friend.
 771                                  */
 772                                 if (created)
 773                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "", TS);
 774                                 else
 775                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
 776                                 /* Have we already queued up MAXMODES modes with parameters
 777                                  * (+qaohv) ready to be sent to the server?
 778                                  */
 779                                 if (modectr >= (MAXMODES-1))
 780                                 {
 781                                         /* Only actually give the users any status if we lost
 782                                          * the FJOIN or drew (equal timestamps).
 783                                          * It isn't actually possible for ourTS to be > TS here,
 784                                          * only possible to actually have ourTS == TS, or
 785                                          * ourTS < TS, because if we lost, we already lowered
 786                                          * our TS above before we entered this loop. We only
 787                                          * check >= as a safety measure, in case someone stuffed
 788                                          * up. If someone DID stuff up, it was most likely me.
 789                                          * Note: I do not like baseball bats in the face...
 790                                          */
 791                                         if (ourTS >= TS)
 792                                         {
 793                                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
 794
 795                                                 /* Something stuffed up, and for some reason, the timestamp is
 796                                                  * NOT lowered right now and should be. Lower it. Usually this
 797                                                  * code won't be executed, doubtless someone will remove it some
 798                                                  * day soon.
 799                                                  */
 800                                                 if (ourTS > TS)
 801                                                 {
 802                                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
 803                                                         chan->age = TS;
 804                                                         ourTS = TS;
 805                                                 }
 806                                         }
 807
 808                                         /* Reset all this back to defaults, and
 809                                          * free any ram we have left allocated.
 810                                          */
 811                                         strcpy(mode_users[1],"+");
 812                                         for (unsigned int f = 2; f < modectr; f++)
 813                                                 free(mode_users[f]);
 814                                         modectr = 2;
 815                                 }
 816                         }
 817                         else
 818                         {
 819                                 /* Remember to free this */
 820                                 delete[] nm;
 821                                 /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
 822                                  * We don't try to process the nickname here (that WOULD cause a segfault because
 823                                  * we'd be playing with null pointers) however, we DO pass the nickname on, just
 824                                  * in case somehow we're desynched, so that other users which might be able to see
 825                                  * the nickname get their fair chance to process it.
 826                                  */
 827                                 Instance->Log(SPARSE,"Warning! Invalid user %s in FJOIN to channel %s IGNORED", usr, channel.c_str());
 828                                 continue;
 829                         }
 830                 }
 831         }
 832
 833         /* there werent enough modes built up to flush it during FJOIN,
 834          * or, there are a number left over. flush them out.
 835          */
 836         if ((modectr > 2) && (who) && (chan))
 837         {
 838                 if (ourTS >= TS)
 839                 {
 840                         /* Our channel is newer than theirs. Evil deeds must be afoot. */
 841                         this->Instance->SendMode((const char**)mode_users,modectr,who);
 842                         /* Yet again, we can't actually get a true value here, if everything else
 843                          * is working as it should.
 844                          */
 845                         if (ourTS > TS)
 846                         {
 847                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
 848                                 chan->age = TS;
 849                                 ourTS = TS;
 850                         }
 851                 }
 852
 853                 /* Free anything we have left to free */
 854                 for (unsigned int f = 2; f < modectr; f++)
 855                         free(mode_users[f]);
 856         }
 857         /* All done. That wasnt so bad was it, you can wipe
 858          * the sweat from your forehead now. :-)
 859          */
 860         return true;
 861 }
 862
 863 /** NICK command */
 864 bool TreeSocket::IntroduceClient(const std::string &source, std::deque<std::string> &params)
 865 {
 866         /** Do we have enough parameters:
 867          * NICK age nick host dhost ident +modes ip :gecos
 868          */
 869         if (params.size() != 8)
 870         {
 871                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
 872                 return true;
 873         }
 874
 875         time_t age = atoi(params[0].c_str());
 876         const char* tempnick = params[1].c_str();
 877
 878         /** Check parameters for validity before introducing the client, discovered by dmb.
 879          * XXX: Can we make this neater?
 880          */
 881         if (!age)
 882         {
 883                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction (Invalid TS?)");
 884                 return true;
 885         }
 886         else if (params[1].length() > NICKMAX)
 887         {
 888                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+" > NICKMAX?)");
 889                 return true;
 890         }
 891         else if (params[2].length() > 64)
 892         {
 893                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[2]+" > 64?)");
 894                 return true;
 895         }
 896         else if (params[3].length() > 64)
 897         {
 898                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[3]+" > 64?)");
 899                 return true;
 900         }
 901         else if (params[4].length() > IDENTMAX)
 902         {
 903                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[4]+" > IDENTMAX?)");
 904                 return true;
 905         }
 906         else if (params[7].length() > MAXGECOS)
 907         {
 908                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[7]+" > MAXGECOS?)");
 909                 return true;
 910         }
 911
 912         /** Our client looks ok, lets introduce it now
 913          */
 914         Instance->Log(DEBUG,"New remote client %s",tempnick);
 915         user_hash::iterator iter = this->Instance->clientlist->find(tempnick);
 916
 917         if (iter != this->Instance->clientlist->end())
 918         {
 919                 /* nick collision */
 920                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
 921                 userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
 922                 return true;
 923         }
 924
 925         userrec* _new = new userrec(this->Instance);
 926         (*(this->Instance->clientlist))[tempnick] = _new;
 927         _new->SetFd(FD_MAGIC_NUMBER);
 928         strlcpy(_new->nick, tempnick,NICKMAX-1);
 929         strlcpy(_new->host, params[2].c_str(),63);
 930         strlcpy(_new->dhost, params[3].c_str(),63);
 931         _new->server = this->Instance->FindServerNamePtr(source.c_str());
 932         strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
 933         strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
 934         _new->registered = REG_ALL;
 935         _new->signon = age;
 936
 937         /* we need to remove the + from the modestring, so we can do our stuff */
 938         std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
 939         if (pos_after_plus != std::string::npos)
 940         params[5] = params[5].substr(pos_after_plus);
 941
 942         for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
 943         {
 944                 _new->modes[(*v)-65] = 1;
 945                 /* For each mode thats set, increase counter */
 946                 ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER);
 947                 if (mh)
 948                         mh->ChangeCount(1);
 949         }
 950
 951         /* now we've done with modes processing, put the + back for remote servers */
 952         params[5] = "+" + params[5];
 953
 954 #ifdef SUPPORT_IP6LINKS
 955         if (params[6].find_first_of(":") != std::string::npos)
 956                 _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
 957         else
 958 #endif
 959                 _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
 960
 961         Instance->AddGlobalClone(_new);
 962
 963         if (!this->Instance->SilentULine(_new->server))
 964                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
 965
 966         params[7] = ":" + params[7];
 967         Utils->DoOneToAllButSender(source,"NICK", params, source);
 968
 969         // Increment the Source Servers User Count..
 970         TreeServer* SourceServer = Utils->FindServer(source);
 971         if (SourceServer)
 972         {
 973                 SourceServer->AddUserCount();
 974         }
 975
 976         FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
 977
 978         return true;
 979 }
 980
 981 /** Send one or more FJOINs for a channel of users.
 982  * If the length of a single line is more than 480-NICKMAX
 983  * in length, it is split over multiple lines.
 984  */
 985 void TreeSocket::SendFJoins(TreeServer* Current, chanrec* c)
 986 {
 987         std::string buffer;
 988         char list[MAXBUF];
 989         std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
 990
 991         size_t dlen, curlen;
 992         dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
 993         int numusers = 0;
 994         char* ptr = list + dlen;
 995
 996         CUList *ulist = c->GetUsers();
 997         std::string modes = "";
 998         std::string params = "";
 999
1000         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1001         {
1002                 // The first parameter gets a : before it
1003                 size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1004
1005                 curlen += ptrlen;
1006                 ptr += ptrlen;
1007
1008                 numusers++;
1009
1010                 if (curlen > (480-NICKMAX))
1011                 {
1012                         buffer.append(list).append("\r\n");
1013                         dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1014                         ptr = list + dlen;
1015                         ptrlen = 0;
1016                         numusers = 0;
1017                 }
1018         }
1019
1020         if (numusers)
1021                 buffer.append(list).append("\r\n");
1022
1023         /* Sorry for the hax. Because newly created channels assume +nt,
1024          * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes.
1025          */
1026         bool inverted = false;
1027         if (!c->IsModeSet('n'))
1028         {
1029                 modes.append("-n");
1030                 inverted = true;
1031         }
1032         if (!c->IsModeSet('t'))
1033         {
1034                 modes.append("-t");
1035                 inverted = true;
1036         }
1037         if (inverted)
1038         {
1039                 modes.append("+");
1040         }
1041
1042         buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true)).append("\r\n");
1043
1044         int linesize = 1;
1045         for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1046         {
1047                 int size = strlen(b->data) + 2;
1048                 int currsize = linesize + size;
1049                 if (currsize <= 350)
1050                 {
1051                         modes.append("b");
1052                         params.append(" ").append(b->data);
1053                         linesize += size;
1054                 }
1055                 if ((params.length() >= MAXMODES) || (currsize > 350))
1056                 {
1057                         /* Wrap at MAXMODES */
1058                         buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
1059                         modes = "";
1060                         params = "";
1061                         linesize = 1;
1062                 }
1063         }
1064
1065         /* Only send these if there are any */
1066         if (!modes.empty())
1067                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
1068
1069         this->WriteLine(buffer);
1070 }
1071
1072 /** Send G, Q, Z and E lines */
1073 void TreeSocket::SendXLines(TreeServer* Current)
1074 {
1075         char data[MAXBUF];
1076         std::string buffer;
1077         std::string n = this->Instance->Config->ServerName;
1078         const char* sn = n.c_str();
1079         /* Yes, these arent too nice looking, but they get the job done */
1080         for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++)
1081         {
1082                 snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1083                 buffer.append(data);
1084         }
1085         for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++)
1086         {
1087                 snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1088                 buffer.append(data);
1089         }
1090         for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++)
1091         {
1092                 snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1093                 buffer.append(data);
1094         }
1095         for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++)
1096         {
1097                 snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1098                 buffer.append(data);
1099         }
1100         for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++)
1101         {
1102                 snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1103                 buffer.append(data);
1104         }
1105         for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++)
1106         {
1107                 snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1108                 buffer.append(data);
1109         }
1110         for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++)
1111         {
1112                 snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1113                 buffer.append(data);
1114         }
1115         for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++)
1116         {
1117                 snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1118                 buffer.append(data);
1119         }
1120
1121         if (!buffer.empty())
1122                 this->WriteLine(buffer);
1123 }
1124
1125 /** Send channel modes and topics */
1126 void TreeSocket::SendChannelModes(TreeServer* Current)
1127 {
1128         char data[MAXBUF];
1129         std::deque<std::string> list;
1130         std::string n = this->Instance->Config->ServerName;
1131         const char* sn = n.c_str();
1132         for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
1133         {
1134                 SendFJoins(Current, c->second);
1135                 if (*c->second->topic)
1136                 {
1137                         snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1138                         this->WriteLine(data);
1139                 }
1140                 FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
1141                 list.clear();
1142                 c->second->GetExtList(list);
1143                 for (unsigned int j = 0; j < list.size(); j++)
1144                 {
1145                         FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
1146                 }
1147         }
1148 }
1149
1150 /** send all users and their oper state/modes */
1151 void TreeSocket::SendUsers(TreeServer* Current)
1152 {
1153         char data[MAXBUF];
1154         std::deque<std::string> list;
1155         std::string dataline;
1156         for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
1157         {
1158                 if (u->second->registered == REG_ALL)
1159                 {
1160                         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);
1161                         this->WriteLine(data);
1162                         if (*u->second->oper)
1163                         {
1164                                 snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
1165                                 this->WriteLine(data);
1166                         }
1167                         if (*u->second->awaymsg)
1168                         {
1169                                 snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
1170                                 this->WriteLine(data);
1171                         }
1172                         FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
1173                         list.clear();
1174                         u->second->GetExtList(list);
1175
1176                         for (unsigned int j = 0; j < list.size(); j++)
1177                         {
1178                                 FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
1179                         }
1180                 }
1181         }
1182 }
1183
1184 /** This function is called when we want to send a netburst to a local
1185  * server. There is a set order we must do this, because for example
1186  * users require their servers to exist, and channels require their
1187  * users to exist. You get the idea.
1188  */
1189 void TreeSocket::DoBurst(TreeServer* s)
1190 {
1191         std::string burst = "BURST "+ConvToStr(Instance->Time(true));
1192         std::string endburst = "ENDBURST";
1193         // Because by the end of the netburst, it  could be gone!
1194         std::string name = s->GetName();
1195         this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
1196         this->WriteLine(burst);
1197         /* send our version string */
1198         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1199         /* Send server tree */
1200         this->SendServers(Utils->TreeRoot,s,1);
1201         /* Send users and their oper status */
1202         this->SendUsers(s);
1203         /* Send everything else (channel modes, xlines etc) */
1204         this->SendChannelModes(s);
1205         this->SendXLines(s);
1206         FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
1207         this->WriteLine(endburst);
1208         this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1209 }
1210
1211 /** This function is called when we receive data from a remote
1212  * server. We buffer the data in a std::string (it doesnt stay
1213  * there for long), reading using InspSocket::Read() which can
1214  * read up to 16 kilobytes in one operation.
1215  *
1216  * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1217  * THE SOCKET OBJECT FOR US.
1218  */
1219 bool TreeSocket::OnDataReady()
1220 {
1221         char* data = this->Read();
1222         /* Check that the data read is a valid pointer and it has some content */
1223         if (data && *data)
1224         {
1225                 this->in_buffer.append(data);
1226                 /* While there is at least one new line in the buffer,
1227                  * do something useful (we hope!) with it.
1228                  */
1229                 while (in_buffer.find("\n") != std::string::npos)
1230                 {
1231                         std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1232                         in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1233                         /* Use rfind here not find, as theres more
1234                          * chance of the \r being near the end of the
1235                          * string, not the start.
1236                          */
1237                         if (ret.find("\r") != std::string::npos)
1238                                 ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1239                         /* Process this one, abort if it
1240                          * didnt return true.
1241                          */
1242                         if (!this->ProcessLine(ret))
1243                         {
1244                                 return false;
1245                         }
1246                 }
1247                 return true;
1248         }
1249         /* EAGAIN returns an empty but non-NULL string, so this
1250          * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1251          */
1252         return (data && !*data);
1253 }
1254