src/modules/m_spanningtree/treesocket1.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 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 "inspircd.h"
  15 #include "commands/cmd_whois.h"
  16 #include "commands/cmd_stats.h"
  17 #include "socket.h"
  18 #include "wildcard.h"
  19 #include "xline.h"
  20 #include "transport.h"
  21 #include "m_hash.h"
  22 #include "socketengine.h"
  23
  24 #include "m_spanningtree/main.h"
  25 #include "m_spanningtree/utils.h"
  26 #include "m_spanningtree/treeserver.h"
  27 #include "m_spanningtree/link.h"
  28 #include "m_spanningtree/treesocket.h"
  29 #include "m_spanningtree/resolvers.h"
  30 #include "m_spanningtree/handshaketimer.h"
  31
  32 /* $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 m_hash.h */
  33
  34
  35 /** Because most of the I/O gubbins are encapsulated within
  36  * BufferedSocket, we just call the superclass constructor for
  37  * most of the action, and append a few of our own values
  38  * to it.
  39  */
  40 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod)
  41         : BufferedSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
  42 {
  43         myhost = host;
  44         this->LinkState = LISTENER;
  45         theirchallenge.clear();
  46         ourchallenge.clear();
  47         if (listening && Hook)
  48                 BufferedSocketHookRequest(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         : BufferedSocket(SI, host, port, listening, maxtime, bindto), Utils(Util), Hook(HookMod)
  53 {
  54         myhost = ServerName;
  55         theirchallenge.clear();
  56         ourchallenge.clear();
  57         this->LinkState = CONNECTING;
  58         if (Hook)
  59                 BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
  60 }
  61
  62 /** When a listening socket gives us a new file descriptor,
  63  * we must associate it with a socket without creating a new
  64  * connection. This constructor is used for this purpose.
  65  */
  66 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod)
  67         : BufferedSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
  68 {
  69         this->LinkState = WAIT_AUTH_1;
  70         theirchallenge.clear();
  71         ourchallenge.clear();
  72         sentcapab = false;
  73         /* If we have a transport module hooked to the parent, hook the same module to this
  74          * socket, and set a timer waiting for handshake before we send CAPAB etc.
  75          */
  76         if (Hook)
  77                 BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
  78
  79         Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils, 1));
  80 }
  81
  82 ServerState TreeSocket::GetLinkState()
  83 {
  84         return this->LinkState;
  85 }
  86
  87 Module* TreeSocket::GetHook()
  88 {
  89         return this->Hook;
  90 }
  91
  92 TreeSocket::~TreeSocket()
  93 {
  94         if (Hook)
  95                 BufferedSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
  96 }
  97
  98 const std::string& TreeSocket::GetOurChallenge()
  99 {
 100         return this->ourchallenge;
 101 }
 102
 103 void TreeSocket::SetOurChallenge(const std::string &c)
 104 {
 105         this->ourchallenge = c;
 106 }
 107
 108 const std::string& TreeSocket::GetTheirChallenge()
 109 {
 110         return this->theirchallenge;
 111 }
 112
 113 void TreeSocket::SetTheirChallenge(const std::string &c)
 114 {
 115         this->theirchallenge = c;
 116 }
 117
 118 std::string TreeSocket::MakePass(const std::string &password, const std::string &challenge)
 119 {
 120         /* This is a simple (maybe a bit hacky?) HMAC algorithm, thanks to jilles for
 121          * suggesting the use of HMAC to secure the password against various attacks.
 122          *
 123          * Note: If m_sha256.so is not loaded, we MUST fall back to plaintext with no
 124          *       HMAC challenge/response.
 125          */
 126         Module* sha256 = Instance->Modules->Find("m_sha256.so");
 127         if (Utils->ChallengeResponse && sha256 && !challenge.empty())
 128         {
 129                 /* XXX: This is how HMAC is supposed to be done:
 130                  *
 131                  * sha256( (pass xor 0x5c) + sha256((pass xor 0x36) + m) )
 132                  *
 133                  * Note that we are encoding the hex hash, not the binary
 134                  * output of the hash which is slightly different to standard.
 135                  *
 136                  * Don't ask me why its always 0x5c and 0x36... it just is.
 137                  */
 138                 std::string hmac1, hmac2;
 139
 140                 for (size_t n = 0; n < password.length(); n++)
 141                 {
 142                         hmac1 += static_cast<char>(password[n] ^ 0x5C);
 143                         hmac2 += static_cast<char>(password[n] ^ 0x36);
 144                 }
 145
 146                 hmac2 += challenge;
 147                 HashResetRequest(Utils->Creator, sha256).Send();
 148                 hmac2 = HashSumRequest(Utils->Creator, sha256, hmac2).Send();
 149
 150                 HashResetRequest(Utils->Creator, sha256).Send();
 151                 std::string hmac = hmac1 + hmac2;
 152                 hmac = HashSumRequest(Utils->Creator, sha256, hmac).Send();
 153
 154                 return "HMAC-SHA256:"+ hmac;
 155         }
 156         else if (!challenge.empty() && !sha256)
 157                 Instance->Log(DEFAULT,"Not authenticating to server using SHA256/HMAC because we don't have m_sha256 loaded!");
 158
 159         return password;
 160 }
 161
 162 /** When an outbound connection finishes connecting, we receive
 163  * this event, and must send our SERVER string to the other
 164  * side. If the other side is happy, as outlined in the server
 165  * to server docs on the inspircd.org site, the other side
 166  * will then send back its own server string.
 167  */
 168 bool TreeSocket::OnConnected()
 169 {
 170         if (this->LinkState == CONNECTING)
 171         {
 172                 /* we do not need to change state here. */
 173                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 174                 {
 175                         if (x->Name == this->myhost)
 176                         {
 177                                 Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2[%s] started.", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->GetIP().c_str()));
 178                                 if (Hook)
 179                                 {
 180                                         BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 181                                         Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2[%s] using transport \2%s\2", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->GetIP().c_str()),
 182                                                         x->Hook.c_str());
 183                                 }
 184                                 this->OutboundPass = x->SendPass;
 185                                 sentcapab = false;
 186
 187                                 /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 188                                 if (this->GetHook())
 189                                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils, 1));
 190                                 else
 191                                         this->SendCapabilities();
 192
 193                                 return true;
 194                         }
 195                 }
 196         }
 197         /* There is a (remote) chance that between the /CONNECT and the connection
 198          * being accepted, some muppet has removed the <link> block and rehashed.
 199          * If that happens the connection hangs here until it's closed. Unlikely
 200          * and rather harmless.
 201          */
 202         this->Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2 lost link tag(!)", myhost.c_str());
 203         return true;
 204 }
 205
 206 void TreeSocket::OnError(BufferedSocketError e)
 207 {
 208         Link* MyLink;
 209
 210         if (this->LinkState == LISTENER)
 211                 return;
 212
 213         switch (e)
 214         {
 215                 case I_ERR_CONNECT:
 216                         Utils->Creator->RemoteMessage(NULL,"Connection failed: Connection to \002%s\002 refused", myhost.c_str());
 217                         MyLink = Utils->FindLink(myhost);
 218                         if (MyLink)
 219                                 Utils->DoFailOver(MyLink);
 220                 break;
 221                 case I_ERR_SOCKET:
 222                         Utils->Creator->RemoteMessage(NULL,"Connection failed: Could not create socket");
 223                 break;
 224                 case I_ERR_BIND:
 225                         Utils->Creator->RemoteMessage(NULL,"Connection failed: Error binding socket to address or port");
 226                 break;
 227                 case I_ERR_WRITE:
 228                         Utils->Creator->RemoteMessage(NULL,"Connection failed: I/O error on connection");
 229                 break;
 230                 case I_ERR_NOMOREFDS:
 231                         Utils->Creator->RemoteMessage(NULL,"Connection failed: Operating system is out of file descriptors!");
 232                 break;
 233                 default:
 234                         if ((errno) && (errno != EINPROGRESS) && (errno != EAGAIN))
 235                                 Utils->Creator->RemoteMessage(NULL,"Connection to \002%s\002 failed with OS error: %s", myhost.c_str(), strerror(errno));
 236                 break;
 237         }
 238 }
 239
 240 int TreeSocket::OnDisconnect()
 241 {
 242         /* For the same reason as above, we don't
 243          * handle OnDisconnect()
 244          */
 245         return true;
 246 }
 247
 248 /** Recursively send the server tree with distances as hops.
 249  * This is used during network burst to inform the other server
 250  * (and any of ITS servers too) of what servers we know about.
 251  * If at any point any of these servers already exist on the other
 252  * end, our connection may be terminated. The hopcounts given
 253  * by this function are relative, this doesn't matter so long as
 254  * they are all >1, as all the remote servers re-calculate them
 255  * to be relative too, with themselves as hop 0.
 256  */
 257 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
 258 {
 259         char command[1024];
 260         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 261         {
 262                 TreeServer* recursive_server = Current->GetChild(q);
 263                 if (recursive_server != s)
 264                 {
 265                         snprintf(command,1024,":%s SERVER %s * %d %s :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,
 266                                         recursive_server->GetID().c_str(),
 267                                         recursive_server->GetDesc().c_str());
 268                         this->WriteLine(command);
 269                         this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 270                         /* down to next level */
 271                         this->SendServers(recursive_server, s, hops+1);
 272                 }
 273         }
 274 }
 275
 276 std::string TreeSocket::RandString(unsigned int length)
 277 {
 278         char* randombuf = new char[length+1];
 279         std::string out;
 280 #ifdef WINDOWS
 281         int fd = -1;
 282 #else
 283         int fd = open("/dev/urandom", O_RDONLY, 0);
 284 #endif
 285
 286         if (fd >= 0)
 287         {
 288 #ifndef WINDOWS
 289                 read(fd, randombuf, length);
 290                 close(fd);
 291 #endif
 292         }
 293         else
 294         {
 295                 for (unsigned int i = 0; i < length; i++)
 296                         randombuf[i] = rand();
 297         }
 298
 299         for (unsigned int i = 0; i < length; i++)
 300         {
 301                 char randchar = static_cast<char>((randombuf[i] & 0x7F) | 0x21);
 302                 out += (randchar == '=' ? '_' : randchar);
 303         }
 304
 305         delete[] randombuf;
 306         return out;
 307 }
 308
 309 void TreeSocket::SendError(const std::string &errormessage)
 310 {
 311         /* Display the error locally as well as sending it remotely */
 312         Utils->Creator->RemoteMessage(NULL, "Sent \2ERROR\2 to %s: %s", (this->InboundServerName.empty() ? "<unknown>" : this->InboundServerName.c_str()), errormessage.c_str());
 313         this->WriteLine("ERROR :"+errormessage);
 314         /* One last attempt to make sure the error reaches its target */
 315         this->FlushWriteBuffer();
 316 }
 317
 318 /** This function forces this server to quit, removing this server
 319  * and any users on it (and servers and users below that, etc etc).
 320  * It's very slow and pretty clunky, but luckily unless your network
 321  * is having a REAL bad hair day, this function shouldnt be called
 322  * too many times a month ;-)
 323  */
 324 void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
 325 {
 326         /* recursively squit the servers attached to 'Current'.
 327          * We're going backwards so we don't remove users
 328          * while we still need them ;)
 329          */
 330         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 331         {
 332                 TreeServer* recursive_server = Current->GetChild(q);
 333                 this->SquitServer(from,recursive_server);
 334         }
 335         /* Now we've whacked the kids, whack self */
 336         num_lost_servers++;
 337         num_lost_users += Current->QuitUsers(from);
 338 }
 339
 340 /** This is a wrapper function for SquitServer above, which
 341  * does some validation first and passes on the SQUIT to all
 342  * other remaining servers.
 343  */
 344 void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
 345 {
 346         if ((Current) && (Current != Utils->TreeRoot))
 347         {
 348                 Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
 349                 rmode.Send(Instance);
 350
 351                 std::deque<std::string> params;
 352                 params.push_back(Current->GetName());
 353                 params.push_back(":"+reason);
 354                 Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 355                 if (Current->GetParent() == Utils->TreeRoot)
 356                 {
 357                         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split: "+reason);
 358                 }
 359                 else
 360                 {
 361                         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 362                 }
 363                 num_lost_servers = 0;
 364                 num_lost_users = 0;
 365                 std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
 366                 SquitServer(from, Current);
 367                 Current->Tidy();
 368                 Current->GetParent()->DelChild(Current);
 369                 delete Current;
 370                 this->Instance->SNO->WriteToSnoMask('l',"Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 371         }
 372         else
 373                 Instance->Log(DEFAULT,"Squit from unknown server");
 374 }
 375
 376 /** Send one or more FJOINs for a channel of users.
 377  * If the length of a single line is more than 480-NICKMAX
 378  * in length, it is split over multiple lines.
 379  */
 380 void TreeSocket::SendFJoins(TreeServer* Current, Channel* c)
 381 {
 382         std::string buffer;
 383         char list[MAXBUF];
 384         std::string individual_halfops = std::string(":")+this->Instance->Config->GetSID()+" FMODE "+c->name+" "+ConvToStr(c->age);
 385
 386         size_t dlen, curlen;
 387         dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->GetSID().c_str(),c->name,(unsigned long)c->age);
 388         int numusers = 1;
 389         char* ptr = list + dlen;
 390
 391         CUList *ulist = c->GetUsers();
 392         std::string modes;
 393         std::string params;
 394
 395         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 396         {
 397                 // The first parameter gets a : before it
 398                 size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->first), i->first->uuid);
 399
 400                 curlen += ptrlen;
 401                 ptr += ptrlen;
 402
 403                 numusers++;
 404
 405                 if (curlen > (480-NICKMAX))
 406                 {
 407                         buffer.append(list).append("\r\n");
 408                         dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->GetSID().c_str(),c->name,(unsigned long)c->age);
 409                         ptr = list + dlen;
 410                         ptrlen = 0;
 411                         numusers = 0;
 412                 }
 413         }
 414
 415         if (numusers)
 416                 buffer.append(list).append("\r\n");
 417
 418         buffer.append(":").append(this->Instance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true)).append("\r\n");
 419
 420         int linesize = 1;
 421         for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
 422         {
 423                 int size = strlen(b->data) + 2;
 424                 int currsize = linesize + size;
 425                 if (currsize <= 350)
 426                 {
 427                         modes.append("b");
 428                         params.append(" ").append(b->data);
 429                         linesize += size;
 430                 }
 431                 if ((params.length() >= MAXMODES) || (currsize > 350))
 432                 {
 433                         /* Wrap at MAXMODES */
 434                         buffer.append(":").append(this->Instance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
 435                         modes.clear();
 436                         params.clear();
 437                         linesize = 1;
 438                 }
 439         }
 440
 441         /* Only send these if there are any */
 442         if (!modes.empty())
 443                 buffer.append(":").append(this->Instance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
 444
 445         this->WriteLine(buffer);
 446 }
 447
 448 /** Send G, Q, Z and E lines */
 449 void TreeSocket::SendXLines(TreeServer* Current)
 450 {
 451         char data[MAXBUF];
 452         std::string buffer;
 453         std::string n = this->Instance->Config->GetSID();
 454         const char* sn = n.c_str();
 455
 456         std::vector<std::string> types = Instance->XLines->GetAllTypes();
 457
 458         for (std::vector<std::string>::iterator it = types.begin(); it != types.end(); ++it)
 459         {
 460                 XLineLookup* lookup = Instance->XLines->GetAll(*it);
 461
 462                 if (lookup)
 463                 {
 464                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 465                         {
 466                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s\r\n",sn, it->c_str(), i->second->Displayable(),
 467                                                 i->second->source,
 468                                                 (unsigned long)i->second->set_time,
 469                                                 (unsigned long)i->second->duration,
 470                                                 i->second->reason);
 471                                 buffer.append(data);
 472                         }
 473                 }
 474         }
 475
 476         if (!buffer.empty())
 477                 this->WriteLine(buffer);
 478 }
 479
 480 /** Send channel modes and topics */
 481 void TreeSocket::SendChannelModes(TreeServer* Current)
 482 {
 483         char data[MAXBUF];
 484         std::deque<std::string> list;
 485         std::string n = this->Instance->Config->GetSID();
 486         const char* sn = n.c_str();
 487         Instance->Log(DEBUG,"Sending channels and modes, %d to send", this->Instance->chanlist->size());
 488         for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
 489         {
 490                 SendFJoins(Current, c->second);
 491                 if (*c->second->topic)
 492                 {
 493                         snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
 494                         this->WriteLine(data);
 495                 }
 496                 FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
 497                 list.clear();
 498                 c->second->GetExtList(list);
 499                 for (unsigned int j = 0; j < list.size(); j++)
 500                 {
 501                         FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
 502                 }
 503         }
 504 }
 505
 506 /** send all users and their oper state/modes */
 507 void TreeSocket::SendUsers(TreeServer* Current)
 508 {
 509         char data[MAXBUF];
 510         std::deque<std::string> list;
 511         std::string dataline;
 512         for (user_hash::iterator u = this->Instance->Users->clientlist->begin(); u != this->Instance->Users->clientlist->end(); u++)
 513         {
 514                 if (u->second->registered == REG_ALL)
 515                 {
 516                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 517                         if (theirserver)
 518                         {
 519                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s +%s %s %lu :%s", theirserver->GetID().c_str(), u->second->uuid,
 520                                                 (unsigned long)u->second->age, u->second->nick, u->second->host, u->second->dhost,
 521                                                 u->second->ident, u->second->FormatModes(), u->second->GetIPString(),
 522                                                 (unsigned long)u->second->signon, u->second->fullname);
 523                                 this->WriteLine(data);
 524                                 if (*u->second->oper)
 525                                 {
 526                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid, u->second->oper);
 527                                         this->WriteLine(data);
 528                                 }
 529                                 if (*u->second->awaymsg)
 530                                 {
 531                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->uuid, u->second->awaymsg);
 532                                         this->WriteLine(data);
 533                                 }
 534                         }
 535
 536                         FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
 537                         list.clear();
 538                         u->second->GetExtList(list);
 539                         for (unsigned int j = 0; j < list.size(); j++)
 540                         {
 541                                 FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
 542                         }
 543                 }
 544         }
 545 }
 546
 547 /** This function is called when we want to send a netburst to a local
 548  * server. There is a set order we must do this, because for example
 549  * users require their servers to exist, and channels require their
 550  * users to exist. You get the idea.
 551  */
 552 void TreeSocket::DoBurst(TreeServer* s)
 553 {
 554         std::string name = s->GetName();
 555         std::string burst = ":" + this->Instance->Config->GetSID() + " BURST " +ConvToStr(Instance->Time(true));
 556         std::string endburst = ":" + this->Instance->Config->GetSID() + " ENDBURST";
 557         this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s).", name.c_str(), this->GetTheirChallenge().empty() ? "plaintext password" : "SHA256-HMAC challenge-response");
 558         this->WriteLine(burst);
 559         /* send our version string */
 560         this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" VERSION :"+this->Instance->GetVersionString());
 561         /* Send server tree */
 562         this->SendServers(Utils->TreeRoot,s,1);
 563         /* Send users and their oper status */
 564         this->SendUsers(s);
 565         /* Send everything else (channel modes, xlines etc) */
 566         this->SendChannelModes(s);
 567         this->SendXLines(s);
 568         FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
 569         this->WriteLine(endburst);
 570         this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
 571 }
 572
 573 /** This function is called when we receive data from a remote
 574  * server. We buffer the data in a std::string (it doesnt stay
 575  * there for long), reading using BufferedSocket::Read() which can
 576  * read up to 16 kilobytes in one operation.
 577  *
 578  * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
 579  * THE SOCKET OBJECT FOR US.
 580  */
 581 bool TreeSocket::OnDataReady()
 582 {
 583         char* data = this->Read();
 584         /* Check that the data read is a valid pointer and it has some content */
 585         if (data && *data)
 586         {
 587                 this->in_buffer.append(data);
 588                 /* While there is at least one new line in the buffer,
 589                  * do something useful (we hope!) with it.
 590                  */
 591                 while (in_buffer.find("\n") != std::string::npos)
 592                 {
 593                         std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
 594                         in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
 595                         /* Use rfind here not find, as theres more
 596                          * chance of the \r being near the end of the
 597                          * string, not the start.
 598                          */
 599                         if (ret.find("\r") != std::string::npos)
 600                                 ret = in_buffer.substr(0,in_buffer.find("\r")-1);
 601                         /* Process this one, abort if it
 602                          * didnt return true.
 603                          */
 604                         if (!this->ProcessLine(ret))
 605                         {
 606                                 return false;
 607                         }
 608                 }
 609                 return true;
 610         }
 611         /* EAGAIN returns an empty but non-NULL string, so this
 612          * evaluates to TRUE for EAGAIN but to FALSE for EOF.
 613          */
 614         return (data && !*data);
 615 }