src/modules/m_spanningtree/treesocket1.cpp

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