src/modules/m_spanningtree/utils.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
  21 /* $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 */
  22
  23 /** Yay for fast searches!
  24  * This is hundreds of times faster than recursion
  25  * or even scanning a linked list, especially when
  26  * there are more than a few servers to deal with.
  27  * (read as: lots).
  28  */
  29 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
  30 {
  31         server_hash::iterator iter;
  32         iter = serverlist.find(ServerName.c_str());
  33         if (iter != serverlist.end())
  34         {
  35                 return iter->second;
  36         }
  37         else
  38         {
  39                 return NULL;
  40         }
  41 }
  42
  43 /** Returns the locally connected server we must route a
  44  * message through to reach server 'ServerName'. This
  45  * only applies to one-to-one and not one-to-many routing.
  46  * See the comments for the constructor of TreeServer
  47  * for more details.
  48  */
  49 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
  50 {
  51         if (ServerName.c_str() == TreeRoot->GetName())
  52                 return NULL;
  53         TreeServer* Found = FindServer(ServerName);
  54         if (Found)
  55         {
  56                 return Found->GetRoute();
  57         }
  58         else
  59         {
  60                 return NULL;
  61         }
  62 }
  63
  64 /** Find the first server matching a given glob mask.
  65  * Theres no find-using-glob method of hash_map [awwww :-(]
  66  * so instead, we iterate over the list using an iterator
  67  * and match each one until we get a hit. Yes its slow,
  68  * deal with it.
  69  */
  70 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
  71 {
  72         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
  73         {
  74                 if (match(i->first.c_str(),ServerName.c_str()))
  75                         return i->second;
  76         }
  77         return NULL;
  78 }
  79
  80 /* A convenient wrapper that returns true if a server exists */
  81 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
  82 {
  83         return (FindServer(ServerName) != NULL);
  84 }
  85
  86 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
  87 {
  88         Bindings.clear();
  89
  90         lines_to_apply = 0;
  91
  92         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
  93
  94         modulelist* ml = ServerInstance->FindInterface("InspSocketHook");
  95
  96         /* Did we find any modules? */
  97         if (ml)
  98         {
  99                 /* Yes, enumerate them all to find out the hook name */
 100                 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
 101                 {
 102                         /* Make a request to it for its name, its implementing
 103                          * InspSocketHook so we know its safe to do this
 104                          */
 105                         std::string name = InspSocketNameRequest((Module*)Creator, *m).Send();
 106                         /* Build a map of them */
 107                         hooks[name.c_str()] = *m;
 108                         hooknames.push_back(name);
 109                 }
 110         }
 111
 112         this->ReadConfiguration(true);
 113 }
 114
 115 SpanningTreeUtilities::~SpanningTreeUtilities()
 116 {
 117         for (unsigned int i = 0; i < Bindings.size(); i++)
 118         {
 119                 ServerInstance->SE->DelFd(Bindings[i]);
 120                 Bindings[i]->Close();
 121                 DELETE(Bindings[i]);
 122         }
 123         while (TreeRoot->ChildCount())
 124         {
 125                 TreeServer* child_server = TreeRoot->GetChild(0);
 126                 if (child_server)
 127                 {
 128                         TreeSocket* sock = child_server->GetSocket();
 129                         ServerInstance->SE->DelFd(sock);
 130                         sock->Close();
 131                         DELETE(sock);
 132                 }
 133         }
 134         delete TreeRoot;
 135 }
 136
 137 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
 138 {
 139         if (list.find(server) == list.end())
 140                 list[server] = server;
 141 }
 142
 143 /* returns a list of DIRECT servernames for a specific channel */
 144 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list)
 145 {
 146         CUList *ulist;
 147         switch (status)
 148         {
 149                 case '@':
 150                         ulist = c->GetOppedUsers();
 151                 break;
 152                 case '%':
 153                         ulist = c->GetHalfoppedUsers();
 154                 break;
 155                 case '+':
 156                         ulist = c->GetVoicedUsers();
 157                 break;
 158                 default:
 159                         ulist = c->GetUsers();
 160                 break;
 161         }
 162         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 163         {
 164                 if ((i->second->GetFd() < 0) && (exempt_list.find(i->second) == exempt_list.end()))
 165                 {
 166                         TreeServer* best = this->BestRouteTo(i->second->server);
 167                         if (best)
 168                                 AddThisServer(best,list);
 169                 }
 170         }
 171         return;
 172 }
 173
 174 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
 175 {
 176         char pfx = 0;
 177         TreeServer* omitroute = this->BestRouteTo(omit);
 178         if ((command == "NOTICE") || (command == "PRIVMSG"))
 179         {
 180                 if (params.size() >= 2)
 181                 {
 182                         /* Prefixes */
 183                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
 184                         {
 185                                 pfx = params[0][0];
 186                                 params[0] = params[0].substr(1, params[0].length()-1);
 187                         }
 188                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
 189                         {
 190                                 // special routing for private messages/notices
 191                                 userrec* d = ServerInstance->FindNick(params[0]);
 192                                 if (d)
 193                                 {
 194                                         std::deque<std::string> par;
 195                                         par.push_back(params[0]);
 196                                         par.push_back(":"+params[1]);
 197                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
 198                                         return true;
 199                                 }
 200                         }
 201                         else if (*(params[0].c_str()) == '$')
 202                         {
 203                                 std::deque<std::string> par;
 204                                 par.push_back(params[0]);
 205                                 par.push_back(":"+params[1]);
 206                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
 207                                 return true;
 208                         }
 209                         else
 210                         {
 211                                 chanrec* c = ServerInstance->FindChan(params[0]);
 212                                 userrec* u = ServerInstance->FindNick(prefix);
 213                                 if (c && u)
 214                                 {
 215                                         CUList elist;
 216                                         TreeServerList list;
 217                                         FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist));
 218                                         GetListOfServersForChannel(c,list,pfx,elist);
 219
 220                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
 221                                         {
 222                                                 TreeSocket* Sock = i->second->GetSocket();
 223                                                 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
 224                                                 {
 225                                                         Sock->WriteLine(data);
 226                                                 }
 227                                         }
 228                                         return true;
 229                                 }
 230                         }
 231                 }
 232         }
 233         unsigned int items =this->TreeRoot->ChildCount();
 234         for (unsigned int x = 0; x < items; x++)
 235         {
 236                 TreeServer* Route = this->TreeRoot->GetChild(x);
 237                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
 238                 {
 239                         TreeSocket* Sock = Route->GetSocket();
 240                         if (Sock)
 241                                 Sock->WriteLine(data);
 242                 }
 243         }
 244         return true;
 245 }
 246
 247 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
 248 {
 249         TreeServer* omitroute = this->BestRouteTo(omit);
 250         std::string FullLine = ":" + prefix + " " + command;
 251         unsigned int words = params.size();
 252         for (unsigned int x = 0; x < words; x++)
 253         {
 254                 FullLine = FullLine + " " + params[x];
 255         }
 256         unsigned int items = this->TreeRoot->ChildCount();
 257         for (unsigned int x = 0; x < items; x++)
 258         {
 259                 TreeServer* Route = this->TreeRoot->GetChild(x);
 260                 // Send the line IF:
 261                 // The route has a socket (its a direct connection)
 262                 // The route isnt the one to be omitted
 263                 // The route isnt the path to the one to be omitted
 264                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
 265                 {
 266                         TreeSocket* Sock = Route->GetSocket();
 267                         if (Sock)
 268                                 Sock->WriteLine(FullLine);
 269                 }
 270         }
 271         return true;
 272 }
 273
 274 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
 275 {
 276         std::string FullLine = ":" + prefix + " " + command;
 277         unsigned int words = params.size();
 278         for (unsigned int x = 0; x < words; x++)
 279         {
 280                 FullLine = FullLine + " " + params[x];
 281         }
 282         unsigned int items = this->TreeRoot->ChildCount();
 283         for (unsigned int x = 0; x < items; x++)
 284         {
 285                 TreeServer* Route = this->TreeRoot->GetChild(x);
 286                 if (Route && Route->GetSocket())
 287                 {
 288                         TreeSocket* Sock = Route->GetSocket();
 289                         if (Sock)
 290                                 Sock->WriteLine(FullLine);
 291                 }
 292         }
 293         return true;
 294 }
 295
 296 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
 297 {
 298         std::string spfx = prefix;
 299         std::string scmd = command;
 300         return this->DoOneToMany(spfx, scmd, params);
 301 }
 302
 303 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
 304 {
 305         std::string spfx = prefix;
 306         std::string scmd = command;
 307         return this->DoOneToAllButSender(spfx, scmd, params, omit);
 308 }
 309
 310 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
 311 {
 312         TreeServer* Route = this->BestRouteTo(target);
 313         if (Route)
 314         {
 315                 std::string FullLine = ":" + prefix + " " + command;
 316                 unsigned int words = params.size();
 317                 for (unsigned int x = 0; x < words; x++)
 318                 {
 319                         FullLine = FullLine + " " + params[x];
 320                 }
 321                 if (Route && Route->GetSocket())
 322                 {
 323                         TreeSocket* Sock = Route->GetSocket();
 324                         if (Sock)
 325                                 Sock->WriteLine(FullLine);
 326                 }
 327                 return true;
 328         }
 329         else
 330         {
 331                 return false;
 332         }
 333 }
 334
 335 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
 336 {
 337         ConfigReader* Conf = new ConfigReader(ServerInstance);
 338         if (rebind)
 339         {
 340                 for (int j =0; j < Conf->Enumerate("bind"); j++)
 341                 {
 342                         std::string Type = Conf->ReadValue("bind","type",j);
 343                         std::string IP = Conf->ReadValue("bind","address",j);
 344                         std::string Port = Conf->ReadValue("bind","port",j);
 345                         std::string transport = Conf->ReadValue("bind","transport",j);
 346                         if (Type == "servers")
 347                         {
 348                                 irc::portparser portrange(Port, false);
 349                                 int portno = -1;
 350                                 while ((portno = portrange.GetToken()))
 351                                 {
 352                                         if (IP == "*")
 353                                                 IP = "";
 354
 355                                         if ((!transport.empty()) && (hooks.find(transport.c_str()) ==  hooks.end()))
 356                                         {
 357                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for port %s:%s - maybe you forgot to load it BEFORE m_spanningtree in your config file? - Skipping this port binding", transport.c_str(), IP.c_str(), Port.c_str());
 358                                                 break;
 359                                         }
 360
 361                                         TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(), portno, true, 10, transport.empty() ? NULL : hooks[transport.c_str()]);
 362                                         if (listener->GetState() == I_LISTENING)
 363                                         {
 364                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), portno);
 365                                                 Bindings.push_back(listener);
 366                                         }
 367                                         else
 368                                         {
 369                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port: %s:%d: %s",IP.c_str(), portno, strerror(errno));
 370                                                 listener->Close();
 371                                                 DELETE(listener);
 372                                         }
 373                                 }
 374                         }
 375                 }
 376         }
 377         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
 378         HideULines = Conf->ReadFlag("options","hideulines",0);
 379         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
 380         EnableTimeSync = Conf->ReadFlag("options","timesync",0);
 381         LinkBlocks.clear();
 382         ValidIPs.clear();
 383         for (int j =0; j < Conf->Enumerate("link"); j++)
 384         {
 385                 Link L;
 386                 std::string Allow = Conf->ReadValue("link","allowmask",j);
 387                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
 388                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
 389                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
 390                 L.Port = Conf->ReadInteger("link","port",j,true);
 391                 L.SendPass = Conf->ReadValue("link","sendpass",j);
 392                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
 393                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
 394                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
 395                 L.Timeout = Conf->ReadInteger("link","timeout",j,true);
 396                 L.Hook = Conf->ReadValue("link", "transport", j);
 397                 L.Bind = Conf->ReadValue("link", "bind", j);
 398
 399                 if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) ==  hooks.end()))
 400                 {
 401                         ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for link '%s' - maybe you forgot to load it BEFORE m_spanningtree in your config file? Skipping <link> tag completely.",
 402                         L.Hook.c_str(), L.Name.c_str());
 403                         continue;
 404
 405                 }
 406
 407                 L.NextConnectTime = time(NULL) + L.AutoConnect;
 408                 /* Bugfix by brain, do not allow people to enter bad configurations */
 409                 if (L.Name != ServerInstance->Config->ServerName)
 410                 {
 411                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
 412                         {
 413                                 ValidIPs.push_back(L.IPAddr);
 414
 415                                 if (Allow.length())
 416                                         ValidIPs.push_back(Allow);
 417
 418                                 /* Needs resolving */
 419                                 bool ipvalid = true;
 420                                 QueryType start_type = DNS_QUERY_A;
 421 #ifdef IPV6
 422                                 start_type = DNS_QUERY_AAAA;
 423                                 if (strchr(L.IPAddr.c_str(),':'))
 424                                 {
 425                                         in6_addr n;
 426                                         if (inet_pton(AF_INET6, L.IPAddr.c_str(), &n) < 1)
 427                                                 ipvalid = false;
 428                                 }
 429                                 else
 430                                 {
 431                                         in_addr n;
 432                                         if (inet_aton(L.IPAddr.c_str(),&n) < 1)
 433                                                 ipvalid = false;
 434                                 }
 435 #else
 436                                 in_addr n;
 437                                 if (inet_aton(L.IPAddr.c_str(),&n) < 1)
 438                                         ipvalid = false;
 439 #endif
 440
 441                                 if (!ipvalid)
 442                                 {
 443                                         try
 444                                         {
 445                                                 bool cached;
 446                                                 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L, cached, start_type);
 447                                                 ServerInstance->AddResolver(sr, cached);
 448                                         }
 449                                         catch (ModuleException& e)
 450                                         {
 451                                         }
 452                                 }
 453
 454                                 LinkBlocks.push_back(L);
 455                         }
 456                         else
 457                         {
 458                                 if (L.IPAddr == "")
 459                                 {
 460                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
 461                                 }
 462                                 else if (L.RecvPass == "")
 463                                 {
 464                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
 465                                 }
 466                                 else if (L.SendPass == "")
 467                                 {
 468                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
 469                                 }
 470                                 else if (L.Name == "")
 471                                 {
 472                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
 473                                 }
 474                                 else if (!L.Port)
 475                                 {
 476                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
 477                                 }
 478                         }
 479                 }
 480                 else
 481                 {
 482                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
 483                 }
 484         }
 485         DELETE(Conf);
 486 }
 487
 488 void SpanningTreeUtilities::DoFailOver(Link* x)
 489 {
 490         if (x->FailOver.length())
 491         {
 492                 if (x->FailOver == x->Name)
 493                 {
 494                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Some muppet configured the failover for server \002%s\002 to point at itself. Not following it!", x->Name.c_str());
 495                         return;
 496                 }
 497                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
 498                 if (TryThisOne)
 499                 {
 500                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
 501                         Creator->ConnectServer(TryThisOne);
 502                 }
 503                 else
 504                 {
 505                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
 506                 }
 507         }
 508 }
 509
 510 Link* SpanningTreeUtilities::FindLink(const std::string& name)
 511 {
 512         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 513         {
 514                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
 515                 {
 516                         return &(*x);
 517                 }
 518         }
 519         return NULL;
 520 }
 521