1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
17 #include "../transport.h"
18 #include "socketengine.h"
22 #include "treeserver.h"
24 #include "treesocket.h"
25 #include "resolvers.h"
27 /* $ModDep: m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h */
29 /* Create server sockets off a listener. */
30 void ServerSocketListener::OnAcceptReady(int newsock)
34 std::string incomingip;
35 irc::sockets::satoap(&client, incomingip, port);
36 char *ip = const_cast<char*>(incomingip.c_str());
38 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
41 for (std::vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
43 if (*i == "*" || irc::sockets::MatchCIDR(ip, *i))
52 this->ServerInstance->SNO->WriteToSnoMask('l', "Server connection from %s denied (no link blocks with that IP address)", ip);
53 ServerInstance->SE->Close(newsock);
58 if (this->GetIOHook())
60 this->GetIOHook()->OnRawSocketAccept(newsock, &client, &server);
63 /* we don't need a pointer to this, creating it stores it in the necessary places */
64 new TreeSocket(this->Utils, this->ServerInstance, newsock, ip, this->GetIOHook());
68 /** Yay for fast searches!
69 * This is hundreds of times faster than recursion
70 * or even scanning a linked list, especially when
71 * there are more than a few servers to deal with.
74 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
76 if (this->ServerInstance->IsSID(ServerName))
77 return this->FindServerID(ServerName);
79 server_hash::iterator iter = serverlist.find(ServerName.c_str());
80 if (iter != serverlist.end())
90 /** Returns the locally connected server we must route a
91 * message through to reach server 'ServerName'. This
92 * only applies to one-to-one and not one-to-many routing.
93 * See the comments for the constructor of TreeServer
96 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
98 if (ServerName.c_str() == TreeRoot->GetName() || ServerName == ServerInstance->Config->GetSID())
100 TreeServer* Found = FindServer(ServerName);
103 return Found->GetRoute();
107 // Cheat a bit. This allows for (better) working versions of routing commands with nick based prefixes, without hassle
108 User *u = ServerInstance->FindNick(ServerName);
111 Found = FindServer(u->server);
113 return Found->GetRoute();
120 /** Find the first server matching a given glob mask.
121 * Theres no find-using-glob method of hash_map [awwww :-(]
122 * so instead, we iterate over the list using an iterator
123 * and match each one until we get a hit. Yes its slow,
126 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
128 for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
130 if (InspIRCd::Match(i->first,ServerName))
136 TreeServer* SpanningTreeUtilities::FindServerID(const std::string &id)
138 server_hash::iterator iter = sidlist.find(id);
139 if (iter != sidlist.end())
145 /* A convenient wrapper that returns true if a server exists */
146 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
148 return (FindServer(ServerName) != NULL);
151 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
155 ServerInstance->Logs->Log("m_spanningtree",DEBUG,"***** Using SID for hash: %s *****", ServerInstance->Config->GetSID().c_str());
157 this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc, ServerInstance->Config->GetSID());
158 this->ServerUser = new FakeUser(ServerInstance, TreeRoot->GetID());
160 this->ReadConfiguration(true);
163 SpanningTreeUtilities::~SpanningTreeUtilities()
165 for (unsigned int i = 0; i < Bindings.size(); i++)
170 while (TreeRoot->ChildCount())
172 TreeServer* child_server = TreeRoot->GetChild(0);
175 TreeSocket* sock = child_server->GetSocket();
176 ServerInstance->SE->DelFd(sock);
181 // This avoids a collision on reload
182 ServerUser->uuid = TreeRoot->GetID();
185 ServerInstance->BufferedSocketCull();
188 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
190 if (list.find(server) == list.end())
191 list[server] = server;
194 /* returns a list of DIRECT servernames for a specific channel */
195 void SpanningTreeUtilities::GetListOfServersForChannel(Channel* c, TreeServerList &list, char status, const CUList &exempt_list)
197 const UserMembList *ulist = c->GetUsers();
199 for (UserMembCIter i = ulist->begin(); i != ulist->end(); i++)
201 if (IS_LOCAL(i->first))
204 if (status && !strchr(c->GetAllPrefixChars(i->first), status))
207 if (exempt_list.find(i->first) == exempt_list.end())
209 TreeServer* best = this->BestRouteTo(i->first->server);
211 AddThisServer(best,list);
217 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, parameterlist ¶ms)
220 TreeServer* omitroute = this->BestRouteTo(omit);
221 if ((command == "NOTICE") || (command == "PRIVMSG"))
223 if (params.size() >= 2)
226 if (ServerInstance->Modes->FindPrefix(params[0][0]))
229 params[0] = params[0].substr(1, params[0].length()-1);
231 if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
233 // special routing for private messages/notices
234 User* d = ServerInstance->FindNick(params[0]);
238 par.push_back(params[0]);
239 par.push_back(":"+params[1]);
240 this->DoOneToOne(prefix,command.c_str(),par,d->server);
244 else if (*(params[0].c_str()) == '$')
247 par.push_back(params[0]);
248 par.push_back(":"+params[1]);
249 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
254 Channel* c = ServerInstance->FindChan(params[0]);
255 User* u = ServerInstance->FindNick(prefix);
260 FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist, params[1]));
261 GetListOfServersForChannel(c,list,pfx,elist);
263 for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
265 TreeSocket* Sock = i->second->GetSocket();
266 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
268 Sock->WriteLine(data);
276 unsigned int items =this->TreeRoot->ChildCount();
277 for (unsigned int x = 0; x < items; x++)
279 TreeServer* Route = this->TreeRoot->GetChild(x);
280 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
282 TreeSocket* Sock = Route->GetSocket();
284 Sock->WriteLine(data);
290 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, parameterlist ¶ms, std::string omit)
292 TreeServer* omitroute = this->BestRouteTo(omit);
293 std::string FullLine = ":" + prefix + " " + command;
294 unsigned int words = params.size();
295 for (unsigned int x = 0; x < words; x++)
297 FullLine = FullLine + " " + params[x];
299 unsigned int items = this->TreeRoot->ChildCount();
300 for (unsigned int x = 0; x < items; x++)
302 TreeServer* Route = this->TreeRoot->GetChild(x);
304 // The route has a socket (its a direct connection)
305 // The route isnt the one to be omitted
306 // The route isnt the path to the one to be omitted
307 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
309 TreeSocket* Sock = Route->GetSocket();
311 Sock->WriteLine(FullLine);
317 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, parameterlist ¶ms)
319 std::string FullLine = ":" + prefix + " " + command;
320 unsigned int words = params.size();
321 for (unsigned int x = 0; x < words; x++)
323 FullLine = FullLine + " " + params[x];
325 unsigned int items = this->TreeRoot->ChildCount();
326 for (unsigned int x = 0; x < items; x++)
328 TreeServer* Route = this->TreeRoot->GetChild(x);
329 if (Route && Route->GetSocket())
331 TreeSocket* Sock = Route->GetSocket();
333 Sock->WriteLine(FullLine);
339 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, parameterlist ¶ms)
341 std::string spfx = prefix;
342 std::string scmd = command;
343 return this->DoOneToMany(spfx, scmd, params);
346 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, parameterlist ¶ms, std::string omit)
348 std::string spfx = prefix;
349 std::string scmd = command;
350 return this->DoOneToAllButSender(spfx, scmd, params, omit);
353 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, parameterlist ¶ms, std::string target)
355 TreeServer* Route = this->BestRouteTo(target);
358 std::string FullLine = ":" + prefix + " " + command;
359 unsigned int words = params.size();
360 for (unsigned int x = 0; x < words; x++)
362 FullLine = FullLine + " " + params[x];
364 if (Route && Route->GetSocket())
366 TreeSocket* Sock = Route->GetSocket();
368 Sock->WriteLine(FullLine);
378 void SpanningTreeUtilities::RefreshIPCache()
381 for (std::vector<Link>::iterator L = LinkBlocks.begin(); L != LinkBlocks.end(); L++)
383 if (L->IPAddr.empty() || L->RecvPass.empty() || L->SendPass.empty() || L->Name.empty() || !L->Port)
387 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"m_spanningtree: Ignoring a malformed link block (all link blocks require a name!)");
391 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"m_spanningtree: Ignoring a link block missing recvpass, sendpass, port or ipaddr.");
394 /* Invalid link block */
398 ValidIPs.push_back(L->IPAddr);
400 if (L->AllowMask.length())
401 ValidIPs.push_back(L->AllowMask);
403 /* Needs resolving */
405 QueryType start_type = DNS_QUERY_A;
406 start_type = DNS_QUERY_AAAA;
407 if (strchr(L->IPAddr.c_str(),':'))
410 if (inet_pton(AF_INET6, L->IPAddr.c_str(), &n) < 1)
416 if (inet_aton(L->IPAddr.c_str(),&n) < 1)
425 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L->IPAddr, *L, cached, start_type);
426 ServerInstance->AddResolver(sr, cached);
435 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
437 ConfigReader* Conf = new ConfigReader(ServerInstance);
439 /* We don't need to worry about these being *unloaded* on the fly, only loaded,
440 * because we 'use' the interface locking the module in memory.
444 modulelist* ml = ServerInstance->Modules->FindInterface("BufferedSocketHook");
446 /* Did we find any modules? */
449 /* Yes, enumerate them all to find out the hook name */
450 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
452 /* Make a request to it for its name, its implementing
453 * BufferedSocketHook so we know its safe to do this
455 std::string name = BufferedSocketNameRequest((Module*)Creator, *m).Send();
456 /* Build a map of them */
457 hooks[name.c_str()] = *m;
458 hooknames.push_back(name);
464 for (unsigned int i = 0; i < Bindings.size(); i++)
468 ServerInstance->BufferedSocketCull();
471 for (int j = 0; j < Conf->Enumerate("bind"); j++)
473 std::string Type = Conf->ReadValue("bind","type",j);
474 std::string IP = Conf->ReadValue("bind","address",j);
475 std::string Port = Conf->ReadValue("bind","port",j);
476 std::string transport = Conf->ReadValue("bind","transport",j);
477 if (Type == "servers")
479 irc::portparser portrange(Port, false);
485 while ((portno = portrange.GetToken()))
487 if ((!transport.empty()) && (hooks.find(transport.c_str()) == hooks.end()))
489 throw CoreException("Can't find transport type '"+transport+"' for port "+IP+":"+Port+" - maybe you forgot to load it BEFORE m_spanningtree in your config file?");
493 ServerSocketListener *listener = new ServerSocketListener(ServerInstance, this, portno, (char *)IP.c_str());
494 if (listener->GetFd() == -1)
500 if (!transport.empty())
501 listener->AddIOHook(hooks[transport.c_str()]);
503 Bindings.push_back(listener);
508 FlatLinks = Conf->ReadFlag("security","flatlinks",0);
509 HideULines = Conf->ReadFlag("security","hideulines",0);
510 AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
511 AllowOptCommon = Conf->ReadFlag("options", "allowmismatch", 0);
512 ChallengeResponse = !Conf->ReadFlag("security", "disablehmac", 0);
513 quiet_bursts = Conf->ReadFlag("performance", "quietbursts", 0);
514 PingWarnTime = Conf->ReadInteger("options", "pingwarning", 0, true);
515 PingFreq = Conf->ReadInteger("options", "serverpingfreq", 0, true);
520 if (PingWarnTime < 0 || PingWarnTime > PingFreq - 1)
525 for (int j = 0; j < Conf->Enumerate("link"); j++)
528 std::string Allow = Conf->ReadValue("link", "allowmask", j);
529 L.Name = (Conf->ReadValue("link", "name", j)).c_str();
531 L.IPAddr = Conf->ReadValue("link", "ipaddr", j);
532 L.FailOver = Conf->ReadValue("link", "failover", j).c_str();
533 L.Port = Conf->ReadInteger("link", "port", j, true);
534 L.SendPass = Conf->ReadValue("link", "sendpass", j);
535 L.RecvPass = Conf->ReadValue("link", "recvpass", j);
536 L.Fingerprint = Conf->ReadValue("link", "fingerprint", j);
537 L.AutoConnect = Conf->ReadInteger("link", "autoconnect", j, true);
538 L.HiddenFromStats = Conf->ReadFlag("link", "statshidden", j);
539 L.Timeout = Conf->ReadInteger("link", "timeout", j, true);
540 L.Hook = Conf->ReadValue("link", "transport", j);
541 L.Bind = Conf->ReadValue("link", "bind", j);
542 L.Hidden = Conf->ReadFlag("link", "hidden", j);
544 if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) == hooks.end()))
546 throw CoreException("Can't find transport type '"+L.Hook+"' for link '"+assign(L.Name)+"' - maybe you forgot to load it BEFORE m_spanningtree in your config file? Skipping <link> tag completely.");
551 // Fix: Only trip autoconnects if this wouldn't delay autoconnect..
552 if (L.NextConnectTime > ((time_t)(ServerInstance->Time() + L.AutoConnect)))
553 L.NextConnectTime = ServerInstance->Time() + L.AutoConnect;
555 if (L.Name.find('.') == std::string::npos)
556 throw CoreException("The link name '"+assign(L.Name)+"' is invalid and must contain at least one '.' character");
558 if (L.Name.length() > 64)
559 throw CoreException("The link name '"+assign(L.Name)+"' is longer than 64 characters!");
561 if ((!L.IPAddr.empty()) && (!L.RecvPass.empty()) && (!L.SendPass.empty()) && (!L.Name.empty()) && (L.Port))
564 ValidIPs.push_back(Allow);
566 ValidIPs.push_back(L.IPAddr);
568 /* Needs resolving */
570 QueryType start_type = DNS_QUERY_A;
571 start_type = DNS_QUERY_AAAA;
572 if (strchr(L.IPAddr.c_str(),':'))
575 if (inet_pton(AF_INET6, L.IPAddr.c_str(), &n) < 1)
581 if (inet_aton(L.IPAddr.c_str(),&n) < 1)
590 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L, cached, start_type);
591 ServerInstance->AddResolver(sr, cached);
600 if (L.IPAddr.empty())
603 ValidIPs.push_back("*");
604 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"Configuration warning: Link block " + assign(L.Name) + " has no IP defined! This will allow any IP to connect as this server, and MAY not be what you want.");
607 if (L.RecvPass.empty())
609 throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', recvpass not defined!");
612 if (L.SendPass.empty())
614 throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', sendpass not defined!");
619 throw CoreException("Invalid configuration, link tag without a name! IP address: "+L.IPAddr);
624 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"Configuration warning: Link block " + assign(L.Name) + " has no port defined, you will not be able to /connect it.");
628 LinkBlocks.push_back(L);
633 void SpanningTreeUtilities::DoFailOver(Link* x)
635 if (x->FailOver.length())
637 if (x->FailOver == x->Name)
639 this->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());
642 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
645 TreeServer* CheckDupe = this->FindServer(x->FailOver.c_str());
648 ServerInstance->Logs->Log("m_spanningtree",DEBUG,"Skipping existing failover: %s", x->FailOver.c_str());
652 this->ServerInstance->SNO->WriteToSnoMask('l', "FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
653 Creator->ConnectServer(TryThisOne);
658 this->ServerInstance->SNO->WriteToSnoMask('l', "FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
663 Link* SpanningTreeUtilities::FindLink(const std::string& name)
665 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x != LinkBlocks.end(); x++)
667 if (InspIRCd::Match(x->Name.c_str(), name.c_str()))