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 * ---------------------------------------------------
15 #include "commands/cmd_whois.h"
16 #include "commands/cmd_stats.h"
19 #include "../transport.h"
20 #include "socketengine.h"
24 #include "treeserver.h"
26 #include "treesocket.h"
27 #include "resolvers.h"
29 /* $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 */
31 /* Create server sockets off a listener. */
32 void ServerSocketListener::OnAcceptReady(const std::string &ipconnectedto, int newsock, const std::string &incomingip)
35 char *ip = (char *)incomingip.c_str(); // XXX ugly cast
37 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
40 for (std::vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
42 if (*i == "*" || irc::sockets::MatchCIDR(ip, *i))
51 this->ServerInstance->SNO->WriteToSnoMask('l', "Server connection from %s denied (no link blocks with that IP address)", ip);
52 ServerInstance->SE->Close(newsock);
57 if (this->GetIOHook())
59 this->GetIOHook()->OnRawSocketAccept(newsock, &client, &server);
62 /* we don't need a pointer to this, creating it stores it in the necessary places */
63 new TreeSocket(this->Utils, this->ServerInstance, newsock, ip, this->GetIOHook());
67 /** Yay for fast searches!
68 * This is hundreds of times faster than recursion
69 * or even scanning a linked list, especially when
70 * there are more than a few servers to deal with.
73 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
75 if (this->ServerInstance->IsSID(ServerName))
76 return this->FindServerID(ServerName);
78 server_hash::iterator iter = serverlist.find(ServerName.c_str());
79 if (iter != serverlist.end())
89 /** Returns the locally connected server we must route a
90 * message through to reach server 'ServerName'. This
91 * only applies to one-to-one and not one-to-many routing.
92 * See the comments for the constructor of TreeServer
95 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
97 if (ServerName.c_str() == TreeRoot->GetName() || ServerName == ServerInstance->Config->GetSID())
99 TreeServer* Found = FindServer(ServerName);
102 return Found->GetRoute();
106 // Cheat a bit. This allows for (better) working versions of routing commands with nick based prefixes, without hassle
107 User *u = ServerInstance->FindNick(ServerName);
110 Found = FindServer(u->server);
112 return Found->GetRoute();
119 /** Find the first server matching a given glob mask.
120 * Theres no find-using-glob method of hash_map [awwww :-(]
121 * so instead, we iterate over the list using an iterator
122 * and match each one until we get a hit. Yes its slow,
125 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
127 for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
129 if (InspIRCd::Match(i->first,ServerName))
135 TreeServer* SpanningTreeUtilities::FindServerID(const std::string &id)
137 server_hash::iterator iter = sidlist.find(id);
138 if (iter != sidlist.end())
144 /* A convenient wrapper that returns true if a server exists */
145 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
147 return (FindServer(ServerName) != NULL);
150 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
154 ServerInstance->Logs->Log("m_spanningtree",DEBUG,"***** Using SID for hash: %s *****", ServerInstance->Config->GetSID().c_str());
156 this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc, ServerInstance->Config->GetSID());
157 this->ServerUser = new FakeUser(ServerInstance, TreeRoot->GetID());
159 this->ReadConfiguration(true);
162 SpanningTreeUtilities::~SpanningTreeUtilities()
164 for (unsigned int i = 0; i < Bindings.size(); i++)
169 while (TreeRoot->ChildCount())
171 TreeServer* child_server = TreeRoot->GetChild(0);
174 TreeSocket* sock = child_server->GetSocket();
175 ServerInstance->SE->DelFd(sock);
180 // This avoids a collision on reload
181 ServerUser->uuid = TreeRoot->GetID();
184 ServerInstance->BufferedSocketCull();
187 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
189 if (list.find(server) == list.end())
190 list[server] = server;
193 /* returns a list of DIRECT servernames for a specific channel */
194 void SpanningTreeUtilities::GetListOfServersForChannel(Channel* c, TreeServerList &list, char status, const CUList &exempt_list)
196 CUList *ulist = c->GetUsers();
198 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
200 if (IS_LOCAL(i->first))
203 if (status && !strchr(c->GetAllPrefixChars(i->first), status))
206 if (exempt_list.find(i->first) == exempt_list.end())
208 TreeServer* best = this->BestRouteTo(i->first->server);
210 AddThisServer(best,list);
216 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> ¶ms)
219 TreeServer* omitroute = this->BestRouteTo(omit);
220 if ((command == "NOTICE") || (command == "PRIVMSG"))
222 if (params.size() >= 2)
225 if (ServerInstance->Modes->FindPrefix(params[0][0]))
228 params[0] = params[0].substr(1, params[0].length()-1);
230 if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
232 // special routing for private messages/notices
233 User* d = ServerInstance->FindNick(params[0]);
236 std::deque<std::string> par;
237 par.push_back(params[0]);
238 par.push_back(":"+params[1]);
239 this->DoOneToOne(prefix,command.c_str(),par,d->server);
243 else if (*(params[0].c_str()) == '$')
245 std::deque<std::string> par;
246 par.push_back(params[0]);
247 par.push_back(":"+params[1]);
248 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
253 Channel* c = ServerInstance->FindChan(params[0]);
254 User* u = ServerInstance->FindNick(prefix);
259 FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist, params[1]));
260 GetListOfServersForChannel(c,list,pfx,elist);
262 for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
264 TreeSocket* Sock = i->second->GetSocket();
265 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
267 Sock->WriteLine(data);
275 unsigned int items =this->TreeRoot->ChildCount();
276 for (unsigned int x = 0; x < items; x++)
278 TreeServer* Route = this->TreeRoot->GetChild(x);
279 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
281 TreeSocket* Sock = Route->GetSocket();
283 Sock->WriteLine(data);
289 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms, std::string omit)
291 TreeServer* omitroute = this->BestRouteTo(omit);
292 std::string FullLine = ":" + prefix + " " + command;
293 unsigned int words = params.size();
294 for (unsigned int x = 0; x < words; x++)
296 FullLine = FullLine + " " + params[x];
298 unsigned int items = this->TreeRoot->ChildCount();
299 for (unsigned int x = 0; x < items; x++)
301 TreeServer* Route = this->TreeRoot->GetChild(x);
303 // The route has a socket (its a direct connection)
304 // The route isnt the one to be omitted
305 // The route isnt the path to the one to be omitted
306 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
308 TreeSocket* Sock = Route->GetSocket();
310 Sock->WriteLine(FullLine);
316 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms)
318 std::string FullLine = ":" + prefix + " " + command;
319 unsigned int words = params.size();
320 for (unsigned int x = 0; x < words; x++)
322 FullLine = FullLine + " " + params[x];
324 unsigned int items = this->TreeRoot->ChildCount();
325 for (unsigned int x = 0; x < items; x++)
327 TreeServer* Route = this->TreeRoot->GetChild(x);
328 if (Route && Route->GetSocket())
330 TreeSocket* Sock = Route->GetSocket();
332 Sock->WriteLine(FullLine);
338 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> ¶ms)
340 std::string spfx = prefix;
341 std::string scmd = command;
342 return this->DoOneToMany(spfx, scmd, params);
345 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> ¶ms, std::string omit)
347 std::string spfx = prefix;
348 std::string scmd = command;
349 return this->DoOneToAllButSender(spfx, scmd, params, omit);
352 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms, std::string target)
354 TreeServer* Route = this->BestRouteTo(target);
357 std::string FullLine = ":" + prefix + " " + command;
358 unsigned int words = params.size();
359 for (unsigned int x = 0; x < words; x++)
361 FullLine = FullLine + " " + params[x];
363 if (Route && Route->GetSocket())
365 TreeSocket* Sock = Route->GetSocket();
367 Sock->WriteLine(FullLine);
377 void SpanningTreeUtilities::RefreshIPCache()
380 for (std::vector<Link>::iterator L = LinkBlocks.begin(); L != LinkBlocks.end(); L++)
382 if (L->IPAddr.empty() || L->RecvPass.empty() || L->SendPass.empty() || L->Name.empty() || !L->Port)
386 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"m_spanningtree: Ignoring a malformed link block (all link blocks require a name!)");
390 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"m_spanningtree: Ignoring a link block missing recvpass, sendpass, port or ipaddr.");
393 /* Invalid link block */
397 ValidIPs.push_back(L->IPAddr);
399 if (L->AllowMask.length())
400 ValidIPs.push_back(L->AllowMask);
402 /* Needs resolving */
404 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)
417 if (inet_aton(L->IPAddr.c_str(),&n) < 1)
426 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L->IPAddr, *L, cached, start_type);
427 ServerInstance->AddResolver(sr, cached);
436 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
438 ConfigReader* Conf = new ConfigReader(ServerInstance);
440 /* We don't need to worry about these being *unloaded* on the fly, only loaded,
441 * because we 'use' the interface locking the module in memory.
445 modulelist* ml = ServerInstance->Modules->FindInterface("BufferedSocketHook");
447 /* Did we find any modules? */
450 /* Yes, enumerate them all to find out the hook name */
451 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
453 /* Make a request to it for its name, its implementing
454 * BufferedSocketHook so we know its safe to do this
456 std::string name = BufferedSocketNameRequest((Module*)Creator, *m).Send();
457 /* Build a map of them */
458 hooks[name.c_str()] = *m;
459 hooknames.push_back(name);
465 for (unsigned int i = 0; i < Bindings.size(); i++)
469 ServerInstance->BufferedSocketCull();
472 for (int j = 0; j < Conf->Enumerate("bind"); j++)
474 std::string Type = Conf->ReadValue("bind","type",j);
475 std::string IP = Conf->ReadValue("bind","address",j);
476 std::string Port = Conf->ReadValue("bind","port",j);
477 std::string transport = Conf->ReadValue("bind","transport",j);
478 if (Type == "servers")
480 irc::portparser portrange(Port, false);
486 while ((portno = portrange.GetToken()))
488 if ((!transport.empty()) && (hooks.find(transport.c_str()) == hooks.end()))
490 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?");
494 ServerSocketListener *listener = new ServerSocketListener(ServerInstance, this, portno, (char *)IP.c_str());
495 if (listener->GetFd() == -1)
501 if (!transport.empty())
502 listener->AddIOHook(hooks[transport.c_str()]);
504 Bindings.push_back(listener);
509 FlatLinks = Conf->ReadFlag("security","flatlinks",0);
510 HideULines = Conf->ReadFlag("security","hideulines",0);
511 AnnounceTSChange = Conf->ReadFlag("options","announcets",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;
572 start_type = DNS_QUERY_AAAA;
573 if (strchr(L.IPAddr.c_str(),':'))
576 if (inet_pton(AF_INET6, L.IPAddr.c_str(), &n) < 1)
582 if (inet_aton(L.IPAddr.c_str(),&n) < 1)
587 if (inet_aton(L.IPAddr.c_str(),&n) < 1)
596 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L, cached, start_type);
597 ServerInstance->AddResolver(sr, cached);
606 if (L.IPAddr.empty())
609 ValidIPs.push_back("*");
610 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.");
613 if (L.RecvPass.empty())
615 throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', recvpass not defined!");
618 if (L.SendPass.empty())
620 throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', sendpass not defined!");
625 throw CoreException("Invalid configuration, link tag without a name! IP address: "+L.IPAddr);
630 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.");
634 LinkBlocks.push_back(L);
639 void SpanningTreeUtilities::DoFailOver(Link* x)
641 if (x->FailOver.length())
643 if (x->FailOver == x->Name)
645 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());
648 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
651 TreeServer* CheckDupe = this->FindServer(x->FailOver.c_str());
654 ServerInstance->Logs->Log("m_spanningtree",DEBUG,"Skipping existing failover: %s", x->FailOver.c_str());
658 this->ServerInstance->SNO->WriteToSnoMask('l', "FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
659 Creator->ConnectServer(TryThisOne);
664 this->ServerInstance->SNO->WriteToSnoMask('l', "FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
669 Link* SpanningTreeUtilities::FindLink(const std::string& name)
671 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x != LinkBlocks.end(); x++)
673 if (InspIRCd::Match(x->Name.c_str(), name.c_str()))