1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2008 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/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"
22 #include "m_spanningtree/main.h"
23 #include "m_spanningtree/utils.h"
24 #include "m_spanningtree/treeserver.h"
25 #include "m_spanningtree/link.h"
26 #include "m_spanningtree/treesocket.h"
27 #include "m_spanningtree/resolvers.h"
28 #include "m_spanningtree/handshaketimer.h"
30 /* $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 m_spanningtree/handshaketimer.h */
32 void TreeSocket::WriteLine(std::string line)
34 ServerInstance->Logs->Log("m_spanningtree",DEBUG, "S[%d] O %s", this->GetFd(), line.c_str());
40 /* Handle ERROR command */
41 bool TreeSocket::Error(std::deque<std::string> ¶ms)
43 if (params.size() < 1)
45 this->ServerInstance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(!InboundServerName.empty() ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
46 /* we will return false to cause the socket to close. */
50 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
53 irc::tokenstream tokens(line);
55 while (tokens.GetToken(param))
62 bool TreeSocket::ProcessLine(std::string &line)
64 std::deque<std::string> params;
68 line = line.substr(0, line.find_first_of("\r\n"));
73 ServerInstance->Logs->Log("m_spanningtree",DEBUG, "S[%d] I %s", this->GetFd(), line.c_str());
75 this->Split(line.c_str(),params);
80 if ((params[0][0] == ':') && (params.size() > 1))
82 prefix = params[0].substr(1);
87 this->SendError("BUG (?) Empty prefix recieved.");
92 command = params[0].c_str();
95 switch (this->LinkState)
102 * Waiting for SERVER command from remote server. Server initiating
103 * the connection sends the first SERVER command, listening server
104 * replies with theirs if its happy, then if the initiator is happy,
105 * it starts to send its net sync, which starts the merge, otherwise
108 if (command == "PASS")
111 * Ignore this silently. Some services packages insist on sending PASS, even
112 * when it is not required (i.e. by us). We have to ignore this here, otherwise
113 * as it's an unknown command (effectively), it will cause the connection to be
114 * closed, which probably isn't what people want. -- w00t
117 else if (command == "SERVER")
119 return this->Inbound_Server(params);
121 else if (command == "ERROR")
123 return this->Error(params);
125 else if (command == "USER")
127 this->SendError("Client connections to this port are prohibited.");
130 else if (command == "CAPAB")
132 return this->Capab(params);
137 irc::string error = "Invalid command in negotiation phase: " + command;
138 this->SendError(assign(error));
145 * We have sent SERVER to the other side of the connection. Now we're waiting for them to start BURST.
146 * The other option at this stage of things, of course, is for them to close our connection thanks
147 * to invalid credentials.. -- w
149 if (command == "SERVER")
152 * Connection is either attempting to re-auth itself (stupid) or sending netburst without sending BURST.
153 * Both of these aren't allowable, so block them here. -- w
155 this->SendError("You may not re-authenticate or commence netburst without sending BURST.");
158 else if (command == "BURST")
162 time_t them = atoi(params[0].c_str());
163 time_t delta = them - ServerInstance->Time();
164 if ((delta < -600) || (delta > 600))
166 ServerInstance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than five minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs((long)delta));
167 SendError("Your clocks are out by "+ConvToStr(abs((long)delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
170 else if ((delta < -30) || (delta > 30))
172 ServerInstance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs((long)delta));
175 this->LinkState = CONNECTED;
177 Utils->timeoutlist.erase(this);
179 Link* lnk = Utils->FindLink(InboundServerName);
181 Node = new TreeServer(this->Utils, this->ServerInstance, InboundServerName, InboundDescription, InboundSID, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
183 if (Node->DuplicateID())
185 this->SendError("Server ID "+InboundSID+" already exists on the network!");
186 this->ServerInstance->SNO->WriteToSnoMask('l',"Server \2"+InboundServerName+"\2 being introduced from \2" + prefix + "\2 denied, server ID already exists on the network. Closing link.");
190 Utils->TreeRoot->AddChild(Node);
192 params.push_back(InboundServerName);
193 params.push_back("*");
194 params.push_back("1");
195 params.push_back(InboundSID);
196 params.push_back(":"+InboundDescription);
197 Utils->DoOneToAllButSender(ServerInstance->Config->GetSID(),"SERVER",params,InboundServerName);
198 Node->bursting = true;
201 else if (command == "ERROR")
203 return this->Error(params);
205 else if (command == "CAPAB")
207 return this->Capab(params);
214 * We're connecting (OUTGOING) to another server. They are in state WAIT_AUTH_1 until they verify
215 * our credentials, when they proceed into WAIT_AUTH_2 and send SERVER to us. We then send BURST
216 * + our netburst, which will put them into CONNECTED state. -- w
218 if (command == "SERVER")
220 // Our credentials have been accepted, send netburst. (this puts US into the CONNECTED state)
221 return this->Outbound_Reply_Server(params);
223 else if (command == "ERROR")
225 return this->Error(params);
227 else if (command == "CAPAB")
229 return this->Capab(params);
235 * Credentials have been exchanged, we've gotten their 'BURST' (or sent ours).
236 * Anything from here on should be accepted a little more reasonably.
241 * Check for fake direction here, and drop any instances that are found.
242 * What is fake direction? Imagine the following server setup:
243 * 0AA <-> 0AB <-> 0AC
244 * Fake direction would be 0AC sending a message to 0AB claiming to be from
245 * 0AA, or something similar. Basically, a message taking a path that *cannot*
248 * When would this be seen?
249 * Well, hopefully never. It could be caused by race conditions, bugs, or
250 * "miscreant" servers, though, so let's check anyway. -- w
252 std::string direction = prefix;
254 User *t = this->ServerInstance->FindUUID(prefix);
257 direction = t->server;
260 TreeServer* route_back_again = Utils->BestRouteTo(direction);
261 if ((!route_back_again) || (route_back_again->GetSocket() != this))
263 if (route_back_again)
264 ServerInstance->Logs->Log("m_spanningtree",DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
268 * When there is activity on the socket, reset the ping counter so
269 * that we're not wasting bandwidth pinging an active server.
271 route_back_again->SetNextPingTime(ServerInstance->Time() + Utils->PingFreq);
272 route_back_again->SetPingFlag();
277 * Empty prefix from a server to server link:
278 * This is somewhat bad/naughty, so let's set the prefix
279 * to be the link that we got it from, so we don't break anything. -- w
281 TreeServer* n = Utils->FindServer(GetName());
289 * First up, check for any malformed commands (e.g. MODE without a timestamp)
290 * and rewrite commands where necessary (SVSMODE -> MODE for services). -- w
292 if (command == "SVSMODE") // This isn't in an "else if" so we still force FMODE for changes on channels.
296 * Now, check for (and parse) commands as appropriate. -- w
299 /* Find the server that this command originated from, used in the handlers below */
300 TreeServer *ServerSource = Utils->FindServer(prefix);
302 /* Find the link we just got this from so we don't bounce it back incorrectly */
303 std::string sourceserv = this->myhost;
304 if (!this->InboundServerName.empty())
306 sourceserv = this->InboundServerName;
310 * XXX one of these days, this needs to be moved into class Commands.
312 if (command == "UID")
314 return this->ParseUID(prefix, params);
316 else if (command == "FJOIN")
318 return this->ForceJoin(prefix,params);
320 else if ((command == "NOTICE" || command == "PRIVMSG") && (Utils->IsServer(prefix)))
322 return this->ServerMessage(assign(command), prefix, params, sourceserv);
324 else if (command == "STATS")
326 return this->Stats(prefix, params);
328 else if (command == "MOTD")
330 return this->Motd(prefix, params);
332 else if (command == "KILL" && ServerSource)
334 // Kill from a server
335 return this->RemoteKill(prefix,params);
337 else if (command == "MODULES")
339 return this->Modules(prefix, params);
341 else if (command == "ADMIN")
343 return this->Admin(prefix, params);
345 else if (command == "MAP")
347 User* user = ServerInstance->FindNick(prefix);
350 std::vector<std::string> p(params.begin(), params.end());
351 return Utils->Creator->HandleMap(p, user);
354 else if (command == "SERVER")
356 return this->RemoteServer(prefix,params);
358 else if (command == "ERROR")
360 return this->Error(params);
362 else if (command == "OPERTYPE")
364 return this->OperType(prefix,params);
366 else if (command == "FMODE")
368 return this->ForceMode(prefix,params);
370 else if (command == "FTOPIC")
372 return this->ForceTopic(prefix,params);
374 else if (command == "METADATA")
376 return this->MetaData(prefix,params);
378 else if (command == "PING")
380 return this->LocalPing(prefix,params);
382 else if (command == "PONG")
384 TreeServer *s = Utils->FindServer(prefix);
385 if (s && s->bursting)
387 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 has not finished burst, forcing end of burst (send ENDBURST!)", prefix.c_str());
390 return this->LocalPong(prefix,params);
392 else if (command == "VERSION")
394 return this->ServerVersion(prefix,params);
396 else if (command == "FHOST")
398 return this->ChangeHost(prefix,params);
400 else if (command == "FNAME")
402 return this->ChangeName(prefix,params);
404 else if (command == "ADDLINE")
406 return this->AddLine(prefix,params);
408 else if (command == "DELLINE")
410 return this->DelLine(prefix,params);
412 else if (command == "SVSNICK")
414 return this->ForceNick(prefix,params);
416 else if (command == "OPERQUIT")
418 return this->OperQuit(prefix,params);
420 else if (command == "IDLE")
422 return this->Whois(prefix,params);
424 else if (command == "PUSH")
426 return this->Push(prefix,params);
428 else if (command == "TIME")
430 return this->Time(prefix,params);
432 else if ((command == "KICK") && (Utils->IsServer(prefix)))
434 if (params.size() == 3)
436 TreeServer* pf = Utils->FindServer(prefix);
437 User* user = this->ServerInstance->FindNick(params[1]);
438 Channel* chan = this->ServerInstance->FindChan(params[0]);
439 if (pf && user && chan)
441 if (!chan->ServerKickUser(user, params[2].c_str(), false, pf->GetName().c_str()))
442 /* Yikes, the channels gone! */
447 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
449 else if (command == "SVSJOIN")
451 return this->ServiceJoin(prefix,params);
453 else if (command == "SVSPART")
455 return this->ServicePart(prefix,params);
457 else if (command == "SQUIT")
459 if (params.size() == 2)
461 this->Squit(Utils->FindServer(params[0]),params[1]);
465 else if (command == "MODENOTICE")
467 if (params.size() >= 2)
470 ServerInstance->Users->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", (ServerSource ? ServerSource->GetName().c_str() : prefix.c_str()), params[1].c_str());
472 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
474 else if (command == "SNONOTICE")
476 if (params.size() >= 2)
478 ServerInstance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + (ServerSource ? ServerSource->GetName().c_str() : prefix) + ": "+ params[1]);
479 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
483 else if (command == "BURST")
485 // Set prefix server as bursting
488 this->ServerInstance->SNO->WriteToSnoMask('l', "WTF: Got BURST from a nonexistant server(?): %s", (ServerSource ? ServerSource->GetName().c_str() : prefix.c_str()));
492 ServerSource->bursting = true;
493 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
495 else if (command == "ENDBURST")
499 this->ServerInstance->SNO->WriteToSnoMask('l', "WTF: Got ENDBURST from a nonexistant server(?): %s", (ServerSource ? ServerSource->GetName().c_str() : prefix.c_str()));
503 ServerSource->FinishBurst();
504 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
506 else if (command == "ENCAP")
508 return this->Encap(prefix, params);
510 else if (command == "MODE" && !this->ServerInstance->FindUUID(prefix)) // XXX we should check for no such serv?
512 // Server-prefix MODE.
513 std::vector<std::string> modelist(params.begin(), params.end());
515 /* We don't support this for channel mode changes any more! */
516 if (params.size() >= 1)
518 if (ServerInstance->FindChan(params[0]))
520 this->SendError("Protocol violation by '"+(ServerSource ? ServerSource->GetName().c_str() : prefix)+"'! MODE for channel mode changes is not supported by the InspIRCd 1.2 protocol. You must use FMODE to preserve channel timestamps.");
525 // Insert into the parser
526 this->ServerInstance->SendMode(modelist, this->ServerInstance->FakeClient);
528 // Pass out to the network
529 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
534 * Not a special s2s command. Emulate the user doing it.
535 * This saves us having a huge ugly command parser again.
537 User* who = this->ServerInstance->FindUUID(prefix);
541 /* this looks ugly because command is an irc::string
542 * It is important that we dont close the link here, unknown prefix can occur
543 * due to various race conditions such as the KILL message for a user somehow
544 * crossing the users QUIT further upstream from the server. Thanks jilles!
546 ServerInstance->Logs->Log("m_spanningtree", DEBUG, "Command " + std::string(command.c_str()) + " from unknown prefix " + prefix + "! Dropping entire command.");
550 if (command == "NICK")
552 if (params.size() != 2)
554 SendError("Protocol violation: NICK message without TS - :"+std::string(who->uuid)+" NICK "+params[0]);
557 /* Update timestamp on user when they change nicks */
558 who->age = atoi(params[1].c_str());
561 * On nick messages, check that the nick doesnt already exist here.
562 * If it does, perform collision logic.
564 User* x = this->ServerInstance->FindNickOnly(params[0]);
565 if ((x) && (x != who))
568 /* x is local, who is remote */
569 collideret = this->DoCollision(x, who->age, who->ident, who->GetIPString(), who->uuid);
573 * Remote client lost, or both lost, parsing this nickchange would be
574 * pointless, as the incoming client's server will soon recieve SVSNICK to
575 * change its nick to its UID. :) -- w00t
583 std::vector<std::string> strparams(params.begin(), params.end());
585 switch (this->ServerInstance->CallCommandHandler(command.c_str(), strparams, who))
589 * XXX: command is irc::string, hence ugliness
591 this->SendError("Unrecognised or malformed command '" + std::string(command.c_str()) + "' -- possibly loaded mismatched modules");
596 * CMD_LOCALONLY is aliased to CMD_FAILURE, so this won't go out onto the network.
601 /* CMD_SUCCESS falls through here */
605 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
609 break; // end of state CONNECTED (phew).
614 std::string TreeSocket::GetName()
616 std::string sourceserv = this->myhost;
617 if (!this->InboundServerName.empty())
619 sourceserv = this->InboundServerName;
624 void TreeSocket::OnTimeout()
626 if (this->LinkState == CONNECTING)
628 Utils->Creator->RemoteMessage(NULL, "CONNECT: Connection to \002%s\002 timed out.", myhost.c_str());
629 Link* MyLink = Utils->FindLink(myhost);
631 Utils->DoFailOver(MyLink);
635 void TreeSocket::OnClose()
637 // Test fix for big fuckup
638 if (this->LinkState != CONNECTED)
641 // Connection closed.
642 // If the connection is fully up (state CONNECTED)
643 // then propogate a netsplit to all peers.
644 std::string quitserver = this->myhost;
645 if (!this->InboundServerName.empty())
647 quitserver = this->InboundServerName;
649 TreeServer* s = Utils->FindServer(quitserver);
652 Squit(s,"Remote host closed the connection");
655 if (!quitserver.empty())
657 Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' failed.",quitserver.c_str());
658 time_t server_uptime = ServerInstance->Time() - this->age;
660 Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());