1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 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 Utils->TreeRoot->AddChild(Node);
185 params.push_back(InboundServerName);
186 params.push_back("*");
187 params.push_back("1");
188 params.push_back(InboundSID);
189 params.push_back(":"+InboundDescription);
190 Utils->DoOneToAllButSender(ServerInstance->Config->GetSID(),"SERVER",params,InboundServerName);
191 Node->bursting = true;
194 else if (command == "ERROR")
196 return this->Error(params);
198 else if (command == "CAPAB")
200 return this->Capab(params);
207 * We're connecting (OUTGOING) to another server. They are in state WAIT_AUTH_1 until they verify
208 * our credentials, when they proceed into WAIT_AUTH_2 and send SERVER to us. We then send BURST
209 * + our netburst, which will put them into CONNECTED state. -- w
211 if (command == "SERVER")
213 // Our credentials have been accepted, send netburst. (this puts US into the CONNECTED state)
214 return this->Outbound_Reply_Server(params);
216 else if (command == "ERROR")
218 return this->Error(params);
220 else if (command == "CAPAB")
222 return this->Capab(params);
228 * Credentials have been exchanged, we've gotten their 'BURST' (or sent ours).
229 * Anything from here on should be accepted a little more reasonably.
234 * Check for fake direction here, and drop any instances that are found.
235 * What is fake direction? Imagine the following server setup:
236 * 0AA <-> 0AB <-> 0AC
237 * Fake direction would be 0AC sending a message to 0AB claiming to be from
238 * 0AA, or something similar. Basically, a message taking a path that *cannot*
241 * When would this be seen?
242 * Well, hopefully never. It could be caused by race conditions, bugs, or
243 * "miscreant" servers, though, so let's check anyway. -- w
245 * We also check here for totally invalid prefixes (prefixes that are neither
246 * a valid SID or a valid UUID, so that invalid UUID or SID never makes it
247 * to the higher level functions. -- B
249 std::string direction = prefix;
251 User *t = this->ServerInstance->FindUUID(prefix);
255 direction = t->server;
257 else if (!this->Utils->FindServer(direction))
260 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"Protocol violation: Invalid prefix '%s' from connection '%s'", direction.c_str(), this->GetName().c_str());
264 TreeServer* route_back_again = Utils->BestRouteTo(direction);
265 if ((!route_back_again) || (route_back_again->GetSocket() != this))
267 if (route_back_again)
268 ServerInstance->Logs->Log("m_spanningtree",DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
272 * When there is activity on the socket, reset the ping counter so
273 * that we're not wasting bandwidth pinging an active server.
275 route_back_again->SetNextPingTime(ServerInstance->Time() + Utils->PingFreq);
276 route_back_again->SetPingFlag();
281 * Empty prefix from a server to server link:
282 * This is somewhat bad/naughty, so let's set the prefix
283 * to be the link that we got it from, so we don't break anything. -- w
285 TreeServer* n = Utils->FindServer(GetName());
293 * First up, check for any malformed commands (e.g. MODE without a timestamp)
294 * and rewrite commands where necessary (SVSMODE -> MODE for services). -- w
296 if (command == "SVSMODE") // This isn't in an "else if" so we still force FMODE for changes on channels.
300 * Now, check for (and parse) commands as appropriate. -- w
303 /* Find the server that this command originated from, used in the handlers below */
304 TreeServer *ServerSource = Utils->FindServer(prefix);
306 /* Find the link we just got this from so we don't bounce it back incorrectly */
307 std::string sourceserv = this->myhost;
308 if (!this->InboundServerName.empty())
310 sourceserv = this->InboundServerName;
314 * XXX one of these days, this needs to be moved into class Commands.
316 if (command == "UID")
318 return this->ParseUID(prefix, params, sourceserv);
320 else if (command == "FJOIN")
322 return this->ForceJoin(prefix,params);
324 else if ((command == "NOTICE" || command == "PRIVMSG") && (Utils->IsServer(prefix)))
326 return this->ServerMessage(assign(command), prefix, params, sourceserv);
328 else if (command == "STATS")
330 return this->Stats(prefix, params);
332 else if (command == "MOTD")
334 return this->Motd(prefix, params);
336 else if (command == "KILL" && ServerSource)
338 // Kill from a server
339 return this->RemoteKill(prefix,params);
341 else if (command == "MODULES")
343 return this->Modules(prefix, params);
345 else if (command == "ADMIN")
347 return this->Admin(prefix, params);
349 else if (command == "MAP")
351 User* user = ServerInstance->FindNick(prefix);
354 std::vector<std::string> p(params.begin(), params.end());
355 return Utils->Creator->HandleMap(p, user);
358 else if (command == "SERVER")
360 return this->RemoteServer(prefix,params);
362 else if (command == "ERROR")
364 return this->Error(params);
366 else if (command == "OPERTYPE")
368 return this->OperType(prefix, params, sourceserv);
370 else if (command == "FMODE")
372 return this->ForceMode(prefix,params);
374 else if (command == "FTOPIC")
376 return this->ForceTopic(prefix,params);
378 else if (command == "METADATA")
380 return this->MetaData(prefix,params);
382 else if (command == "PING")
384 return this->LocalPing(prefix,params);
386 else if (command == "PONG")
388 TreeServer *s = Utils->FindServer(prefix);
389 if (s && s->bursting)
391 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 has not finished burst, forcing end of burst (send ENDBURST!)", prefix.c_str());
394 return this->LocalPong(prefix,params);
396 else if (command == "VERSION")
398 return this->ServerVersion(prefix,params);
400 else if (command == "FHOST")
402 return this->ChangeHost(prefix,params);
404 else if (command == "FNAME")
406 return this->ChangeName(prefix,params);
408 else if (command == "ADDLINE")
410 return this->AddLine(prefix,params);
412 else if (command == "DELLINE")
414 return this->DelLine(prefix,params);
416 else if (command == "SVSNICK")
418 return this->ForceNick(prefix,params);
420 else if (command == "OPERQUIT")
422 return this->OperQuit(prefix,params);
424 else if (command == "IDLE")
426 return this->Whois(prefix,params);
428 else if (command == "PUSH")
430 return this->Push(prefix,params);
432 else if (command == "TIME")
434 return this->Time(prefix,params);
436 else if ((command == "KICK") && (Utils->IsServer(prefix)))
438 if (params.size() == 3)
440 TreeServer* pf = Utils->FindServer(prefix);
443 irc::commasepstream nicks(params[1]);
445 Channel* chan = this->ServerInstance->FindChan(params[0]);
448 while (nicks.GetToken(nick))
450 User* user = this->ServerInstance->FindNick(nick);
453 if (!chan->ServerKickUser(user, params[2].c_str(), false, pf->GetName().c_str()))
454 /* Yikes, the channels gone! */
462 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
464 else if (command == "SVSJOIN")
466 return this->ServiceJoin(prefix,params);
468 else if (command == "SVSPART")
470 return this->ServicePart(prefix,params);
472 else if (command == "SQUIT")
474 if (params.size() == 2)
476 this->Squit(Utils->FindServer(params[0]),params[1]);
480 else if (command == "MODENOTICE")
482 if (params.size() >= 2)
485 ServerInstance->Users->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", (ServerSource ? ServerSource->GetName().c_str() : prefix.c_str()), params[1].c_str());
487 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
489 else if (command == "SNONOTICE")
491 if (params.size() >= 2)
493 std::string oldprefix;
497 User *u = ServerInstance->FindNick(prefix);
503 ServerInstance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + (ServerSource ? ServerSource->GetName().c_str() : prefix) + ": "+ params[1]);
505 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
509 else if (command == "BURST")
511 // Set prefix server as bursting
514 this->ServerInstance->SNO->WriteToSnoMask('l', "WTF: Got BURST from a nonexistant server(?): %s", (ServerSource ? ServerSource->GetName().c_str() : prefix.c_str()));
518 ServerSource->bursting = true;
519 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
521 else if (command == "ENDBURST")
525 this->ServerInstance->SNO->WriteToSnoMask('l', "WTF: Got ENDBURST from a nonexistant server(?): %s", (ServerSource ? ServerSource->GetName().c_str() : prefix.c_str()));
529 ServerSource->FinishBurst();
530 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
532 else if (command == "ENCAP")
534 return this->Encap(prefix, params);
536 else if (command == "MODE" && !this->ServerInstance->FindUUID(prefix)) // XXX we should check for no such serv?
538 // Server-prefix MODE.
539 std::vector<std::string> modelist(params.begin(), params.end());
541 /* We don't support this for channel mode changes any more! */
542 if (params.size() >= 1)
544 if (ServerInstance->FindChan(params[0]))
546 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.");
551 // Insert into the parser
552 this->ServerInstance->SendMode(modelist, this->ServerInstance->FakeClient);
554 // Pass out to the network
555 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
560 * Not a special s2s command. Emulate the user doing it.
561 * This saves us having a huge ugly command parser again.
563 User* who = this->ServerInstance->FindUUID(prefix);
567 /* this looks ugly because command is an irc::string
568 * It is important that we dont close the link here, unknown prefix can occur
569 * due to various race conditions such as the KILL message for a user somehow
570 * crossing the users QUIT further upstream from the server. Thanks jilles!
572 ServerInstance->Logs->Log("m_spanningtree", DEBUG, "Command " + std::string(command.c_str()) + " from unknown prefix " + prefix + "! Dropping entire command.");
576 if (command == "NICK")
578 if (params.size() != 2)
580 SendError("Protocol violation: NICK message without TS - :"+std::string(who->uuid)+" NICK "+params[0]);
583 /* Update timestamp on user when they change nicks */
584 who->age = atoi(params[1].c_str());
587 * On nick messages, check that the nick doesnt already exist here.
588 * If it does, perform collision logic.
590 User* x = this->ServerInstance->FindNickOnly(params[0]);
591 if ((x) && (x != who))
594 /* x is local, who is remote */
595 collideret = this->DoCollision(x, who->age, who->ident, who->GetIPString(), who->uuid);
599 * Remote client lost, or both lost, parsing or passing on this
600 * nickchange would be pointless, as the incoming client's server will
601 * soon recieve SVSNICK to change its nick to its UID. :) -- w00t
609 std::vector<std::string> strparams(params.begin(), params.end());
611 switch (this->ServerInstance->CallCommandHandler(command.c_str(), strparams, who))
615 * XXX: command is irc::string, hence ugliness
617 this->SendError("Unrecognised or malformed command '" + std::string(command.c_str()) + "' -- possibly loaded mismatched modules");
622 * CMD_LOCALONLY is aliased to CMD_FAILURE, so this won't go out onto the network.
627 /* CMD_SUCCESS falls through here */
631 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
635 break; // end of state CONNECTED (phew).
640 std::string TreeSocket::GetName()
642 std::string sourceserv = this->myhost;
643 if (!this->InboundServerName.empty())
645 sourceserv = this->InboundServerName;
650 void TreeSocket::OnTimeout()
652 if (this->LinkState == CONNECTING)
654 this->ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Connection to \002%s\002 timed out.", myhost.c_str());
655 Link* MyLink = Utils->FindLink(myhost);
657 Utils->DoFailOver(MyLink);
661 void TreeSocket::OnClose()
663 // Test fix for big fuckup
664 if (this->LinkState != CONNECTED)
667 // Connection closed.
668 // If the connection is fully up (state CONNECTED)
669 // then propogate a netsplit to all peers.
670 std::string quitserver = this->myhost;
671 if (!this->InboundServerName.empty())
673 quitserver = this->InboundServerName;
675 TreeServer* s = Utils->FindServer(quitserver);
678 Squit(s,"Remote host closed the connection");
681 if (!quitserver.empty())
683 this->ServerInstance->SNO->WriteToSnoMask('l', "Connection to '\2%s\2' failed.",quitserver.c_str());
685 time_t server_uptime = ServerInstance->Time() - this->age;
687 this->ServerInstance->SNO->WriteToSnoMask('l', "Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());