1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2007 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 "configreader.h"
19 #include "commands/cmd_whois.h"
20 #include "commands/cmd_stats.h"
24 #include "transport.h"
26 #include "socketengine.h"
28 #include "m_spanningtree/main.h"
29 #include "m_spanningtree/utils.h"
30 #include "m_spanningtree/treeserver.h"
31 #include "m_spanningtree/link.h"
32 #include "m_spanningtree/treesocket.h"
33 #include "m_spanningtree/resolvers.h"
34 #include "m_spanningtree/handshaketimer.h"
36 /* $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 m_hash.h */
39 /** Because most of the I/O gubbins are encapsulated within
40 * InspSocket, we just call the superclass constructor for
41 * most of the action, and append a few of our own values
44 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod)
45 : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
48 this->LinkState = LISTENER;
49 theirchallenge.clear();
51 if (listening && Hook)
52 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
55 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, const std::string &ServerName, const std::string &bindto, Module* HookMod)
56 : InspSocket(SI, host, port, listening, maxtime, bindto), Utils(Util), Hook(HookMod)
59 theirchallenge.clear();
61 this->LinkState = CONNECTING;
63 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
66 /** When a listening socket gives us a new file descriptor,
67 * we must associate it with a socket without creating a new
68 * connection. This constructor is used for this purpose.
70 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod)
71 : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
73 this->LinkState = WAIT_AUTH_1;
74 theirchallenge.clear();
77 /* If we have a transport module hooked to the parent, hook the same module to this
78 * socket, and set a timer waiting for handshake before we send CAPAB etc.
81 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
83 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils, 1));
86 ServerState TreeSocket::GetLinkState()
88 return this->LinkState;
91 Module* TreeSocket::GetHook()
96 TreeSocket::~TreeSocket()
99 InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
101 Utils->DelBurstingServer(this);
104 const std::string& TreeSocket::GetOurChallenge()
106 return this->ourchallenge;
109 void TreeSocket::SetOurChallenge(const std::string &c)
111 this->ourchallenge = c;
114 const std::string& TreeSocket::GetTheirChallenge()
116 return this->theirchallenge;
119 void TreeSocket::SetTheirChallenge(const std::string &c)
121 this->theirchallenge = c;
124 std::string TreeSocket::MakePass(const std::string &password, const std::string &challenge)
126 /* This is a simple (maybe a bit hacky?) HMAC algorithm, thanks to jilles for
127 * suggesting the use of HMAC to secure the password against various attacks.
129 * Note: If m_sha256.so is not loaded, we MUST fall back to plaintext with no
130 * HMAC challenge/response.
132 Module* sha256 = Instance->FindModule("m_sha256.so");
133 if (Utils->ChallengeResponse && sha256 && !challenge.empty())
135 /* XXX: This is how HMAC is supposed to be done:
137 * sha256( (pass xor 0x5c) + sha256((pass xor 0x36) + m) )
139 * Note that we are encoding the hex hash, not the binary
140 * output of the hash which is slightly different to standard.
142 * Don't ask me why its always 0x5c and 0x36... it just is.
144 std::string hmac1, hmac2;
146 for (size_t n = 0; n < password.length(); n++)
148 hmac1 += static_cast<char>(password[n] ^ 0x5C);
149 hmac2 += static_cast<char>(password[n] ^ 0x36);
153 HashResetRequest(Utils->Creator, sha256).Send();
154 hmac2 = HashSumRequest(Utils->Creator, sha256, hmac2).Send();
156 HashResetRequest(Utils->Creator, sha256).Send();
157 std::string hmac = hmac1 + hmac2;
158 hmac = HashSumRequest(Utils->Creator, sha256, hmac).Send();
160 return "HMAC-SHA256:"+ hmac;
162 else if (!challenge.empty() && !sha256)
163 Instance->Log(DEFAULT,"Not authenticating to server using SHA256/HMAC because we don't have m_sha256 loaded!");
168 /** When an outbound connection finishes connecting, we receive
169 * this event, and must send our SERVER string to the other
170 * side. If the other side is happy, as outlined in the server
171 * to server docs on the inspircd.org site, the other side
172 * will then send back its own server string.
174 bool TreeSocket::OnConnected()
176 if (this->LinkState == CONNECTING)
178 /* we do not need to change state here. */
179 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
181 if (x->Name == this->myhost)
183 Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2[%s] started.", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->GetIP().c_str()));
186 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
187 Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2[%s] using transport \2%s\2", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->GetIP().c_str()),
190 this->OutboundPass = x->SendPass;
193 /* found who we're supposed to be connecting to, send the neccessary gubbins. */
195 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils, 1));
197 this->SendCapabilities();
203 /* There is a (remote) chance that between the /CONNECT and the connection
204 * being accepted, some muppet has removed the <link> block and rehashed.
205 * If that happens the connection hangs here until it's closed. Unlikely
206 * and rather harmless.
208 this->Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2 lost link tag(!)", myhost.c_str());
212 void TreeSocket::OnError(InspSocketError e)
216 if (this->LinkState == LISTENER)
222 Utils->Creator->RemoteMessage(NULL,"Connection failed: Connection to \002%s\002 refused", myhost.c_str());
223 MyLink = Utils->FindLink(myhost);
225 Utils->DoFailOver(MyLink);
228 Utils->Creator->RemoteMessage(NULL,"Connection failed: Could not create socket");
231 Utils->Creator->RemoteMessage(NULL,"Connection failed: Error binding socket to address or port");
234 Utils->Creator->RemoteMessage(NULL,"Connection failed: I/O error on connection");
236 case I_ERR_NOMOREFDS:
237 Utils->Creator->RemoteMessage(NULL,"Connection failed: Operating system is out of file descriptors!");
240 if ((errno) && (errno != EINPROGRESS) && (errno != EAGAIN))
241 Utils->Creator->RemoteMessage(NULL,"Connection to \002%s\002 failed with OS error: %s", myhost.c_str(), strerror(errno));
246 int TreeSocket::OnDisconnect()
248 /* For the same reason as above, we don't
249 * handle OnDisconnect()
254 /** Recursively send the server tree with distances as hops.
255 * This is used during network burst to inform the other server
256 * (and any of ITS servers too) of what servers we know about.
257 * If at any point any of these servers already exist on the other
258 * end, our connection may be terminated. The hopcounts given
259 * by this function are relative, this doesn't matter so long as
260 * they are all >1, as all the remote servers re-calculate them
261 * to be relative too, with themselves as hop 0.
263 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
266 for (unsigned int q = 0; q < Current->ChildCount(); q++)
268 TreeServer* recursive_server = Current->GetChild(q);
269 if (recursive_server != s)
271 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
272 this->WriteLine(command);
273 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
274 /* down to next level */
275 this->SendServers(recursive_server, s, hops+1);
280 std::string TreeSocket::MyCapabilities()
282 std::vector<std::string> modlist;
283 std::string capabilities;
284 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
286 if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
287 modlist.push_back(this->Instance->Config->module_names[i]);
289 sort(modlist.begin(),modlist.end());
290 for (unsigned int i = 0; i < modlist.size(); i++)
293 capabilities = capabilities + ",";
294 capabilities = capabilities + modlist[i];
299 std::string TreeSocket::RandString(unsigned int length)
301 char* randombuf = new char[length+1];
306 int fd = open("/dev/urandom", O_RDONLY, 0);
312 read(fd, randombuf, length);
318 for (unsigned int i = 0; i < length; i++)
319 randombuf[i] = rand();
322 for (unsigned int i = 0; i < length; i++)
324 char randchar = static_cast<char>((randombuf[i] & 0x7F) | 0x21);
325 out += (randchar == '=' ? '_' : randchar);
332 void TreeSocket::SendCapabilities()
338 irc::commasepstream modulelist(MyCapabilities());
339 this->WriteLine("CAPAB START");
341 /* Send module names, split at 509 length */
343 std::string line = "CAPAB MODULES ";
344 while (modulelist.GetToken(item))
346 if (line.length() + item.length() + 1 > 509)
348 this->WriteLine(line);
349 line = "CAPAB MODULES ";
352 if (line != "CAPAB MODULES ")
357 if (line != "CAPAB MODULES ")
358 this->WriteLine(line);
365 #ifdef SUPPORT_IP6LINKS
369 /* Do we have sha256 available? If so, we send a challenge */
370 if (Utils->ChallengeResponse && (Instance->FindModule("m_sha256.so")))
372 this->SetOurChallenge(RandString(20));
373 extra = " CHALLENGE=" + this->GetOurChallenge();
376 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion)+extra+" PREFIX="+Instance->Modes->BuildPrefixes()+" CHANMODES="+Instance->Modes->ChanModes());
378 this->WriteLine("CAPAB END");
381 /* Check a comma seperated list for an item */
382 bool TreeSocket::HasItem(const std::string &list, const std::string &item)
384 irc::commasepstream seplist(list);
387 while (seplist.GetToken(item2))
395 /* Isolate and return the elements that are different between two comma seperated lists */
396 std::string TreeSocket::ListDifference(const std::string &one, const std::string &two)
398 irc::commasepstream list_one(one);
401 while (list_one.GetToken(item))
403 if (!HasItem(two, item))
412 void TreeSocket::SendError(const std::string &errormessage)
414 /* Display the error locally as well as sending it remotely */
415 this->WriteLine("ERROR :"+errormessage);
416 Utils->Creator->RemoteMessage(NULL, "Sent \2ERROR\2 to %s: %s", (this->InboundServerName.empty() ? "<unknown>" : this->InboundServerName.c_str()), errormessage.c_str());
417 /* One last attempt to make sure the error reaches its target */
418 this->FlushWriteBuffer();
421 bool TreeSocket::Capab(const std::deque<std::string> ¶ms)
423 if (params.size() < 1)
425 this->SendError("Invalid number of parameters for CAPAB - Mismatched version");
428 if (params[0] == "START")
430 this->ModuleList.clear();
431 this->CapKeys.clear();
433 else if (params[0] == "END")
437 #ifdef SUPPORT_IP6LINKS
440 /* Compare ModuleList and check CapKeys...
441 * Maybe this could be tidier? -- Brain
443 if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
445 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
448 diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
452 diff = "this server:" + diff;
454 if (diff.length() == 12)
455 reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
457 reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
460 cap_validation valid_capab[] = {
461 {"Maximum nickname lengths differ or remote nickname length not specified", "NICKMAX", NICKMAX},
462 {"Maximum ident lengths differ or remote ident length not specified", "IDENTMAX", IDENTMAX},
463 {"Maximum channel lengths differ or remote channel length not specified", "CHANMAX", CHANMAX},
464 {"Maximum modes per line differ or remote modes per line not specified", "MAXMODES", MAXMODES},
465 {"Maximum quit lengths differ or remote quit length not specified", "MAXQUIT", MAXQUIT},
466 {"Maximum topic lengths differ or remote topic length not specified", "MAXTOPIC", MAXTOPIC},
467 {"Maximum kick lengths differ or remote kick length not specified", "MAXKICK", MAXKICK},
468 {"Maximum GECOS (fullname) lengths differ or remote GECOS length not specified", "MAXGECOS", MAXGECOS},
469 {"Maximum awaymessage lengths differ or remote awaymessage length not specified", "MAXAWAY", MAXAWAY},
473 if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
474 reason = "We don't both support linking to IPV6 servers";
475 if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
476 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
477 if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
479 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
480 reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
482 reason = "Protocol version not specified";
485 if(this->CapKeys.find("PREFIX") != this->CapKeys.end() && this->CapKeys.find("PREFIX")->second != this->Instance->Modes->BuildPrefixes())
486 reason = "One or more of the prefixes on the remote server are invalid on this server.";
488 if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
489 reason = "We don't both have halfop support enabled/disabled identically";
491 for (int x = 0; valid_capab[x].size; ++x)
493 if (((this->CapKeys.find(valid_capab[x].key) == this->CapKeys.end()) || ((this->CapKeys.find(valid_capab[x].key) != this->CapKeys.end()) &&
494 (this->CapKeys.find(valid_capab[x].key)->second != ConvToStr(valid_capab[x].size)))))
495 reason = valid_capab[x].reason;
498 /* Challenge response, store their challenge for our password */
499 std::map<std::string,std::string>::iterator n = this->CapKeys.find("CHALLENGE");
500 if (Utils->ChallengeResponse && (n != this->CapKeys.end()) && (Instance->FindModule("m_sha256.so")))
502 /* Challenge-response is on now */
503 this->SetTheirChallenge(n->second);
504 if (!this->GetTheirChallenge().empty() && (this->LinkState == CONNECTING))
506 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(OutboundPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
511 /* They didnt specify a challenge or we don't have m_sha256.so, we use plaintext */
512 if (this->LinkState == CONNECTING)
513 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+OutboundPass+" 0 :"+this->Instance->Config->ServerDesc);
518 this->SendError("CAPAB negotiation failed: "+reason);
522 else if ((params[0] == "MODULES") && (params.size() == 2))
524 if (!this->ModuleList.length())
526 this->ModuleList.append(params[1]);
530 this->ModuleList.append(",");
531 this->ModuleList.append(params[1]);
535 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
537 irc::tokenstream capabs(params[1]);
540 while ((more = capabs.GetToken(item)))
542 /* Process each key/value pair */
543 std::string::size_type equals = item.rfind('=');
544 if (equals != std::string::npos)
546 std::string var = item.substr(0, equals);
547 std::string value = item.substr(equals+1, item.length());
548 CapKeys[var] = value;
555 /** This function forces this server to quit, removing this server
556 * and any users on it (and servers and users below that, etc etc).
557 * It's very slow and pretty clunky, but luckily unless your network
558 * is having a REAL bad hair day, this function shouldnt be called
559 * too many times a month ;-)
561 void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
563 /* recursively squit the servers attached to 'Current'.
564 * We're going backwards so we don't remove users
565 * while we still need them ;)
567 for (unsigned int q = 0; q < Current->ChildCount(); q++)
569 TreeServer* recursive_server = Current->GetChild(q);
570 this->SquitServer(from,recursive_server);
572 /* Now we've whacked the kids, whack self */
574 num_lost_users += Current->QuitUsers(from);
577 /** This is a wrapper function for SquitServer above, which
578 * does some validation first and passes on the SQUIT to all
579 * other remaining servers.
581 void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
583 if ((Current) && (Current != Utils->TreeRoot))
585 Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
586 rmode.Send(Instance);
588 std::deque<std::string> params;
589 params.push_back(Current->GetName());
590 params.push_back(":"+reason);
591 Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
592 if (Current->GetParent() == Utils->TreeRoot)
594 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split: "+reason);
598 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
600 num_lost_servers = 0;
602 std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
603 SquitServer(from, Current);
605 Current->GetParent()->DelChild(Current);
607 this->Instance->SNO->WriteToSnoMask('l',"Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
610 Instance->Log(DEFAULT,"Squit from unknown server");
613 /** FMODE command - server mode with timestamp checks */
614 bool TreeSocket::ForceMode(const std::string &source, std::deque<std::string> ¶ms)
616 /* Chances are this is a 1.0 FMODE without TS */
617 if (params.size() < 3)
619 /* No modes were in the command, probably a channel with no modes set on it */
624 std::string sourceserv;
625 /* Are we dealing with an FMODE from a user, or from a server? */
626 userrec* who = this->Instance->FindNick(source);
629 /* FMODE from a user, set sourceserv to the users server name */
630 sourceserv = who->server;
634 /* FMODE from a server, create a fake user to receive mode feedback */
635 who = new userrec(this->Instance);
636 who->SetFd(FD_MAGIC_NUMBER);
637 smode = true; /* Setting this flag tells us we should free the userrec later */
638 sourceserv = source; /* Set sourceserv to the actual source string */
640 const char* modelist[64];
643 memset(&modelist,0,sizeof(modelist));
644 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
648 /* The timestamp is in this position.
649 * We don't want to pass that up to the
650 * server->client protocol!
652 TS = atoi(params[q].c_str());
656 /* Everything else is fine to append to the modelist */
657 modelist[n++] = params[q].c_str();
661 /* Extract the TS value of the object, either userrec or chanrec */
662 userrec* dst = this->Instance->FindNick(params[0]);
663 chanrec* chan = NULL;
671 chan = this->Instance->FindChan(params[0]);
677 /* Oops, channel doesnt exist! */
683 Instance->Log(DEFAULT,"*** BUG? *** TS of 0 sent to FMODE. Are some services authors smoking craq, or is it 1970 again?. Dropped.");
684 Instance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending FMODE with a TS of zero. Total craq. Mode was dropped.", sourceserv.c_str());
688 /* TS is equal or less: Merge the mode changes into ours and pass on.
692 if ((TS < ourTS) && (!dst))
693 Instance->Log(DEFAULT,"*** BUG *** Channel TS sent in FMODE to %s is %lu which is not equal to %lu!", params[0].c_str(), TS, ourTS);
697 this->Instance->SendMode(modelist, n, who);
701 this->Instance->CallCommandHandler("MODE", modelist, n, who);
703 /* HOT POTATO! PASS IT ON! */
704 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
706 /* If the TS is greater than ours, we drop the mode and dont pass it anywhere.
715 /** FTOPIC command */
716 bool TreeSocket::ForceTopic(const std::string &source, std::deque<std::string> ¶ms)
718 if (params.size() != 4)
720 time_t ts = atoi(params[1].c_str());
721 std::string nsource = source;
722 chanrec* c = this->Instance->FindChan(params[0]);
725 if ((ts >= c->topicset) || (!*c->topic))
727 std::string oldtopic = c->topic;
728 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
729 strlcpy(c->setby,params[2].c_str(),127);
731 /* if the topic text is the same as the current topic,
732 * dont bother to send the TOPIC command out, just silently
733 * update the set time and set nick.
735 if (oldtopic != params[3])
737 userrec* user = this->Instance->FindNick(source);
740 c->WriteChannelWithServ(Instance->Config->ServerName, "TOPIC %s :%s", c->name, c->topic);
744 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
745 nsource = user->server;
747 /* all done, send it on its way */
748 params[3] = ":" + params[3];
749 Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
757 /** FJOIN, similar to TS6 SJOIN, but not quite. */
758 bool TreeSocket::ForceJoin(const std::string &source, std::deque<std::string> ¶ms)
760 /* 1.1 FJOIN works as follows:
762 * Each FJOIN is sent along with a timestamp, and the side with the lowest
763 * timestamp 'wins'. From this point on we will refer to this side as the
764 * winner. The side with the higher timestamp loses, from this point on we
765 * will call this side the loser or losing side. This should be familiar to
766 * anyone who's dealt with dreamforge or TS6 before.
768 * When two sides of a split heal and this occurs, the following things
771 * If the timestamps are exactly equal, both sides merge their privilages
772 * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
773 * re-created during a split, this is safe to do.
775 * If the timestamps are NOT equal, the losing side removes all of its
776 * modes from the channel, before introducing new users into the channel
777 * which are listed in the FJOIN command's parameters. The losing side then
778 * LOWERS its timestamp value of the channel to match that of the winning
779 * side, and the modes of the users of the winning side are merged in with
782 * The winning side on the other hand will ignore all user modes from the
783 * losing side, so only its own modes get applied. Life is simple for those
784 * who succeed at internets. :-)
786 * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
787 * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
788 * you ask? Well, quite simply because we don't need to. They'll be sent
789 * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
790 * the losing side sends any modes for the channel which shouldnt win,
791 * they wont as their timestamp will be too high :-)
794 if (params.size() < 3)
797 irc::modestacker modestack(true); /* Modes to apply from the users in the user list */
798 userrec* who = NULL; /* User we are currently checking */
799 std::string channel = params[0]; /* Channel name, as a string */
800 time_t TS = atoi(params[1].c_str()); /* Timestamp given to us for remote side */
801 irc::tokenstream users(params[2]); /* Users from the user list */
802 bool apply_other_sides_modes = true; /* True if we are accepting the other side's modes */
803 chanrec* chan = this->Instance->FindChan(channel); /* The channel we're sending joins to */
804 time_t ourTS = chan ? chan->age : Instance->Time(true)+600; /* The TS of our side of the link */
805 bool created = !chan; /* True if the channel doesnt exist here yet */
806 std::string item; /* One item in the list of nicks */
808 params[2] = ":" + params[2];
809 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
813 Instance->Log(DEFAULT,"*** BUG? *** TS of 0 sent to FJOIN. Are some services authors smoking craq, or is it 1970 again?. Dropped.");
814 Instance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending FJOIN with a TS of zero. Total craq. Command was dropped.", source.c_str());
818 /* If our TS is less than theirs, we dont accept their modes */
820 apply_other_sides_modes = false;
822 /* Our TS greater than theirs, clear all our modes from the channel, accept theirs. */
825 std::deque<std::string> param_list;
826 if (Utils->AnnounceTSChange && chan)
827 chan->WriteChannelWithServ(Instance->Config->ServerName, "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
832 param_list.push_back(channel);
833 this->RemoveStatus(Instance->Config->ServerName, param_list);
837 /* Now, process every 'prefixes,nick' pair */
838 while (users.GetToken(item))
840 const char* usr = item.c_str();
843 const char* permissions = usr;
844 /* Iterate through all the prefix values, convert them from prefixes to mode letters */
846 while ((*permissions) && (*permissions != ','))
848 ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
850 modes = modes + mh->GetModeChar();
853 this->SendError(std::string("Invalid prefix '")+(*permissions)+"' in FJOIN");
859 /* Advance past the comma, to the nick */
862 /* Check the user actually exists */
863 who = this->Instance->FindUUID(usr);
866 /* Check that the user's 'direction' is correct */
867 TreeServer* route_back_again = Utils->BestRouteTo(who->server);
868 if ((!route_back_again) || (route_back_again->GetSocket() != this))
871 /* Add any permissions this user had to the mode stack */
872 for (std::string::iterator x = modes.begin(); x != modes.end(); ++x)
873 modestack.Push(*x, who->nick);
875 chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "", TS);
879 Instance->Log(SPARSE,"Warning! Invalid user %s in FJOIN to channel %s IGNORED", usr, channel.c_str());
885 /* Flush mode stacker if we lost the FJOIN or had equal TS */
886 if (apply_other_sides_modes)
888 std::deque<std::string> stackresult;
889 const char* mode_junk[MAXMODES+2];
890 userrec* n = new userrec(Instance);
891 n->SetFd(FD_MAGIC_NUMBER);
892 mode_junk[0] = channel.c_str();
894 while (modestack.GetStackedLine(stackresult))
896 for (size_t j = 0; j < stackresult.size(); j++)
898 mode_junk[j+1] = stackresult[j].c_str();
900 Instance->SendMode(mode_junk, stackresult.size() + 1, n);
909 bool TreeSocket::ParseUID(const std::string &source, std::deque<std::string> ¶ms)
911 /** Do we have enough parameters:
912 * UID uuid age nick host dhost ident +modestr ip.string :gecos
914 if (params.size() != 9)
916 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[0]+" :Invalid client introduction ("+params[0]+"?)");
920 time_t age = ConvToInt(params[1]);
921 const char* tempnick = params[2].c_str();
924 /* XXX probably validate UID length too -- w00t */
925 cmd_validation valid[] = { {"Nickname", 2, NICKMAX}, {"Hostname", 3, 64}, {"Displayed hostname", 4, 64}, {"Ident", 5, IDENTMAX}, {"GECOS", 7, MAXGECOS}, {"", 0, 0} };
927 TreeServer* remoteserver = Utils->FindServer(source);
931 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[0]+" :Invalid client introduction (Unknown server "+source+")");
935 userrec *u = this->Instance->FindUUID(params[0]);
940 userrec::QuitUser(this->Instance, u, "UID collision (?!)");
941 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[0]+" :Invalid client introduction (UID collision (?!))");
945 /* Check parameters for validity before introducing the client, discovered by dmb */
948 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[0]+" :Invalid client introduction (Invalid TS?)");
952 for (size_t x = 0; valid[x].length; ++x)
954 if (params[valid[x].param].length() > valid[x].length)
956 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[0]+" :Invalid client introduction (" + valid[x].item + " > " + ConvToStr(valid[x].length) + ")");
961 /** Our client looks ok, lets introduce it now
963 Instance->Log(DEBUG,"New remote client %s", tempnick);
964 user_hash::iterator iter = this->Instance->clientlist->find(tempnick);
966 if (iter != this->Instance->clientlist->end())
969 * Uh oh, nick collision. Under old rules, we'd kill both. These days now we have UUID,
970 * we force both clients to change nick to their UUID. Just change ours, and the other
971 * server will change theirs when they see the collide. Problem solved! -- w00t
973 iter->second->ForceNickChange(iter->second->uuid);
975 /* also reassign tempnick so we don't trample the hash - important! */
976 tempnick = params[0].c_str();
979 userrec* _new = new userrec(this->Instance);
980 (*(this->Instance->clientlist))[tempnick] = _new;
981 _new->SetFd(FD_MAGIC_NUMBER);
982 strlcpy(_new->nick, tempnick, NICKMAX - 1);
983 strlcpy(_new->uuid, params[0].c_str(), UUID_LENGTH);
984 strlcpy(_new->host, params[3].c_str(),64);
985 strlcpy(_new->dhost, params[4].c_str(),64);
986 _new->server = this->Instance->FindServerNamePtr(source.c_str());
987 strlcpy(_new->ident, params[5].c_str(),IDENTMAX);
988 strlcpy(_new->fullname, params[8].c_str(),MAXGECOS);
989 _new->registered = REG_ALL;
992 /* we need to remove the + from the modestring, so we can do our stuff */
993 std::string::size_type pos_after_plus = params[6].find_first_not_of('+');
994 if (pos_after_plus != std::string::npos)
995 params[6] = params[6].substr(pos_after_plus);
997 for (std::string::iterator v = params[6].begin(); v != params[6].end(); v++)
999 /* For each mode thats set, increase counter */
1000 ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER);
1004 mh->OnModeChange(_new, _new, NULL, empty, true);
1005 _new->SetMode(*v, true);
1010 /* now we've done with modes processing, put the + back for remote servers */
1011 params[6] = "+" + params[6];
1013 #ifdef SUPPORT_IP6LINKS
1014 if (params[7].find_first_of(":") != std::string::npos)
1015 _new->SetSockAddr(AF_INET6, params[7].c_str(), 0);
1018 _new->SetSockAddr(AF_INET, params[7].c_str(), 0);
1020 Instance->AddGlobalClone(_new);
1022 bool dosend = !(((this->Utils->quiet_bursts) && (this->bursting || Utils->FindRemoteBurstServer(remoteserver))) || (this->Instance->SilentULine(_new->server)));
1025 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s] [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString(), _new->fullname);
1027 params[8] = ":" + params[8];
1028 Utils->DoOneToAllButSender(source, "UID", params, source);
1030 // Increment the Source Servers User Count..
1031 TreeServer* SourceServer = Utils->FindServer(source);
1034 SourceServer->AddUserCount();
1037 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1042 /** Send one or more FJOINs for a channel of users.
1043 * If the length of a single line is more than 480-NICKMAX
1044 * in length, it is split over multiple lines.
1046 void TreeSocket::SendFJoins(TreeServer* Current, chanrec* c)
1050 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1052 size_t dlen, curlen;
1053 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1055 char* ptr = list + dlen;
1057 CUList *ulist = c->GetUsers();
1061 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1063 // The first parameter gets a : before it
1064 size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->first), i->first->uuid);
1071 if (curlen > (480-NICKMAX))
1073 buffer.append(list).append("\r\n");
1074 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1082 buffer.append(list).append("\r\n");
1084 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true)).append("\r\n");
1087 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1089 int size = strlen(b->data) + 2;
1090 int currsize = linesize + size;
1091 if (currsize <= 350)
1094 params.append(" ").append(b->data);
1097 if ((params.length() >= MAXMODES) || (currsize > 350))
1099 /* Wrap at MAXMODES */
1100 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
1107 /* Only send these if there are any */
1109 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
1111 this->WriteLine(buffer);
1114 /** Send G, Q, Z and E lines */
1115 void TreeSocket::SendXLines(TreeServer* Current)
1119 std::string n = this->Instance->Config->ServerName;
1120 const char* sn = n.c_str();
1121 /* Yes, these arent too nice looking, but they get the job done */
1122 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++)
1124 snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1125 buffer.append(data);
1127 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++)
1129 snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1130 buffer.append(data);
1132 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++)
1134 snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1135 buffer.append(data);
1137 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++)
1139 snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1140 buffer.append(data);
1142 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++)
1144 snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1145 buffer.append(data);
1147 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++)
1149 snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1150 buffer.append(data);
1152 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++)
1154 snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1155 buffer.append(data);
1157 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++)
1159 snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1160 buffer.append(data);
1163 if (!buffer.empty())
1164 this->WriteLine(buffer);
1167 /** Send channel modes and topics */
1168 void TreeSocket::SendChannelModes(TreeServer* Current)
1171 std::deque<std::string> list;
1172 std::string n = this->Instance->Config->ServerName;
1173 const char* sn = n.c_str();
1174 Instance->Log(DEBUG,"Sending channels and modes, %d to send", this->Instance->chanlist->size());
1175 for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
1177 SendFJoins(Current, c->second);
1178 if (*c->second->topic)
1180 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1181 this->WriteLine(data);
1183 FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
1185 c->second->GetExtList(list);
1186 for (unsigned int j = 0; j < list.size(); j++)
1188 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
1193 /** send all users and their oper state/modes */
1194 void TreeSocket::SendUsers(TreeServer* Current)
1197 std::deque<std::string> list;
1198 std::string dataline;
1199 for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
1201 if (u->second->registered == REG_ALL)
1203 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s +%s %s :%s", u->second->server, u->second->uuid, (unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
1204 this->WriteLine(data);
1205 if (*u->second->oper)
1207 snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid, u->second->oper);
1208 this->WriteLine(data);
1210 if (*u->second->awaymsg)
1212 snprintf(data,MAXBUF,":%s AWAY :%s", u->second->uuid, u->second->awaymsg);
1213 this->WriteLine(data);
1218 for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
1220 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
1222 u->second->GetExtList(list);
1223 for (unsigned int j = 0; j < list.size(); j++)
1225 FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
1230 /** This function is called when we want to send a netburst to a local
1231 * server. There is a set order we must do this, because for example
1232 * users require their servers to exist, and channels require their
1233 * users to exist. You get the idea.
1235 void TreeSocket::DoBurst(TreeServer* s)
1237 std::string name = s->GetName();
1238 std::string burst = "BURST "+ConvToStr(Instance->Time(true));
1239 std::string endburst = "ENDBURST";
1240 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s).", name.c_str(), this->GetTheirChallenge().empty() ? "plaintext password" : "SHA256-HMAC challenge-response");
1241 this->WriteLine(burst);
1242 /* send our version string */
1243 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1244 /* Send server tree */
1245 this->SendServers(Utils->TreeRoot,s,1);
1246 /* Send users and their oper status */
1248 /* Send everything else (channel modes, xlines etc) */
1249 this->SendChannelModes(s);
1250 this->SendXLines(s);
1251 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
1252 this->WriteLine(endburst);
1253 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1256 /** This function is called when we receive data from a remote
1257 * server. We buffer the data in a std::string (it doesnt stay
1258 * there for long), reading using InspSocket::Read() which can
1259 * read up to 16 kilobytes in one operation.
1261 * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1262 * THE SOCKET OBJECT FOR US.
1264 bool TreeSocket::OnDataReady()
1266 char* data = this->Read();
1267 /* Check that the data read is a valid pointer and it has some content */
1270 this->in_buffer.append(data);
1271 /* While there is at least one new line in the buffer,
1272 * do something useful (we hope!) with it.
1274 while (in_buffer.find("\n") != std::string::npos)
1276 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1277 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1278 /* Use rfind here not find, as theres more
1279 * chance of the \r being near the end of the
1280 * string, not the start.
1282 if (ret.find("\r") != std::string::npos)
1283 ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1284 /* Process this one, abort if it
1285 * didnt return true.
1287 if (!this->ProcessLine(ret))
1294 /* EAGAIN returns an empty but non-NULL string, so this
1295 * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1297 return (data && !*data);