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 * ---------------------------------------------------
14 #include "configreader.h"
18 #include "commands/cmd_whois.h"
19 #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 = ourchallenge = "";
50 if (listening && Hook)
51 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
54 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)
55 : InspSocket(SI, host, port, listening, maxtime, bindto), Utils(Util), Hook(HookMod)
58 theirchallenge = ourchallenge = "";
59 this->LinkState = CONNECTING;
61 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
64 /** When a listening socket gives us a new file descriptor,
65 * we must associate it with a socket without creating a new
66 * connection. This constructor is used for this purpose.
68 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod)
69 : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
71 this->LinkState = WAIT_AUTH_1;
72 theirchallenge = ourchallenge = "";
73 /* If we have a transport module hooked to the parent, hook the same module to this
74 * socket, and set a timer waiting for handshake before we send CAPAB etc.
77 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
79 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils, 1));
82 ServerState TreeSocket::GetLinkState()
84 return this->LinkState;
87 Module* TreeSocket::GetHook()
92 TreeSocket::~TreeSocket()
95 InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
97 Utils->DelBurstingServer(this);
100 const std::string& TreeSocket::GetOurChallenge()
102 return this->ourchallenge;
105 void TreeSocket::SetOurChallenge(const std::string &c)
107 this->ourchallenge = c;
110 const std::string& TreeSocket::GetTheirChallenge()
112 return this->theirchallenge;
115 void TreeSocket::SetTheirChallenge(const std::string &c)
117 this->theirchallenge = c;
120 std::string TreeSocket::MakePass(const std::string &password, const std::string &challenge)
122 /* This is a simple (maybe a bit hacky?) HMAC algorithm, thanks to jilles for
123 * suggesting the use of HMAC to secure the password against various attacks.
125 * Note: If m_sha256.so is not loaded, we MUST fall back to plaintext with no
126 * HMAC challenge/response.
128 Module* sha256 = Instance->FindModule("m_sha256.so");
129 if (Utils->ChallengeResponse && sha256 && !challenge.empty())
131 /* XXX: This is how HMAC is supposed to be done:
133 * sha256( (pass xor 0x5c) + sha256((pass xor 0x36) + m) )
135 * Note that we are encoding the hex hash, not the binary
136 * output of the hash which is slightly different to standard.
138 * Don't ask me why its always 0x5c and 0x36... it just is.
140 std::string hmac1, hmac2;
142 for (size_t n = 0; n < password.length(); n++)
144 hmac1 += static_cast<char>(password[n] ^ 0x5C);
145 hmac2 += static_cast<char>(password[n] ^ 0x36);
149 HashResetRequest(Utils->Creator, sha256).Send();
150 hmac2 = HashSumRequest(Utils->Creator, sha256, hmac2).Send();
152 HashResetRequest(Utils->Creator, sha256).Send();
153 std::string hmac = hmac1 + hmac2;
154 hmac = HashSumRequest(Utils->Creator, sha256, hmac).Send();
156 return "HMAC-SHA256:"+ hmac;
158 else if (!challenge.empty() && !sha256)
159 Instance->Log(DEFAULT,"Not authenticating to server using SHA256/HMAC because we don't have m_sha256 loaded!");
164 /** When an outbound connection finishes connecting, we receive
165 * this event, and must send our SERVER string to the other
166 * side. If the other side is happy, as outlined in the server
167 * to server docs on the inspircd.org site, the other side
168 * will then send back its own server string.
170 bool TreeSocket::OnConnected()
172 if (this->LinkState == CONNECTING)
174 /* we do not need to change state here. */
175 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
177 if (x->Name == this->myhost)
179 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
182 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
183 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2");
185 this->OutboundPass = x->SendPass;
187 /* found who we're supposed to be connecting to, send the neccessary gubbins. */
189 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils, 1));
191 this->SendCapabilities();
197 /* There is a (remote) chance that between the /CONNECT and the connection
198 * being accepted, some muppet has removed the <link> block and rehashed.
199 * If that happens the connection hangs here until it's closed. Unlikely
200 * and rather harmless.
202 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
206 void TreeSocket::OnError(InspSocketError e)
213 this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
214 MyLink = Utils->FindLink(myhost);
216 Utils->DoFailOver(MyLink);
219 this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Could not create socket");
222 this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Error binding socket to address or port");
225 this->Instance->SNO->WriteToSnoMask('l',"Connection failed: I/O error on connection");
227 case I_ERR_NOMOREFDS:
228 this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Operating system is out of file descriptors!");
231 if ((errno) && (errno != EINPROGRESS) && (errno != EAGAIN))
233 std::string errstr = strerror(errno);
234 this->Instance->SNO->WriteToSnoMask('l',"Connection to \002"+myhost+"\002 failed with OS error: " + errstr);
240 int TreeSocket::OnDisconnect()
242 /* For the same reason as above, we don't
243 * handle OnDisconnect()
248 /** Recursively send the server tree with distances as hops.
249 * This is used during network burst to inform the other server
250 * (and any of ITS servers too) of what servers we know about.
251 * If at any point any of these servers already exist on the other
252 * end, our connection may be terminated. The hopcounts given
253 * by this function are relative, this doesn't matter so long as
254 * they are all >1, as all the remote servers re-calculate them
255 * to be relative too, with themselves as hop 0.
257 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
260 for (unsigned int q = 0; q < Current->ChildCount(); q++)
262 TreeServer* recursive_server = Current->GetChild(q);
263 if (recursive_server != s)
265 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
266 this->WriteLine(command);
267 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
268 /* down to next level */
269 this->SendServers(recursive_server, s, hops+1);
274 std::string TreeSocket::MyCapabilities()
276 std::vector<std::string> modlist;
277 std::string capabilities = "";
278 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
280 if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
281 modlist.push_back(this->Instance->Config->module_names[i]);
283 sort(modlist.begin(),modlist.end());
284 for (unsigned int i = 0; i < modlist.size(); i++)
287 capabilities = capabilities + ",";
288 capabilities = capabilities + modlist[i];
293 std::string TreeSocket::RandString(unsigned int length)
295 char* randombuf = new char[length+1];
297 int fd = open("/dev/urandom", O_RDONLY, 0);
301 read(fd, randombuf, length);
306 for (unsigned int i = 0; i < length; i++)
307 randombuf[i] = rand();
310 for (unsigned int i = 0; i < length; i++)
312 char randchar = static_cast<char>((randombuf[i] & 0x7F) | 0x21);
313 out += (randchar == '=' ? '_' : randchar);
320 void TreeSocket::SendCapabilities()
322 irc::commasepstream modulelist(MyCapabilities());
323 this->WriteLine("CAPAB START");
325 /* Send module names, split at 509 length */
326 std::string item = "*";
327 std::string line = "CAPAB MODULES ";
328 while ((item = modulelist.GetToken()) != "")
330 if (line.length() + item.length() + 1 > 509)
332 this->WriteLine(line);
333 line = "CAPAB MODULES ";
336 if (line != "CAPAB MODULES ")
341 if (line != "CAPAB MODULES ")
342 this->WriteLine(line);
349 #ifdef SUPPORT_IP6LINKS
353 /* Do we have sha256 available? If so, we send a challenge */
354 if (Utils->ChallengeResponse && (Instance->FindModule("m_sha256.so")))
356 this->SetOurChallenge(RandString(20));
357 extra = " CHALLENGE=" + this->GetOurChallenge();
360 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);
362 this->WriteLine("CAPAB END");
365 /* Check a comma seperated list for an item */
366 bool TreeSocket::HasItem(const std::string &list, const std::string &item)
368 irc::commasepstream seplist(list);
369 std::string item2 = "*";
370 while ((item2 = seplist.GetToken()) != "")
378 /* Isolate and return the elements that are different between two comma seperated lists */
379 std::string TreeSocket::ListDifference(const std::string &one, const std::string &two)
381 irc::commasepstream list_one(one);
382 std::string item = "*";
383 std::string result = "";
384 while ((item = list_one.GetToken()) != "")
386 if (!HasItem(two, item))
395 void TreeSocket::SendError(const std::string &errormessage)
397 /* Display the error locally as well as sending it remotely */
398 this->WriteLine("ERROR :"+errormessage);
399 this->Instance->SNO->WriteToSnoMask('l',"Sent \2ERROR\2 to "+this->InboundServerName+": "+errormessage);
400 /* One last attempt to make sure the error reaches its target */
401 this->FlushWriteBuffer();
404 bool TreeSocket::Capab(const std::deque<std::string> ¶ms)
406 if (params.size() < 1)
408 this->SendError("Invalid number of parameters for CAPAB - Mismatched version");
411 if (params[0] == "START")
413 this->ModuleList = "";
414 this->CapKeys.clear();
416 else if (params[0] == "END")
418 std::string reason = "";
420 #ifdef SUPPORT_IP6LINKS
423 /* Compare ModuleList and check CapKeys...
424 * Maybe this could be tidier? -- Brain
426 if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
428 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
431 diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
435 diff = "this server:" + diff;
437 if (diff.length() == 12)
438 reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
440 reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
443 cap_validation valid_capab[] = {
444 {"Maximum nickname lengths differ or remote nickname length not specified", "NICKMAX", NICKMAX},
445 {"Maximum ident lengths differ or remote ident length not specified", "IDENTMAX", IDENTMAX},
446 {"Maximum channel lengths differ or remote channel length not specified", "CHANMAX", CHANMAX},
447 {"Maximum modes per line differ or remote modes per line not specified", "MAXMODES", MAXMODES},
448 {"Maximum quit lengths differ or remote quit length not specified", "MAXQUIT", MAXQUIT},
449 {"Maximum topic lengths differ or remote topic length not specified", "MAXTOPIC", MAXTOPIC},
450 {"Maximum kick lengths differ or remote kick length not specified", "MAXKICK", MAXKICK},
451 {"Maximum GECOS (fullname) lengths differ or remote GECOS length not specified", "MAXGECOS", MAXGECOS},
452 {"Maximum awaymessage lengths differ or remote awaymessage length not specified", "MAXAWAY", MAXAWAY},
456 if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
457 reason = "We don't both support linking to IPV6 servers";
458 if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
459 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
460 if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
462 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
463 reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
465 reason = "Protocol version not specified";
468 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))))
469 reason = "We don't both have halfop support enabled/disabled identically";
471 for (int x = 0; valid_capab[x].size; ++x)
473 if (((this->CapKeys.find(valid_capab[x].key) == this->CapKeys.end()) || ((this->CapKeys.find(valid_capab[x].key) != this->CapKeys.end()) &&
474 (this->CapKeys.find(valid_capab[x].key)->second != ConvToStr(valid_capab[x].size)))))
475 reason = valid_capab[x].reason;
478 /* Challenge response, store their challenge for our password */
479 std::map<std::string,std::string>::iterator n = this->CapKeys.find("CHALLENGE");
480 if (Utils->ChallengeResponse && (n != this->CapKeys.end()) && (Instance->FindModule("m_sha256.so")))
482 /* Challenge-response is on now */
483 this->SetTheirChallenge(n->second);
484 if (!this->GetTheirChallenge().empty() && (this->LinkState == CONNECTING))
486 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(OutboundPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
491 /* They didnt specify a challenge or we don't have m_sha256.so, we use plaintext */
492 if (this->LinkState == CONNECTING)
493 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+OutboundPass+" 0 :"+this->Instance->Config->ServerDesc);
498 this->SendError("CAPAB negotiation failed: "+reason);
502 else if ((params[0] == "MODULES") && (params.size() == 2))
504 if (!this->ModuleList.length())
506 this->ModuleList.append(params[1]);
510 this->ModuleList.append(",");
511 this->ModuleList.append(params[1]);
515 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
517 irc::tokenstream capabs(params[1]);
520 while ((more = capabs.GetToken(item)))
522 /* Process each key/value pair */
523 std::string::size_type equals = item.rfind('=');
524 if (equals != std::string::npos)
526 std::string var = item.substr(0, equals);
527 std::string value = item.substr(equals+1, item.length());
528 CapKeys[var] = value;
535 /** This function forces this server to quit, removing this server
536 * and any users on it (and servers and users below that, etc etc).
537 * It's very slow and pretty clunky, but luckily unless your network
538 * is having a REAL bad hair day, this function shouldnt be called
539 * too many times a month ;-)
541 void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
543 /* recursively squit the servers attached to 'Current'.
544 * We're going backwards so we don't remove users
545 * while we still need them ;)
547 for (unsigned int q = 0; q < Current->ChildCount(); q++)
549 TreeServer* recursive_server = Current->GetChild(q);
550 this->SquitServer(from,recursive_server);
552 /* Now we've whacked the kids, whack self */
554 num_lost_users += Current->QuitUsers(from);
557 /** This is a wrapper function for SquitServer above, which
558 * does some validation first and passes on the SQUIT to all
559 * other remaining servers.
561 void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
563 if ((Current) && (Current != Utils->TreeRoot))
565 Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
566 rmode.Send(Instance);
568 std::deque<std::string> params;
569 params.push_back(Current->GetName());
570 params.push_back(":"+reason);
571 Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
572 if (Current->GetParent() == Utils->TreeRoot)
574 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split: "+reason);
578 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
580 num_lost_servers = 0;
582 std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
583 SquitServer(from, Current);
585 Current->GetParent()->DelChild(Current);
587 this->Instance->SNO->WriteToSnoMask('l',"Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
590 Instance->Log(DEFAULT,"Squit from unknown server");
593 /** FMODE command - server mode with timestamp checks */
594 bool TreeSocket::ForceMode(const std::string &source, std::deque<std::string> ¶ms)
596 /* Chances are this is a 1.0 FMODE without TS */
597 if (params.size() < 3)
599 /* No modes were in the command, probably a channel with no modes set on it */
604 std::string sourceserv;
605 /* Are we dealing with an FMODE from a user, or from a server? */
606 userrec* who = this->Instance->FindNick(source);
609 /* FMODE from a user, set sourceserv to the users server name */
610 sourceserv = who->server;
614 /* FMODE from a server, create a fake user to receive mode feedback */
615 who = new userrec(this->Instance);
616 who->SetFd(FD_MAGIC_NUMBER);
617 smode = true; /* Setting this flag tells us we should free the userrec later */
618 sourceserv = source; /* Set sourceserv to the actual source string */
620 const char* modelist[64];
623 memset(&modelist,0,sizeof(modelist));
624 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
628 /* The timestamp is in this position.
629 * We don't want to pass that up to the
630 * server->client protocol!
632 TS = atoi(params[q].c_str());
636 /* Everything else is fine to append to the modelist */
637 modelist[n++] = params[q].c_str();
641 /* Extract the TS value of the object, either userrec or chanrec */
642 userrec* dst = this->Instance->FindNick(params[0]);
643 chanrec* chan = NULL;
651 chan = this->Instance->FindChan(params[0]);
657 /* Oops, channel doesnt exist! */
661 /* TS is equal or less: Merge the mode changes into ours and pass on.
665 if ((TS < ourTS) && (!dst))
666 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);
670 this->Instance->SendMode(modelist, n, who);
674 this->Instance->CallCommandHandler("MODE", modelist, n, who);
676 /* HOT POTATO! PASS IT ON! */
677 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
679 /* If the TS is greater than ours, we drop the mode and dont pass it anywhere.
688 /** FTOPIC command */
689 bool TreeSocket::ForceTopic(const std::string &source, std::deque<std::string> ¶ms)
691 if (params.size() != 4)
693 time_t ts = atoi(params[1].c_str());
694 std::string nsource = source;
695 chanrec* c = this->Instance->FindChan(params[0]);
698 if ((ts >= c->topicset) || (!*c->topic))
700 std::string oldtopic = c->topic;
701 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
702 strlcpy(c->setby,params[2].c_str(),127);
704 /* if the topic text is the same as the current topic,
705 * dont bother to send the TOPIC command out, just silently
706 * update the set time and set nick.
708 if (oldtopic != params[3])
710 userrec* user = this->Instance->FindNick(source);
713 c->WriteChannelWithServ(Instance->Config->ServerName, "TOPIC %s :%s", c->name, c->topic);
717 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
718 nsource = user->server;
720 /* all done, send it on its way */
721 params[3] = ":" + params[3];
722 Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
730 /** FJOIN, similar to TS6 SJOIN, but not quite. */
731 bool TreeSocket::ForceJoin(const std::string &source, std::deque<std::string> ¶ms)
733 /* 1.1 FJOIN works as follows:
735 * Each FJOIN is sent along with a timestamp, and the side with the lowest
736 * timestamp 'wins'. From this point on we will refer to this side as the
737 * winner. The side with the higher timestamp loses, from this point on we
738 * will call this side the loser or losing side. This should be familiar to
739 * anyone who's dealt with dreamforge or TS6 before.
741 * When two sides of a split heal and this occurs, the following things
744 * If the timestamps are exactly equal, both sides merge their privilages
745 * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
746 * re-created during a split, this is safe to do.
748 * If the timestamps are NOT equal, the losing side removes all of its
749 * modes from the channel, before introducing new users into the channel
750 * which are listed in the FJOIN command's parameters. The losing side then
751 * LOWERS its timestamp value of the channel to match that of the winning
752 * side, and the modes of the users of the winning side are merged in with
755 * The winning side on the other hand will ignore all user modes from the
756 * losing side, so only its own modes get applied. Life is simple for those
757 * who succeed at internets. :-)
759 * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
760 * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
761 * you ask? Well, quite simply because we don't need to. They'll be sent
762 * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
763 * the losing side sends any modes for the channel which shouldnt win,
764 * they wont as their timestamp will be too high :-)
767 if (params.size() < 3)
770 irc::modestacker modestack(true); /* Modes to apply from the users in the user list */
771 userrec* who = NULL; /* User we are currently checking */
772 std::string channel = params[0]; /* Channel name, as a string */
773 time_t TS = atoi(params[1].c_str()); /* Timestamp given to us for remote side */
774 irc::tokenstream users(params[2]); /* Users from the user list */
775 bool apply_other_sides_modes = true; /* True if we are accepting the other side's modes */
776 chanrec* chan = this->Instance->FindChan(channel); /* The channel we're sending joins to */
777 time_t ourTS = chan ? chan->age : Instance->Time(true)+600; /* The TS of our side of the link */
778 bool created = !chan; /* True if the channel doesnt exist here yet */
779 std::string item; /* One item in the list of nicks */
781 params[2] = ":" + params[2];
782 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
784 /* If our TS is less than theirs, we dont accept their modes */
786 apply_other_sides_modes = false;
788 /* Our TS greater than theirs, clear all our modes from the channel, accept theirs. */
791 std::deque<std::string> param_list;
792 if (Utils->AnnounceTSChange && chan)
793 chan->WriteChannelWithServ(Instance->Config->ServerName, "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
798 param_list.push_back(channel);
799 this->RemoveStatus(Instance->Config->ServerName, param_list);
803 /* Now, process every 'prefixes,nick' pair */
804 while (users.GetToken(item))
806 const char* usr = item.c_str();
809 const char* permissions = usr;
810 /* Iterate through all the prefix values, convert them from prefixes to mode letters */
812 while ((*permissions) && (*permissions != ','))
814 ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
816 modes = modes + mh->GetModeChar();
819 this->SendError(std::string("Invalid prefix '")+(*permissions)+"' in FJOIN");
825 /* Advance past the comma, to the nick */
828 /* Check the user actually exists */
829 who = this->Instance->FindNick(usr);
832 /* Check that the user's 'direction' is correct */
833 TreeServer* route_back_again = Utils->BestRouteTo(who->server);
834 if ((!route_back_again) || (route_back_again->GetSocket() != this))
837 /* Add any permissions this user had to the mode stack */
838 for (std::string::iterator x = modes.begin(); x != modes.end(); ++x)
839 modestack.Push(*x, who->nick);
841 chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "", TS);
845 Instance->Log(SPARSE,"Warning! Invalid user %s in FJOIN to channel %s IGNORED", usr, channel.c_str());
851 /* Flush mode stacker if we lost the FJOIN or had equal TS */
852 if (apply_other_sides_modes)
854 std::deque<std::string> stackresult;
855 const char* mode_junk[MAXMODES+1];
856 userrec* n = new userrec(Instance);
857 n->SetFd(FD_MAGIC_NUMBER);
858 mode_junk[0] = channel.c_str();
860 while (modestack.GetStackedLine(stackresult))
862 for (size_t j = 0; j < stackresult.size(); j++)
864 mode_junk[j+1] = stackresult[j].c_str();
866 Instance->SendMode(mode_junk, stackresult.size() + 1, n);
876 bool TreeSocket::IntroduceClient(const std::string &source, std::deque<std::string> ¶ms)
878 /** Do we have enough parameters:
879 * NICK age nick host dhost ident +modes ip :gecos
881 if (params.size() != 8)
883 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
887 time_t age = ConvToInt(params[0]);
888 const char* tempnick = params[1].c_str();
890 cmd_validation valid[] = { {"Nickname", 1, NICKMAX}, {"Hostname", 2, 64}, {"Displayed hostname", 3, 64}, {"Ident", 4, IDENTMAX}, {"GECOS", 7, MAXGECOS}, {"", 0, 0} };
892 TreeServer* remoteserver = Utils->FindServer(source);
895 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction (Unknown server "+source+")");
899 /* Check parameters for validity before introducing the client, discovered by dmb */
902 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction (Invalid TS?)");
905 for (size_t x = 0; valid[x].length; ++x)
907 if (params[valid[x].param].length() > valid[x].length)
909 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction (" + valid[x].item + " > " + ConvToStr(valid[x].length) + ")");
914 /** Our client looks ok, lets introduce it now
916 Instance->Log(DEBUG,"New remote client %s",tempnick);
917 user_hash::iterator iter = this->Instance->clientlist->find(tempnick);
919 if (iter != this->Instance->clientlist->end())
922 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
923 userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
927 userrec* _new = new userrec(this->Instance);
928 (*(this->Instance->clientlist))[tempnick] = _new;
929 _new->SetFd(FD_MAGIC_NUMBER);
930 strlcpy(_new->nick, tempnick,NICKMAX-1);
931 strlcpy(_new->host, params[2].c_str(),64);
932 strlcpy(_new->dhost, params[3].c_str(),64);
933 _new->server = this->Instance->FindServerNamePtr(source.c_str());
934 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
935 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
936 _new->registered = REG_ALL;
939 /* we need to remove the + from the modestring, so we can do our stuff */
940 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
941 if (pos_after_plus != std::string::npos)
942 params[5] = params[5].substr(pos_after_plus);
944 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
946 _new->modes[(*v)-65] = 1;
947 /* For each mode thats set, increase counter */
948 ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER);
953 /* now we've done with modes processing, put the + back for remote servers */
954 params[5] = "+" + params[5];
956 #ifdef SUPPORT_IP6LINKS
957 if (params[6].find_first_of(":") != std::string::npos)
958 _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
961 _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
963 Instance->AddGlobalClone(_new);
965 bool dosend = !(((this->Utils->quiet_bursts) && (this->bursting || Utils->FindRemoteBurstServer(remoteserver))) || (this->Instance->SilentULine(_new->server)));
968 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);
970 params[7] = ":" + params[7];
971 Utils->DoOneToAllButSender(source,"NICK", params, source);
973 // Increment the Source Servers User Count..
974 TreeServer* SourceServer = Utils->FindServer(source);
977 SourceServer->AddUserCount();
980 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
985 /** Send one or more FJOINs for a channel of users.
986 * If the length of a single line is more than 480-NICKMAX
987 * in length, it is split over multiple lines.
989 void TreeSocket::SendFJoins(TreeServer* Current, chanrec* c)
993 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
995 Instance->Log(DEBUG,"Sending FJOINs for %s", c->name);
998 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1000 char* ptr = list + dlen;
1002 CUList *ulist = c->GetUsers();
1003 std::string modes = "";
1004 std::string params = "";
1006 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1008 // The first parameter gets a : before it
1009 size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->first), i->first->nick);
1016 if (curlen > (480-NICKMAX))
1018 Instance->Log(DEBUG,"Flushing FJOIN buffer: %s", list);
1019 buffer.append(list).append("\r\n");
1020 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1027 Instance->Log(DEBUG,"%d users remaining to be flushed", list);
1031 Instance->Log(DEBUG,"Flushing final FJOIN buffer: %s", list);
1032 buffer.append(list).append("\r\n");
1035 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");
1038 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1040 int size = strlen(b->data) + 2;
1041 int currsize = linesize + size;
1042 if (currsize <= 350)
1045 params.append(" ").append(b->data);
1048 if ((params.length() >= MAXMODES) || (currsize > 350))
1050 /* Wrap at MAXMODES */
1051 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");
1058 /* Only send these if there are any */
1060 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
1062 this->WriteLine(buffer);
1065 /** Send G, Q, Z and E lines */
1066 void TreeSocket::SendXLines(TreeServer* Current)
1070 std::string n = this->Instance->Config->ServerName;
1071 const char* sn = n.c_str();
1072 /* Yes, these arent too nice looking, but they get the job done */
1073 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++)
1075 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);
1076 buffer.append(data);
1078 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++)
1080 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);
1081 buffer.append(data);
1083 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++)
1085 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);
1086 buffer.append(data);
1088 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++)
1090 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);
1091 buffer.append(data);
1093 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++)
1095 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);
1096 buffer.append(data);
1098 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++)
1100 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);
1101 buffer.append(data);
1103 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++)
1105 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);
1106 buffer.append(data);
1108 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++)
1110 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);
1111 buffer.append(data);
1114 if (!buffer.empty())
1115 this->WriteLine(buffer);
1118 /** Send channel modes and topics */
1119 void TreeSocket::SendChannelModes(TreeServer* Current)
1122 std::deque<std::string> list;
1123 std::string n = this->Instance->Config->ServerName;
1124 const char* sn = n.c_str();
1125 Instance->Log(DEBUG,"Sending channels and modes, %d to send", this->Instance->chanlist->size());
1126 for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
1128 SendFJoins(Current, c->second);
1129 if (*c->second->topic)
1131 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1132 this->WriteLine(data);
1134 FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
1136 c->second->GetExtList(list);
1137 for (unsigned int j = 0; j < list.size(); j++)
1139 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
1144 /** send all users and their oper state/modes */
1145 void TreeSocket::SendUsers(TreeServer* Current)
1148 std::deque<std::string> list;
1149 std::string dataline;
1150 for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
1152 if (u->second->registered == REG_ALL)
1154 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(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);
1155 this->WriteLine(data);
1156 if (*u->second->oper)
1158 snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
1159 this->WriteLine(data);
1161 if (*u->second->awaymsg)
1163 snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
1164 this->WriteLine(data);
1168 for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
1170 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
1172 u->second->GetExtList(list);
1173 for (unsigned int j = 0; j < list.size(); j++)
1175 FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
1180 /** This function is called when we want to send a netburst to a local
1181 * server. There is a set order we must do this, because for example
1182 * users require their servers to exist, and channels require their
1183 * users to exist. You get the idea.
1185 void TreeSocket::DoBurst(TreeServer* s)
1187 std::string name = s->GetName();
1188 std::string burst = "BURST "+ConvToStr(Instance->Time(true));
1189 std::string endburst = "ENDBURST";
1190 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s).", name.c_str(), this->GetTheirChallenge().empty() ? "plaintext password" : "SHA256-HMAC challenge-response");
1191 this->WriteLine(burst);
1192 /* send our version string */
1193 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1194 /* Send server tree */
1195 this->SendServers(Utils->TreeRoot,s,1);
1196 /* Send users and their oper status */
1198 /* Send everything else (channel modes, xlines etc) */
1199 this->SendChannelModes(s);
1200 this->SendXLines(s);
1201 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
1202 this->WriteLine(endburst);
1203 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1206 /** This function is called when we receive data from a remote
1207 * server. We buffer the data in a std::string (it doesnt stay
1208 * there for long), reading using InspSocket::Read() which can
1209 * read up to 16 kilobytes in one operation.
1211 * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1212 * THE SOCKET OBJECT FOR US.
1214 bool TreeSocket::OnDataReady()
1216 char* data = this->Read();
1217 /* Check that the data read is a valid pointer and it has some content */
1220 this->in_buffer.append(data);
1221 /* While there is at least one new line in the buffer,
1222 * do something useful (we hope!) with it.
1224 while (in_buffer.find("\n") != std::string::npos)
1226 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1227 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1228 /* Use rfind here not find, as theres more
1229 * chance of the \r being near the end of the
1230 * string, not the start.
1232 if (ret.find("\r") != std::string::npos)
1233 ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1234 /* Process this one, abort if it
1235 * didnt return true.
1237 if (!this->ProcessLine(ret))
1244 /* EAGAIN returns an empty but non-NULL string, so this
1245 * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1247 return (data && !*data);