1 #include "configreader.h"
5 #include "commands/cmd_whois.h"
6 #include "commands/cmd_stats.h"
11 #include "transport.h"
12 #include "socketengine.h"
14 #include "m_spanningtree/main.h"
15 #include "m_spanningtree/utils.h"
16 #include "m_spanningtree/treeserver.h"
17 #include "m_spanningtree/link.h"
18 #include "m_spanningtree/treesocket.h"
19 #include "m_spanningtree/resolvers.h"
20 #include "m_spanningtree/handshaketimer.h"
22 /* $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 */
24 /** Because most of the I/O gubbins are encapsulated within
25 * InspSocket, we just call the superclass constructor for
26 * most of the action, and append a few of our own values
29 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod)
30 : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
33 this->LinkState = LISTENER;
34 if (listening && Hook)
35 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
38 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)
39 : InspSocket(SI, host, port, listening, maxtime, bindto), Utils(Util), Hook(HookMod)
42 this->LinkState = CONNECTING;
44 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
47 /** When a listening socket gives us a new file descriptor,
48 * we must associate it with a socket without creating a new
49 * connection. This constructor is used for this purpose.
51 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod)
52 : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
54 this->LinkState = WAIT_AUTH_1;
55 /* If we have a transport module hooked to the parent, hook the same module to this
56 * socket, and set a timer waiting for handshake before we send CAPAB etc.
60 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
61 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils));
65 /* Otherwise, theres no lower layer transport in plain TCP/IP,
66 * so just send the capabilities right now.
68 this->SendCapabilities();
72 ServerState TreeSocket::GetLinkState()
74 return this->LinkState;
77 Module* TreeSocket::GetHook()
82 TreeSocket::~TreeSocket()
85 InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
88 /** When an outbound connection finishes connecting, we receive
89 * this event, and must send our SERVER string to the other
90 * side. If the other side is happy, as outlined in the server
91 * to server docs on the inspircd.org site, the other side
92 * will then send back its own server string.
94 bool TreeSocket::OnConnected()
96 if (this->LinkState == CONNECTING)
98 /* we do not need to change state here. */
99 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
101 if (x->Name == this->myhost)
103 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
106 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
107 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2");
110 this->SendCapabilities();
111 /* found who we're supposed to be connecting to, send the neccessary gubbins. */
113 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils));
115 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
120 /* There is a (remote) chance that between the /CONNECT and the connection
121 * being accepted, some muppet has removed the <link> block and rehashed.
122 * If that happens the connection hangs here until it's closed. Unlikely
123 * and rather harmless.
125 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
129 void TreeSocket::OnError(InspSocketError e)
131 /* We don't handle this method, because all our
132 * dirty work is done in OnClose() (see below)
133 * which is still called on error conditions too.
135 if (e == I_ERR_CONNECT)
137 this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
138 Link* MyLink = Utils->FindLink(myhost);
140 Utils->DoFailOver(MyLink);
144 int TreeSocket::OnDisconnect()
146 /* For the same reason as above, we don't
147 * handle OnDisconnect()
152 /** Recursively send the server tree with distances as hops.
153 * This is used during network burst to inform the other server
154 * (and any of ITS servers too) of what servers we know about.
155 * If at any point any of these servers already exist on the other
156 * end, our connection may be terminated. The hopcounts given
157 * by this function are relative, this doesn't matter so long as
158 * they are all >1, as all the remote servers re-calculate them
159 * to be relative too, with themselves as hop 0.
161 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
164 for (unsigned int q = 0; q < Current->ChildCount(); q++)
166 TreeServer* recursive_server = Current->GetChild(q);
167 if (recursive_server != s)
169 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
170 this->WriteLine(command);
171 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
172 /* down to next level */
173 this->SendServers(recursive_server, s, hops+1);
178 std::string TreeSocket::MyCapabilities()
180 std::vector<std::string> modlist;
181 std::string capabilities = "";
182 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
184 if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
185 modlist.push_back(this->Instance->Config->module_names[i]);
187 sort(modlist.begin(),modlist.end());
188 for (unsigned int i = 0; i < modlist.size(); i++)
191 capabilities = capabilities + ",";
192 capabilities = capabilities + modlist[i];
197 void TreeSocket::SendCapabilities()
199 irc::commasepstream modulelist(MyCapabilities());
200 this->WriteLine("CAPAB START");
202 /* Send module names, split at 509 length */
203 std::string item = "*";
204 std::string line = "CAPAB MODULES ";
205 while ((item = modulelist.GetToken()) != "")
207 if (line.length() + item.length() + 1 > 509)
209 this->WriteLine(line);
210 line = "CAPAB MODULES ";
213 if (line != "CAPAB MODULES ")
218 if (line != "CAPAB MODULES ")
219 this->WriteLine(line);
226 #ifdef SUPPORT_IP6LINKS
229 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));
231 this->WriteLine("CAPAB END");
234 /* Check a comma seperated list for an item */
235 bool TreeSocket::HasItem(const std::string &list, const std::string &item)
237 irc::commasepstream seplist(list);
238 std::string item2 = "*";
239 while ((item2 = seplist.GetToken()) != "")
247 /* Isolate and return the elements that are different between two comma seperated lists */
248 std::string TreeSocket::ListDifference(const std::string &one, const std::string &two)
250 irc::commasepstream list_one(one);
251 std::string item = "*";
252 std::string result = "";
253 while ((item = list_one.GetToken()) != "")
255 if (!HasItem(two, item))
264 bool TreeSocket::Capab(const std::deque<std::string> ¶ms)
266 if (params.size() < 1)
268 this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
271 if (params[0] == "START")
273 this->ModuleList = "";
274 this->CapKeys.clear();
276 else if (params[0] == "END")
278 std::string reason = "";
280 #ifdef SUPPORT_IP6LINKS
283 /* Compare ModuleList and check CapKeys...
284 * Maybe this could be tidier? -- Brain
286 if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
288 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
291 diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
295 diff = "this server:" + diff;
297 if (diff.length() == 12)
298 reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
300 reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
302 if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
303 reason = "We don't both support linking to IPV6 servers";
304 if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
305 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
306 if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
307 reason = "Maximum nickname lengths differ or remote nickname length not specified";
308 if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
310 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
312 reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
316 reason = "Protocol version not specified";
319 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))))
320 reason = "We don't both have halfop support enabled/disabled identically";
321 if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
322 reason = "Maximum ident lengths differ or remote ident length not specified";
323 if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
324 reason = "Maximum channel lengths differ or remote channel length not specified";
325 if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
326 reason = "Maximum modes per line differ or remote modes per line not specified";
327 if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
328 reason = "Maximum quit lengths differ or remote quit length not specified";
329 if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
330 reason = "Maximum topic lengths differ or remote topic length not specified";
331 if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
332 reason = "Maximum kick lengths differ or remote kick length not specified";
333 if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
334 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
335 if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
336 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
339 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
343 else if ((params[0] == "MODULES") && (params.size() == 2))
345 if (!this->ModuleList.length())
347 this->ModuleList.append(params[1]);
351 this->ModuleList.append(",");
352 this->ModuleList.append(params[1]);
356 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
358 irc::tokenstream capabs(params[1]);
359 std::string item = "*";
360 while ((item = capabs.GetToken()) != "")
362 /* Process each key/value pair */
363 std::string::size_type equals = item.rfind('=');
364 if (equals != std::string::npos)
366 std::string var = item.substr(0, equals);
367 std::string value = item.substr(equals+1, item.length());
368 CapKeys[var] = value;
375 /** This function forces this server to quit, removing this server
376 * and any users on it (and servers and users below that, etc etc).
377 * It's very slow and pretty clunky, but luckily unless your network
378 * is having a REAL bad hair day, this function shouldnt be called
379 * too many times a month ;-)
381 void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
383 /* recursively squit the servers attached to 'Current'.
384 * We're going backwards so we don't remove users
385 * while we still need them ;)
387 for (unsigned int q = 0; q < Current->ChildCount(); q++)
389 TreeServer* recursive_server = Current->GetChild(q);
390 this->SquitServer(from,recursive_server);
392 /* Now we've whacked the kids, whack self */
394 num_lost_users += Current->QuitUsers(from);
397 /** This is a wrapper function for SquitServer above, which
398 * does some validation first and passes on the SQUIT to all
399 * other remaining servers.
401 void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
403 if ((Current) && (Current != Utils->TreeRoot))
405 Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
406 rmode.Send(Instance);
408 std::deque<std::string> params;
409 params.push_back(Current->GetName());
410 params.push_back(":"+reason);
411 Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
412 if (Current->GetParent() == Utils->TreeRoot)
414 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
418 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
420 num_lost_servers = 0;
422 std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
423 SquitServer(from, Current);
425 Current->GetParent()->DelChild(Current);
427 this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
431 Instance->Log(DEFAULT,"Squit from unknown server");
435 /** FMODE command - server mode with timestamp checks */
436 bool TreeSocket::ForceMode(const std::string &source, std::deque<std::string> ¶ms)
438 /* Chances are this is a 1.0 FMODE without TS */
439 if (params.size() < 3)
441 /* No modes were in the command, probably a channel with no modes set on it */
446 std::string sourceserv;
447 /* Are we dealing with an FMODE from a user, or from a server? */
448 userrec* who = this->Instance->FindNick(source);
451 /* FMODE from a user, set sourceserv to the users server name */
452 sourceserv = who->server;
456 /* FMODE from a server, create a fake user to receive mode feedback */
457 who = new userrec(this->Instance);
458 who->SetFd(FD_MAGIC_NUMBER);
459 smode = true; /* Setting this flag tells us we should free the userrec later */
460 sourceserv = source; /* Set sourceserv to the actual source string */
462 const char* modelist[64];
465 memset(&modelist,0,sizeof(modelist));
466 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
470 /* The timestamp is in this position.
471 * We don't want to pass that up to the
472 * server->client protocol!
474 TS = atoi(params[q].c_str());
478 /* Everything else is fine to append to the modelist */
479 modelist[n++] = params[q].c_str();
483 /* Extract the TS value of the object, either userrec or chanrec */
484 userrec* dst = this->Instance->FindNick(params[0]);
485 chanrec* chan = NULL;
493 chan = this->Instance->FindChan(params[0]);
499 /* Oops, channel doesnt exist! */
503 /* TS is equal or less: Merge the mode changes into ours and pass on.
509 this->Instance->SendMode(modelist, n, who);
513 this->Instance->CallCommandHandler("MODE", modelist, n, who);
515 /* HOT POTATO! PASS IT ON! */
516 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
518 /* If the TS is greater than ours, we drop the mode and dont pass it anywhere.
527 /** FTOPIC command */
528 bool TreeSocket::ForceTopic(const std::string &source, std::deque<std::string> ¶ms)
530 if (params.size() != 4)
532 time_t ts = atoi(params[1].c_str());
533 std::string nsource = source;
534 chanrec* c = this->Instance->FindChan(params[0]);
537 if ((ts >= c->topicset) || (!*c->topic))
539 std::string oldtopic = c->topic;
540 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
541 strlcpy(c->setby,params[2].c_str(),127);
543 /* if the topic text is the same as the current topic,
544 * dont bother to send the TOPIC command out, just silently
545 * update the set time and set nick.
547 if (oldtopic != params[3])
549 userrec* user = this->Instance->FindNick(source);
552 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
556 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
557 nsource = user->server;
559 /* all done, send it on its way */
560 params[3] = ":" + params[3];
561 Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
569 /** FJOIN, similar to TS6 SJOIN, but not quite. */
570 bool TreeSocket::ForceJoin(const std::string &source, std::deque<std::string> ¶ms)
572 /* 1.1 FJOIN works as follows:
574 * Each FJOIN is sent along with a timestamp, and the side with the lowest
575 * timestamp 'wins'. From this point on we will refer to this side as the
576 * winner. The side with the higher timestamp loses, from this point on we
577 * will call this side the loser or losing side. This should be familiar to
578 * anyone who's dealt with dreamforge or TS6 before.
580 * When two sides of a split heal and this occurs, the following things
583 * If the timestamps are exactly equal, both sides merge their privilages
584 * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
585 * re-created during a split, this is safe to do.
588 * If the timestamps are NOT equal, the losing side removes all privilage
589 * modes from all of its users that currently exist in the channel, before
590 * introducing new users into the channel which are listed in the FJOIN
591 * command's parameters. This means, all modes +ohv, and privilages added
592 * by modules, such as +qa. The losing side then LOWERS its timestamp value
593 * of the channel to match that of the winning side, and the modes of the
594 * users of the winning side are merged in with the losing side. The loser
595 * then sends out a set of FMODE commands which 'confirm' that it just
596 * removed all privilage modes from its existing users, which allows for
597 * services packages to still work correctly without needing to know the
598 * timestamping rules which InspIRCd follows. In TS6 servers this is always
599 * a problem, and services packages must contain code which explicitly
600 * behaves as TS6 does, removing ops from the losing side of a split where
601 * neccessary within its internal records, as this state information is
602 * not explicitly echoed out in that protocol.
604 * The winning side on the other hand will ignore all user modes from the
605 * losing side, so only its own modes get applied. Life is simple for those
606 * who succeed at internets. :-)
608 * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
609 * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
610 * you ask? Well, quite simply because we don't need to. They'll be sent
611 * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
612 * the losing side sends any modes for the channel which shouldnt win,
613 * they wont as their timestamp will be too high :-)
616 if (params.size() < 3)
619 char first[MAXBUF]; /* The first parameter of the mode command */
620 char modestring[MAXBUF]; /* The mode sequence (2nd parameter) of the mode command */
621 char* mode_users[127]; /* The values used by the mode command */
622 memset(&mode_users,0,sizeof(mode_users)); /* Initialize mode parameters */
623 mode_users[0] = first; /* Set this up to be our on-stack value */
624 mode_users[1] = modestring; /* Same here as above */
625 strcpy(modestring,"+"); /* Initialize the mode sequence to just '+' */
626 unsigned int modectr = 2; /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
628 userrec* who = NULL; /* User we are currently checking */
629 std::string channel = params[0]; /* Channel name, as a string */
630 time_t TS = atoi(params[1].c_str()); /* Timestamp given to us for remote side */
631 bool created = false;
633 /* Try and find the channel */
634 chanrec* chan = this->Instance->FindChan(channel);
636 /* Initialize channel name in the mode parameters */
637 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
639 /* default TS is a high value, which if we dont have this
640 * channel will let the other side apply their modes.
642 time_t ourTS = Instance->Time(true)+600;
643 /* Does this channel exist? if it does, get its REAL timestamp */
647 created = true; /* don't perform deops, and set TS to correct time after processing. */
649 /* do this first, so our mode reversals are correctly received by other servers
650 * if there is a TS collision.
652 params[2] = ":" + params[2];
653 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
655 /* In 1.1, if they have the newer channel, we immediately clear
656 * all status modes from our users. We then accept their modes.
657 * If WE have the newer channel its the other side's job to do this.
658 * Note that this causes the losing server to send out confirming
663 std::deque<std::string> param_list;
664 /* Lower the TS here */
665 if (Utils->AnnounceTSChange && chan)
666 chan->WriteChannelWithServ(Instance->Config->ServerName,
667 "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
669 /* Zap all the privilage modes on our side, if the channel exists here */
672 param_list.push_back(channel);
675 this->RemoveStatus(Instance->Config->ServerName, param_list);
678 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
679 irc::tokenstream users(params[2]);
680 std::string item = "*";
682 /* Now, process every 'prefixes,nick' pair */
686 item = users.GetToken();
687 const char* usr = item.c_str();
688 /* Safety check just to make sure someones not sent us an FJOIN full of spaces
689 * (is this even possible?) */
692 const char* permissions = usr;
694 char* nm = new char[MAXBUF];
696 /* Iterate through all the prefix values, convert them from prefixes
697 * to mode letters, and append them to the mode sequence
699 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
701 ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
704 /* This is a valid prefix */
706 *tnm++ = mh->GetModeChar();
710 /* Not a valid prefix...
711 * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
713 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
714 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
720 /* Null terminate modes */
722 /* Advance past the comma, to the nick */
724 /* Check the user actually exists */
725 who = this->Instance->FindNick(usr);
728 /* Check that the user's 'direction' is correct
729 * based on the server sending the FJOIN. We must
730 * check each nickname in turn, because the origin of
731 * the FJOIN may be different to the origin of the nicks
732 * in the command itself.
734 TreeServer* route_back_again = Utils->BestRouteTo(who->server);
735 if ((!route_back_again) || (route_back_again->GetSocket() != this))
737 /* Oh dear oh dear. */
742 /* NOTE: Moved this below the fake direction check, so that modes
743 * arent put into the mode list for users that were collided, and
744 * may reconnect from the other side or our side before the split
748 /* Did they get any modes? How many times? */
749 strlcat(modestring, nm, MAXBUF);
750 for (int k = 0; k < ntimes; k++)
751 mode_users[modectr++] = strdup(usr);
752 /* Free temporary buffer used for mode sequence */
755 /* Finally, we can actually place the user into the channel.
756 * We're sure its right. Final answer, phone a friend.
758 chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
759 /* Have we already queued up MAXMODES modes with parameters
760 * (+qaohv) ready to be sent to the server?
762 if (modectr >= (MAXMODES-1))
764 /* Only actually give the users any status if we lost
765 * the FJOIN or drew (equal timestamps).
766 * It isn't actually possible for ourTS to be > TS here,
767 * only possible to actually have ourTS == TS, or
768 * ourTS < TS, because if we lost, we already lowered
769 * our TS above before we entered this loop. We only
770 * check >= as a safety measure, in case someone stuffed
771 * up. If someone DID stuff up, it was most likely me.
772 * Note: I do not like baseball bats in the face...
776 this->Instance->SendMode((const char**)mode_users,modectr,who);
778 /* Something stuffed up, and for some reason, the timestamp is
779 * NOT lowered right now and should be. Lower it. Usually this
780 * code won't be executed, doubtless someone will remove it some
785 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
791 /* Reset all this back to defaults, and
792 * free any ram we have left allocated.
794 strcpy(mode_users[1],"+");
795 for (unsigned int f = 2; f < modectr; f++)
802 /* Remember to free this */
804 /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
805 * We don't try to process the nickname here (that WOULD cause a segfault because
806 * we'd be playing with null pointers) however, we DO pass the nickname on, just
807 * in case somehow we're desynched, so that other users which might be able to see
808 * the nickname get their fair chance to process it.
810 Instance->Log(SPARSE,"Warning! Invalid user %s in FJOIN to channel %s IGNORED", usr, channel.c_str());
816 /* there werent enough modes built up to flush it during FJOIN,
817 * or, there are a number left over. flush them out.
819 if ((modectr > 2) && (who) && (chan))
823 /* Our channel is newer than theirs. Evil deeds must be afoot. */
824 this->Instance->SendMode((const char**)mode_users,modectr,who);
825 /* Yet again, we can't actually get a true value here, if everything else
826 * is working as it should.
830 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
836 /* Free anything we have left to free */
837 for (unsigned int f = 2; f < modectr; f++)
840 /* if we newly created the channel, set it's TS properly. */
843 /* find created channel .. */
844 chan = this->Instance->FindChan(channel);
846 /* w00t said this shouldnt be needed but it is.
847 * This isnt strictly true, as chan can be NULL
848 * if a nick collision has occured and therefore
849 * the channel was never created.
853 /* All done. That wasnt so bad was it, you can wipe
854 * the sweat from your forehead now. :-)
860 bool TreeSocket::IntroduceClient(const std::string &source, std::deque<std::string> ¶ms)
862 if (params.size() < 8)
864 if (params.size() > 8)
866 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
869 // NICK age nick host dhost ident +modes ip :gecos
871 time_t age = atoi(params[0].c_str());
873 const char* tempnick = params[1].c_str();
874 Instance->Log(DEBUG,"New remote client %s",tempnick);
876 user_hash::iterator iter = this->Instance->clientlist->find(tempnick);
878 if (iter != this->Instance->clientlist->end())
881 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
882 userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
886 userrec* _new = new userrec(this->Instance);
887 (*(this->Instance->clientlist))[tempnick] = _new;
888 _new->SetFd(FD_MAGIC_NUMBER);
889 strlcpy(_new->nick, tempnick,NICKMAX-1);
890 strlcpy(_new->host, params[2].c_str(),63);
891 strlcpy(_new->dhost, params[3].c_str(),63);
892 _new->server = this->Instance->FindServerNamePtr(source.c_str());
893 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
894 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
895 _new->registered = REG_ALL;
899 * we need to remove the + from the modestring, so we can do our stuff
901 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
902 if (pos_after_plus != std::string::npos)
903 params[5] = params[5].substr(pos_after_plus);
905 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
907 _new->modes[(*v)-65] = 1;
908 /* For each mode thats set, increase counter */
909 ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER);
914 /* now we've done with modes processing, put the + back for remote servers */
915 params[5] = "+" + params[5];
917 #ifdef SUPPORT_IP6LINKS
918 if (params[6].find_first_of(":") != std::string::npos)
919 _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
922 _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
924 Instance->AddGlobalClone(_new);
925 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
927 params[7] = ":" + params[7];
928 Utils->DoOneToAllButSender(source,"NICK", params, source);
930 // Increment the Source Servers User Count..
931 TreeServer* SourceServer = Utils->FindServer(source);
934 SourceServer->AddUserCount();
937 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
942 /** Send one or more FJOINs for a channel of users.
943 * If the length of a single line is more than 480-NICKMAX
944 * in length, it is split over multiple lines.
946 void TreeSocket::SendFJoins(TreeServer* Current, chanrec* c)
950 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
953 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
955 char* ptr = list + dlen;
957 CUList *ulist = c->GetUsers();
958 std::string modes = "";
959 std::string params = "";
961 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
963 // The first parameter gets a : before it
964 size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
971 if (curlen > (480-NICKMAX))
973 buffer.append(list).append("\r\n");
974 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
982 buffer.append(list).append("\r\n");
984 /* Sorry for the hax. Because newly created channels assume +nt,
985 * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes.
987 bool inverted = false;
988 if (!c->IsModeSet('n'))
993 if (!c->IsModeSet('t'))
1003 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");
1006 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1008 int size = strlen(b->data) + 2;
1009 int currsize = linesize + size;
1010 if (currsize <= 350)
1013 params.append(" ").append(b->data);
1016 if ((params.length() >= MAXMODES) || (currsize > 350))
1018 /* Wrap at MAXMODES */
1019 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");
1026 /* Only send these if there are any */
1028 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
1030 this->WriteLine(buffer);
1033 /** Send G, Q, Z and E lines */
1034 void TreeSocket::SendXLines(TreeServer* Current)
1038 std::string n = this->Instance->Config->ServerName;
1039 const char* sn = n.c_str();
1040 /* Yes, these arent too nice looking, but they get the job done */
1041 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++)
1043 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);
1044 buffer.append(data);
1046 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++)
1048 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);
1049 buffer.append(data);
1051 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++)
1053 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);
1054 buffer.append(data);
1056 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++)
1058 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);
1059 buffer.append(data);
1061 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++)
1063 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);
1064 buffer.append(data);
1066 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++)
1068 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);
1069 buffer.append(data);
1071 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++)
1073 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);
1074 buffer.append(data);
1076 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++)
1078 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);
1079 buffer.append(data);
1082 if (!buffer.empty())
1083 this->WriteLine(buffer);
1086 /** Send channel modes and topics */
1087 void TreeSocket::SendChannelModes(TreeServer* Current)
1090 std::deque<std::string> list;
1091 std::string n = this->Instance->Config->ServerName;
1092 const char* sn = n.c_str();
1093 for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
1095 SendFJoins(Current, c->second);
1096 if (*c->second->topic)
1098 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1099 this->WriteLine(data);
1101 FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
1103 c->second->GetExtList(list);
1104 for (unsigned int j = 0; j < list.size(); j++)
1106 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
1111 /** send all users and their oper state/modes */
1112 void TreeSocket::SendUsers(TreeServer* Current)
1115 std::deque<std::string> list;
1116 std::string dataline;
1117 for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
1119 if (u->second->registered == REG_ALL)
1121 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);
1122 this->WriteLine(data);
1123 if (*u->second->oper)
1125 snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
1126 this->WriteLine(data);
1128 if (*u->second->awaymsg)
1130 snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
1131 this->WriteLine(data);
1133 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
1135 u->second->GetExtList(list);
1137 for (unsigned int j = 0; j < list.size(); j++)
1139 FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
1145 /** This function is called when we want to send a netburst to a local
1146 * server. There is a set order we must do this, because for example
1147 * users require their servers to exist, and channels require their
1148 * users to exist. You get the idea.
1150 void TreeSocket::DoBurst(TreeServer* s)
1152 std::string burst = "BURST "+ConvToStr(Instance->Time(true));
1153 std::string endburst = "ENDBURST";
1154 // Because by the end of the netburst, it could be gone!
1155 std::string name = s->GetName();
1156 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
1157 this->WriteLine(burst);
1158 /* send our version string */
1159 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1160 /* Send server tree */
1161 this->SendServers(Utils->TreeRoot,s,1);
1162 /* Send users and their oper status */
1164 /* Send everything else (channel modes, xlines etc) */
1165 this->SendChannelModes(s);
1166 this->SendXLines(s);
1167 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
1168 this->WriteLine(endburst);
1169 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1172 /** This function is called when we receive data from a remote
1173 * server. We buffer the data in a std::string (it doesnt stay
1174 * there for long), reading using InspSocket::Read() which can
1175 * read up to 16 kilobytes in one operation.
1177 * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1178 * THE SOCKET OBJECT FOR US.
1180 bool TreeSocket::OnDataReady()
1182 char* data = this->Read();
1183 /* Check that the data read is a valid pointer and it has some content */
1186 this->in_buffer.append(data);
1187 /* While there is at least one new line in the buffer,
1188 * do something useful (we hope!) with it.
1190 while (in_buffer.find("\n") != std::string::npos)
1192 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1193 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1194 /* Use rfind here not find, as theres more
1195 * chance of the \r being near the end of the
1196 * string, not the start.
1198 if (ret.find("\r") != std::string::npos)
1199 ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1200 /* Process this one, abort if it
1201 * didnt return true.
1203 if (!this->ProcessLine(ret))
1210 /* EAGAIN returns an empty but non-NULL string, so this
1211 * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1213 return (data && !*data);