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 */
38 /** Because most of the I/O gubbins are encapsulated within
39 * InspSocket, we just call the superclass constructor for
40 * most of the action, and append a few of our own values
43 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod)
44 : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
47 this->LinkState = LISTENER;
48 theirchallenge = ourchallenge = "";
49 if (listening && Hook)
50 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
53 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)
54 : InspSocket(SI, host, port, listening, maxtime, bindto), Utils(Util), Hook(HookMod)
57 theirchallenge = ourchallenge = "";
58 this->LinkState = CONNECTING;
60 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
63 /** When a listening socket gives us a new file descriptor,
64 * we must associate it with a socket without creating a new
65 * connection. This constructor is used for this purpose.
67 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod)
68 : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
70 this->LinkState = WAIT_AUTH_1;
71 theirchallenge = ourchallenge = "";
72 /* If we have a transport module hooked to the parent, hook the same module to this
73 * socket, and set a timer waiting for handshake before we send CAPAB etc.
76 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
78 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils));
81 ServerState TreeSocket::GetLinkState()
83 return this->LinkState;
86 Module* TreeSocket::GetHook()
91 TreeSocket::~TreeSocket()
94 InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
97 const std::string& TreeSocket::GetOurChallenge()
99 return this->ourchallenge;
102 void TreeSocket::SetOurChallenge(const std::string &c)
104 this->ourchallenge = c;
107 const std::string& TreeSocket::GetTheirChallenge()
109 return this->theirchallenge;
112 void TreeSocket::SetTheirChallenge(const std::string &c)
114 this->theirchallenge = c;
117 std::string TreeSocket::MakePass(const std::string &password, const std::string &challenge)
119 /* This is a simple (maybe a bit hacky?) HMAC algorithm, thanks to jilles for
120 * suggesting the use of HMAC to secure the password against various attacks.
122 * Note: If m_sha256.so is not loaded, we MUST fall back to plaintext with no
123 * HMAC challenge/response.
125 Module* sha256 = Instance->FindModule("m_sha256.so");
126 if (Utils->ChallengeResponse && sha256 && !challenge.empty())
128 /* XXX: This is how HMAC is supposed to be done:
130 * sha256( (pass xor 0x5c) + sha256((pass xor 0x36) + m) )
132 * Note that we are encoding the hex hash, not the binary
133 * output of the hash which is slightly different to standard.
135 * Don't ask me why its always 0x5c and 0x36... it just is.
137 std::string hmac1, hmac2;
139 for (size_t n = 0; n < password.length(); n++)
141 hmac1 += static_cast<char>(password[n] ^ 0x5C);
142 hmac2 += static_cast<char>(password[n] ^ 0x36);
145 HashResetRequest(Utils->Creator, sha256).Send();
146 hmac2 = HashSumRequest(Utils->Creator, sha256, hmac2).Send();
148 HashResetRequest(Utils->Creator, sha256).Send();
149 std::string hmac = hmac1 + hmac2 + challenge;
150 hmac = HashSumRequest(Utils->Creator, sha256, hmac).Send();
152 return "HMAC-SHA256:"+ hmac;
154 else if (!challenge.empty() && !sha256)
155 Instance->Log(DEFAULT,"Not authenticating to server using SHA256/HMAC because we don't have m_sha256 loaded!");
160 /** When an outbound connection finishes connecting, we receive
161 * this event, and must send our SERVER string to the other
162 * side. If the other side is happy, as outlined in the server
163 * to server docs on the inspircd.org site, the other side
164 * will then send back its own server string.
166 bool TreeSocket::OnConnected()
168 if (this->LinkState == CONNECTING)
170 /* we do not need to change state here. */
171 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
173 if (x->Name == this->myhost)
175 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
178 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
179 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2");
181 this->OutboundPass = x->SendPass;
182 /* found who we're supposed to be connecting to, send the neccessary gubbins. */
183 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils));
188 /* There is a (remote) chance that between the /CONNECT and the connection
189 * being accepted, some muppet has removed the <link> block and rehashed.
190 * If that happens the connection hangs here until it's closed. Unlikely
191 * and rather harmless.
193 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
197 void TreeSocket::OnError(InspSocketError e)
199 /* We don't handle this method, because all our
200 * dirty work is done in OnClose() (see below)
201 * which is still called on error conditions too.
203 if (e == I_ERR_CONNECT)
205 this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
206 Link* MyLink = Utils->FindLink(myhost);
208 Utils->DoFailOver(MyLink);
212 int TreeSocket::OnDisconnect()
214 /* For the same reason as above, we don't
215 * handle OnDisconnect()
220 /** Recursively send the server tree with distances as hops.
221 * This is used during network burst to inform the other server
222 * (and any of ITS servers too) of what servers we know about.
223 * If at any point any of these servers already exist on the other
224 * end, our connection may be terminated. The hopcounts given
225 * by this function are relative, this doesn't matter so long as
226 * they are all >1, as all the remote servers re-calculate them
227 * to be relative too, with themselves as hop 0.
229 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
232 for (unsigned int q = 0; q < Current->ChildCount(); q++)
234 TreeServer* recursive_server = Current->GetChild(q);
235 if (recursive_server != s)
237 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
238 this->WriteLine(command);
239 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
240 /* down to next level */
241 this->SendServers(recursive_server, s, hops+1);
246 std::string TreeSocket::MyCapabilities()
248 std::vector<std::string> modlist;
249 std::string capabilities = "";
250 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
252 if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
253 modlist.push_back(this->Instance->Config->module_names[i]);
255 sort(modlist.begin(),modlist.end());
256 for (unsigned int i = 0; i < modlist.size(); i++)
259 capabilities = capabilities + ",";
260 capabilities = capabilities + modlist[i];
265 std::string TreeSocket::RandString(unsigned int length)
267 char* randombuf = new char[length+1];
269 int fd = open("/dev/urandom", O_RDONLY, 0);
273 read(fd, randombuf, length);
278 for (unsigned int i = 0; i < length; i++)
279 randombuf[i] = rand();
282 for (unsigned int i = 0; i < length; i++)
283 out += static_cast<char>((randombuf[i] & 0x7F) | 0x21);
289 void TreeSocket::SendCapabilities()
291 irc::commasepstream modulelist(MyCapabilities());
292 this->WriteLine("CAPAB START");
294 /* Send module names, split at 509 length */
295 std::string item = "*";
296 std::string line = "CAPAB MODULES ";
297 while ((item = modulelist.GetToken()) != "")
299 if (line.length() + item.length() + 1 > 509)
301 this->WriteLine(line);
302 line = "CAPAB MODULES ";
305 if (line != "CAPAB MODULES ")
310 if (line != "CAPAB MODULES ")
311 this->WriteLine(line);
318 #ifdef SUPPORT_IP6LINKS
322 /* Do we have sha256 available? If so, we send a challenge */
323 if (Utils->ChallengeResponse && (Instance->FindModule("m_sha256.so")))
325 this->SetOurChallenge(RandString(20));
326 extra = " CHALLENGE=" + this->GetOurChallenge();
329 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);
331 this->WriteLine("CAPAB END");
334 /* Check a comma seperated list for an item */
335 bool TreeSocket::HasItem(const std::string &list, const std::string &item)
337 irc::commasepstream seplist(list);
338 std::string item2 = "*";
339 while ((item2 = seplist.GetToken()) != "")
347 /* Isolate and return the elements that are different between two comma seperated lists */
348 std::string TreeSocket::ListDifference(const std::string &one, const std::string &two)
350 irc::commasepstream list_one(one);
351 std::string item = "*";
352 std::string result = "";
353 while ((item = list_one.GetToken()) != "")
355 if (!HasItem(two, item))
364 bool TreeSocket::Capab(const std::deque<std::string> ¶ms)
366 if (params.size() < 1)
368 this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
371 if (params[0] == "START")
373 this->ModuleList = "";
374 this->CapKeys.clear();
376 else if (params[0] == "END")
378 std::string reason = "";
380 #ifdef SUPPORT_IP6LINKS
383 /* Compare ModuleList and check CapKeys...
384 * Maybe this could be tidier? -- Brain
386 if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
388 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
391 diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
395 diff = "this server:" + diff;
397 if (diff.length() == 12)
398 reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
400 reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
402 if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
403 reason = "We don't both support linking to IPV6 servers";
404 if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
405 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
406 if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
407 reason = "Maximum nickname lengths differ or remote nickname length not specified";
408 if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
410 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
412 reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
416 reason = "Protocol version not specified";
419 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))))
420 reason = "We don't both have halfop support enabled/disabled identically";
421 if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
422 reason = "Maximum ident lengths differ or remote ident length not specified";
423 if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
424 reason = "Maximum channel lengths differ or remote channel length not specified";
425 if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
426 reason = "Maximum modes per line differ or remote modes per line not specified";
427 if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
428 reason = "Maximum quit lengths differ or remote quit length not specified";
429 if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
430 reason = "Maximum topic lengths differ or remote topic length not specified";
431 if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
432 reason = "Maximum kick lengths differ or remote kick length not specified";
433 if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
434 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
435 if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
436 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
438 /* Challenge response, store their challenge for our password */
439 std::map<std::string,std::string>::iterator n = this->CapKeys.find("CHALLENGE");
440 if (Utils->ChallengeResponse && (n != this->CapKeys.end()) && (Instance->FindModule("m_sha256.so")))
442 /* Challenge-response is on now */
443 this->SetTheirChallenge(n->second);
444 if (!this->GetOurChallenge().empty() && (this->LinkState == CONNECTING))
446 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(OutboundPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
451 /* They didnt specify a challenge or we don't have m_sha256.so, we use plaintext */
452 if (this->LinkState == CONNECTING)
453 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+OutboundPass+" 0 :"+this->Instance->Config->ServerDesc);
458 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
462 else if ((params[0] == "MODULES") && (params.size() == 2))
464 if (!this->ModuleList.length())
466 this->ModuleList.append(params[1]);
470 this->ModuleList.append(",");
471 this->ModuleList.append(params[1]);
475 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
477 irc::tokenstream capabs(params[1]);
480 while ((more = capabs.GetToken(item)))
482 /* Process each key/value pair */
483 std::string::size_type equals = item.rfind('=');
484 if (equals != std::string::npos)
486 std::string var = item.substr(0, equals);
487 std::string value = item.substr(equals+1, item.length());
488 CapKeys[var] = value;
495 /** This function forces this server to quit, removing this server
496 * and any users on it (and servers and users below that, etc etc).
497 * It's very slow and pretty clunky, but luckily unless your network
498 * is having a REAL bad hair day, this function shouldnt be called
499 * too many times a month ;-)
501 void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
503 /* recursively squit the servers attached to 'Current'.
504 * We're going backwards so we don't remove users
505 * while we still need them ;)
507 for (unsigned int q = 0; q < Current->ChildCount(); q++)
509 TreeServer* recursive_server = Current->GetChild(q);
510 this->SquitServer(from,recursive_server);
512 /* Now we've whacked the kids, whack self */
514 num_lost_users += Current->QuitUsers(from);
517 /** This is a wrapper function for SquitServer above, which
518 * does some validation first and passes on the SQUIT to all
519 * other remaining servers.
521 void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
523 if ((Current) && (Current != Utils->TreeRoot))
525 Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
526 rmode.Send(Instance);
528 std::deque<std::string> params;
529 params.push_back(Current->GetName());
530 params.push_back(":"+reason);
531 Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
532 if (Current->GetParent() == Utils->TreeRoot)
534 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
538 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
540 num_lost_servers = 0;
542 std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
543 SquitServer(from, Current);
545 Current->GetParent()->DelChild(Current);
547 this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
551 Instance->Log(DEFAULT,"Squit from unknown server");
555 /** FMODE command - server mode with timestamp checks */
556 bool TreeSocket::ForceMode(const std::string &source, std::deque<std::string> ¶ms)
558 /* Chances are this is a 1.0 FMODE without TS */
559 if (params.size() < 3)
561 /* No modes were in the command, probably a channel with no modes set on it */
566 std::string sourceserv;
567 /* Are we dealing with an FMODE from a user, or from a server? */
568 userrec* who = this->Instance->FindNick(source);
571 /* FMODE from a user, set sourceserv to the users server name */
572 sourceserv = who->server;
576 /* FMODE from a server, create a fake user to receive mode feedback */
577 who = new userrec(this->Instance);
578 who->SetFd(FD_MAGIC_NUMBER);
579 smode = true; /* Setting this flag tells us we should free the userrec later */
580 sourceserv = source; /* Set sourceserv to the actual source string */
582 const char* modelist[64];
585 memset(&modelist,0,sizeof(modelist));
586 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
590 /* The timestamp is in this position.
591 * We don't want to pass that up to the
592 * server->client protocol!
594 TS = atoi(params[q].c_str());
598 /* Everything else is fine to append to the modelist */
599 modelist[n++] = params[q].c_str();
603 /* Extract the TS value of the object, either userrec or chanrec */
604 userrec* dst = this->Instance->FindNick(params[0]);
605 chanrec* chan = NULL;
613 chan = this->Instance->FindChan(params[0]);
619 /* Oops, channel doesnt exist! */
623 /* TS is equal or less: Merge the mode changes into ours and pass on.
629 this->Instance->SendMode(modelist, n, who);
633 this->Instance->CallCommandHandler("MODE", modelist, n, who);
635 /* HOT POTATO! PASS IT ON! */
636 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
638 /* If the TS is greater than ours, we drop the mode and dont pass it anywhere.
647 /** FTOPIC command */
648 bool TreeSocket::ForceTopic(const std::string &source, std::deque<std::string> ¶ms)
650 if (params.size() != 4)
652 time_t ts = atoi(params[1].c_str());
653 std::string nsource = source;
654 chanrec* c = this->Instance->FindChan(params[0]);
657 if ((ts >= c->topicset) || (!*c->topic))
659 std::string oldtopic = c->topic;
660 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
661 strlcpy(c->setby,params[2].c_str(),127);
663 /* if the topic text is the same as the current topic,
664 * dont bother to send the TOPIC command out, just silently
665 * update the set time and set nick.
667 if (oldtopic != params[3])
669 userrec* user = this->Instance->FindNick(source);
672 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
676 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
677 nsource = user->server;
679 /* all done, send it on its way */
680 params[3] = ":" + params[3];
681 Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
689 /** FJOIN, similar to TS6 SJOIN, but not quite. */
690 bool TreeSocket::ForceJoin(const std::string &source, std::deque<std::string> ¶ms)
692 /* 1.1 FJOIN works as follows:
694 * Each FJOIN is sent along with a timestamp, and the side with the lowest
695 * timestamp 'wins'. From this point on we will refer to this side as the
696 * winner. The side with the higher timestamp loses, from this point on we
697 * will call this side the loser or losing side. This should be familiar to
698 * anyone who's dealt with dreamforge or TS6 before.
700 * When two sides of a split heal and this occurs, the following things
703 * If the timestamps are exactly equal, both sides merge their privilages
704 * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
705 * re-created during a split, this is safe to do.
708 * If the timestamps are NOT equal, the losing side removes all privilage
709 * modes from all of its users that currently exist in the channel, before
710 * introducing new users into the channel which are listed in the FJOIN
711 * command's parameters. This means, all modes +ohv, and privilages added
712 * by modules, such as +qa. The losing side then LOWERS its timestamp value
713 * of the channel to match that of the winning side, and the modes of the
714 * users of the winning side are merged in with the losing side. The loser
715 * then sends out a set of FMODE commands which 'confirm' that it just
716 * removed all privilage modes from its existing users, which allows for
717 * services packages to still work correctly without needing to know the
718 * timestamping rules which InspIRCd follows. In TS6 servers this is always
719 * a problem, and services packages must contain code which explicitly
720 * behaves as TS6 does, removing ops from the losing side of a split where
721 * neccessary within its internal records, as this state information is
722 * not explicitly echoed out in that protocol.
724 * The winning side on the other hand will ignore all user modes from the
725 * losing side, so only its own modes get applied. Life is simple for those
726 * who succeed at internets. :-)
728 * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
729 * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
730 * you ask? Well, quite simply because we don't need to. They'll be sent
731 * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
732 * the losing side sends any modes for the channel which shouldnt win,
733 * they wont as their timestamp will be too high :-)
736 if (params.size() < 3)
739 char first[MAXBUF]; /* The first parameter of the mode command */
740 char modestring[MAXBUF]; /* The mode sequence (2nd parameter) of the mode command */
741 char* mode_users[127]; /* The values used by the mode command */
742 memset(&mode_users,0,sizeof(mode_users)); /* Initialize mode parameters */
743 mode_users[0] = first; /* Set this up to be our on-stack value */
744 mode_users[1] = modestring; /* Same here as above */
745 strcpy(modestring,"+"); /* Initialize the mode sequence to just '+' */
746 unsigned int modectr = 2; /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
748 userrec* who = NULL; /* User we are currently checking */
749 std::string channel = params[0]; /* Channel name, as a string */
750 time_t TS = atoi(params[1].c_str()); /* Timestamp given to us for remote side */
751 std::string nicklist = params[2];
752 bool created = false;
754 /* Try and find the channel */
755 chanrec* chan = this->Instance->FindChan(channel);
757 /* Initialize channel name in the mode parameters */
758 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
760 /* default TS is a high value, which if we dont have this
761 * channel will let the other side apply their modes.
763 time_t ourTS = Instance->Time(true)+600;
764 /* Does this channel exist? if it does, get its REAL timestamp */
768 created = true; /* don't perform deops, and set TS to correct time after processing. */
770 /* do this first, so our mode reversals are correctly received by other servers
771 * if there is a TS collision.
773 params[2] = ":" + params[2];
774 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
776 /* In 1.1, if they have the newer channel, we immediately clear
777 * all status modes from our users. We then accept their modes.
778 * If WE have the newer channel its the other side's job to do this.
779 * Note that this causes the losing server to send out confirming
784 std::deque<std::string> param_list;
785 /* Lower the TS here */
786 if (Utils->AnnounceTSChange && chan)
787 chan->WriteChannelWithServ(Instance->Config->ServerName,
788 "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
790 /* Zap all the privilage modes on our side, if the channel exists here */
793 param_list.push_back(channel);
796 this->RemoveStatus(Instance->Config->ServerName, param_list);
799 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
800 irc::tokenstream users(nicklist);
803 /* Now, process every 'prefixes,nick' pair */
804 while (users.GetToken(item))
807 const char* usr = item.c_str();
808 /* Safety check just to make sure someones not sent us an FJOIN full of spaces
809 * (is this even possible?) */
812 const char* permissions = usr;
814 char* nm = new char[MAXBUF];
816 /* Iterate through all the prefix values, convert them from prefixes
817 * to mode letters, and append them to the mode sequence
819 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
821 ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
824 /* This is a valid prefix */
826 *tnm++ = mh->GetModeChar();
830 /* Not a valid prefix...
831 * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
833 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
834 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
840 /* Null terminate modes */
842 /* Advance past the comma, to the nick */
844 /* Check the user actually exists */
845 who = this->Instance->FindNick(usr);
848 /* Check that the user's 'direction' is correct
849 * based on the server sending the FJOIN. We must
850 * check each nickname in turn, because the origin of
851 * the FJOIN may be different to the origin of the nicks
852 * in the command itself.
854 TreeServer* route_back_again = Utils->BestRouteTo(who->server);
855 if ((!route_back_again) || (route_back_again->GetSocket() != this))
857 /* Oh dear oh dear. */
862 /* NOTE: Moved this below the fake direction check, so that modes
863 * arent put into the mode list for users that were collided, and
864 * may reconnect from the other side or our side before the split
868 /* Did they get any modes? How many times? */
869 strlcat(modestring, nm, MAXBUF);
870 for (int k = 0; k < ntimes; k++)
871 mode_users[modectr++] = strdup(usr);
872 /* Free temporary buffer used for mode sequence */
875 /* Finally, we can actually place the user into the channel.
876 * We're sure its right. Final answer, phone a friend.
879 chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "", TS);
881 chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
882 /* Have we already queued up MAXMODES modes with parameters
883 * (+qaohv) ready to be sent to the server?
885 if (modectr >= (MAXMODES-1))
887 /* Only actually give the users any status if we lost
888 * the FJOIN or drew (equal timestamps).
889 * It isn't actually possible for ourTS to be > TS here,
890 * only possible to actually have ourTS == TS, or
891 * ourTS < TS, because if we lost, we already lowered
892 * our TS above before we entered this loop. We only
893 * check >= as a safety measure, in case someone stuffed
894 * up. If someone DID stuff up, it was most likely me.
895 * Note: I do not like baseball bats in the face...
899 this->Instance->SendMode((const char**)mode_users,modectr,who);
901 /* Something stuffed up, and for some reason, the timestamp is
902 * NOT lowered right now and should be. Lower it. Usually this
903 * code won't be executed, doubtless someone will remove it some
908 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
914 /* Reset all this back to defaults, and
915 * free any ram we have left allocated.
917 strcpy(mode_users[1],"+");
918 for (unsigned int f = 2; f < modectr; f++)
925 /* Remember to free this */
927 /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
928 * We don't try to process the nickname here (that WOULD cause a segfault because
929 * we'd be playing with null pointers) however, we DO pass the nickname on, just
930 * in case somehow we're desynched, so that other users which might be able to see
931 * the nickname get their fair chance to process it.
933 Instance->Log(SPARSE,"Warning! Invalid user %s in FJOIN to channel %s IGNORED", usr, channel.c_str());
939 /* there werent enough modes built up to flush it during FJOIN,
940 * or, there are a number left over. flush them out.
942 if ((modectr > 2) && (who) && (chan))
946 /* Our channel is newer than theirs. Evil deeds must be afoot. */
947 this->Instance->SendMode((const char**)mode_users,modectr,who);
948 /* Yet again, we can't actually get a true value here, if everything else
949 * is working as it should.
953 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
959 /* Free anything we have left to free */
960 for (unsigned int f = 2; f < modectr; f++)
963 /* All done. That wasnt so bad was it, you can wipe
964 * the sweat from your forehead now. :-)
970 bool TreeSocket::IntroduceClient(const std::string &source, std::deque<std::string> ¶ms)
972 /** Do we have enough parameters:
973 * NICK age nick host dhost ident +modes ip :gecos
975 if (params.size() != 8)
977 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
981 time_t age = atoi(params[0].c_str());
982 const char* tempnick = params[1].c_str();
984 /** Check parameters for validity before introducing the client, discovered by dmb.
985 * XXX: Can we make this neater?
989 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction (Invalid TS?)");
992 else if (params[1].length() > NICKMAX)
994 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+" > NICKMAX?)");
997 else if (params[2].length() > 64)
999 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[2]+" > 64?)");
1002 else if (params[3].length() > 64)
1004 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[3]+" > 64?)");
1007 else if (params[4].length() > IDENTMAX)
1009 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[4]+" > IDENTMAX?)");
1012 else if (params[7].length() > MAXGECOS)
1014 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[7]+" > MAXGECOS?)");
1018 /** Our client looks ok, lets introduce it now
1020 Instance->Log(DEBUG,"New remote client %s",tempnick);
1021 user_hash::iterator iter = this->Instance->clientlist->find(tempnick);
1023 if (iter != this->Instance->clientlist->end())
1025 /* nick collision */
1026 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1027 userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1031 userrec* _new = new userrec(this->Instance);
1032 (*(this->Instance->clientlist))[tempnick] = _new;
1033 _new->SetFd(FD_MAGIC_NUMBER);
1034 strlcpy(_new->nick, tempnick,NICKMAX-1);
1035 strlcpy(_new->host, params[2].c_str(),63);
1036 strlcpy(_new->dhost, params[3].c_str(),63);
1037 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1038 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1039 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1040 _new->registered = REG_ALL;
1043 /* we need to remove the + from the modestring, so we can do our stuff */
1044 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1045 if (pos_after_plus != std::string::npos)
1046 params[5] = params[5].substr(pos_after_plus);
1048 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1050 _new->modes[(*v)-65] = 1;
1051 /* For each mode thats set, increase counter */
1052 ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER);
1057 /* now we've done with modes processing, put the + back for remote servers */
1058 params[5] = "+" + params[5];
1060 #ifdef SUPPORT_IP6LINKS
1061 if (params[6].find_first_of(":") != std::string::npos)
1062 _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1065 _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1067 Instance->AddGlobalClone(_new);
1069 if (!this->Instance->SilentULine(_new->server))
1070 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1072 params[7] = ":" + params[7];
1073 Utils->DoOneToAllButSender(source,"NICK", params, source);
1075 // Increment the Source Servers User Count..
1076 TreeServer* SourceServer = Utils->FindServer(source);
1079 SourceServer->AddUserCount();
1082 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1087 /** Send one or more FJOINs for a channel of users.
1088 * If the length of a single line is more than 480-NICKMAX
1089 * in length, it is split over multiple lines.
1091 void TreeSocket::SendFJoins(TreeServer* Current, chanrec* c)
1095 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1097 size_t dlen, curlen;
1098 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1100 char* ptr = list + dlen;
1102 CUList *ulist = c->GetUsers();
1103 std::string modes = "";
1104 std::string params = "";
1106 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1108 // The first parameter gets a : before it
1109 size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1116 if (curlen > (480-NICKMAX))
1118 buffer.append(list).append("\r\n");
1119 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1127 buffer.append(list).append("\r\n");
1129 /* Sorry for the hax. Because newly created channels assume +nt,
1130 * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes.
1132 bool inverted = false;
1133 if (!c->IsModeSet('n'))
1138 if (!c->IsModeSet('t'))
1148 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");
1151 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1153 int size = strlen(b->data) + 2;
1154 int currsize = linesize + size;
1155 if (currsize <= 350)
1158 params.append(" ").append(b->data);
1161 if ((params.length() >= MAXMODES) || (currsize > 350))
1163 /* Wrap at MAXMODES */
1164 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");
1171 /* Only send these if there are any */
1173 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
1175 this->WriteLine(buffer);
1178 /** Send G, Q, Z and E lines */
1179 void TreeSocket::SendXLines(TreeServer* Current)
1183 std::string n = this->Instance->Config->ServerName;
1184 const char* sn = n.c_str();
1185 /* Yes, these arent too nice looking, but they get the job done */
1186 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++)
1188 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);
1189 buffer.append(data);
1191 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++)
1193 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);
1194 buffer.append(data);
1196 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++)
1198 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);
1199 buffer.append(data);
1201 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++)
1203 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);
1204 buffer.append(data);
1206 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++)
1208 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);
1209 buffer.append(data);
1211 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++)
1213 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);
1214 buffer.append(data);
1216 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++)
1218 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);
1219 buffer.append(data);
1221 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++)
1223 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);
1224 buffer.append(data);
1227 if (!buffer.empty())
1228 this->WriteLine(buffer);
1231 /** Send channel modes and topics */
1232 void TreeSocket::SendChannelModes(TreeServer* Current)
1235 std::deque<std::string> list;
1236 std::string n = this->Instance->Config->ServerName;
1237 const char* sn = n.c_str();
1238 for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
1240 SendFJoins(Current, c->second);
1241 if (*c->second->topic)
1243 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1244 this->WriteLine(data);
1246 FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
1248 c->second->GetExtList(list);
1249 for (unsigned int j = 0; j < list.size(); j++)
1251 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
1256 /** send all users and their oper state/modes */
1257 void TreeSocket::SendUsers(TreeServer* Current)
1260 std::deque<std::string> list;
1261 std::string dataline;
1262 for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
1264 if (u->second->registered == REG_ALL)
1266 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);
1267 this->WriteLine(data);
1268 if (*u->second->oper)
1270 snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
1271 this->WriteLine(data);
1273 if (*u->second->awaymsg)
1275 snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
1276 this->WriteLine(data);
1278 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
1280 u->second->GetExtList(list);
1282 for (unsigned int j = 0; j < list.size(); j++)
1284 FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
1290 /** This function is called when we want to send a netburst to a local
1291 * server. There is a set order we must do this, because for example
1292 * users require their servers to exist, and channels require their
1293 * users to exist. You get the idea.
1295 void TreeSocket::DoBurst(TreeServer* s)
1297 std::string name = s->GetName();
1298 std::string burst = "BURST "+ConvToStr(Instance->Time(true));
1299 std::string endburst = "ENDBURST";
1300 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s).", name.c_str(), this->GetTheirChallenge().empty() ? "plaintext password" : "SHA256-HMAC challenge-response");
1301 this->WriteLine(burst);
1302 /* send our version string */
1303 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1304 /* Send server tree */
1305 this->SendServers(Utils->TreeRoot,s,1);
1306 /* Send users and their oper status */
1308 /* Send everything else (channel modes, xlines etc) */
1309 this->SendChannelModes(s);
1310 this->SendXLines(s);
1311 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
1312 this->WriteLine(endburst);
1313 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1316 /** This function is called when we receive data from a remote
1317 * server. We buffer the data in a std::string (it doesnt stay
1318 * there for long), reading using InspSocket::Read() which can
1319 * read up to 16 kilobytes in one operation.
1321 * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1322 * THE SOCKET OBJECT FOR US.
1324 bool TreeSocket::OnDataReady()
1326 char* data = this->Read();
1327 /* Check that the data read is a valid pointer and it has some content */
1330 this->in_buffer.append(data);
1331 /* While there is at least one new line in the buffer,
1332 * do something useful (we hope!) with it.
1334 while (in_buffer.find("\n") != std::string::npos)
1336 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1337 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1338 /* Use rfind here not find, as theres more
1339 * chance of the \r being near the end of the
1340 * string, not the start.
1342 if (ret.find("\r") != std::string::npos)
1343 ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1344 /* Process this one, abort if it
1345 * didnt return true.
1347 if (!this->ProcessLine(ret))
1354 /* EAGAIN returns an empty but non-NULL string, so this
1355 * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1357 return (data && !*data);