2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2018 Matt Schatz <genius3000@g3k.solutions>
5 * Copyright (C) 2013-2016 Attila Molnar <attilamolnar@hush.com>
6 * Copyright (C) 2013, 2018-2019 Sadie Powell <sadie@witchery.services>
7 * Copyright (C) 2012 Robby <robby@chatbelgie.be>
8 * Copyright (C) 2010 Craig Edwards <brain@inspircd.org>
9 * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
11 * This file is part of InspIRCd. InspIRCd is free software: you can
12 * redistribute it and/or modify it under the terms of the GNU General Public
13 * License as published by the Free Software Foundation, version 2.
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "treesocket.h"
28 #include "treeserver.h"
30 static std::string newline("\n");
32 void TreeSocket::WriteLineNoCompat(const std::string& line)
34 ServerInstance->Logs->Log(MODNAME, LOG_RAWIO, "S[%d] O %s", this->GetFd(), line.c_str());
35 this->WriteData(line);
36 this->WriteData(newline);
39 void TreeSocket::WriteLine(const std::string& original_line)
41 if (LinkState == CONNECTED)
43 if (proto_version != PROTO_NEWEST)
45 std::string line = original_line;
46 std::string::size_type a = line.find(' ');
49 // The line contains tags which the 1202 protocol can't handle.
53 std::string::size_type b = line.find(' ', a + 1);
54 std::string command(line, a + 1, b-a-1);
55 // now try to find a translation entry
56 if (proto_version < PROTO_INSPIRCD_30)
58 if (command == "IJOIN")
61 // :<uid> IJOIN <chan> <membid> [<ts> [<flags>]]
63 // :<sid> FJOIN <chan> <ts> + [<flags>],<uuid>
64 std::string::size_type c = line.find(' ', b + 1);
65 if (c == std::string::npos)
68 std::string::size_type d = line.find(' ', c + 1);
69 // Erase membership id first
71 if (d == std::string::npos)
73 // No TS or modes in the command
74 // :22DAAAAAB IJOIN #chan
75 const std::string channame(line, b+1, c-b-1);
76 Channel* chan = ServerInstance->FindChan(channame);
81 line.append(ConvToStr(chan->age));
86 d = line.find(' ', c + 1);
87 if (d == std::string::npos)
89 // TS present, no modes
90 // :22DAAAAAC IJOIN #chan 12345
95 // Both TS and modes are present
96 // :22DAAAAAC IJOIN #chan 12345 ov
97 std::string::size_type e = line.find(' ', d + 1);
98 if (e != std::string::npos)
101 line.insert(d, " +");
106 // Move the uuid to the end and replace the I with an F
107 line.append(line.substr(1, 9));
111 else if (command == "RESYNC")
113 else if (command == "METADATA")
115 // Drop TS for channel METADATA, translate METADATA operquit into an OPERQUIT command
116 // :sid METADATA #target TS extname ...
118 if (b == std::string::npos)
121 std::string::size_type c = line.find(' ', b + 1);
122 if (c == std::string::npos)
125 std::string::size_type d = line.find(' ', c + 1);
126 if (d == std::string::npos)
129 if (line[b + 1] == '#')
131 // We're sending channel metadata
134 else if (!line.compare(c, d-c, " operquit", 9))
136 // ":22D METADATA 22DAAAAAX operquit :message" -> ":22DAAAAAX OPERQUIT :message"
137 line = ":" + line.substr(b+1, c-b) + "OPERQUIT" + line.substr(d);
140 else if (command == "FTOPIC")
142 // Drop channel TS for FTOPIC
143 // :sid FTOPIC #target TS TopicTS setter :newtopic
145 // :uid FTOPIC #target TS TopicTS :newtopic
147 if (b == std::string::npos)
150 std::string::size_type c = line.find(' ', b + 1);
151 if (c == std::string::npos)
154 std::string::size_type d = line.find(' ', c + 1);
155 if (d == std::string::npos)
158 std::string::size_type e = line.find(' ', d + 1);
159 if (line[e+1] == ':')
167 else if ((command == "PING") || (command == "PONG"))
170 if (line.length() < 13)
173 // Insert the source SID (and a space) between the command and the first parameter
174 line.insert(10, line.substr(1, 4));
176 else if (command == "OPERTYPE")
178 std::string::size_type colon = line.find(':', b);
179 if (colon != std::string::npos)
181 for (std::string::iterator i = line.begin()+colon; i != line.end(); ++i)
186 line.erase(colon, 1);
189 else if (command == "INVITE")
191 // :22D INVITE 22DAAAAAN #chan TS ExpirationTime
193 if (b == std::string::npos)
196 std::string::size_type c = line.find(' ', b + 1);
197 if (c == std::string::npos)
200 std::string::size_type d = line.find(' ', c + 1);
201 if (d == std::string::npos)
204 std::string::size_type e = line.find(' ', d + 1);
205 // If there is no expiration time then everything will be erased from 'd'
208 else if (command == "FJOIN")
210 // Strip membership ids
211 // :22D FJOIN #chan 1234 +f 4:3 :o,22DAAAAAB:15 o,22DAAAAAA:15
212 // :22D FJOIN #chan 1234 +f 4:3 o,22DAAAAAB:15
213 // :22D FJOIN #chan 1234 +Pf 4:3 :
215 // If the last parameter is prefixed by a colon then it's a userlist which may have 0 or more users;
216 // if it isn't, then it is a single member
217 std::string::size_type spcolon = line.find(" :");
218 if (spcolon != std::string::npos)
221 // Loop while there is a ':' in the userlist, this is never true if the channel is empty
222 std::string::size_type pos = std::string::npos;
223 while ((pos = line.rfind(':', pos-1)) > spcolon)
225 // Find the next space after the ':'
226 std::string::size_type sp = line.find(' ', pos);
227 // Erase characters between the ':' and the next space after it, including the ':' but not the space;
228 // if there is no next space, everything will be erased between pos and the end of the line
229 line.erase(pos, sp-pos);
234 // Last parameter is a single member
235 std::string::size_type sp = line.rfind(' ');
236 std::string::size_type colon = line.find(':', sp);
240 else if (command == "KICK")
242 // Strip membership id if the KICK has one
243 if (b == std::string::npos)
246 std::string::size_type c = line.find(' ', b + 1);
247 if (c == std::string::npos)
250 std::string::size_type d = line.find(' ', c + 1);
251 if ((d < line.size()-1) && (original_line[d+1] != ':'))
253 // There is a third parameter which doesn't begin with a colon, erase it
254 std::string::size_type e = line.find(' ', d + 1);
258 else if (command == "SINFO")
260 // :22D SINFO version :InspIRCd-3.0
262 std::string::size_type c = line.find(' ', b + 1);
263 if (c == std::string::npos)
266 // Only translating SINFO version, discard everything else
267 if (line.compare(b, 9, " version ", 9))
270 line = line.substr(0, 5) + "VERSION" + line.substr(c);
272 else if (command == "SERVER")
274 // :001 SERVER inspircd.test 002 [<anything> ...] :description
276 std::string::size_type c = line.find(' ', b + 1);
277 if (c == std::string::npos)
280 std::string::size_type d = c + 4;
281 std::string::size_type spcolon = line.find(" :", d);
282 if (spcolon == std::string::npos)
285 line.erase(d, spcolon-d);
286 line.insert(c, " * 0");
290 WriteLineNoCompat(line);
292 // Synthesize a :<newserver> BURST <time> message
293 spcolon = line.find(" :");
295 TreeServer* const source = Utils->FindServerID(line.substr(spcolon-3, 3));
299 line = CmdBuilder(source, "BURST").push_int(ServerInstance->Time()).str();
302 else if (command == "NUM")
304 // :<sid> NUM <numeric source sid> <target uuid> <3 digit number> <params>
306 // :<sid> PUSH <target uuid> :<numeric source name> <3 digit number> <target nick> <params>
308 TreeServer* const numericsource = Utils->FindServerID(line.substr(9, 3));
312 // The nick of the target is necessary for building the PUSH message
313 User* const target = ServerInstance->FindUUID(line.substr(13, UIDGenerator::UUID_LENGTH));
317 std::string push = InspIRCd::Format(":%.*s PUSH %s ::%s %.*s %s", 3, line.c_str()+1, target->uuid.c_str(), numericsource->GetName().c_str(), 3, line.c_str()+23, target->nick.c_str());
318 push.append(line, 26, std::string::npos);
321 else if (command == "TAGMSG")
323 // Drop IRCv3 tag messages as v2 has no message tag support.
327 WriteLineNoCompat(line);
332 WriteLineNoCompat(original_line);
337 bool InsertCurrentChannelTS(CommandBase::Params& params, unsigned int chanindex = 0, unsigned int pos = 1)
339 Channel* chan = ServerInstance->FindChan(params[chanindex]);
343 // Insert the current TS of the channel after the pos-th parameter
344 params.insert(params.begin()+pos, ConvToStr(chan->age));
349 bool TreeSocket::PreProcessOldProtocolMessage(User*& who, std::string& cmd, CommandBase::Params& params)
351 if ((cmd == "METADATA") && (params.size() >= 3) && (params[0][0] == '#'))
353 // :20D METADATA #channel extname :extdata
354 return InsertCurrentChannelTS(params);
356 else if ((cmd == "FTOPIC") && (params.size() >= 4))
358 // :20D FTOPIC #channel 100 Attila :topic text
359 return InsertCurrentChannelTS(params);
361 else if ((cmd == "PING") || (cmd == "PONG"))
363 if (params.size() == 1)
365 // If it's a PING with 1 parameter, reply with a PONG now, if it's a PONG with 1 parameter (weird), do nothing
367 this->WriteData(":" + ServerInstance->Config->GetSID() + " PONG " + params[0] + newline);
369 // Don't process this message further
375 // Drop the first parameter
376 params.erase(params.begin());
378 // If the target is a server name, translate it to a SID
379 if (!InspIRCd::IsSID(params[0]))
381 TreeServer* server = Utils->FindServer(params[0]);
384 // We've no idea what this is, log and stop processing
385 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Received a " + cmd + " with an unknown target: \"" + params[0] + "\", command dropped");
389 params[0] = server->GetId();
392 else if ((cmd == "GLINE") || (cmd == "KLINE") || (cmd == "ELINE") || (cmd == "ZLINE") || (cmd == "QLINE"))
394 // Fix undocumented protocol usage: translate GLINE, ZLINE, etc. into ADDLINE or DELLINE
395 if ((params.size() != 1) && (params.size() != 3))
398 CommandBase::Params p;
399 p.push_back(cmd.substr(0, 1));
400 p.push_back(params[0]);
402 if (params.size() == 3)
405 p.push_back(who->nick);
406 p.push_back(ConvToStr(ServerInstance->Time()));
407 p.push_back(ConvToStr(InspIRCd::Duration(params[1])));
408 p.push_back(params[2]);
415 else if (cmd == "SVSMODE")
419 else if (cmd == "OPERQUIT")
421 // Translate OPERQUIT into METADATA
426 params.insert(params.begin(), who->uuid);
427 params.insert(params.begin()+1, "operquit");
428 who = MyRoot->ServerUser;
430 else if ((cmd == "TOPIC") && (params.size() >= 2))
432 // :20DAAAAAC TOPIC #chan :new topic
434 if (!InsertCurrentChannelTS(params))
437 params.insert(params.begin()+2, ConvToStr(ServerInstance->Time()));
439 else if (cmd == "MODENOTICE")
441 // MODENOTICE is always supported by 2.0 but it's optional in 3.0.
442 params.insert(params.begin(), "*");
443 params.insert(params.begin()+1, cmd);
446 else if (cmd == "RULES")
450 else if (cmd == "INVITE")
452 // :20D INVITE 22DAAABBB #chan
453 // :20D INVITE 22DAAABBB #chan 123456789
454 // Insert channel timestamp after the channel name; the 3rd parameter, if there, is the invite expiration time
455 return InsertCurrentChannelTS(params, 1, 2);
457 else if (cmd == "VERSION")
459 // :20D VERSION :InspIRCd-2.0
461 // :20D SINFO version :InspIRCd-2.0
463 params.insert(params.begin(), "version");
465 else if (cmd == "JOIN")
467 // 2.0 allows and forwards legacy JOINs but we don't, so translate them to FJOINs before processing
468 if ((params.size() != 1) || (IS_SERVER(who)))
469 return false; // Huh?
472 Channel* chan = ServerInstance->FindChan(params[0]);
473 params.push_back(ConvToStr(chan ? chan->age : ServerInstance->Time()));
474 params.push_back("+");
475 params.push_back(",");
476 params.back().append(who->uuid);
477 who = TreeServer::Get(who)->ServerUser;
479 else if ((cmd == "FMODE") && (params.size() >= 2))
481 // Translate user mode changes with timestamp to MODE
482 if (params[0][0] != '#')
484 User* user = ServerInstance->FindUUID(params[0]);
488 // Emulate the old nonsensical behavior
489 if (user->age < ServerCommand::ExtractTS(params[1]))
493 params.erase(params.begin()+1);
496 else if ((cmd == "SERVER") && (params.size() > 4))
498 // This does not affect the initial SERVER line as it is sent before the link state is CONNECTED
499 // :20D SERVER <name> * 0 <sid> <desc>
501 // :20D SERVER <name> <sid> <desc>
503 params[1].swap(params[3]);
504 params.erase(params.begin()+2, params.begin()+4);
506 // If the source of this SERVER message or any of its parents are bursting, then new servers it
507 // introduces are not bursting.
508 bool bursting = false;
509 for (TreeServer* server = TreeServer::Get(who); server; server = server->GetParent())
511 if (server->IsBursting())
519 params.insert(params.begin()+2, "burst=" + ConvToStr(((uint64_t)ServerInstance->Time())*1000));
521 else if (cmd == "BURST")
523 // A server is introducing another one, drop unnecessary BURST
526 else if (cmd == "SVSWATCH")
528 // SVSWATCH was removed because nothing was using it, but better be sure
531 else if (cmd == "SVSSILENCE")
533 // SVSSILENCE was removed because nothing was using it, but better be sure
536 else if (cmd == "PUSH")
538 if ((params.size() != 2) || (!this->MyRoot))
539 return false; // Huh?
541 irc::tokenstream ts(params.back());
544 ts.GetMiddle(srcstr);
550 // See if it's a numeric being sent to the target via PUSH
551 unsigned int numeric_number = 0;
552 if (token.length() == 3)
553 numeric_number = ConvToNum<unsigned int>(token);
555 if ((numeric_number > 0) && (numeric_number < 1000))
557 // It's a numeric, translate to NUM
559 // srcstr must be a valid server name
560 TreeServer* const numericsource = Utils->FindServer(srcstr);
563 ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Unable to translate PUSH numeric %s to user %s from 1202 protocol server %s: source \"%s\" doesn't exist", token.c_str(), params[0].c_str(), this->MyRoot->GetName().c_str(), srcstr.c_str());
569 // Second parameter becomes the target uuid
570 params[0].swap(params[1]);
571 // Replace first param (now the PUSH payload, not needed) with the source sid
572 params[0] = numericsource->GetId();
574 params.push_back(InspIRCd::Format("%03u", numeric_number));
576 // Ignore the nickname in the numeric in PUSH
579 // Rest of the tokens are the numeric parameters, add them to NUM
580 while (ts.GetTrailing(token))
581 params.push_back(token);
583 else if ((token == "PRIVMSG") || (token == "NOTICE"))
585 // Command is a PRIVMSG/NOTICE
588 // Check if the PRIVMSG/NOTICE target is a nickname
590 if (token.c_str()[0] == '#')
592 ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Unable to translate PUSH %s to user %s from 1202 protocol server %s, target \"%s\"", cmd.c_str(), params[0].c_str(), this->MyRoot->GetName().c_str(), token.c_str());
596 // Replace second parameter with the message
597 ts.GetTrailing(params[1]);
601 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Unable to translate PUSH to user %s from 1202 protocol server %s", params[0].c_str(), this->MyRoot->GetName().c_str());
608 return true; // Passthru