2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
6 * Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
8 * This file is part of InspIRCd. InspIRCd is free software: you can
9 * redistribute it and/or modify it under the terms of the GNU General Public
10 * License as published by the Free Software Foundation, version 2.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "treeserver.h"
29 std::string TreeSocket::MyModules(int filter)
31 const ModuleManager::ModuleMap& modlist = ServerInstance->Modules->GetModules();
33 std::string capabilities;
34 for (ModuleManager::ModuleMap::const_iterator i = modlist.begin(); i != modlist.end(); ++i)
36 Version v = i->second->GetVersion();
37 if (!(v.Flags & filter))
40 if (i != modlist.begin())
41 capabilities.push_back(' ');
42 capabilities.append(i->first);
43 if (!v.link_data.empty())
45 capabilities.push_back('=');
46 capabilities.append(v.link_data);
52 static std::string BuildModeList(ModeType type)
54 std::vector<std::string> modes;
55 for(char c='A'; c <= 'z'; c++)
57 ModeHandler* mh = ServerInstance->Modes->FindMode(c, type);
60 std::string mdesc = mh->name;
62 PrefixMode* pm = mh->IsPrefixMode();
66 mdesc.push_back(pm->GetPrefix());
68 mdesc.push_back(mh->GetModeChar());
69 modes.push_back(mdesc);
72 std::sort(modes.begin(), modes.end());
73 return irc::stringjoiner(modes);
76 void TreeSocket::SendCapabilities(int phase)
78 if (capab->capab_phase >= phase)
81 if (capab->capab_phase < 1 && phase >= 1)
82 WriteLine("CAPAB START " + ConvToStr(ProtocolVersion));
84 capab->capab_phase = phase;
89 irc::sepstream modulelist(MyModules(VF_COMMON), sep);
90 irc::sepstream optmodulelist(MyModules(VF_OPTCOMMON), sep);
91 /* Send module names, split at 509 length */
93 std::string line = "CAPAB MODULES :";
94 while (modulelist.GetToken(item))
96 if (line.length() + item.length() + 1 > 509)
98 this->WriteLine(line);
99 line = "CAPAB MODULES :";
102 if (line != "CAPAB MODULES :")
107 if (line != "CAPAB MODULES :")
108 this->WriteLine(line);
110 line = "CAPAB MODSUPPORT :";
111 while (optmodulelist.GetToken(item))
113 if (line.length() + item.length() + 1 > 509)
115 this->WriteLine(line);
116 line = "CAPAB MODSUPPORT :";
119 if (line != "CAPAB MODSUPPORT :")
124 if (line != "CAPAB MODSUPPORT :")
125 this->WriteLine(line);
127 WriteLine("CAPAB CHANMODES :" + BuildModeList(MODETYPE_CHANNEL));
128 WriteLine("CAPAB USERMODES :" + BuildModeList(MODETYPE_USER));
131 /* Do we have sha256 available? If so, we send a challenge */
132 if (ServerInstance->Modules->FindService(SERVICE_DATA, "hash/sha256"))
134 SetOurChallenge(ServerInstance->GenRandomStr(20));
135 extra = " CHALLENGE=" + this->GetOurChallenge();
138 // 2.0 needs this key
139 if (proto_version == 1202)
140 extra.append(" PROTOCOL="+ConvToStr(ProtocolVersion));
142 this->WriteLine("CAPAB CAPABILITIES " /* Preprocessor does this one. */
143 ":NICKMAX="+ConvToStr(ServerInstance->Config->Limits.NickMax)+
144 " CHANMAX="+ConvToStr(ServerInstance->Config->Limits.ChanMax)+
145 " MAXMODES="+ConvToStr(ServerInstance->Config->Limits.MaxModes)+
146 " IDENTMAX="+ConvToStr(ServerInstance->Config->Limits.IdentMax)+
147 " MAXQUIT="+ConvToStr(ServerInstance->Config->Limits.MaxQuit)+
148 " MAXTOPIC="+ConvToStr(ServerInstance->Config->Limits.MaxTopic)+
149 " MAXKICK="+ConvToStr(ServerInstance->Config->Limits.MaxKick)+
150 " MAXGECOS="+ConvToStr(ServerInstance->Config->Limits.MaxGecos)+
151 " MAXAWAY="+ConvToStr(ServerInstance->Config->Limits.MaxAway)+
152 " MAXHOST="+ConvToStr(ServerInstance->Config->Limits.MaxHost)+
154 " PREFIX="+ServerInstance->Modes->BuildPrefixes()+
155 " CHANMODES="+ServerInstance->Modes->GiveModeList(MODETYPE_CHANNEL)+
156 " USERMODES="+ServerInstance->Modes->GiveModeList(MODETYPE_USER)+
157 // XXX: Advertise the presence or absence of m_globops in CAPAB CAPABILITIES.
158 // Services want to know about it, and since m_globops was not marked as VF_(OPT)COMMON
159 // in 2.0, we advertise it here to not break linking to previous versions.
160 // Protocol version 1201 (1.2) does not have this issue because we advertise m_globops
161 // to 1201 protocol servers irrespectively of its module flags.
162 (ServerInstance->Modules->Find("m_globops.so") != NULL ? " GLOBOPS=1" : " GLOBOPS=0")
165 this->WriteLine("CAPAB END");
168 /* Isolate and return the elements that are different between two comma seperated lists */
169 void TreeSocket::ListDifference(const std::string &one, const std::string &two, char sep,
170 std::string& mleft, std::string& mright)
172 std::set<std::string> values;
173 irc::sepstream sepleft(one, sep);
174 irc::sepstream sepright(two, sep);
176 while (sepleft.GetToken(item))
180 while (sepright.GetToken(item))
182 if (!values.erase(item))
184 mright.push_back(sep);
188 for(std::set<std::string>::iterator i = values.begin(); i != values.end(); ++i)
190 mleft.push_back(sep);
195 bool TreeSocket::Capab(const parameterlist ¶ms)
197 if (params.size() < 1)
199 this->SendError("Invalid number of parameters for CAPAB - Mismatched version");
202 if (params[0] == "START")
204 capab->ModuleList.clear();
205 capab->OptModuleList.clear();
206 capab->CapKeys.clear();
207 if (params.size() > 1)
208 proto_version = ConvToInt(params[1]);
210 if (proto_version < MinCompatProtocol)
212 SendError("CAPAB negotiation failed: Server is using protocol version " + (proto_version ? ConvToStr(proto_version) : "1201 or older")
213 + " which is too old to link with this server (version " + ConvToStr(ProtocolVersion)
214 + (ProtocolVersion != MinCompatProtocol ? ", links with " + ConvToStr(MinCompatProtocol) + " and above)" : ")"));
218 // Special case, may be removed in the future
219 if (proto_version == 1203 || proto_version == 1204)
221 SendError("CAPAB negotiation failed: InspIRCd 2.1 beta is not supported");
227 else if (params[0] == "END")
230 /* Compare ModuleList and check CapKeys */
231 if ((this->capab->ModuleList != this->MyModules(VF_COMMON)) && (this->capab->ModuleList.length()))
233 std::string diffIneed, diffUneed;
234 ListDifference(this->capab->ModuleList, this->MyModules(VF_COMMON), ' ', diffIneed, diffUneed);
235 if (diffIneed.length() || diffUneed.length())
237 reason = "Modules incorrectly matched on these servers.";
238 if (diffIneed.length())
239 reason += " Not loaded here:" + diffIneed;
240 if (diffUneed.length())
241 reason += " Not loaded there:" + diffUneed;
242 this->SendError("CAPAB negotiation failed: "+reason);
246 if (this->capab->OptModuleList != this->MyModules(VF_OPTCOMMON) && this->capab->OptModuleList.length())
248 std::string diffIneed, diffUneed;
249 ListDifference(this->capab->OptModuleList, this->MyModules(VF_OPTCOMMON), ' ', diffIneed, diffUneed);
250 if (diffIneed.length() || diffUneed.length())
252 if (Utils->AllowOptCommon)
254 ServerInstance->SNO->WriteToSnoMask('l',
255 "Optional module lists do not match, some commands may not work globally.%s%s%s%s",
256 diffIneed.length() ? " Not loaded here:" : "", diffIneed.c_str(),
257 diffUneed.length() ? " Not loaded there:" : "", diffUneed.c_str());
261 reason = "Optional modules incorrectly matched on these servers, and options::allowmismatch not set.";
262 if (diffIneed.length())
263 reason += " Not loaded here:" + diffIneed;
264 if (diffUneed.length())
265 reason += " Not loaded there:" + diffUneed;
266 this->SendError("CAPAB negotiation failed: "+reason);
272 if(this->capab->CapKeys.find("PREFIX") != this->capab->CapKeys.end() && this->capab->CapKeys.find("PREFIX")->second != ServerInstance->Modes->BuildPrefixes())
273 reason = "One or more of the prefixes on the remote server are invalid on this server.";
275 if (!capab->ChanModes.empty())
277 if (capab->ChanModes != BuildModeList(MODETYPE_CHANNEL))
279 std::string diffIneed, diffUneed;
280 ListDifference(capab->ChanModes, BuildModeList(MODETYPE_CHANNEL), ' ', diffIneed, diffUneed);
281 if (diffIneed.length() || diffUneed.length())
283 reason = "Channel modes not matched on these servers.";
284 if (diffIneed.length())
285 reason += " Not loaded here:" + diffIneed;
286 if (diffUneed.length())
287 reason += " Not loaded there:" + diffUneed;
291 else if (this->capab->CapKeys.find("CHANMODES") != this->capab->CapKeys.end())
293 if (this->capab->CapKeys.find("CHANMODES")->second != ServerInstance->Modes->GiveModeList(MODETYPE_CHANNEL))
294 reason = "One or more of the channel modes on the remote server are invalid on this server.";
297 if (!capab->UserModes.empty())
299 if (capab->UserModes != BuildModeList(MODETYPE_USER))
301 std::string diffIneed, diffUneed;
302 ListDifference(capab->UserModes, BuildModeList(MODETYPE_USER), ' ', diffIneed, diffUneed);
303 if (diffIneed.length() || diffUneed.length())
305 reason = "User modes not matched on these servers.";
306 if (diffIneed.length())
307 reason += " Not loaded here:" + diffIneed;
308 if (diffUneed.length())
309 reason += " Not loaded there:" + diffUneed;
313 else if (this->capab->CapKeys.find("USERMODES") != this->capab->CapKeys.end())
315 if (this->capab->CapKeys.find("USERMODES")->second != ServerInstance->Modes->GiveModeList(MODETYPE_USER))
316 reason = "One or more of the user modes on the remote server are invalid on this server.";
319 /* Challenge response, store their challenge for our password */
320 std::map<std::string,std::string>::iterator n = this->capab->CapKeys.find("CHALLENGE");
321 if ((n != this->capab->CapKeys.end()) && (ServerInstance->Modules->FindService(SERVICE_DATA, "hash/sha256")))
323 /* Challenge-response is on now */
324 this->SetTheirChallenge(n->second);
325 if (!this->GetTheirChallenge().empty() && (this->LinkState == CONNECTING))
327 this->SendCapabilities(2);
328 this->WriteLine("SERVER "+ServerInstance->Config->ServerName+" "+this->MakePass(capab->link->SendPass, capab->theirchallenge)+" 0 "+ServerInstance->Config->GetSID()+" :"+ServerInstance->Config->ServerDesc);
333 // They didn't specify a challenge or we don't have sha256, we use plaintext
334 if (this->LinkState == CONNECTING)
336 this->SendCapabilities(2);
337 this->WriteLine("SERVER "+ServerInstance->Config->ServerName+" "+capab->link->SendPass+" 0 "+ServerInstance->Config->GetSID()+" :"+ServerInstance->Config->ServerDesc);
343 this->SendError("CAPAB negotiation failed: "+reason);
347 else if ((params[0] == "MODULES") && (params.size() == 2))
349 if (!capab->ModuleList.length())
351 capab->ModuleList = params[1];
355 capab->ModuleList.push_back(' ');
356 capab->ModuleList.append(params[1]);
359 else if ((params[0] == "MODSUPPORT") && (params.size() == 2))
361 if (!capab->OptModuleList.length())
363 capab->OptModuleList = params[1];
367 capab->OptModuleList.push_back(' ');
368 capab->OptModuleList.append(params[1]);
371 else if ((params[0] == "CHANMODES") && (params.size() == 2))
373 capab->ChanModes = params[1];
375 else if ((params[0] == "USERMODES") && (params.size() == 2))
377 capab->UserModes = params[1];
379 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
381 irc::tokenstream capabs(params[1]);
383 while (capabs.GetToken(item))
385 /* Process each key/value pair */
386 std::string::size_type equals = item.find('=');
387 if (equals != std::string::npos)
389 std::string var = item.substr(0, equals);
390 std::string value = item.substr(equals+1, item.length());
391 capab->CapKeys[var] = value;