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;
63 mdesc.push_back(mh->GetPrefix());
64 if (mh->GetModeChar())
65 mdesc.push_back(mh->GetModeChar());
66 modes.push_back(mdesc);
69 sort(modes.begin(), modes.end());
70 irc::stringjoiner line(modes);
71 return line.GetJoined();
74 void TreeSocket::SendCapabilities(int phase)
76 if (capab->capab_phase >= phase)
79 if (capab->capab_phase < 1 && phase >= 1)
80 WriteLine("CAPAB START " + ConvToStr(ProtocolVersion));
82 capab->capab_phase = phase;
87 irc::sepstream modulelist(MyModules(VF_COMMON), sep);
88 irc::sepstream optmodulelist(MyModules(VF_OPTCOMMON), sep);
89 /* Send module names, split at 509 length */
91 std::string line = "CAPAB MODULES :";
92 while (modulelist.GetToken(item))
94 if (line.length() + item.length() + 1 > 509)
96 this->WriteLine(line);
97 line = "CAPAB MODULES :";
100 if (line != "CAPAB MODULES :")
105 if (line != "CAPAB MODULES :")
106 this->WriteLine(line);
108 line = "CAPAB MODSUPPORT :";
109 while (optmodulelist.GetToken(item))
111 if (line.length() + item.length() + 1 > 509)
113 this->WriteLine(line);
114 line = "CAPAB MODSUPPORT :";
117 if (line != "CAPAB MODSUPPORT :")
122 if (line != "CAPAB MODSUPPORT :")
123 this->WriteLine(line);
125 WriteLine("CAPAB CHANMODES :" + BuildModeList(MODETYPE_CHANNEL));
126 WriteLine("CAPAB USERMODES :" + BuildModeList(MODETYPE_USER));
129 /* Do we have sha256 available? If so, we send a challenge */
130 if (Utils->ChallengeResponse && (ServerInstance->Modules->Find("m_sha256.so")))
132 SetOurChallenge(ServerInstance->GenRandomStr(20));
133 extra = " CHALLENGE=" + this->GetOurChallenge();
136 // 2.0 needs this key
137 if (proto_version == 1202)
138 extra.append(" PROTOCOL="+ConvToStr(ProtocolVersion));
140 this->WriteLine("CAPAB CAPABILITIES " /* Preprocessor does this one. */
141 ":NICKMAX="+ConvToStr(ServerInstance->Config->Limits.NickMax)+
142 " CHANMAX="+ConvToStr(ServerInstance->Config->Limits.ChanMax)+
143 " MAXMODES="+ConvToStr(ServerInstance->Config->Limits.MaxModes)+
144 " IDENTMAX="+ConvToStr(ServerInstance->Config->Limits.IdentMax)+
145 " MAXQUIT="+ConvToStr(ServerInstance->Config->Limits.MaxQuit)+
146 " MAXTOPIC="+ConvToStr(ServerInstance->Config->Limits.MaxTopic)+
147 " MAXKICK="+ConvToStr(ServerInstance->Config->Limits.MaxKick)+
148 " MAXGECOS="+ConvToStr(ServerInstance->Config->Limits.MaxGecos)+
149 " MAXAWAY="+ConvToStr(ServerInstance->Config->Limits.MaxAway)+
151 " PREFIX="+ServerInstance->Modes->BuildPrefixes()+
152 " CHANMODES="+ServerInstance->Modes->GiveModeList(MASK_CHANNEL)+
153 " USERMODES="+ServerInstance->Modes->GiveModeList(MASK_USER)
156 this->WriteLine("CAPAB END");
159 /* Isolate and return the elements that are different between two comma seperated lists */
160 void TreeSocket::ListDifference(const std::string &one, const std::string &two, char sep,
161 std::string& mleft, std::string& mright)
163 std::set<std::string> values;
164 irc::sepstream sepleft(one, sep);
165 irc::sepstream sepright(two, sep);
167 while (sepleft.GetToken(item))
171 while (sepright.GetToken(item))
173 if (!values.erase(item))
175 mright.push_back(sep);
179 for(std::set<std::string>::iterator i = values.begin(); i != values.end(); ++i)
181 mleft.push_back(sep);
186 bool TreeSocket::Capab(const parameterlist ¶ms)
188 if (params.size() < 1)
190 this->SendError("Invalid number of parameters for CAPAB - Mismatched version");
193 if (params[0] == "START")
195 capab->ModuleList.clear();
196 capab->OptModuleList.clear();
197 capab->CapKeys.clear();
198 if (params.size() > 1)
199 proto_version = ConvToInt(params[1]);
201 if (proto_version < MinCompatProtocol)
203 SendError("CAPAB negotiation failed: Server is using protocol version " + (proto_version ? ConvToStr(proto_version) : "1201 or older")
204 + " which is too old to link with this server (version " + ConvToStr(ProtocolVersion)
205 + (ProtocolVersion != MinCompatProtocol ? ", links with " + ConvToStr(MinCompatProtocol) + " and above)" : ")"));
209 // Special case, may be removed in the future
210 if (proto_version == 1203 || proto_version == 1204)
212 SendError("CAPAB negotiation failed: InspIRCd 2.1 beta is not supported");
218 else if (params[0] == "END")
221 /* Compare ModuleList and check CapKeys */
222 if ((this->capab->ModuleList != this->MyModules(VF_COMMON)) && (this->capab->ModuleList.length()))
224 std::string diffIneed, diffUneed;
225 ListDifference(this->capab->ModuleList, this->MyModules(VF_COMMON), ' ', diffIneed, diffUneed);
226 if (diffIneed.length() || diffUneed.length())
228 reason = "Modules incorrectly matched on these servers.";
229 if (diffIneed.length())
230 reason += " Not loaded here:" + diffIneed;
231 if (diffUneed.length())
232 reason += " Not loaded there:" + diffUneed;
233 this->SendError("CAPAB negotiation failed: "+reason);
237 if (this->capab->OptModuleList != this->MyModules(VF_OPTCOMMON) && this->capab->OptModuleList.length())
239 std::string diffIneed, diffUneed;
240 ListDifference(this->capab->OptModuleList, this->MyModules(VF_OPTCOMMON), ' ', diffIneed, diffUneed);
241 if (diffIneed.length() || diffUneed.length())
243 if (Utils->AllowOptCommon)
245 ServerInstance->SNO->WriteToSnoMask('l',
246 "Optional module lists do not match, some commands may not work globally.%s%s%s%s",
247 diffIneed.length() ? " Not loaded here:" : "", diffIneed.c_str(),
248 diffUneed.length() ? " Not loaded there:" : "", diffUneed.c_str());
252 reason = "Optional modules incorrectly matched on these servers, and options::allowmismatch not set.";
253 if (diffIneed.length())
254 reason += " Not loaded here:" + diffIneed;
255 if (diffUneed.length())
256 reason += " Not loaded there:" + diffUneed;
257 this->SendError("CAPAB negotiation failed: "+reason);
263 if(this->capab->CapKeys.find("PREFIX") != this->capab->CapKeys.end() && this->capab->CapKeys.find("PREFIX")->second != ServerInstance->Modes->BuildPrefixes())
264 reason = "One or more of the prefixes on the remote server are invalid on this server.";
266 if (!capab->ChanModes.empty())
268 if (capab->ChanModes != BuildModeList(MODETYPE_CHANNEL))
270 std::string diffIneed, diffUneed;
271 ListDifference(capab->ChanModes, BuildModeList(MODETYPE_CHANNEL), ' ', diffIneed, diffUneed);
272 if (diffIneed.length() || diffUneed.length())
274 reason = "Channel modes not matched on these servers.";
275 if (diffIneed.length())
276 reason += " Not loaded here:" + diffIneed;
277 if (diffUneed.length())
278 reason += " Not loaded there:" + diffUneed;
282 else if (this->capab->CapKeys.find("CHANMODES") != this->capab->CapKeys.end())
284 if (this->capab->CapKeys.find("CHANMODES")->second != ServerInstance->Modes->GiveModeList(MASK_CHANNEL))
285 reason = "One or more of the channel modes on the remote server are invalid on this server.";
288 if (!capab->UserModes.empty())
290 if (capab->UserModes != BuildModeList(MODETYPE_USER))
292 std::string diffIneed, diffUneed;
293 ListDifference(capab->UserModes, BuildModeList(MODETYPE_USER), ' ', diffIneed, diffUneed);
294 if (diffIneed.length() || diffUneed.length())
296 reason = "User modes not matched on these servers.";
297 if (diffIneed.length())
298 reason += " Not loaded here:" + diffIneed;
299 if (diffUneed.length())
300 reason += " Not loaded there:" + diffUneed;
304 else if (this->capab->CapKeys.find("USERMODES") != this->capab->CapKeys.end())
306 if (this->capab->CapKeys.find("USERMODES")->second != ServerInstance->Modes->GiveModeList(MASK_USER))
307 reason = "One or more of the user modes on the remote server are invalid on this server.";
310 /* Challenge response, store their challenge for our password */
311 std::map<std::string,std::string>::iterator n = this->capab->CapKeys.find("CHALLENGE");
312 if (Utils->ChallengeResponse && (n != this->capab->CapKeys.end()) && (ServerInstance->Modules->Find("m_sha256.so")))
314 /* Challenge-response is on now */
315 this->SetTheirChallenge(n->second);
316 if (!this->GetTheirChallenge().empty() && (this->LinkState == CONNECTING))
318 this->SendCapabilities(2);
319 this->WriteLine("SERVER "+ServerInstance->Config->ServerName+" "+this->MakePass(capab->link->SendPass, capab->theirchallenge)+" 0 "+ServerInstance->Config->GetSID()+" :"+ServerInstance->Config->ServerDesc);
324 /* They didnt specify a challenge or we don't have m_sha256.so, we use plaintext */
325 if (this->LinkState == CONNECTING)
327 this->SendCapabilities(2);
328 this->WriteLine("SERVER "+ServerInstance->Config->ServerName+" "+capab->link->SendPass+" 0 "+ServerInstance->Config->GetSID()+" :"+ServerInstance->Config->ServerDesc);
334 this->SendError("CAPAB negotiation failed: "+reason);
338 else if ((params[0] == "MODULES") && (params.size() == 2))
340 if (!capab->ModuleList.length())
342 capab->ModuleList = params[1];
346 capab->ModuleList.push_back(' ');
347 capab->ModuleList.append(params[1]);
350 else if ((params[0] == "MODSUPPORT") && (params.size() == 2))
352 if (!capab->OptModuleList.length())
354 capab->OptModuleList = params[1];
358 capab->OptModuleList.push_back(' ');
359 capab->OptModuleList.append(params[1]);
362 else if ((params[0] == "CHANMODES") && (params.size() == 2))
364 capab->ChanModes = params[1];
366 else if ((params[0] == "USERMODES") && (params.size() == 2))
368 capab->UserModes = params[1];
370 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
372 irc::tokenstream capabs(params[1]);
374 while (capabs.GetToken(item))
376 /* Process each key/value pair */
377 std::string::size_type equals = item.find('=');
378 if (equals != std::string::npos)
380 std::string var = item.substr(0, equals);
381 std::string value = item.substr(equals+1, item.length());
382 capab->CapKeys[var] = value;