1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
17 #include "treesocket.h"
18 #include "treeserver.h"
22 /* $ModDep: m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/treesocket.h */
25 std::string TreeSocket::MyCapabilities()
27 std::vector<std::string> modlist = this->ServerInstance->Modules->GetAllModuleNames(VF_COMMON);
28 std::string capabilities;
29 sort(modlist.begin(),modlist.end());
30 for (unsigned int i = 0; i < modlist.size(); i++)
33 capabilities = capabilities + ",";
34 capabilities = capabilities + modlist[i];
39 void TreeSocket::SendCapabilities()
45 irc::commasepstream modulelist(MyCapabilities());
46 this->WriteLine("CAPAB START");
48 /* Send module names, split at 509 length */
50 std::string line = "CAPAB MODULES ";
51 while (modulelist.GetToken(item))
53 if (line.length() + item.length() + 1 > 509)
55 this->WriteLine(line);
56 line = "CAPAB MODULES ";
59 if (line != "CAPAB MODULES ")
64 if (line != "CAPAB MODULES ")
65 this->WriteLine(line);
72 /* Do we have sha256 available? If so, we send a challenge */
73 if (Utils->ChallengeResponse && (ServerInstance->Modules->Find("m_sha256.so")))
75 this->SetOurChallenge(RandString(20));
76 extra = " CHALLENGE=" + this->GetOurChallenge();
79 this->WriteLine("CAPAB CAPABILITIES " /* Preprocessor does this one. */
80 ":NICKMAX="+ConvToStr(ServerInstance->Config->Limits.NickMax)+
81 " HALFOP="+ConvToStr(ServerInstance->Config->AllowHalfop)+
82 " CHANMAX="+ConvToStr(ServerInstance->Config->Limits.ChanMax)+
83 " MAXMODES="+ConvToStr(ServerInstance->Config->Limits.MaxModes)+
84 " IDENTMAX="+ConvToStr(ServerInstance->Config->Limits.IdentMax)+
85 " MAXQUIT="+ConvToStr(ServerInstance->Config->Limits.MaxQuit)+
86 " MAXTOPIC="+ConvToStr(ServerInstance->Config->Limits.MaxTopic)+
87 " MAXKICK="+ConvToStr(ServerInstance->Config->Limits.MaxKick)+
88 " MAXGECOS="+ConvToStr(ServerInstance->Config->Limits.MaxGecos)+
89 " MAXAWAY="+ConvToStr(ServerInstance->Config->Limits.MaxAway)+
90 " IP6NATIVE="+ConvToStr(ip6)+
92 " PROTOCOL="+ConvToStr(ProtocolVersion)+extra+
93 " PREFIX="+ServerInstance->Modes->BuildPrefixes()+
94 " CHANMODES="+ServerInstance->Modes->GiveModeList(MASK_CHANNEL)+
95 " USERMODES="+ServerInstance->Modes->GiveModeList(MASK_USER)+
98 this->WriteLine("CAPAB END");
101 /* Check a comma seperated list for an item */
102 bool TreeSocket::HasItem(const std::string &list, const std::string &item)
104 irc::commasepstream seplist(list);
107 while (seplist.GetToken(item2))
115 /* Isolate and return the elements that are different between two comma seperated lists */
116 std::string TreeSocket::ListDifference(const std::string &one, const std::string &two)
118 irc::commasepstream list_one(one);
121 while (list_one.GetToken(item))
123 if (!HasItem(two, item))
132 bool TreeSocket::Capab(const parameterlist ¶ms)
134 if (params.size() < 1)
136 this->SendError("Invalid number of parameters for CAPAB - Mismatched version");
139 if (params[0] == "START")
141 this->ModuleList.clear();
142 this->CapKeys.clear();
144 else if (params[0] == "END")
147 /* Compare ModuleList and check CapKeys */
148 if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
150 std::string diffIneed = ListDifference(this->ModuleList, this->MyCapabilities());
151 std::string diffUneed = ListDifference(this->MyCapabilities(), this->ModuleList);
152 if (diffIneed.length() == 0 && diffUneed.length() == 0)
154 reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
158 reason = "Modules incorrectly matched on these servers.";
159 if (diffIneed.length())
160 reason += " Not loaded here:" + diffIneed;
161 if (diffUneed.length())
162 reason += " Not loaded there:" + diffUneed;
164 this->SendError("CAPAB negotiation failed: "+reason);
167 if (this->CapKeys.find("PROTOCOL") == this->CapKeys.end())
169 reason = "Protocol version not specified";
173 int otherProto = atoi(CapKeys.find("PROTOCOL")->second.c_str());
174 if (otherProto < MinCompatProtocol)
176 reason = "Server is using protocol version " + ConvToStr(otherProto) +
177 " which is too old to link with this server (version " + ConvToStr(ProtocolVersion)
178 + (ProtocolVersion != MinCompatProtocol ? ", links with " + ConvToStr(MinCompatProtocol) + " and above)" : ")");
182 if(this->CapKeys.find("PREFIX") != this->CapKeys.end() && this->CapKeys.find("PREFIX")->second != this->ServerInstance->Modes->BuildPrefixes())
183 reason = "One or more of the prefixes on the remote server are invalid on this server.";
185 if(this->CapKeys.find("CHANMODES") != this->CapKeys.end() && this->CapKeys.find("CHANMODES")->second != this->ServerInstance->Modes->GiveModeList(MASK_CHANNEL))
186 reason = "One or more of the channel modes on the remote server are invalid on this server.";
188 if(this->CapKeys.find("USERMODES") != this->CapKeys.end() && this->CapKeys.find("USERMODES")->second != this->ServerInstance->Modes->GiveModeList(MASK_USER))
189 reason = "One or more of the user modes on the remote server are invalid on this server.";
192 /* Challenge response, store their challenge for our password */
193 std::map<std::string,std::string>::iterator n = this->CapKeys.find("CHALLENGE");
194 if (Utils->ChallengeResponse && (n != this->CapKeys.end()) && (ServerInstance->Modules->Find("m_sha256.so")))
196 /* Challenge-response is on now */
197 this->SetTheirChallenge(n->second);
198 if (!this->GetTheirChallenge().empty() && (this->LinkState == CONNECTING))
200 this->SendCapabilities();
201 this->WriteLine(std::string("SERVER ")+this->ServerInstance->Config->ServerName+" "+this->MakePass(OutboundPass, this->GetTheirChallenge())+" 0 "+
202 ServerInstance->Config->GetSID()+" :"+this->ServerInstance->Config->ServerDesc);
207 /* They didnt specify a challenge or we don't have m_sha256.so, we use plaintext */
208 if (this->LinkState == CONNECTING)
210 this->SendCapabilities();
211 this->WriteLine(std::string("SERVER ")+this->ServerInstance->Config->ServerName+" "+OutboundPass+" 0 "+ServerInstance->Config->GetSID()+" :"+this->ServerInstance->Config->ServerDesc);
217 this->SendError("CAPAB negotiation failed: "+reason);
221 else if ((params[0] == "MODULES") && (params.size() == 2))
223 if (!this->ModuleList.length())
225 this->ModuleList.append(params[1]);
229 this->ModuleList.append(",");
230 this->ModuleList.append(params[1]);
234 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
236 irc::tokenstream capabs(params[1]);
239 while ((more = capabs.GetToken(item)))
241 /* Process each key/value pair */
242 std::string::size_type equals = item.rfind('=');
243 if (equals != std::string::npos)
245 std::string var = item.substr(0, equals);
246 std::string value = item.substr(equals+1, item.length());
247 CapKeys[var] = value;