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Fix Windows build and a few more problems
[user/henk/code/inspircd.git] / src / modules / m_spanningtree / server.cpp
1 /*
2  * InspIRCd -- Internet Relay Chat Daemon
3  *
4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
5  *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
6  *
7  * This file is part of InspIRCd.  InspIRCd is free software: you can
8  * redistribute it and/or modify it under the terms of the GNU General Public
9  * License as published by the Free Software Foundation, version 2.
10  *
11  * This program is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
14  * details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20
21 #include "inspircd.h"
22
23 #include "main.h"
24 #include "utils.h"
25 #include "link.h"
26 #include "treeserver.h"
27 #include "treesocket.h"
28 #include "commands.h"
29
30 /*
31  * Some server somewhere in the network introducing another server.
32  *      -- w
33  */
34 CmdResult CommandServer::HandleServer(TreeServer* ParentOfThis, std::vector<std::string>& params)
35 {
36         std::string servername = params[0];
37         // password is not used for a remote server
38         // hopcount is not used (ever)
39         std::string sid = params[3];
40         std::string description = params[4];
41         TreeSocket* socket = ParentOfThis->GetSocket();
42
43         if (!InspIRCd::IsSID(sid))
44         {
45                 socket->SendError("Invalid format server ID: "+sid+"!");
46                 return CMD_FAILURE;
47         }
48         TreeServer* CheckDupe = Utils->FindServer(servername);
49         if (CheckDupe)
50         {
51                 socket->SendError("Server "+servername+" already exists!");
52                 ServerInstance->SNO->WriteToSnoMask('L', "Server \2"+CheckDupe->GetName()+"\2 being introduced from \2" + ParentOfThis->GetName() + "\2 denied, already exists. Closing link with " + ParentOfThis->GetName());
53                 return CMD_FAILURE;
54         }
55         CheckDupe = Utils->FindServer(sid);
56         if (CheckDupe)
57         {
58                 socket->SendError("Server ID "+sid+" already exists! You may want to specify the server ID for the server manually with <server:id> so they do not conflict.");
59                 ServerInstance->SNO->WriteToSnoMask('L', "Server \2"+servername+"\2 being introduced from \2" + ParentOfThis->GetName() + "\2 denied, server ID already exists on the network. Closing link with " + ParentOfThis->GetName());
60                 return CMD_FAILURE;
61         }
62
63
64         Link* lnk = Utils->FindLink(servername);
65
66         TreeServer* Node = new TreeServer(servername, description, sid, ParentOfThis, ParentOfThis->GetSocket(), lnk ? lnk->Hidden : false);
67
68         ParentOfThis->AddChild(Node);
69         ServerInstance->SNO->WriteToSnoMask('L', "Server \002"+ParentOfThis->GetName()+"\002 introduced server \002"+servername+"\002 ("+description+")");
70         return CMD_SUCCESS;
71 }
72
73
74 /*
75  * This is used after the other side of a connection has accepted our credentials.
76  * They are then introducing themselves to us, BEFORE either of us burst. -- w
77  */
78 bool TreeSocket::Outbound_Reply_Server(parameterlist &params)
79 {
80         if (params.size() < 5)
81         {
82                 SendError("Protocol error - Not enough parameters for SERVER command");
83                 return false;
84         }
85
86         irc::string servername = params[0].c_str();
87         std::string sname = params[0];
88         std::string password = params[1];
89         std::string sid = params[3];
90         std::string description = params[4];
91
92         this->SendCapabilities(2);
93
94         if (!ServerInstance->IsSID(sid))
95         {
96                 this->SendError("Invalid format server ID: "+sid+"!");
97                 return false;
98         }
99
100         for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); i++)
101         {
102                 Link* x = *i;
103                 if (x->Name != servername && x->Name != "*") // open link allowance
104                         continue;
105
106                 if (!ComparePass(*x, password))
107                 {
108                         ServerInstance->SNO->WriteToSnoMask('l',"Invalid password on link: %s", x->Name.c_str());
109                         continue;
110                 }
111
112                 TreeServer* CheckDupe = Utils->FindServer(sname);
113                 if (CheckDupe)
114                 {
115                         std::string pname = CheckDupe->GetParent() ? CheckDupe->GetParent()->GetName() : "<ourself>";
116                         SendError("Server "+sname+" already exists on server "+pname+"!");
117                         ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+pname);
118                         return false;
119                 }
120                 CheckDupe = Utils->FindServer(sid);
121                 if (CheckDupe)
122                 {
123                         this->SendError("Server ID "+sid+" already exists on the network! You may want to specify the server ID for the server manually with <server:id> so they do not conflict.");
124                         ServerInstance->SNO->WriteToSnoMask('l',"Server \2"+assign(servername)+"\2 being introduced denied, server ID already exists on the network. Closing link.");
125                         return false;
126                 }
127
128                 /*
129                  * They're in WAIT_AUTH_2 (having accepted our credentials).
130                  * Set our state to CONNECTED (since everything's peachy so far) and send our
131                  * netburst to them, which will trigger their CONNECTED state, and BURST in reply.
132                  *
133                  * While we're at it, create a treeserver object so we know about them.
134                  *   -- w
135                  */
136                 this->LinkState = CONNECTED;
137
138                 Utils->timeoutlist.erase(this);
139                 linkID = sname;
140
141                 MyRoot = new TreeServer(sname, description, sid, Utils->TreeRoot, this, x->Hidden);
142                 Utils->TreeRoot->AddChild(MyRoot);
143                 this->DoBurst(MyRoot);
144
145                 params[4] = ":" + params[4];
146
147                 /* IMPORTANT: Take password/hmac hash OUT of here before we broadcast the introduction! */
148                 params[1] = "*";
149                 Utils->DoOneToAllButSender(ServerInstance->Config->GetSID(),"SERVER",params,MyRoot);
150
151                 return true;
152         }
153
154         this->SendError("Invalid credentials (check the other server's linking snomask for more information)");
155         ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
156         return false;
157 }
158
159 bool TreeSocket::CheckDuplicate(const std::string& sname, const std::string& sid)
160 {
161         /* Check for fully initialized instances of the server by name */
162         TreeServer* CheckDupe = Utils->FindServer(sname);
163         if (CheckDupe)
164         {
165                 std::string pname = CheckDupe->GetParent() ? CheckDupe->GetParent()->GetName() : "<ourself>";
166                 SendError("Server "+sname+" already exists on server "+pname+"!");
167                 ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+pname);
168                 return false;
169         }
170
171         /* Check for fully initialized instances of the server by id */
172         ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Looking for dupe SID %s", sid.c_str());
173         CheckDupe = Utils->FindServerID(sid);
174
175         if (CheckDupe)
176         {
177                 this->SendError("Server ID "+CheckDupe->GetID()+" already exists on server "+CheckDupe->GetName()+"! You may want to specify the server ID for the server manually with <server:id> so they do not conflict.");
178                 ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server ID '"+CheckDupe->GetID()+
179                                 "' already exists on server "+CheckDupe->GetName());
180                 return false;
181         }
182
183         return true;
184 }
185
186 /*
187  * Someone else is attempting to connect to us if this is called. Validate their credentials etc.
188  *              -- w
189  */
190 bool TreeSocket::Inbound_Server(parameterlist &params)
191 {
192         if (params.size() < 5)
193         {
194                 SendError("Protocol error - Missing SID");
195                 return false;
196         }
197
198         irc::string servername = params[0].c_str();
199         std::string sname = params[0];
200         std::string password = params[1];
201         std::string sid = params[3];
202         std::string description = params[4];
203
204         this->SendCapabilities(2);
205
206         if (!ServerInstance->IsSID(sid))
207         {
208                 this->SendError("Invalid format server ID: "+sid+"!");
209                 return false;
210         }
211
212         for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); i++)
213         {
214                 Link* x = *i;
215                 if (x->Name != servername && x->Name != "*") // open link allowance
216                         continue;
217
218                 if (!ComparePass(*x, password))
219                 {
220                         ServerInstance->SNO->WriteToSnoMask('l',"Invalid password on link: %s", x->Name.c_str());
221                         continue;
222                 }
223
224                 if (!CheckDuplicate(sname, sid))
225                         return false;
226
227                 ServerInstance->SNO->WriteToSnoMask('l',"Verified incoming server connection " + linkID + " ("+description+")");
228
229                 this->SendCapabilities(2);
230
231                 // Save these for later, so when they accept our credentials (indicated by BURST) we remember them
232                 this->capab->hidden = x->Hidden;
233                 this->capab->sid = sid;
234                 this->capab->description = description;
235                 this->capab->name = sname;
236
237                 // Send our details: Our server name and description and hopcount of 0,
238                 // along with the sendpass from this block.
239                 this->WriteLine("SERVER "+ServerInstance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 "+ServerInstance->Config->GetSID()+" :"+ServerInstance->Config->ServerDesc);
240
241                 // move to the next state, we are now waiting for THEM.
242                 this->LinkState = WAIT_AUTH_2;
243                 return true;
244         }
245
246         this->SendError("Invalid credentials");
247         ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
248         return false;
249 }
250