src/modules/m_spanningtree/compat.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *
   6  * This file is part of InspIRCd.  InspIRCd is free software: you can
   7  * redistribute it and/or modify it under the terms of the GNU General Public
   8  * License as published by the Free Software Foundation, version 2.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  13  * details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include "inspircd.h"
  21 #include "main.h"
  22 #include "treesocket.h"
  23 #include "treeserver.h"
  24
  25 static std::string newline("\n");
  26
  27 void TreeSocket::WriteLine(std::string line)
  28 {
  29         if (LinkState == CONNECTED)
  30         {
  31                 if (line[0] != ':')
  32                 {
  33                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Sending line without server prefix!");
  34                         line = ":" + ServerInstance->Config->GetSID() + " " + line;
  35                 }
  36                 if (proto_version != ProtocolVersion)
  37                 {
  38                         std::string::size_type a = line.find(' ');
  39                         std::string::size_type b = line.find(' ', a + 1);
  40                         std::string command = line.substr(a + 1, b-a-1);
  41                         // now try to find a translation entry
  42                         // TODO a more efficient lookup method will be needed later
  43                         if (proto_version < 1205)
  44                         {
  45                                 if (command == "IJOIN")
  46                                 {
  47                                         // Convert
  48                                         // :<uid> IJOIN <chan> [<ts> [<flags>]]
  49                                         // to
  50                                         // :<sid> FJOIN <chan> <ts> + [<flags>],<uuid>
  51                                         std::string::size_type c = line.find(' ', b + 1);
  52                                         if (c == std::string::npos)
  53                                         {
  54                                                 // No TS or modes in the command
  55                                                 // :22DAAAAAB IJOIN #chan
  56                                                 const std::string channame = line.substr(b+1, c-b-1);
  57                                                 Channel* chan = ServerInstance->FindChan(channame);
  58                                                 if (!chan)
  59                                                         return;
  60
  61                                                 line.push_back(' ');
  62                                                 line.append(ConvToStr(chan->age));
  63                                                 line.append(" + ,");
  64                                         }
  65                                         else
  66                                         {
  67                                                 std::string::size_type d = line.find(' ', c + 1);
  68                                                 if (d == std::string::npos)
  69                                                 {
  70                                                         // TS present, no modes
  71                                                         // :22DAAAAAC IJOIN #chan 12345
  72                                                         line.append(" + ,");
  73                                                 }
  74                                                 else
  75                                                 {
  76                                                         // Both TS and modes are present
  77                                                         // :22DAAAAAC IJOIN #chan 12345 ov
  78                                                         std::string::size_type e = line.find(' ', d + 1);
  79                                                         if (e != std::string::npos)
  80                                                                 line.erase(e);
  81
  82                                                         line.insert(d, " +");
  83                                                         line.push_back(',');
  84                                                 }
  85                                         }
  86
  87                                         // Move the uuid to the end and replace the I with an F
  88                                         line.append(line.substr(1, 9));
  89                                         line.erase(4, 6);
  90                                         line[5] = 'F';
  91                                 }
  92                                 else if (command == "RESYNC")
  93                                         return;
  94                                 else if (command == "METADATA")
  95                                 {
  96                                         // Drop TS for channel METADATA, translate METADATA operquit into an OPERQUIT command
  97                                         // :sid METADATA #target TS extname ...
  98                                         //     A        B       C  D
  99                                         if (b == std::string::npos)
 100                                                 return;
 101
 102                                         std::string::size_type c = line.find(' ', b + 1);
 103                                         if (c == std::string::npos)
 104                                                 return;
 105
 106                                         std::string::size_type d = line.find(' ', c + 1);
 107                                         if (d == std::string::npos)
 108                                                 return;
 109
 110                                         if (line[b + 1] == '#')
 111                                         {
 112                                                 // We're sending channel metadata
 113                                                 line.erase(c, d-c);
 114                                         }
 115                                         else if (line.substr(c, d-c) == " operquit")
 116                                         {
 117                                                 // ":22D METADATA 22DAAAAAX operquit :message" -> ":22DAAAAAX OPERQUIT :message"
 118                                                 line = ":" + line.substr(b+1, c-b) + "OPERQUIT" + line.substr(d);
 119                                         }
 120                                 }
 121                                 else if (command == "FTOPIC")
 122                                 {
 123                                         // Drop channel TS for FTOPIC
 124                                         // :sid FTOPIC #target TS TopicTS ...
 125                                         //     A      B       C  D
 126                                         if (b == std::string::npos)
 127                                                 return;
 128
 129                                         std::string::size_type c = line.find(' ', b + 1);
 130                                         if (c == std::string::npos)
 131                                                 return;
 132
 133                                         std::string::size_type d = line.find(' ', c + 1);
 134                                         if (d == std::string::npos)
 135                                                 return;
 136
 137                                         line.erase(c, d-c);
 138                                 }
 139                                 else if ((command == "PING") || (command == "PONG"))
 140                                 {
 141                                         // :22D PING 20D
 142                                         if (line.length() < 13)
 143                                                 return;
 144
 145                                         // Insert the source SID (and a space) between the command and the first parameter
 146                                         line.insert(10, line.substr(1, 4));
 147                                 }
 148                                 else if (command == "OPERTYPE")
 149                                 {
 150                                         std::string::size_type colon = line.find(':', b);
 151                                         if (colon != std::string::npos)
 152                                         {
 153                                                 for (std::string::iterator i = line.begin()+colon; i != line.end(); ++i)
 154                                                 {
 155                                                         if (*i == ' ')
 156                                                                 *i = '_';
 157                                                 }
 158                                                 line.erase(colon, 1);
 159                                         }
 160                                 }
 161                         }
 162                 }
 163         }
 164
 165         ServerInstance->Logs->Log(MODNAME, LOG_RAWIO, "S[%d] O %s", this->GetFd(), line.c_str());
 166         this->WriteData(line);
 167         this->WriteData(newline);
 168 }
 169
 170 namespace
 171 {
 172         bool InsertCurrentChannelTS(std::vector<std::string>& params)
 173         {
 174                 Channel* chan = ServerInstance->FindChan(params[0]);
 175                 if (!chan)
 176                         return false;
 177
 178                 // Insert the current TS of the channel between the first and the second parameters
 179                 params.insert(params.begin()+1, ConvToStr(chan->age));
 180                 return true;
 181         }
 182 }
 183
 184 bool TreeSocket::PreProcessOldProtocolMessage(User*& who, std::string& cmd, std::vector<std::string>& params)
 185 {
 186         if ((cmd == "METADATA") && (params.size() >= 3) && (params[0][0] == '#'))
 187         {
 188                 // :20D METADATA #channel extname :extdata
 189                 return InsertCurrentChannelTS(params);
 190         }
 191         else if ((cmd == "FTOPIC") && (params.size() >= 4))
 192         {
 193                 // :20D FTOPIC #channel 100 Attila :topic text
 194                 return InsertCurrentChannelTS(params);
 195         }
 196         else if ((cmd == "PING") || (cmd == "PONG"))
 197         {
 198                 if (params.size() == 1)
 199                 {
 200                         // If it's a PING with 1 parameter, reply with a PONG now, if it's a PONG with 1 parameter (weird), do nothing
 201                         if (cmd[1] == 'I')
 202                                 this->WriteData(":" + ServerInstance->Config->GetSID() + " PONG " + params[0] + newline);
 203
 204                         // Don't process this message further
 205                         return false;
 206                 }
 207
 208                 // :20D PING 20D 22D
 209                 // :20D PONG 20D 22D
 210                 // Drop the first parameter
 211                 params.erase(params.begin());
 212
 213                 // If the target is a server name, translate it to a SID
 214                 if (!InspIRCd::IsSID(params[0]))
 215                 {
 216                         TreeServer* server = Utils->FindServer(params[0]);
 217                         if (!server)
 218                         {
 219                                 // We've no idea what this is, log and stop processing
 220                                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Received a " + cmd + " with an unknown target: \"" + params[0] + "\", command dropped");
 221                                 return false;
 222                         }
 223
 224                         params[0] = server->GetID();
 225                 }
 226         }
 227         else if ((cmd == "GLINE") || (cmd == "KLINE") || (cmd == "ELINE") || (cmd == "ZLINE") || (cmd == "QLINE"))
 228         {
 229                 // Fix undocumented protocol usage: translate GLINE, ZLINE, etc. into ADDLINE or DELLINE
 230                 if ((params.size() != 1) && (params.size() != 3))
 231                         return false;
 232
 233                 parameterlist p;
 234                 p.push_back(cmd.substr(0, 1));
 235                 p.push_back(params[0]);
 236
 237                 if (params.size() == 3)
 238                 {
 239                         cmd = "ADDLINE";
 240                         p.push_back(who->nick);
 241                         p.push_back(ConvToStr(ServerInstance->Time()));
 242                         p.push_back(ConvToStr(InspIRCd::Duration(params[1])));
 243                         p.push_back(params[2]);
 244                 }
 245                 else
 246                         cmd = "DELLINE";
 247
 248                 params.swap(p);
 249         }
 250         else if (cmd == "SVSMODE")
 251         {
 252                 cmd = "MODE";
 253         }
 254         else if (cmd == "OPERQUIT")
 255         {
 256                 // Translate OPERQUIT into METADATA
 257                 if (params.empty())
 258                         return false;
 259
 260                 cmd = "METADATA";
 261                 params.insert(params.begin(), who->uuid);
 262                 params.insert(params.begin()+1, "operquit");
 263                 who = MyRoot->ServerUser;
 264         }
 265
 266         return true; // Passthru
 267 }