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("m_spanningtree", 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
  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                                         if (line[b + 1] == '#')
 107                                         {
 108                                                 // We're sending channel metadata
 109                                                 std::string::size_type d = line.find(' ', c + 1);
 110                                                 if (d == std::string::npos)
 111                                                         return;
 112
 113                                                 line.erase(c, d-c);
 114                                         }
 115                                 }
 116                                 else if (command == "FTOPIC")
 117                                 {
 118                                         // Drop channel TS for FTOPIC
 119                                         // :sid FTOPIC #target TS TopicTS ...
 120                                         //     A      B       C  D
 121                                         if (b == std::string::npos)
 122                                                 return;
 123
 124                                         std::string::size_type c = line.find(' ', b + 1);
 125                                         if (c == std::string::npos)
 126                                                 return;
 127
 128                                         std::string::size_type d = line.find(' ', c + 1);
 129                                         if (d == std::string::npos)
 130                                                 return;
 131
 132                                         line.erase(c, d-c);
 133                                 }
 134                                 else if ((command == "PING") || (command == "PONG"))
 135                                 {
 136                                         // :22D PING 20D
 137                                         if (line.length() < 13)
 138                                                 return;
 139
 140                                         // Insert the source SID (and a space) between the command and the first parameter
 141                                         line.insert(10, line.substr(1, 4));
 142                                 }
 143                         }
 144                 }
 145         }
 146
 147         ServerInstance->Logs->Log("m_spanningtree", LOG_RAWIO, "S[%d] O %s", this->GetFd(), line.c_str());
 148         this->WriteData(line);
 149         this->WriteData(newline);
 150 }
 151
 152 namespace
 153 {
 154         bool InsertCurrentChannelTS(std::vector<std::string>& params)
 155         {
 156                 Channel* chan = ServerInstance->FindChan(params[0]);
 157                 if (!chan)
 158                         return false;
 159
 160                 // Insert the current TS of the channel between the first and the second parameters
 161                 params.insert(params.begin()+1, ConvToStr(chan->age));
 162                 return true;
 163         }
 164 }
 165
 166 bool TreeSocket::PreProcessOldProtocolMessage(User*& who, std::string& cmd, std::vector<std::string>& params)
 167 {
 168         if ((cmd == "METADATA") && (params.size() >= 3))
 169         {
 170                 // :20D METADATA #channel extname :extdata
 171                 return InsertCurrentChannelTS(params);
 172         }
 173         else if ((cmd == "FTOPIC") && (params.size() >= 4))
 174         {
 175                 // :20D FTOPIC #channel 100 Attila :topic text
 176                 return InsertCurrentChannelTS(params);
 177         }
 178         else if ((cmd == "PING") || (cmd == "PONG"))
 179         {
 180                 if (params.size() == 1)
 181                 {
 182                         // If it's a PING with 1 parameter, reply with a PONG now, if it's a PONG with 1 parameter (weird), do nothing
 183                         if (cmd[1] == 'I')
 184                                 this->WriteData(":" + ServerInstance->Config->GetSID() + " PONG " + params[0] + newline);
 185
 186                         // Don't process this message further
 187                         return false;
 188                 }
 189
 190                 // :20D PING 20D 22D
 191                 // :20D PONG 20D 22D
 192                 // Drop the first parameter
 193                 params.erase(params.begin());
 194
 195                 // If the target is a server name, translate it to a SID
 196                 if (!InspIRCd::IsSID(params[0]))
 197                 {
 198                         TreeServer* server = Utils->FindServer(params[0]);
 199                         if (!server)
 200                         {
 201                                 // We've no idea what this is, log and stop processing
 202                                 ServerInstance->Logs->Log("m_spanningtree", LOG_DEFAULT, "Received a " + cmd + " with an unknown target: \"" + params[0] + "\", command dropped");
 203                                 return false;
 204                         }
 205
 206                         params[0] = server->GetID();
 207                 }
 208         }
 209
 210         return true; // Passthru
 211 }