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(const std::string& original_line)
  28 {
  29         if (LinkState == CONNECTED)
  30         {
  31                 if (original_line.c_str()[0] != ':')
  32                 {
  33                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Sending line without server prefix!");
  34                         WriteLine(":" + ServerInstance->Config->GetSID() + " " + original_line);
  35                         return;
  36                 }
  37                 if (proto_version != ProtocolVersion)
  38                 {
  39                         std::string line = original_line;
  40                         std::string::size_type a = line.find(' ');
  41                         std::string::size_type b = line.find(' ', a + 1);
  42                         std::string command = line.substr(a + 1, b-a-1);
  43                         // now try to find a translation entry
  44                         // TODO a more efficient lookup method will be needed later
  45                         if (proto_version < 1205)
  46                         {
  47                                 if (command == "IJOIN")
  48                                 {
  49                                         // Convert
  50                                         // :<uid> IJOIN <chan> [<ts> [<flags>]]
  51                                         // to
  52                                         // :<sid> FJOIN <chan> <ts> + [<flags>],<uuid>
  53                                         std::string::size_type c = line.find(' ', b + 1);
  54                                         if (c == std::string::npos)
  55                                         {
  56                                                 // No TS or modes in the command
  57                                                 // :22DAAAAAB IJOIN #chan
  58                                                 const std::string channame = line.substr(b+1, c-b-1);
  59                                                 Channel* chan = ServerInstance->FindChan(channame);
  60                                                 if (!chan)
  61                                                         return;
  62
  63                                                 line.push_back(' ');
  64                                                 line.append(ConvToStr(chan->age));
  65                                                 line.append(" + ,");
  66                                         }
  67                                         else
  68                                         {
  69                                                 std::string::size_type d = line.find(' ', c + 1);
  70                                                 if (d == std::string::npos)
  71                                                 {
  72                                                         // TS present, no modes
  73                                                         // :22DAAAAAC IJOIN #chan 12345
  74                                                         line.append(" + ,");
  75                                                 }
  76                                                 else
  77                                                 {
  78                                                         // Both TS and modes are present
  79                                                         // :22DAAAAAC IJOIN #chan 12345 ov
  80                                                         std::string::size_type e = line.find(' ', d + 1);
  81                                                         if (e != std::string::npos)
  82                                                                 line.erase(e);
  83
  84                                                         line.insert(d, " +");
  85                                                         line.push_back(',');
  86                                                 }
  87                                         }
  88
  89                                         // Move the uuid to the end and replace the I with an F
  90                                         line.append(line.substr(1, 9));
  91                                         line.erase(4, 6);
  92                                         line[5] = 'F';
  93                                 }
  94                                 else if (command == "RESYNC")
  95                                         return;
  96                                 else if (command == "METADATA")
  97                                 {
  98                                         // Drop TS for channel METADATA, translate METADATA operquit into an OPERQUIT command
  99                                         // :sid METADATA #target TS extname ...
 100                                         //     A        B       C  D
 101                                         if (b == std::string::npos)
 102                                                 return;
 103
 104                                         std::string::size_type c = line.find(' ', b + 1);
 105                                         if (c == std::string::npos)
 106                                                 return;
 107
 108                                         std::string::size_type d = line.find(' ', c + 1);
 109                                         if (d == std::string::npos)
 110                                                 return;
 111
 112                                         if (line[b + 1] == '#')
 113                                         {
 114                                                 // We're sending channel metadata
 115                                                 line.erase(c, d-c);
 116                                         }
 117                                         else if (!line.compare(c, d-c, " operquit", 9))
 118                                         {
 119                                                 // ":22D METADATA 22DAAAAAX operquit :message" -> ":22DAAAAAX OPERQUIT :message"
 120                                                 line = ":" + line.substr(b+1, c-b) + "OPERQUIT" + line.substr(d);
 121                                         }
 122                                 }
 123                                 else if (command == "FTOPIC")
 124                                 {
 125                                         // Drop channel TS for FTOPIC
 126                                         // :sid FTOPIC #target TS TopicTS setter :newtopic
 127                                         //     A      B       C  D       E      F
 128                                         // :uid FTOPIC #target TS TopicTS :newtopic
 129                                         //     A      B       C  D       E
 130                                         if (b == std::string::npos)
 131                                                 return;
 132
 133                                         std::string::size_type c = line.find(' ', b + 1);
 134                                         if (c == std::string::npos)
 135                                                 return;
 136
 137                                         std::string::size_type d = line.find(' ', c + 1);
 138                                         if (d == std::string::npos)
 139                                                 return;
 140
 141                                         std::string::size_type e = line.find(' ', d + 1);
 142                                         if (line[e+1] == ':')
 143                                         {
 144                                                 line.erase(c, e-c);
 145                                                 line.erase(a+1, 1);
 146                                         }
 147                                         else
 148                                                 line.erase(c, d-c);
 149                                 }
 150                                 else if ((command == "PING") || (command == "PONG"))
 151                                 {
 152                                         // :22D PING 20D
 153                                         if (line.length() < 13)
 154                                                 return;
 155
 156                                         // Insert the source SID (and a space) between the command and the first parameter
 157                                         line.insert(10, line.substr(1, 4));
 158                                 }
 159                                 else if (command == "OPERTYPE")
 160                                 {
 161                                         std::string::size_type colon = line.find(':', b);
 162                                         if (colon != std::string::npos)
 163                                         {
 164                                                 for (std::string::iterator i = line.begin()+colon; i != line.end(); ++i)
 165                                                 {
 166                                                         if (*i == ' ')
 167                                                                 *i = '_';
 168                                                 }
 169                                                 line.erase(colon, 1);
 170                                         }
 171                                 }
 172                                 else if (command == "INVITE")
 173                                 {
 174                                         // :22D INVITE 22DAAAAAN #chan TS ExpirationTime
 175                                         //     A      B         C     D  E
 176                                         if (b == std::string::npos)
 177                                                 return;
 178
 179                                         std::string::size_type c = line.find(' ', b + 1);
 180                                         if (c == std::string::npos)
 181                                                 return;
 182
 183                                         std::string::size_type d = line.find(' ', c + 1);
 184                                         if (d == std::string::npos)
 185                                                 return;
 186
 187                                         std::string::size_type e = line.find(' ', d + 1);
 188                                         // If there is no expiration time then everything will be erased from 'd'
 189                                         line.erase(d, e-d);
 190                                 }
 191                         }
 192                         ServerInstance->Logs->Log(MODNAME, LOG_RAWIO, "S[%d] O %s", this->GetFd(), line.c_str());
 193                         this->WriteData(line);
 194                         this->WriteData(newline);
 195                         return;
 196                 }
 197         }
 198
 199         ServerInstance->Logs->Log(MODNAME, LOG_RAWIO, "S[%d] O %s", this->GetFd(), original_line.c_str());
 200         this->WriteData(original_line);
 201         this->WriteData(newline);
 202 }
 203
 204 namespace
 205 {
 206         bool InsertCurrentChannelTS(std::vector<std::string>& params, unsigned int chanindex = 0, unsigned int pos = 1)
 207         {
 208                 Channel* chan = ServerInstance->FindChan(params[chanindex]);
 209                 if (!chan)
 210                         return false;
 211
 212                 // Insert the current TS of the channel after the pos-th parameter
 213                 params.insert(params.begin()+pos, ConvToStr(chan->age));
 214                 return true;
 215         }
 216 }
 217
 218 bool TreeSocket::PreProcessOldProtocolMessage(User*& who, std::string& cmd, std::vector<std::string>& params)
 219 {
 220         if ((cmd == "METADATA") && (params.size() >= 3) && (params[0][0] == '#'))
 221         {
 222                 // :20D METADATA #channel extname :extdata
 223                 return InsertCurrentChannelTS(params);
 224         }
 225         else if ((cmd == "FTOPIC") && (params.size() >= 4))
 226         {
 227                 // :20D FTOPIC #channel 100 Attila :topic text
 228                 return InsertCurrentChannelTS(params);
 229         }
 230         else if ((cmd == "PING") || (cmd == "PONG"))
 231         {
 232                 if (params.size() == 1)
 233                 {
 234                         // If it's a PING with 1 parameter, reply with a PONG now, if it's a PONG with 1 parameter (weird), do nothing
 235                         if (cmd[1] == 'I')
 236                                 this->WriteData(":" + ServerInstance->Config->GetSID() + " PONG " + params[0] + newline);
 237
 238                         // Don't process this message further
 239                         return false;
 240                 }
 241
 242                 // :20D PING 20D 22D
 243                 // :20D PONG 20D 22D
 244                 // Drop the first parameter
 245                 params.erase(params.begin());
 246
 247                 // If the target is a server name, translate it to a SID
 248                 if (!InspIRCd::IsSID(params[0]))
 249                 {
 250                         TreeServer* server = Utils->FindServer(params[0]);
 251                         if (!server)
 252                         {
 253                                 // We've no idea what this is, log and stop processing
 254                                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Received a " + cmd + " with an unknown target: \"" + params[0] + "\", command dropped");
 255                                 return false;
 256                         }
 257
 258                         params[0] = server->GetID();
 259                 }
 260         }
 261         else if ((cmd == "GLINE") || (cmd == "KLINE") || (cmd == "ELINE") || (cmd == "ZLINE") || (cmd == "QLINE"))
 262         {
 263                 // Fix undocumented protocol usage: translate GLINE, ZLINE, etc. into ADDLINE or DELLINE
 264                 if ((params.size() != 1) && (params.size() != 3))
 265                         return false;
 266
 267                 parameterlist p;
 268                 p.push_back(cmd.substr(0, 1));
 269                 p.push_back(params[0]);
 270
 271                 if (params.size() == 3)
 272                 {
 273                         cmd = "ADDLINE";
 274                         p.push_back(who->nick);
 275                         p.push_back(ConvToStr(ServerInstance->Time()));
 276                         p.push_back(ConvToStr(InspIRCd::Duration(params[1])));
 277                         p.push_back(params[2]);
 278                 }
 279                 else
 280                         cmd = "DELLINE";
 281
 282                 params.swap(p);
 283         }
 284         else if (cmd == "SVSMODE")
 285         {
 286                 cmd = "MODE";
 287         }
 288         else if (cmd == "OPERQUIT")
 289         {
 290                 // Translate OPERQUIT into METADATA
 291                 if (params.empty())
 292                         return false;
 293
 294                 cmd = "METADATA";
 295                 params.insert(params.begin(), who->uuid);
 296                 params.insert(params.begin()+1, "operquit");
 297                 who = MyRoot->ServerUser;
 298         }
 299         else if ((cmd == "TOPIC") && (params.size() >= 2))
 300         {
 301                 // :20DAAAAAC TOPIC #chan :new topic
 302                 cmd = "FTOPIC";
 303                 if (!InsertCurrentChannelTS(params))
 304                         return false;
 305
 306                 params.insert(params.begin()+2, ConvToStr(ServerInstance->Time()));
 307         }
 308         else if (cmd == "MODENOTICE")
 309         {
 310                 // MODENOTICE is always supported by 2.0 but it's optional in 2.2.
 311                 params.insert(params.begin(), "*");
 312                 params.insert(params.begin()+1, cmd);
 313                 cmd = "ENCAP";
 314         }
 315         else if (cmd == "RULES")
 316         {
 317                 return false;
 318         }
 319         else if (cmd == "INVITE")
 320         {
 321                 // :20D INVITE 22DAAABBB #chan
 322                 // :20D INVITE 22DAAABBB #chan 123456789
 323                 // Insert channel timestamp after the channel name; the 3rd parameter, if there, is the invite expiration time
 324                 return InsertCurrentChannelTS(params, 1, 2);
 325         }
 326
 327         return true; // Passthru
 328 }