src/coremods/core_message.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2007-2008 Craig Edwards <craigedwards@brainbox.cc>
   6  *   Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
   7  *
   8  * This file is part of InspIRCd.  InspIRCd is free software: you can
   9  * redistribute it and/or modify it under the terms of the GNU General Public
  10  * License as published by the Free Software Foundation, version 2.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  14  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  15  * details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21
  22 #include "inspircd.h"
  23
  24 class MessageDetailsImpl : public MessageDetails
  25 {
  26 public:
  27         MessageDetailsImpl(MessageType mt, const std::string& msg, const ClientProtocol::TagMap& tags)
  28                 : MessageDetails(mt, msg, tags)
  29         {
  30         }
  31
  32         bool IsCTCP(std::string& name, std::string& body) const CXX11_OVERRIDE
  33         {
  34                 if (!this->IsCTCP())
  35                         return false;
  36
  37                 size_t end_of_name = text.find(' ', 2);
  38                 size_t end_of_ctcp = *text.rbegin() == '\x1' ? 1 : 0;
  39                 if (end_of_name == std::string::npos)
  40                 {
  41                         // The CTCP only contains a name.
  42                         name.assign(text, 1, text.length() - 1 - end_of_ctcp);
  43                         body.clear();
  44                         return true;
  45                 }
  46
  47                 // The CTCP contains a name and a body.
  48                 name.assign(text, 1, end_of_name - 1);
  49
  50                 size_t start_of_body = text.find_first_not_of(' ', end_of_name + 1);
  51                 if (start_of_body == std::string::npos)
  52                 {
  53                         // The CTCP body is provided but empty.
  54                         body.clear();
  55                         return true;
  56                 }
  57
  58                 // The CTCP body provided was non-empty.
  59                 body.assign(text, start_of_body, text.length() - start_of_body - end_of_ctcp);
  60                 return true;
  61         }
  62
  63         bool IsCTCP(std::string& name) const CXX11_OVERRIDE
  64         {
  65                 if (!this->IsCTCP())
  66                         return false;
  67
  68                 size_t end_of_name = text.find(' ', 2);
  69                 if (end_of_name == std::string::npos)
  70                 {
  71                         // The CTCP only contains a name.
  72                         size_t end_of_ctcp = *text.rbegin() == '\x1' ? 1 : 0;
  73                         name.assign(text, 1, text.length() - 1 - end_of_ctcp);
  74                         return true;
  75                 }
  76
  77                 // The CTCP contains a name and a body.
  78                 name.assign(text, 1, end_of_name - 1);
  79                 return true;
  80         }
  81
  82         bool IsCTCP() const CXX11_OVERRIDE
  83         {
  84                 // According to draft-oakley-irc-ctcp-02 a valid CTCP must begin with SOH and
  85                 // contain at least one octet which is not NUL, SOH, CR, LF, or SPACE. As most
  86                 // of these are restricted at the protocol level we only need to check for SOH
  87                 // and SPACE.
  88                 return (text.length() >= 2) && (text[0] == '\x1') &&  (text[1] != '\x1') && (text[1] != ' ');
  89         }
  90 };
  91
  92 class CommandMessage : public Command
  93 {
  94  private:
  95         const MessageType msgtype;
  96         ChanModeReference moderatedmode;
  97         ChanModeReference noextmsgmode;
  98
  99         /** Send a PRIVMSG or NOTICE message to all local users from the given user
 100          * @param source The user sending the message.
 101          * @param msg The details of the message to send.
 102          */
 103         static void SendAll(User* source, const MessageDetails& details)
 104         {
 105                 ClientProtocol::Messages::Privmsg message(ClientProtocol::Messages::Privmsg::nocopy, source, "$*", details.text, details.type);
 106                 message.AddTags(details.tags_out);
 107                 message.SetSideEffect(true);
 108                 ClientProtocol::Event messageevent(ServerInstance->GetRFCEvents().privmsg, message);
 109
 110                 const UserManager::LocalList& list = ServerInstance->Users.GetLocalUsers();
 111                 for (UserManager::LocalList::const_iterator i = list.begin(); i != list.end(); ++i)
 112                 {
 113                         LocalUser* user = *i;
 114                         if ((user->registered == REG_ALL) && (!details.exemptions.count(user)))
 115                                 user->Send(messageevent);
 116                 }
 117         }
 118
 119  public:
 120         CommandMessage(Module* parent, MessageType mt)
 121                 : Command(parent, ClientProtocol::Messages::Privmsg::CommandStrFromMsgType(mt), 2, 2)
 122                 , msgtype(mt)
 123                 , moderatedmode(parent, "moderated")
 124                 , noextmsgmode(parent, "noextmsg")
 125         {
 126                 syntax = "<target>{,<target>} <message>";
 127         }
 128
 129         /** Handle command.
 130          * @param parameters The parameters to the command
 131          * @param user The user issuing the command
 132          * @return A value from CmdResult to indicate command success or failure.
 133          */
 134         CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE;
 135
 136         RouteDescriptor GetRouting(User* user, const Params& parameters) CXX11_OVERRIDE
 137         {
 138                 if (IS_LOCAL(user))
 139                         // This is handled by the OnUserPostMessage hook to split the LoopCall pieces
 140                         return ROUTE_LOCALONLY;
 141                 else
 142                         return ROUTE_MESSAGE(parameters[0]);
 143         }
 144 };
 145
 146 CmdResult CommandMessage::Handle(User* user, const Params& parameters)
 147 {
 148         User *dest;
 149         Channel *chan;
 150
 151         if (CommandParser::LoopCall(user, this, parameters, 0))
 152                 return CMD_SUCCESS;
 153
 154         if (parameters[0][0] == '$')
 155         {
 156                 if (!user->HasPrivPermission("users/mass-message"))
 157                         return CMD_SUCCESS;
 158
 159                 std::string servername(parameters[0], 1);
 160                 MessageTarget msgtarget(&servername);
 161                 MessageDetailsImpl msgdetails(msgtype, parameters[1], parameters.GetTags());
 162
 163                 ModResult MOD_RESULT;
 164                 FIRST_MOD_RESULT(OnUserPreMessage, MOD_RESULT, (user, msgtarget, msgdetails));
 165                 if (MOD_RESULT == MOD_RES_DENY)
 166                 {
 167                         FOREACH_MOD(OnUserMessageBlocked, (user, msgtarget, msgdetails));
 168                         return CMD_FAILURE;
 169                 }
 170
 171                 FOREACH_MOD(OnUserMessage, (user, msgtarget, msgdetails));
 172                 if (InspIRCd::Match(ServerInstance->Config->ServerName, servername, NULL))
 173                 {
 174                         SendAll(user, msgdetails);
 175                 }
 176                 FOREACH_MOD(OnUserPostMessage, (user, msgtarget, msgdetails));
 177                 return CMD_SUCCESS;
 178         }
 179
 180         char status = 0;
 181         const char* target = parameters[0].c_str();
 182
 183         if (ServerInstance->Modes->FindPrefix(*target))
 184         {
 185                 status = *target;
 186                 target++;
 187         }
 188         if (*target == '#')
 189         {
 190                 chan = ServerInstance->FindChan(target);
 191
 192                 if (chan)
 193                 {
 194                         if (IS_LOCAL(user) && chan->GetPrefixValue(user) < VOICE_VALUE)
 195                         {
 196                                 if (chan->IsModeSet(noextmsgmode) && !chan->HasUser(user))
 197                                 {
 198                                         user->WriteNumeric(ERR_CANNOTSENDTOCHAN, chan->name, "Cannot send to channel (no external messages)");
 199                                         return CMD_FAILURE;
 200                                 }
 201
 202                                 if (chan->IsModeSet(moderatedmode))
 203                                 {
 204                                         user->WriteNumeric(ERR_CANNOTSENDTOCHAN, chan->name, "Cannot send to channel (+m)");
 205                                         return CMD_FAILURE;
 206                                 }
 207
 208                                 if (ServerInstance->Config->RestrictBannedUsers != ServerConfig::BUT_NORMAL)
 209                                 {
 210                                         if (chan->IsBanned(user))
 211                                         {
 212                                                 if (ServerInstance->Config->RestrictBannedUsers == ServerConfig::BUT_RESTRICT_NOTIFY)
 213                                                         user->WriteNumeric(ERR_CANNOTSENDTOCHAN, chan->name, "Cannot send to channel (you're banned)");
 214                                                 return CMD_FAILURE;
 215                                         }
 216                                 }
 217                         }
 218
 219                         MessageTarget msgtarget(chan, status);
 220                         MessageDetailsImpl msgdetails(msgtype, parameters[1], parameters.GetTags());
 221                         msgdetails.exemptions.insert(user);
 222
 223                         ModResult MOD_RESULT;
 224                         FIRST_MOD_RESULT(OnUserPreMessage, MOD_RESULT, (user, msgtarget, msgdetails));
 225                         if (MOD_RESULT == MOD_RES_DENY)
 226                         {
 227                                 FOREACH_MOD(OnUserMessageBlocked, (user, msgtarget, msgdetails));
 228                                 return CMD_FAILURE;
 229                         }
 230
 231                         /* Check again, a module may have zapped the input string */
 232                         if (msgdetails.text.empty())
 233                         {
 234                                 user->WriteNumeric(ERR_NOTEXTTOSEND, "No text to send");
 235                                 return CMD_FAILURE;
 236                         }
 237
 238                         FOREACH_MOD(OnUserMessage, (user, msgtarget, msgdetails));
 239
 240                         ClientProtocol::Messages::Privmsg privmsg(ClientProtocol::Messages::Privmsg::nocopy, user, chan, msgdetails.text, msgdetails.type, msgtarget.status);
 241                         privmsg.AddTags(msgdetails.tags_out);
 242                         privmsg.SetSideEffect(true);
 243                         chan->Write(ServerInstance->GetRFCEvents().privmsg, privmsg, msgtarget.status, msgdetails.exemptions);
 244
 245                         FOREACH_MOD(OnUserPostMessage, (user, msgtarget, msgdetails));
 246                 }
 247                 else
 248                 {
 249                         /* channel does not exist */
 250                         user->WriteNumeric(Numerics::NoSuchChannel(parameters[0]));
 251                         return CMD_FAILURE;
 252                 }
 253                 return CMD_SUCCESS;
 254         }
 255
 256         const char* destnick = parameters[0].c_str();
 257
 258         if (IS_LOCAL(user))
 259         {
 260                 const char* targetserver = strchr(destnick, '@');
 261
 262                 if (targetserver)
 263                 {
 264                         std::string nickonly;
 265
 266                         nickonly.assign(destnick, 0, targetserver - destnick);
 267                         dest = ServerInstance->FindNickOnly(nickonly);
 268                         if (dest && strcasecmp(dest->server->GetName().c_str(), targetserver + 1))
 269                         {
 270                                 /* Incorrect server for user */
 271                                 user->WriteNumeric(Numerics::NoSuchNick(parameters[0]));
 272                                 return CMD_FAILURE;
 273                         }
 274                 }
 275                 else
 276                         dest = ServerInstance->FindNickOnly(destnick);
 277         }
 278         else
 279                 dest = ServerInstance->FindNick(destnick);
 280
 281         if ((dest) && (dest->registered == REG_ALL))
 282         {
 283                 if (parameters[1].empty())
 284                 {
 285                         user->WriteNumeric(ERR_NOTEXTTOSEND, "No text to send");
 286                         return CMD_FAILURE;
 287                 }
 288
 289                 if ((dest->IsAway()) && (msgtype == MSG_PRIVMSG))
 290                 {
 291                         /* auto respond with aweh msg */
 292                         user->WriteNumeric(RPL_AWAY, dest->nick, dest->awaymsg);
 293                 }
 294
 295                 MessageTarget msgtarget(dest);
 296                 MessageDetailsImpl msgdetails(msgtype, parameters[1], parameters.GetTags());
 297
 298
 299                 ModResult MOD_RESULT;
 300                 FIRST_MOD_RESULT(OnUserPreMessage, MOD_RESULT, (user, msgtarget, msgdetails));
 301                 if (MOD_RESULT == MOD_RES_DENY)
 302                 {
 303                         FOREACH_MOD(OnUserMessageBlocked, (user, msgtarget, msgdetails));
 304                         return CMD_FAILURE;
 305                 }
 306
 307                 FOREACH_MOD(OnUserMessage, (user, msgtarget, msgdetails));
 308
 309                 LocalUser* const localtarget = IS_LOCAL(dest);
 310                 if (localtarget)
 311                 {
 312                         // direct write, same server
 313                         ClientProtocol::Messages::Privmsg privmsg(ClientProtocol::Messages::Privmsg::nocopy, user, localtarget->nick, msgdetails.text, msgtype);
 314                         privmsg.AddTags(msgdetails.tags_out);
 315                         privmsg.SetSideEffect(true);
 316                         localtarget->Send(ServerInstance->GetRFCEvents().privmsg, privmsg);
 317                 }
 318
 319                 FOREACH_MOD(OnUserPostMessage, (user, msgtarget, msgdetails));
 320         }
 321         else
 322         {
 323                 /* no such nick/channel */
 324                 user->WriteNumeric(Numerics::NoSuchNick(parameters[0]));
 325                 return CMD_FAILURE;
 326         }
 327         return CMD_SUCCESS;
 328 }
 329
 330 class ModuleCoreMessage : public Module
 331 {
 332  private:
 333         CommandMessage cmdprivmsg;
 334         CommandMessage cmdnotice;
 335
 336  public:
 337         ModuleCoreMessage()
 338                 : cmdprivmsg(this, MSG_PRIVMSG)
 339                 , cmdnotice(this, MSG_NOTICE)
 340         {
 341         }
 342
 343         void OnUserPostMessage(User* user, const MessageTarget& target, const MessageDetails& details) CXX11_OVERRIDE
 344         {
 345                 // We only handle the idle times of local users.
 346                 LocalUser* luser = IS_LOCAL(user);
 347                 if (!luser)
 348                         return;
 349
 350                 // We don't update the idle time when a CTCP reply is sent.
 351                 if (details.type == MSG_NOTICE && details.IsCTCP())
 352                         return;
 353
 354                 luser->idle_lastmsg = ServerInstance->Time();
 355         }
 356
 357         Version GetVersion() CXX11_OVERRIDE
 358         {
 359                 return Version("PRIVMSG, NOTICE", VF_CORE|VF_VENDOR);
 360         }
 361 };
 362
 363 MODULE_INIT(ModuleCoreMessage)