/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * InspIRCd: (C) 2002-2009 InspIRCd Development Team * See: http://wiki.inspircd.org/Credits * * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #include "inspircd.h" /* $ModDesc: Provides aliases of commands. */ /** An alias definition */ class Alias { public: /** The text of the alias command */ irc::string AliasedCommand; /** Text to replace with */ std::string ReplaceFormat; /** Nickname required to perform alias */ std::string RequiredNick; /** Alias requires ulined server */ bool ULineOnly; /** Requires oper? */ bool OperOnly; /* is case sensitive params */ bool CaseSensitive; /* whether or not it may be executed via fantasy (default OFF) */ bool ChannelCommand; /* whether or not it may be executed via /command (default ON) */ bool UserCommand; /** Format that must be matched for use */ std::string format; }; class ModuleAlias : public Module { private: char fprefix; /* We cant use a map, there may be multiple aliases with the same name. * We can, however, use a fancy invention: the multimap. Maps a key to one or more values. * -- w00t */ std::multimap Aliases; /* whether or not +B users are allowed to use fantasy commands */ bool AllowBots; virtual void ReadAliases() { ConfigReader MyConf; AllowBots = MyConf.ReadFlag("fantasy", "allowbots", "no", 0); std::string fpre = MyConf.ReadValue("fantasy","prefix",0); fprefix = fpre.empty() ? '!' : fpre[0]; Aliases.clear(); for (int i = 0;; i++) { ConfigTag* tag = ServerInstance->Config->ConfValue("alias", i); if (!tag) break; Alias a; a.AliasedCommand = tag->getString("text").c_str(); tag->readString("replace", a.ReplaceFormat, true); a.RequiredNick = tag->getString("requires"); a.ULineOnly = tag->getBool("uline"); a.ChannelCommand = tag->getBool("channelcommand", "no"); a.UserCommand = tag->getBool("usercommand", "yes"); a.OperOnly = tag->getBool("operonly"); a.format = tag->getString("format"); a.CaseSensitive = tag->getBool("matchcase"); Aliases.insert(std::make_pair(a.AliasedCommand, a)); } } public: ModuleAlias() { ReadAliases(); ServerInstance->Modules->Attach(I_OnPreCommand, this); ServerInstance->Modules->Attach(I_OnRehash, this); ServerInstance->Modules->Attach(I_OnUserMessage, this); } virtual ~ModuleAlias() { } virtual Version GetVersion() { return Version("Provides aliases of commands.", VF_VENDOR); } std::string GetVar(std::string varname, const std::string &original_line) { irc::spacesepstream ss(original_line); varname.erase(varname.begin()); int index = *(varname.begin()) - 48; varname.erase(varname.begin()); bool everything_after = (varname == "-"); std::string word; for (int j = 0; j < index; j++) ss.GetToken(word); if (everything_after) { std::string more; while (ss.GetToken(more)) { word.append(" "); word.append(more); } } return word; } virtual ModResult OnPreCommand(std::string &command, std::vector ¶meters, User *user, bool validated, const std::string &original_line) { std::multimap::iterator i, upperbound; /* If theyre not registered yet, we dont want * to know. */ if (user->registered != REG_ALL) return MOD_RES_PASSTHRU; /* We dont have any commands looking like this? Stop processing. */ i = Aliases.find(command.c_str()); if (i == Aliases.end()) return MOD_RES_PASSTHRU; /* Avoid iterating on to different aliases if no patterns match. */ upperbound = Aliases.upper_bound(command.c_str()); irc::string c = command.c_str(); /* The parameters for the command in their original form, with the command stripped off */ std::string compare = original_line.substr(command.length()); while (*(compare.c_str()) == ' ') compare.erase(compare.begin()); while (i != upperbound) { if (i->second.UserCommand) { if (DoAlias(user, NULL, &(i->second), compare, original_line)) { return MOD_RES_DENY; } } i++; } // If we made it here, no aliases actually matched. return MOD_RES_PASSTHRU; } virtual void OnUserMessage(User *user, void *dest, int target_type, const std::string &text, char status, const CUList &exempt_list) { if (target_type != TYPE_CHANNEL) { return; } // fcommands are only for local users. Spanningtree will send them back out as their original cmd. if (!user || !IS_LOCAL(user)) { return; } /* Stop here if the user is +B and allowbot is set to no. */ if (!AllowBots && user->IsModeSet('B')) { return; } Channel *c = (Channel *)dest; std::string scommand; // text is like "!moo cows bite me", we want "!moo" first irc::spacesepstream ss(text); ss.GetToken(scommand); irc::string fcommand = scommand.c_str(); if (fcommand.empty()) { return; // wtfbbq } // we don't want to touch non-fantasy stuff if (*fcommand.c_str() != fprefix) { return; } // nor do we give a shit about the prefix fcommand.erase(fcommand.begin()); std::multimap::iterator i = Aliases.find(fcommand); if (i == Aliases.end()) return; /* Avoid iterating on to other aliases if no patterns match */ std::multimap::iterator upperbound = Aliases.upper_bound(fcommand); /* The parameters for the command in their original form, with the command stripped off */ std::string compare = text.substr(fcommand.length() + 1); while (*(compare.c_str()) == ' ') compare.erase(compare.begin()); while (i != upperbound) { if (i->second.ChannelCommand) { // We use substr(1) here to remove the fantasy prefix if (DoAlias(user, c, &(i->second), compare, text.substr(1))) return; } i++; } } int DoAlias(User *user, Channel *c, Alias *a, const std::string compare, const std::string safe) { User *u = NULL; /* Does it match the pattern? */ if (!a->format.empty()) { if (a->CaseSensitive) { if (!InspIRCd::Match(compare, a->format, rfc_case_sensitive_map)) return 0; } else { if (!InspIRCd::Match(compare, a->format)) return 0; } } if ((a->OperOnly) && (!IS_OPER(user))) return 0; if (!a->RequiredNick.empty()) { u = ServerInstance->FindNick(a->RequiredNick); if (!u) { user->WriteNumeric(401, ""+std::string(user->nick)+" "+a->RequiredNick+" :is currently unavailable. Please try again later."); return 1; } } if ((u != NULL) && (!a->RequiredNick.empty()) && (a->ULineOnly)) { if (!ServerInstance->ULine(u->server)) { ServerInstance->SNO->WriteToSnoMask('a', "NOTICE -- Service "+a->RequiredNick+" required by alias "+std::string(a->AliasedCommand.c_str())+" is not on a u-lined server, possibly underhanded antics detected!"); user->WriteNumeric(401, ""+std::string(user->nick)+" "+a->RequiredNick+" :is an imposter! Please inform an IRC operator as soon as possible."); return 1; } } /* Now, search and replace in a copy of the original_line, replacing $1 through $9 and $1- etc */ std::string::size_type crlf = a->ReplaceFormat.find('\n'); if (crlf == std::string::npos) { DoCommand(a->ReplaceFormat, user, c, safe); return 1; } else { irc::sepstream commands(a->ReplaceFormat, '\n'); std::string scommand; while (commands.GetToken(scommand)) { DoCommand(scommand, user, c, safe); } return 1; } } void DoCommand(std::string newline, User* user, Channel *c, const std::string &original_line) { std::vector pars; for (int v = 1; v < 10; v++) { std::string var = "$"; var.append(ConvToStr(v)); var.append("-"); std::string::size_type x = newline.find(var); while (x != std::string::npos) { newline.erase(x, var.length()); newline.insert(x, GetVar(var, original_line)); x = newline.find(var); } var = "$"; var.append(ConvToStr(v)); x = newline.find(var); while (x != std::string::npos) { newline.erase(x, var.length()); newline.insert(x, GetVar(var, original_line)); x = newline.find(var); } } /* Special variables */ SearchAndReplace(newline, std::string("$nick"), user->nick); SearchAndReplace(newline, std::string("$ident"), user->ident); SearchAndReplace(newline, std::string("$host"), user->host); SearchAndReplace(newline, std::string("$vhost"), user->dhost); if (c) { /* Channel specific variables */ SearchAndReplace(newline, std::string("$chan"), c->name); } else { /* We don't want these in a user alias */ SearchAndReplace(newline, std::string("$chan"), std::string("")); } irc::tokenstream ss(newline); pars.clear(); std::string command, token; ss.GetToken(command); while (ss.GetToken(token) && (pars.size() <= MAXPARAMETERS)) { pars.push_back(token); } ServerInstance->Parser->CallHandler(command, pars, user); } virtual void OnRehash(User* user) { ReadAliases(); } virtual void Prioritize() { // Prioritise after spanningtree so that channel aliases show the alias before the effects. Module* linkmod = ServerInstance->Modules->Find("m_spanningtree.so"); ServerInstance->Modules->SetPriority(this, I_OnUserMessage, PRIORITY_AFTER, &linkmod); } }; MODULE_INIT(ModuleAlias)