/* * InspIRCd -- Internet Relay Chat Daemon * * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org> * Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net> * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com> * Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc> * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net> * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org> * Copyright (C) 2006 Jamie ??? <???@???> * * This file is part of InspIRCd. InspIRCd is free software: you can * redistribute it and/or modify it under the terms of the GNU General Public * License as published by the Free Software Foundation, version 2. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "inspircd.h" /* $ModDesc: Provides support for the /DCCALLOW command */ class BannedFileList { public: std::string filemask; std::string action; }; class DCCAllow { public: std::string nickname; std::string hostmask; time_t set_on; long length; DCCAllow() { } DCCAllow(const std::string &nick, const std::string &hm, const time_t so, const long ln) : nickname(nick), hostmask(hm), set_on(so), length(ln) { } }; typedef std::vector<User *> userlist; userlist ul; typedef std::vector<DCCAllow> dccallowlist; dccallowlist* dl; typedef std::vector<BannedFileList> bannedfilelist; bannedfilelist bfl; SimpleExtItem<dccallowlist>* ext; class CommandDccallow : public Command { public: CommandDccallow(Module* parent) : Command(parent, "DCCALLOW", 0) { syntax = "{[+|-]<nick> <time>|HELP|LIST}"; /* XXX we need to fix this so it can work with translation stuff (i.e. move +- into a seperate param */ } CmdResult Handle(const std::vector<std::string> ¶meters, User *user) { /* syntax: DCCALLOW [+|-]<nick> (<time>) */ if (!parameters.size()) { // display current DCCALLOW list DisplayDCCAllowList(user); return CMD_FAILURE; } else if (parameters.size() > 0) { char action = *parameters[0].c_str(); // if they didn't specify an action, this is probably a command if (action != '+' && action != '-') { if (!strcasecmp(parameters[0].c_str(), "LIST")) { // list current DCCALLOW list DisplayDCCAllowList(user); return CMD_FAILURE; } else if (!strcasecmp(parameters[0].c_str(), "HELP")) { // display help DisplayHelp(user); return CMD_FAILURE; } else { user->WriteNumeric(998, "%s :DCCALLOW command not understood. For help on DCCALLOW, type /DCCALLOW HELP", user->nick.c_str()); return CMD_FAILURE; } } std::string nick = parameters[0].substr(1); User *target = ServerInstance->FindNickOnly(nick); if ((target) && (!IS_SERVER(target)) && (!target->quitting) && (target->registered == REG_ALL)) { if (action == '-') { // check if it contains any entries dl = ext->get(user); if (dl) { for (dccallowlist::iterator i = dl->begin(); i != dl->end(); ++i) { // search through list if (i->nickname == target->nick) { dl->erase(i); user->WriteNumeric(995, "%s %s :Removed %s from your DCCALLOW list", user->nick.c_str(), user->nick.c_str(), target->nick.c_str()); break; } } } } else if (action == '+') { if (target == user) { user->WriteNumeric(996, "%s %s :You cannot add yourself to your own DCCALLOW list!", user->nick.c_str(), user->nick.c_str()); return CMD_FAILURE; } dl = ext->get(user); if (!dl) { dl = new dccallowlist; ext->set(user, dl); // add this user to the userlist ul.push_back(user); } for (dccallowlist::const_iterator k = dl->begin(); k != dl->end(); ++k) { if (k->nickname == target->nick) { user->WriteNumeric(996, "%s %s :%s is already on your DCCALLOW list", user->nick.c_str(), user->nick.c_str(), target->nick.c_str()); return CMD_FAILURE; } } std::string mask = std::string(target->nick)+"!"+std::string(target->ident)+"@"+std::string(target->dhost); ConfigReader Conf; std::string default_length = Conf.ReadValue("dccallow", "length", 0); long length; if (parameters.size() < 2) { length = ServerInstance->Duration(default_length); } else if (!atoi(parameters[1].c_str())) { length = 0; } else { length = ServerInstance->Duration(parameters[1]); } if (!ServerInstance->IsValidMask(mask.c_str())) { return CMD_FAILURE; } dl->push_back(DCCAllow(target->nick, mask, ServerInstance->Time(), length)); if (length > 0) { user->WriteNumeric(993, "%s %s :Added %s to DCCALLOW list for %ld seconds", user->nick.c_str(), user->nick.c_str(), target->nick.c_str(), length); } else { user->WriteNumeric(994, "%s %s :Added %s to DCCALLOW list for this session", user->nick.c_str(), user->nick.c_str(), target->nick.c_str()); } /* route it. */ return CMD_SUCCESS; } } else { // nick doesn't exist user->WriteNumeric(401, "%s %s :No such nick/channel", user->nick.c_str(), nick.c_str()); return CMD_FAILURE; } } return CMD_FAILURE; } RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters) { return ROUTE_BROADCAST; } void DisplayHelp(User* user) { user->WriteNumeric(998, "%s :DCCALLOW [<+|->nick [time]] [list] [help]", user->nick.c_str()); user->WriteNumeric(998, "%s :You may allow DCCs from specific users by specifying a", user->nick.c_str()); user->WriteNumeric(998, "%s :DCC allow for the user you want to receive DCCs from.", user->nick.c_str()); user->WriteNumeric(998, "%s :For example, to allow the user Brain to send you inspircd.exe", user->nick.c_str()); user->WriteNumeric(998, "%s :you would type:", user->nick.c_str()); user->WriteNumeric(998, "%s :/DCCALLOW +Brain", user->nick.c_str()); user->WriteNumeric(998, "%s :Brain would then be able to send you files. They would have to", user->nick.c_str()); user->WriteNumeric(998, "%s :resend the file again if the server gave them an error message", user->nick.c_str()); user->WriteNumeric(998, "%s :before you added them to your DCCALLOW list.", user->nick.c_str()); user->WriteNumeric(998, "%s :DCCALLOW entries will be temporary by default, if you want to add", user->nick.c_str()); user->WriteNumeric(998, "%s :them to your DCCALLOW list until you leave IRC, type:", user->nick.c_str()); user->WriteNumeric(998, "%s :/DCCALLOW +Brain 0", user->nick.c_str()); user->WriteNumeric(998, "%s :To remove the user from your DCCALLOW list, type:", user->nick.c_str()); user->WriteNumeric(998, "%s :/DCCALLOW -Brain", user->nick.c_str()); user->WriteNumeric(998, "%s :To see the users in your DCCALLOW list, type:", user->nick.c_str()); user->WriteNumeric(998, "%s :/DCCALLOW LIST", user->nick.c_str()); user->WriteNumeric(998, "%s :NOTE: If the user leaves IRC or changes their nickname", user->nick.c_str()); user->WriteNumeric(998, "%s : they will be removed from your DCCALLOW list.", user->nick.c_str()); user->WriteNumeric(998, "%s : your DCCALLOW list will be deleted when you leave IRC.", user->nick.c_str()); user->WriteNumeric(999, "%s :End of DCCALLOW HELP", user->nick.c_str()); } void DisplayDCCAllowList(User* user) { // display current DCCALLOW list user->WriteNumeric(990, "%s :Users on your DCCALLOW list:", user->nick.c_str()); dl = ext->get(user); if (dl) { for (dccallowlist::const_iterator c = dl->begin(); c != dl->end(); ++c) { user->WriteNumeric(991, "%s %s :%s (%s)", user->nick.c_str(), user->nick.c_str(), c->nickname.c_str(), c->hostmask.c_str()); } } user->WriteNumeric(992, "%s :End of DCCALLOW list", user->nick.c_str()); } }; class ModuleDCCAllow : public Module { CommandDccallow cmd; public: ModuleDCCAllow() : cmd(this) { ext = new SimpleExtItem<dccallowlist>("dccallow", this); ServerInstance->Extensions.Register(ext); ServerInstance->AddCommand(&cmd); ReadFileConf(); Implementation eventlist[] = { I_OnUserPreMessage, I_OnUserPreNotice, I_OnUserQuit, I_OnUserPostNick, I_OnRehash }; ServerInstance->Modules->Attach(eventlist, this, 5); } virtual void OnRehash(User* user) { ReadFileConf(); } virtual void OnUserQuit(User* user, const std::string &reason, const std::string &oper_message) { dccallowlist* udl = ext->get(user); // remove their DCCALLOW list if they have one if (udl) { userlist::iterator it = std::find(ul.begin(), ul.end(), user); if (it != ul.end()) ul.erase(it); } // remove them from any DCCALLOW lists // they are currently on RemoveNick(user); } virtual void OnUserPostNick(User* user, const std::string &oldnick) { RemoveNick(user); } virtual ModResult OnUserPreMessage(User* user, void* dest, int target_type, std::string &text, char status, CUList &exempt_list) { return OnUserPreNotice(user, dest, target_type, text, status, exempt_list); } virtual ModResult OnUserPreNotice(User* user, void* dest, int target_type, std::string &text, char status, CUList &exempt_list) { if (!IS_LOCAL(user)) return MOD_RES_PASSTHRU; if (target_type == TYPE_USER) { User* u = (User*)dest; /* Always allow a user to dcc themselves (although... why?) */ if (user == u) return MOD_RES_PASSTHRU; if ((text.length()) && (text[0] == '\1')) { Expire(); // :jamie!jamie@test-D4457903BA652E0F.silverdream.org PRIVMSG eimaj :DCC SEND m_dnsbl.cpp 3232235786 52650 9676 // :jamie!jamie@test-D4457903BA652E0F.silverdream.org PRIVMSG eimaj :VERSION if (strncmp(text.c_str(), "\1DCC ", 5) == 0) { dl = ext->get(u); if (dl && dl->size()) { for (dccallowlist::const_iterator iter = dl->begin(); iter != dl->end(); ++iter) if (InspIRCd::Match(user->GetFullHost(), iter->hostmask)) return MOD_RES_PASSTHRU; } // tokenize std::stringstream ss(text); std::string buf; std::vector<std::string> tokens; while (ss >> buf) tokens.push_back(buf); irc::string type = tokens[1].c_str(); ConfigReader Conf; bool blockchat = Conf.ReadFlag("dccallow", "blockchat", 0); if (type == "SEND") { std::string defaultaction = Conf.ReadValue("dccallow", "action", 0); std::string filename = tokens[2]; bool found = false; for (unsigned int i = 0; i < bfl.size(); i++) { if (InspIRCd::Match(filename, bfl[i].filemask, ascii_case_insensitive_map)) { /* We have a matching badfile entry, override whatever the default action is */ if (bfl[i].action == "allow") return MOD_RES_PASSTHRU; else { found = true; break; } } } /* only follow the default action if no badfile matches were found above */ if ((!found) && (defaultaction == "allow")) return MOD_RES_PASSTHRU; user->WriteServ("NOTICE %s :The user %s is not accepting DCC SENDs from you. Your file %s was not sent.", user->nick.c_str(), u->nick.c_str(), filename.c_str()); u->WriteServ("NOTICE %s :%s (%s@%s) attempted to send you a file named %s, which was blocked.", u->nick.c_str(), user->nick.c_str(), user->ident.c_str(), user->dhost.c_str(), filename.c_str()); u->WriteServ("NOTICE %s :If you trust %s and were expecting this, you can type /DCCALLOW HELP for information on the DCCALLOW system.", u->nick.c_str(), user->nick.c_str()); return MOD_RES_DENY; } else if ((type == "CHAT") && (blockchat)) { user->WriteServ("NOTICE %s :The user %s is not accepting DCC CHAT requests from you.", user->nick.c_str(), u->nick.c_str()); u->WriteServ("NOTICE %s :%s (%s@%s) attempted to initiate a DCC CHAT session, which was blocked.", u->nick.c_str(), user->nick.c_str(), user->ident.c_str(), user->dhost.c_str()); u->WriteServ("NOTICE %s :If you trust %s and were expecting this, you can type /DCCALLOW HELP for information on the DCCALLOW system.", u->nick.c_str(), user->nick.c_str()); return MOD_RES_DENY; } } } } return MOD_RES_PASSTHRU; } void Expire() { for (userlist::iterator iter = ul.begin(); iter != ul.end();) { User* u = (User*)(*iter); dl = ext->get(u); if (dl) { if (dl->size()) { dccallowlist::iterator iter2 = dl->begin(); while (iter2 != dl->end()) { if (iter2->length != 0 && (iter2->set_on + iter2->length) <= ServerInstance->Time()) { u->WriteNumeric(997, "%s %s :DCCALLOW entry for %s has expired", u->nick.c_str(), u->nick.c_str(), iter2->nickname.c_str()); iter2 = dl->erase(iter2); } else { ++iter2; } } } ++iter; } else { iter = ul.erase(iter); } } } void RemoveNick(User* user) { /* Iterate through all DCCALLOW lists and remove user */ for (userlist::iterator iter = ul.begin(); iter != ul.end();) { User *u = (User*)(*iter); dl = ext->get(u); if (dl) { if (dl->size()) { for (dccallowlist::iterator i = dl->begin(); i != dl->end(); ++i) { if (i->nickname == user->nick) { u->WriteServ("NOTICE %s :%s left the network or changed their nickname and has been removed from your DCCALLOW list", u->nick.c_str(), i->nickname.c_str()); u->WriteNumeric(995, "%s %s :Removed %s from your DCCALLOW list", u->nick.c_str(), u->nick.c_str(), i->nickname.c_str()); dl->erase(i); break; } } } ++iter; } else { iter = ul.erase(iter); } } } void RemoveFromUserlist(User *user) { // remove user from userlist for (userlist::iterator j = ul.begin(); j != ul.end(); ++j) { User* u = (User*)(*j); if (u == user) { ul.erase(j); break; } } } void ReadFileConf() { ConfigReader Conf; bfl.clear(); for (int i = 0; i < Conf.Enumerate("banfile"); i++) { BannedFileList bf; std::string fileglob = Conf.ReadValue("banfile", "pattern", i); std::string action = Conf.ReadValue("banfile", "action", i); bf.filemask = fileglob; bf.action = action; bfl.push_back(bf); } } virtual ~ModuleDCCAllow() { delete ext; } virtual Version GetVersion() { return Version("Provides support for the /DCCALLOW command", VF_COMMON | VF_VENDOR); } }; MODULE_INIT(ModuleDCCAllow)