/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * InspIRCd: (C) 2002-2009 InspIRCd Development Team * See: http://www.inspircd.org/wiki/index.php/Credits * * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #include "inspircd.h" /* $ModDesc: Povides support for the /DCCALLOW command */ static ConfigReader *Conf; class BannedFileList : public classbase { public: std::string filemask; std::string action; }; class DCCAllow : public classbase { 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; class CommandDccallow : public Command { public: CommandDccallow(InspIRCd* Me) : Command(Me, "DCCALLOW", 0, 0) { this->source = "m_dccallow.so"; 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->FindNick(nick); if (target) { if (action == '-') { // check if it contains any entries if (user->GetExt("dccallow_list", 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 { delete dl; user->Shrink("dccallow_list"); // remove from userlist for (userlist::iterator j = ul.begin(); j != ul.end(); ++j) { User* u = (User*)(*j); if (u == user) { ul.erase(j); 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; } if (!user->GetExt("dccallow_list", dl)) { dl = new dccallowlist; user->Extend("dccallow_list", 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); 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; } 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()); if (user->GetExt("dccallow_list", 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* mycommand; public: ModuleDCCAllow(InspIRCd* Me) : Module(Me) { Conf = new ConfigReader(ServerInstance); mycommand = new CommandDccallow(ServerInstance); ServerInstance->AddCommand(mycommand); ReadFileConf(); Implementation eventlist[] = { I_OnUserPreMessage, I_OnUserPreNotice, I_OnUserQuit, I_OnUserPreNick, I_OnRehash }; ServerInstance->Modules->Attach(eventlist, this, 5); } virtual void OnRehash(User* user, const std::string ¶meter) { delete Conf; Conf = new ConfigReader(ServerInstance); } virtual void OnUserQuit(User* user, const std::string &reason, const std::string &oper_message) { dccallowlist* udl; // remove their DCCALLOW list if they have one if (user->GetExt("dccallow_list", udl)) { delete udl; user->Shrink("dccallow_list"); RemoveFromUserlist(user); } // remove them from any DCCALLOW lists // they are currently on RemoveNick(user); } virtual int OnUserPreNick(User* user, const std::string &newnick) { RemoveNick(user); return 0; } virtual int 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 int OnUserPreNotice(User* user, void* dest, int target_type, std::string &text, char status, CUList &exempt_list) { if (!IS_LOCAL(user)) return 0; if (target_type == TYPE_USER) { User* u = (User*)dest; /* Always allow a user to dcc themselves (although... why?) */ if (user == u) return 0; 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) { if (u->GetExt("dccallow_list", dl) && dl->size()) { for (dccallowlist::const_iterator iter = dl->begin(); iter != dl->end(); ++iter) if (InspIRCd::Match(user->GetFullHost(), iter->hostmask)) return 0; } // 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(); bool blockchat = Conf->ReadFlag("dccallow", "blockchat", 0); if (type == "SEND") { std::string defaultaction = Conf->ReadValue("dccallow", "action", 0); std::string filename = tokens[2]; if (defaultaction == "allow") return 0; for (unsigned int i = 0; i < bfl.size(); i++) { if (InspIRCd::Match(filename, bfl[i].filemask, ascii_case_insensitive_map)) { if (bfl[i].action == "allow") return 0; } else { if (defaultaction == "allow") return 0; } } 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 1; } 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 1; } } } } return 0; } void Expire() { for (userlist::iterator iter = ul.begin(); iter != ul.end(); ++iter) { User* u = (User*)(*iter); if (u->GetExt("dccallow_list", 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; } } } } else { RemoveFromUserlist(u); } } } void RemoveNick(User* user) { /* Iterate through all DCCALLOW lists and remove user */ for (userlist::iterator iter = ul.begin(); iter != ul.end(); ++iter) { User *u = (User*)(*iter); if (u->GetExt("dccallow_list", 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; } } } } else { RemoveFromUserlist(u); } } } 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() { 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() { } virtual Version GetVersion() { return Version("$Id$", VF_COMMON | VF_VENDOR, API_VERSION); } }; MODULE_INIT(ModuleDCCAllow)