#include <bridge/bridge.hpp> #include <bridge/list_element.hpp> #include <xmpp/biboumi_component.hpp> #include <network/poller.hpp> #include <utils/empty_if_fixed_server.hpp> #include <utils/encoding.hpp> #include <utils/tolower.hpp> #include <logger/logger.hpp> #include <utils/revstr.hpp> #include <utils/split.hpp> #include <xmpp/jid.hpp> using namespace std::string_literals; static const char* action_prefix = "\01ACTION "; Bridge::Bridge(const std::string& user_jid, BiboumiComponent* xmpp, std::shared_ptr<Poller> poller): user_jid(user_jid), xmpp(xmpp), poller(poller) { } Bridge::~Bridge() { } /** * Return the role and affiliation, corresponding to the given irc mode */ static std::tuple<std::string, std::string> get_role_affiliation_from_irc_mode(const char mode) { if (mode == 'a' || mode == 'q') return std::make_tuple("moderator", "owner"); else if (mode == 'o') return std::make_tuple("moderator", "admin"); else if (mode == 'h') return std::make_tuple("moderator", "member"); else if (mode == 'v') return std::make_tuple("participant", "member"); else return std::make_tuple("participant", "none"); } void Bridge::shutdown(const std::string& exit_message) { for (auto it = this->irc_clients.begin(); it != this->irc_clients.end(); ++it) { it->second->send_quit_command(exit_message); it->second->leave_dummy_channel(exit_message); } } void Bridge::clean() { auto it = this->irc_clients.begin(); while (it != this->irc_clients.end()) { IrcClient* client = it->second.get(); if (!client->is_connected() && !client->is_connecting() && !client->get_resolver().is_resolving()) it = this->irc_clients.erase(it); else ++it; } } const std::string& Bridge::get_jid() const { return this->user_jid; } std::string Bridge::get_bare_jid() const { Jid jid(this->user_jid); return jid.local + "@" + jid.domain; } Xmpp::body Bridge::make_xmpp_body(const std::string& str) { std::string res; if (utils::is_valid_utf8(str.c_str())) res = str; else res = utils::convert_to_utf8(str, "ISO-8859-1"); return irc_format_to_xhtmlim(res); } IrcClient* Bridge::make_irc_client(const std::string& hostname, const std::string& nickname) { try { return this->irc_clients.at(hostname).get(); } catch (const std::out_of_range& exception) { auto username = nickname; auto realname = nickname; Jid jid(this->user_jid); if (Config::get("realname_from_jid", "false") == "true") { username = jid.local; realname = this->get_bare_jid(); } this->irc_clients.emplace(hostname, std::make_shared<IrcClient>(this->poller, hostname, nickname, username, realname, jid.domain, this)); std::shared_ptr<IrcClient> irc = this->irc_clients.at(hostname); return irc.get(); } } IrcClient* Bridge::get_irc_client(const std::string& hostname) { try { return this->irc_clients.at(hostname).get(); } catch (const std::out_of_range& exception) { throw IRCNotConnected(hostname); } } IrcClient* Bridge::find_irc_client(const std::string& hostname) { try { return this->irc_clients.at(hostname).get(); } catch (const std::out_of_range& exception) { return nullptr; } } bool Bridge::join_irc_channel(const Iid& iid, const std::string& nickname, const std::string& password) { IrcClient* irc = this->make_irc_client(iid.get_server(), nickname); if (iid.get_local().empty()) { // Join the dummy channel if (irc->is_welcomed()) { if (irc->get_dummy_channel().joined) return false; // Immediately simulate a message coming from the IRC server saying that we // joined the channel const IrcMessage join_message(irc->get_nick(), "JOIN", {""}); irc->on_channel_join(join_message); const IrcMessage end_join_message(std::string(iid.get_server()), "366", {irc->get_nick(), "", "End of NAMES list"}); irc->on_channel_completely_joined(end_join_message); } else { irc->get_dummy_channel().joining = true; irc->start(); } return true; } if (irc->is_channel_joined(iid.get_local()) == false) { irc->send_join_command(iid.get_local(), password); return true; } return false; } void Bridge::send_channel_message(const Iid& iid, const std::string& body) { if (iid.get_server().empty()) { this->xmpp->send_stanza_error("message", this->user_jid, std::to_string(iid), "", "cancel", "remote-server-not-found", std::to_string(iid) + " is not a valid channel name. " "A correct room jid is of the form: #<chan>%<server>", false); return; } IrcClient* irc = this->get_irc_client(iid.get_server()); // Because an IRC message cannot contain \n, we need to convert each line // of text into a separate IRC message. For conveniance, we also cut the // message into submessages on the XMPP side, this way the user of the // gateway sees what was actually sent over IRC. For example if an user // sends “hello\n/me waves”, two messages will be generated: “hello” and // “/me waves”. Note that the “command” handling (messages starting with // /me, /mode, etc) is done for each message generated this way. In the // above example, the /me will be interpreted. std::vector<std::string> lines = utils::split(body, '\n', true); if (lines.empty()) return ; for (const std::string& line: lines) { if (line.substr(0, 5) == "/mode") { std::vector<std::string> args = utils::split(line.substr(5), ' ', false); irc->send_mode_command(iid.get_local(), args); continue; // We do not want to send that back to the // XMPP user, that’s not a textual message. } else if (line.substr(0, 4) == "/me ") irc->send_channel_message(iid.get_local(), action_prefix + line.substr(4) + "\01"); else irc->send_channel_message(iid.get_local(), line); this->xmpp->send_muc_message(std::to_string(iid), irc->get_own_nick(), this->make_xmpp_body(line), this->user_jid); } } void Bridge::forward_affiliation_role_change(const Iid& iid, const std::string& nick, const std::string& affiliation, const std::string& role) { IrcClient* irc = this->get_irc_client(iid.get_server()); IrcChannel* chan = irc->get_channel(iid.get_local()); if (!chan || !chan->joined) return; IrcUser* user = chan->find_user(nick); if (!user) return; // For each affiliation or role, we have a “maximal” mode that we want to // set. We must remove any superior mode at the same time. For example if // the user already has +o mode, and we set its affiliation to member, we // remove the +o mode, and add +v. For each “superior” mode (for example, // for +v, the superior modes are 'h', 'a', 'o' and 'q') we check if that // user has it, and if yes we remove that mode std::size_t nb = 1; // the number of times the nick must be // repeated in the argument list std::string modes; // The string of modes to // add/remove. For example "+v-aoh" std::vector<char> modes_to_remove; // List of modes to check for removal if (affiliation == "none") { modes = ""; nb = 0; modes_to_remove = {'v', 'h', 'o', 'a', 'q'}; } else if (affiliation == "member") { modes = "+v"; modes_to_remove = {'h', 'o', 'a', 'q'}; } else if (role == "moderator") { modes = "+h"; modes_to_remove = {'o', 'a', 'q'}; } else if (affiliation == "admin") { modes = "+o"; modes_to_remove = {'a', 'q'}; } else if (affiliation == "owner") { modes = "+a"; modes_to_remove = {'q'}; } else return; for (const char mode: modes_to_remove) if (user->modes.find(mode) != user->modes.end()) { modes += "-"s + mode; nb++; } if (modes.empty()) return; std::vector<std::string> args(nb, nick); args.insert(args.begin(), modes); irc->send_mode_command(iid.get_local(), args); } void Bridge::send_private_message(const Iid& iid, const std::string& body, const std::string& type) { if (iid.get_local().empty() || iid.get_server().empty()) { this->xmpp->send_stanza_error("message", this->user_jid, std::to_string(iid), "", "cancel", "remote-server-not-found", std::to_string(iid) + " is not a valid channel name. " "A correct room jid is of the form: #<chan>%<server>", false); return; } IrcClient* irc = this->get_irc_client(iid.get_server()); std::vector<std::string> lines = utils::split(body, '\n', true); if (lines.empty()) return ; for (const std::string& line: lines) { if (line.substr(0, 4) == "/me ") irc->send_private_message(iid.get_local(), action_prefix + line.substr(4) + "\01", type); else irc->send_private_message(iid.get_local(), line, type); } } void Bridge::send_raw_message(const std::string& hostname, const std::string& body) { IrcClient* irc = this->get_irc_client(hostname); irc->send_raw(body); } void Bridge::leave_irc_channel(Iid&& iid, std::string&& status_message) { IrcClient* irc = this->get_irc_client(iid.get_server()); irc->send_part_command(iid.get_local(), status_message); } void Bridge::send_irc_nick_change(const Iid& iid, const std::string& new_nick) { IrcClient* irc = this->get_irc_client(iid.get_server()); irc->send_nick_command(new_nick); } void Bridge::send_irc_channel_list_request(const Iid& iid, const std::string& iq_id, const std::string& to_jid) { IrcClient* irc = this->get_irc_client(iid.get_server()); irc->send_list_command(); irc_responder_callback_t cb = [this, iid, iq_id, to_jid](const std::string& irc_hostname, const IrcMessage& message) -> bool { static std::vector<ListElement> list; if (irc_hostname != iid.get_server()) return false; if (message.command == "263" || message.command == "RPL_TRYAGAIN" || message.command == "ERR_TOOMANYMATCHES" || message.command == "ERR_NOSUCHSERVER") { std::string text; if (message.arguments.size() >= 2) text = message.arguments[1]; this->xmpp->send_stanza_error("iq", to_jid, std::to_string(iid), iq_id, "wait", "service-unavailable", text, false); return true; } else if (message.command == "322" || message.command == "RPL_LIST") { // Add element to list if (message.arguments.size() == 4) list.emplace_back(message.arguments[1], message.arguments[2], message.arguments[3]); return false; } else if (message.command == "323" || message.command == "RPL_LISTEND") { // Send the iq response with the content of the list this->xmpp->send_iq_room_list_result(iq_id, to_jid, std::to_string(iid), list); return true; } return false; }; this->add_waiting_irc(std::move(cb)); } void Bridge::send_irc_kick(const Iid& iid, const std::string& target, const std::string& reason, const std::string& iq_id, const std::string& to_jid) { IrcClient* irc = this->get_irc_client(iid.get_server()); irc->send_kick_command(iid.get_local(), target, reason); irc_responder_callback_t cb = [this, target, iq_id, to_jid, iid](const std::string& irc_hostname, const IrcMessage& message) -> bool { if (irc_hostname != iid.get_server()) return false; if (message.command == "KICK" && message.arguments.size() >= 2) { const std::string target_later = message.arguments[1]; const std::string chan_name_later = utils::tolower(message.arguments[0]); if (target_later != target || chan_name_later != iid.get_local()) return false; this->xmpp->send_iq_result(iq_id, to_jid, std::to_string(iid)); } else if (message.command == "401" && message.arguments.size() >= 2) { const std::string target_later = message.arguments[1]; if (target_later != target) return false; std::string error_message = "No such nick"; if (message.arguments.size() >= 3) error_message = message.arguments[2]; this->xmpp->send_stanza_error("iq", to_jid, std::to_string(iid), iq_id, "cancel", "item-not-found", error_message, false); } else if (message.command == "482" && message.arguments.size() >= 2) { const std::string chan_name_later = utils::tolower(message.arguments[1]); if (chan_name_later != iid.get_local()) return false; std::string error_message = "You're not channel operator"; if (message.arguments.size() >= 3) error_message = message.arguments[2]; this->xmpp->send_stanza_error("iq", to_jid, std::to_string(iid), iq_id, "cancel", "not-allowed", error_message, false); } return true; }; this->add_waiting_irc(std::move(cb)); } void Bridge::set_channel_topic(const Iid& iid, const std::string& subject) { IrcClient* irc = this->get_irc_client(iid.get_server()); irc->send_topic_command(iid.get_local(), subject); } void Bridge::send_xmpp_version_to_irc(const Iid& iid, const std::string& name, const std::string& version, const std::string& os) { std::string result(name + " " + version + " " + os); this->send_private_message(iid, "\01VERSION "s + result + "\01", "NOTICE"); } void Bridge::send_irc_ping_result(const Iid& iid, const std::string& id) { this->send_private_message(iid, "\01PING "s + utils::revstr(id) + "\01", "NOTICE"); } void Bridge::send_irc_user_ping_request(const std::string& irc_hostname, const std::string& nick, const std::string& iq_id, const std::string& to_jid, const std::string& from_jid) { Iid iid(nick + "!" + irc_hostname); this->send_private_message(iid, "\01PING " + iq_id + "\01"); irc_responder_callback_t cb = [this, nick=utils::tolower(nick), iq_id, to_jid, irc_hostname, from_jid](const std::string& hostname, const IrcMessage& message) -> bool { if (irc_hostname != hostname || message.arguments.size() < 2) return false; IrcUser user(message.prefix); const std::string body = message.arguments[1]; if (message.command == "NOTICE" && utils::tolower(user.nick) == nick && body.substr(0, 6) == "\01PING ") { const std::string id = body.substr(6, body.size() - 7); if (id != iq_id) return false; Jid jid(from_jid); this->xmpp->send_iq_result(iq_id, to_jid, jid.local); return true; } if (message.command == "401" && message.arguments[1] == nick) { std::string error_message = "No such nick"; if (message.arguments.size() >= 3) error_message = message.arguments[2]; this->xmpp->send_stanza_error("iq", to_jid, from_jid, iq_id, "cancel", "service-unavailable", error_message, true); return true; } return false; }; this->add_waiting_irc(std::move(cb)); } void Bridge::send_irc_participant_ping_request(const Iid& iid, const std::string& nick, const std::string& iq_id, const std::string& to_jid, const std::string& from_jid) { IrcClient* irc = this->get_irc_client(iid.get_server()); IrcChannel* chan = irc->get_channel(iid.get_local()); if (!chan->joined) { this->xmpp->send_stanza_error("iq", to_jid, from_jid, iq_id, "cancel", "not-allowed", "", true); return; } if (chan->get_self()->nick != nick && !chan->find_user(nick)) { this->xmpp->send_stanza_error("iq", to_jid, from_jid, iq_id, "cancel", "item-not-found", "Recipient not in room", true); return; } // The user is in the room, send it a direct PING this->send_irc_user_ping_request(iid.get_server(), nick, iq_id, to_jid, from_jid); } void Bridge::on_gateway_ping(const std::string& irc_hostname, const std::string& iq_id, const std::string& to_jid, const std::string& from_jid) { Jid jid(from_jid); if (irc_hostname.empty() || this->find_irc_client(irc_hostname)) this->xmpp->send_iq_result(iq_id, to_jid, jid.local); else this->xmpp->send_stanza_error("iq", to_jid, from_jid, iq_id, "cancel", "service-unavailable", "", true); } void Bridge::send_irc_version_request(const std::string& irc_hostname, const std::string& target, const std::string& iq_id, const std::string& to_jid, const std::string& from_jid) { Iid iid(target + "!" + irc_hostname); this->send_private_message(iid, "\01VERSION\01"); // TODO, add a timer to remove that waiting iq if the server does not // respond with a matching command before n seconds irc_responder_callback_t cb = [this, target, iq_id, to_jid, irc_hostname, from_jid](const std::string& hostname, const IrcMessage& message) -> bool { if (irc_hostname != hostname) return false; IrcUser user(message.prefix); if (message.command == "NOTICE" && user.nick == target && message.arguments.size() >= 2 && message.arguments[1].substr(0, 9) == "\01VERSION ") { // remove the "\01VERSION " and the "\01" parts from the string const std::string version = message.arguments[1].substr(9, message.arguments[1].size() - 10); this->xmpp->send_version(iq_id, to_jid, from_jid, version); return true; } if (message.command == "401" && message.arguments.size() >= 2 && message.arguments[1] == target) { std::string error_message = "No such nick"; if (message.arguments.size() >= 3) error_message = message.arguments[2]; this->xmpp->send_stanza_error("iq", to_jid, from_jid, iq_id, "cancel", "item-not-found", error_message, true); return true; } return false; }; this->add_waiting_irc(std::move(cb)); } void Bridge::send_message(const Iid& iid, const std::string& nick, const std::string& body, const bool muc) { if (muc) this->xmpp->send_muc_message(std::to_string(iid), nick, this->make_xmpp_body(body), this->user_jid); else { std::string target = std::to_string(iid); bool fulljid = false; auto it = this->preferred_user_from.find(iid.get_local()); if (it != this->preferred_user_from.end()) { target = it->second; fulljid = true; } this->xmpp->send_message(target, this->make_xmpp_body(body), this->user_jid, "chat", fulljid); } } void Bridge::send_presence_error(const Iid& iid, const std::string& nick, const std::string& type, const std::string& condition, const std::string& error_code, const std::string& text) { this->xmpp->send_presence_error(std::to_string(iid), nick, this->user_jid, type, condition, error_code, text); } void Bridge::send_muc_leave(Iid&& iid, std::string&& nick, const std::string& message, const bool self) { this->xmpp->send_muc_leave(std::to_string(iid), std::move(nick), this->make_xmpp_body(message), this->user_jid, self); IrcClient* irc = this->find_irc_client(iid.get_server()); if (irc && irc->number_of_joined_channels() == 0) irc->send_quit_command(""); } void Bridge::send_nick_change(Iid&& iid, const std::string& old_nick, const std::string& new_nick, const char user_mode, const bool self) { std::string affiliation; std::string role; std::tie(role, affiliation) = get_role_affiliation_from_irc_mode(user_mode); this->xmpp->send_nick_change(std::to_string(iid), old_nick, new_nick, affiliation, role, this->user_jid, self); } void Bridge::send_xmpp_message(const std::string& from, const std::string& author, const std::string& msg) { std::string body; if (!author.empty()) { IrcUser user(author); body = "\u000303"s + user.nick + (user.host.empty()? "\u0003: ": (" (\u000310" + user.host + "\u000303)\u0003: ")) + msg; } else body = msg; this->xmpp->send_message(from, this->make_xmpp_body(body), this->user_jid, "chat"); } void Bridge::send_user_join(const std::string& hostname, const std::string& chan_name, const IrcUser* user, const char user_mode, const bool self) { std::string affiliation; std::string role; std::tie(role, affiliation) = get_role_affiliation_from_irc_mode(user_mode); this->xmpp->send_user_join(chan_name + utils::empty_if_fixed_server("%" + hostname), user->nick, user->host, affiliation, role, this->user_jid, self); } void Bridge::send_topic(const std::string& hostname, const std::string& chan_name, const std::string& topic) { this->xmpp->send_topic(chan_name + utils::empty_if_fixed_server("%" + hostname), this->make_xmpp_body(topic), this->user_jid); } std::string Bridge::get_own_nick(const Iid& iid) { IrcClient* irc = this->find_irc_client(iid.get_server()); if (irc) return irc->get_own_nick(); return ""; } size_t Bridge::active_clients() const { return this->irc_clients.size(); } void Bridge::kick_muc_user(Iid&& iid, const std::string& target, const std::string& reason, const std::string& author) { this->xmpp->kick_user(std::to_string(iid), target, reason, author, this->user_jid); } void Bridge::send_nickname_conflict_error(const Iid& iid, const std::string& nickname) { this->xmpp->send_presence_error(std::to_string(iid), nickname, this->user_jid, "cancel", "conflict", "409", ""); } void Bridge::send_affiliation_role_change(const Iid& iid, const std::string& target, const char mode) { std::string role; std::string affiliation; std::tie(role, affiliation) = get_role_affiliation_from_irc_mode(mode); this->xmpp->send_affiliation_role_change(std::to_string(iid), target, affiliation, role, this->user_jid); } void Bridge::send_iq_version_request(const std::string& nick, const std::string& hostname) { this->xmpp->send_iq_version_request(nick + "!" + utils::empty_if_fixed_server(hostname), this->user_jid); } void Bridge::send_xmpp_ping_request(const std::string& nick, const std::string& hostname, const std::string& id) { // Use revstr because the forwarded ping to target XMPP user must not be // the same that the request iq, but we also need to get it back easily // (revstr again) this->xmpp->send_ping_request(nick + "!" + utils::empty_if_fixed_server(hostname), this->user_jid, utils::revstr(id)); } void Bridge::set_preferred_from_jid(const std::string& nick, const std::string& full_jid) { auto it = this->preferred_user_from.find(nick); if (it == this->preferred_user_from.end()) this->preferred_user_from.emplace(nick, full_jid); else this->preferred_user_from[nick] = full_jid; } void Bridge::remove_preferred_from_jid(const std::string& nick) { auto it = this->preferred_user_from.find(nick); if (it != this->preferred_user_from.end()) this->preferred_user_from.erase(it); } void Bridge::add_waiting_irc(irc_responder_callback_t&& callback) { this->waiting_irc.emplace_back(std::move(callback)); } void Bridge::trigger_on_irc_message(const std::string& irc_hostname, const IrcMessage& message) { auto it = this->waiting_irc.begin(); while (it != this->waiting_irc.end()) { if ((*it)(irc_hostname, message) == true) it = this->waiting_irc.erase(it); else ++it; } }