[prosody.git] / plugins / mod_admin_telnet.lua

-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
-- 
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

module:set_global();

local _G = _G;

local prosody = _G.prosody;
local hosts = prosody.hosts;

local console_listener = { default_port = 5582; default_mode = "*a"; interface = "127.0.0.1" };

local hostmanager = require "core.hostmanager";
local modulemanager = require "core.modulemanager";
local s2smanager = require "core.s2smanager";
local portmanager = require "core.portmanager";

local iterators = require "util.iterators";
local keys, values = iterators.keys, iterators.values;
local jid = require "util.jid";
local jid_bare, jid_split = jid.bare, jid.split;
local set, array = require "util.set", require "util.array";
local cert_verify_identity = require "util.x509".verify_identity;
local envload = require "util.envload".envload;
local envloadfile = require "util.envload".envloadfile;

local commands = module:shared("commands")
local def_env = module:shared("env");
local default_env_mt = { __index = def_env };
local core_post_stanza = prosody.core_post_stanza;

local function redirect_output(_G, session)
        local env = setmetatable({ print = session.print }, { __index = function (t, k) return rawget(_G, k); end });
        env.dofile = function(name)
                local f, err = envloadfile(name, env);
                if not f then return f, err; end
                return f();
        end;
        return env;
end

console = {};

function console:new_session(conn)
        local w = function(s) conn:write(s:gsub("\n", "\r\n")); end;
        local session = { conn = conn;
                        send = function (t) w(tostring(t)); end;
                        print = function (...)
                                local t = {};
                                for i=1,select("#", ...) do
                                        t[i] = tostring(select(i, ...));
                                end
                                w("| "..table.concat(t, "\t").."\n");
                        end;
                        disconnect = function () conn:close(); end;
                        };
        session.env = setmetatable({}, default_env_mt);
        
        -- Load up environment with helper objects
        for name, t in pairs(def_env) do
                if type(t) == "table" then
                        session.env[name] = setmetatable({ session = session }, { __index = t });
                end
        end
        
        return session;
end

local sessions = {};

function console_listener.onconnect(conn)
        -- Handle new connection
        local session = console:new_session(conn);
        sessions[conn] = session;
        printbanner(session);
        session.send(string.char(0));
end

function console_listener.onincoming(conn, data)
        local session = sessions[conn];

        local partial = session.partial_data;
        if partial then
                data = partial..data;
        end

        for line in data:gmatch("[^\n]*[\n\004]") do
                -- Handle data (loop allows us to break to add \0 after response)
                repeat
                        local useglobalenv;

                        if line:match("^>") then
                                line = line:gsub("^>", "");
                                useglobalenv = true;
                        elseif line == "\004" then
                                commands["bye"](session, line);
                                break;
                        else
                                local command = line:match("^%w+") or line:match("%p");
                                if commands[command] then
                                        commands[command](session, line);
                                        break;
                                end
                        end

                        session.env._ = line;
                        
                        local chunkname = "=console";
                        local env = (useglobalenv and redirect_output(_G, session)) or session.env or nil
                        local chunk, err = envload("return "..line, chunkname, env);
                        if not chunk then
                                chunk, err = envload(line, chunkname, env);
                                if not chunk then
                                        err = err:gsub("^%[string .-%]:%d+: ", "");
                                        err = err:gsub("^:%d+: ", "");
                                        err = err:gsub("'<eof>'", "the end of the line");
                                        session.print("Sorry, I couldn't understand that... "..err);
                                        break;
                                end
                        end
                
                        local ranok, taskok, message = pcall(chunk);
                        
                        if not (ranok or message or useglobalenv) and commands[line:lower()] then
                                commands[line:lower()](session, line);
                                break;
                        end
                        
                        if not ranok then
                                session.print("Fatal error while running command, it did not complete");
                                session.print("Error: "..taskok);
                                break;
                        end
                        
                        if not message then
                                session.print("Result: "..tostring(taskok));
                                break;
                        elseif (not taskok) and message then
                                session.print("Command completed with a problem");
                                session.print("Message: "..tostring(message));
                                break;
                        end
                        
                        session.print("OK: "..tostring(message));
                until true
                
                session.send(string.char(0));
        end
        session.partial_data = data:match("[^\n]+$");
end

function console_listener.ondisconnect(conn, err)
        local session = sessions[conn];
        if session then
                session.disconnect();
                sessions[conn] = nil;
        end
end

-- Console commands --
-- These are simple commands, not valid standalone in Lua

function commands.bye(session)
        session.print("See you! :)");
        session.disconnect();
end
commands.quit, commands.exit = commands.bye, commands.bye;

commands["!"] = function (session, data)
        if data:match("^!!") and session.env._ then
                session.print("!> "..session.env._);
                return console_listener.onincoming(session.conn, session.env._);
        end
        local old, new = data:match("^!(.-[^\\])!(.-)!$");
        if old and new then
                local ok, res = pcall(string.gsub, session.env._, old, new);
                if not ok then
                        session.print(res)
                        return;
                end
                session.print("!> "..res);
                return console_listener.onincoming(session.conn, res);
        end
        session.print("Sorry, not sure what you want");
end


function commands.help(session, data)
        local print = session.print;
        local section = data:match("^help (%w+)");
        if not section then
                print [[Commands are divided into multiple sections. For help on a particular section, ]]
                print [[type: help SECTION (for example, 'help c2s'). Sections are: ]]
                print [[]]
                print [[c2s - Commands to manage local client-to-server sessions]]
                print [[s2s - Commands to manage sessions between this server and others]]
                print [[module - Commands to load/reload/unload modules/plugins]]
                print [[host - Commands to activate, deactivate and list virtual hosts]]
                print [[user - Commands to create and delete users, and change their passwords]]
                print [[server - Uptime, version, shutting down, etc.]]
                print [[config - Reloading the configuration, etc.]]
                print [[console - Help regarding the console itself]]
        elseif section == "c2s" then
                print [[c2s:show(jid) - Show all client sessions with the specified JID (or all if no JID given)]]
                print [[c2s:show_insecure() - Show all unencrypted client connections]]
                print [[c2s:show_secure() - Show all encrypted client connections]]
                print [[c2s:close(jid) - Close all sessions for the specified JID]]
        elseif section == "s2s" then
                print [[s2s:show(domain) - Show all s2s connections for the given domain (or all if no domain given)]]
                print [[s2s:close(from, to) - Close a connection from one domain to another]]
                print [[s2s:closeall(host) - Close all the incoming/outgoing s2s sessions to specified host]]
        elseif section == "module" then
                print [[module:load(module, host) - Load the specified module on the specified host (or all hosts if none given)]]
                print [[module:reload(module, host) - The same, but unloads and loads the module (saving state if the module supports it)]]
                print [[module:unload(module, host) - The same, but just unloads the module from memory]]
                print [[module:list(host) - List the modules loaded on the specified host]]
        elseif section == "host" then
                print [[host:activate(hostname) - Activates the specified host]]
                print [[host:deactivate(hostname) - Disconnects all clients on this host and deactivates]]
                print [[host:list() - List the currently-activated hosts]]
        elseif section == "user" then
                print [[user:create(jid, password) - Create the specified user account]]
                print [[user:password(jid, password) - Set the password for the specified user account]]
                print [[user:delete(jid, password) - Permanently remove the specified user account]]
        elseif section == "server" then
                print [[server:version() - Show the server's version number]]
                print [[server:uptime() - Show how long the server has been running]]
                print [[server:shutdown(reason) - Shut down the server, with an optional reason to be broadcast to all connections]]
        elseif section == "config" then
                print [[config:reload() - Reload the server configuration. Modules may need to be reloaded for changes to take effect.]]
        elseif section == "console" then
                print [[Hey! Welcome to Prosody's admin console.]]
                print [[First thing, if you're ever wondering how to get out, simply type 'quit'.]]
                print [[Secondly, note that we don't support the full telnet protocol yet (it's coming)]]
                print [[so you may have trouble using the arrow keys, etc. depending on your system.]]
                print [[]]
                print [[For now we offer a couple of handy shortcuts:]]
                print [[!! - Repeat the last command]]
                print [[!old!new! - repeat the last command, but with 'old' replaced by 'new']]
                print [[]]
                print [[For those well-versed in Prosody's internals, or taking instruction from those who are,]]
                print [[you can prefix a command with > to escape the console sandbox, and access everything in]]
                print [[the running server. Great fun, but be careful not to break anything :)]]
        end
        print [[]]
end

-- Session environment --
-- Anything in def_env will be accessible within the session as a global variable

def_env.server = {};

function def_env.server:insane_reload()
        prosody.unlock_globals();
        dofile "prosody"
        prosody = _G.prosody;
        return true, "Server reloaded";
end

function def_env.server:version()
        return true, tostring(prosody.version or "unknown");
end

function def_env.server:uptime()
        local t = os.time()-prosody.start_time;
        local seconds = t%60;
        t = (t - seconds)/60;
        local minutes = t%60;
        t = (t - minutes)/60;
        local hours = t%24;
        t = (t - hours)/24;
        local days = t;
        return true, string.format("This server has been running for %d day%s, %d hour%s and %d minute%s (since %s)",
                days, (days ~= 1 and "s") or "", hours, (hours ~= 1 and "s") or "",
                minutes, (minutes ~= 1 and "s") or "", os.date("%c", prosody.start_time));
end

function def_env.server:shutdown(reason)
        prosody.shutdown(reason);
        return true, "Shutdown initiated";
end

def_env.module = {};

local function get_hosts_set(hosts, module)
        if type(hosts) == "table" then
                if hosts[1] then
                        return set.new(hosts);
                elseif hosts._items then
                        return hosts;
                end
        elseif type(hosts) == "string" then
                return set.new { hosts };
        elseif hosts == nil then
                local mm = require "modulemanager";
                local hosts_set = set.new(array.collect(keys(prosody.hosts)))
                        / function (host) return (prosody.hosts[host].type == "local" or module and mm.is_loaded(host, module)) and host or nil; end;
                if module and mm.get_module("*", module) then
                        hosts_set:add("*");
                end
                return hosts_set;
        end
end

function def_env.module:load(name, hosts, config)
        local mm = require "modulemanager";
        
        hosts = get_hosts_set(hosts);
        
        -- Load the module for each host
        local ok, err, count, mod = true, nil, 0, nil;
        for host in hosts do
                if (not mm.is_loaded(host, name)) then
                        mod, err = mm.load(host, name, config);
                        if not mod then
                                ok = false;
                                if err == "global-module-already-loaded" then
                                        if count > 0 then
                                                ok, err, count = true, nil, 1;
                                        end
                                        break;
                                end
                                self.session.print(err or "Unknown error loading module");
                        else
                                count = count + 1;
                                self.session.print("Loaded for "..mod.module.host);
                        end
                end
        end
        
        return ok, (ok and "Module loaded onto "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));       
end

function def_env.module:unload(name, hosts)
        local mm = require "modulemanager";

        hosts = get_hosts_set(hosts, name);
        
        -- Unload the module for each host
        local ok, err, count = true, nil, 0;
        for host in hosts do
                if mm.is_loaded(host, name) then
                        ok, err = mm.unload(host, name);
                        if not ok then
                                ok = false;
                                self.session.print(err or "Unknown error unloading module");
                        else
                                count = count + 1;
                                self.session.print("Unloaded from "..host);
                        end
                end
        end
        return ok, (ok and "Module unloaded from "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));
end

function def_env.module:reload(name, hosts)
        local mm = require "modulemanager";

        hosts = array.collect(get_hosts_set(hosts, name)):sort(function (a, b)
                if a == "*" then return true
                elseif b == "*" then return false
                else return a < b; end
        end);

        -- Reload the module for each host
        local ok, err, count = true, nil, 0;
        for _, host in ipairs(hosts) do
                if mm.is_loaded(host, name) then
                        ok, err = mm.reload(host, name);
                        if not ok then
                                ok = false;
                                self.session.print(err or "Unknown error reloading module");
                        else
                                count = count + 1;
                                if ok == nil then
                                        ok = true;
                                end
                                self.session.print("Reloaded on "..host);
                        end
                end
        end
        return ok, (ok and "Module reloaded on "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));
end

function def_env.module:list(hosts)
        if hosts == nil then
                hosts = array.collect(keys(prosody.hosts));
                table.insert(hosts, 1, "*");
        end
        if type(hosts) == "string" then
                hosts = { hosts };
        end
        if type(hosts) ~= "table" then
                return false, "Please supply a host or a list of hosts you would like to see";
        end
        
        local print = self.session.print;
        for _, host in ipairs(hosts) do
                print((host == "*" and "Global" or host)..":");
                local modules = array.collect(keys(modulemanager.get_modules(host) or {})):sort();
                if #modules == 0 then
                        if prosody.hosts[host] then
                                print("    No modules loaded");
                        else
                                print("    Host not found");
                        end
                else
                        for _, name in ipairs(modules) do
                                print("    "..name);
                        end
                end
        end
end

def_env.config = {};
function def_env.config:load(filename, format)
        local config_load = require "core.configmanager".load;
        local ok, err = config_load(filename, format);
        if not ok then
                return false, err or "Unknown error loading config";
        end
        return true, "Config loaded";
end

function def_env.config:get(host, section, key)
        local config_get = require "core.configmanager".get
        return true, tostring(config_get(host, section, key));
end

function def_env.config:reload()
        local ok, err = prosody.reload_config();
        return ok, (ok and "Config reloaded (you may need to reload modules to take effect)") or tostring(err);
end

def_env.hosts = {};
function def_env.hosts:list()
        for host, host_session in pairs(hosts) do
                self.session.print(host);
        end
        return true, "Done";
end

function def_env.hosts:add(name)
end

def_env.c2s = {};

local function show_c2s(callback)
        for hostname, host in pairs(hosts) do
                for username, user in pairs(host.sessions or {}) do
                        for resource, session in pairs(user.sessions or {}) do
                                local jid = username.."@"..hostname.."/"..resource;
                                callback(jid, session);
                        end
                end
        end
end

function def_env.c2s:count(match_jid)
        local count = 0;
        show_c2s(function (jid, session)
                if (not match_jid) or jid:match(match_jid) then
                        count = count + 1;
                end             
        end);
        return true, "Total: "..count.." clients";
end

function def_env.c2s:show(match_jid)
        local print, count = self.session.print, 0;
        local curr_host;
        show_c2s(function (jid, session)
                if curr_host ~= session.host then
                        curr_host = session.host;
                        print(curr_host);
                end
                if (not match_jid) or jid:match(match_jid) then
                        count = count + 1;
                        local status, priority = "unavailable", tostring(session.priority or "-");
                        if session.presence then
                                status = session.presence:child_with_name("show");
                                if status then
                                        status = status:get_text() or "[invalid!]";
                                else
                                        status = "available";
                                end
                        end
                        print("   "..jid.." - "..status.."("..priority..")");
                end             
        end);
        return true, "Total: "..count.." clients";
end

function def_env.c2s:show_insecure(match_jid)
        local print, count = self.session.print, 0;
        show_c2s(function (jid, session)
                if ((not match_jid) or jid:match(match_jid)) and not session.secure then
                        count = count + 1;
                        print(jid);
                end             
        end);
        return true, "Total: "..count.." insecure client connections";
end

function def_env.c2s:show_secure(match_jid)
        local print, count = self.session.print, 0;
        show_c2s(function (jid, session)
                if ((not match_jid) or jid:match(match_jid)) and session.secure then
                        count = count + 1;
                        print(jid);
                end             
        end);
        return true, "Total: "..count.." secure client connections";
end

function def_env.c2s:close(match_jid)
        local count = 0;
        show_c2s(function (jid, session)
                if jid == match_jid or jid_bare(jid) == match_jid then
                        count = count + 1;
                        session:close();
                end
        end);
        return true, "Total: "..count.." sessions closed";
end

local function session_flags(session, line)
        if session.cert_identity_status == "valid" then
                line[#line+1] = "(secure)";
        elseif session.secure then
                line[#line+1] = "(encrypted)";
        end
        if session.compressed then
                line[#line+1] = "(compressed)";
        end
        if session.smacks then
                line[#line+1] = "(sm)";
        end
        if session.conn and session.conn:ip():match(":") then
                line[#line+1] = "(IPv6)";
        end
        return table.concat(line, " ");
end

def_env.s2s = {};
function def_env.s2s:show(match_jid)
        local _print = self.session.print;
        local print = self.session.print;
        
        local count_in, count_out = 0,0;
        
        for host, host_session in pairs(hosts) do
                print = function (...) _print(host); _print(...); print = _print; end
                for remotehost, session in pairs(host_session.s2sout) do
                        if (not match_jid) or remotehost:match(match_jid) or host:match(match_jid) then
                                count_out = count_out + 1;
                                print(session_flags(session, {"   ", host, "->", remotehost}));
                                if session.sendq then
                                        print("        There are "..#session.sendq.." queued outgoing stanzas for this connection");
                                end
                                if session.type == "s2sout_unauthed" then
                                        if session.connecting then
                                                print("        Connection not yet established");
                                                if not session.srv_hosts then
                                                        if not session.conn then
                                                                print("        We do not yet have a DNS answer for this host's SRV records");
                                                        else
                                                                print("        This host has no SRV records, using A record instead");
                                                        end
                                                elseif session.srv_choice then
                                                        print("        We are on SRV record "..session.srv_choice.." of "..#session.srv_hosts);
                                                        local srv_choice = session.srv_hosts[session.srv_choice];
                                                        print("        Using "..(srv_choice.target or ".")..":"..(srv_choice.port or 5269));
                                                end
                                        elseif session.notopen then
                                                print("        The <stream> has not yet been opened");
                                        elseif not session.dialback_key then
                                                print("        Dialback has not been initiated yet");
                                        elseif session.dialback_key then
                                                print("        Dialback has been requested, but no result received");
                                        end
                                end
                        end
                end     
                local subhost_filter = function (h)
                                return (match_jid and h:match(match_jid));
                        end
                for session in pairs(incoming_s2s) do
                        if session.to_host == host and ((not match_jid) or host:match(match_jid)
                                or (session.from_host and session.from_host:match(match_jid))
                                -- Pft! is what I say to list comprehensions
                                or (session.hosts and #array.collect(keys(session.hosts)):filter(subhost_filter)>0)) then
                                count_in = count_in + 1;
                                print(session_flags(session, {"   ", host, "<-", session.from_host or "(unknown)"}));
                                if session.type == "s2sin_unauthed" then
                                                print("        Connection not yet authenticated");
                                end
                                for name in pairs(session.hosts) do
                                        if name ~= session.from_host then
                                                print("        also hosts "..tostring(name));
                                        end
                                end
                        end
                end
                
                print = _print;
        end
        
        for session in pairs(incoming_s2s) do
                if not session.to_host and ((not match_jid) or session.from_host and session.from_host:match(match_jid)) then
                        count_in = count_in + 1;
                        print("Other incoming s2s connections");
                        print("    (unknown) <- "..(session.from_host or "(unknown)"));                 
                end
        end
        
        return true, "Total: "..count_out.." outgoing, "..count_in.." incoming connections";
end

local function print_subject(print, subject)
        for _, entry in ipairs(subject) do
                print(
                        ("    %s: %q"):format(
                                entry.name or entry.oid,
                                entry.value:gsub("[\r\n%z%c]", " ")
                        )
                );
        end
end

-- As much as it pains me to use the 0-based depths that OpenSSL does,
-- I think there's going to be more confusion among operators if we
-- break from that.
local function print_errors(print, errors)
        for depth, t in ipairs(errors) do
                print(
                        ("    %d: %s"):format(
                                depth-1,
                                table.concat(t, "\n|        ")
                        )
                );
        end
end

function def_env.s2s:showcert(domain)
        local ser = require "util.serialization".serialize;
        local print = self.session.print;
        local domain_sessions = set.new(array.collect(keys(incoming_s2s)))
                /function(session) return session.from_host == domain and session or nil; end;
        for local_host in values(prosody.hosts) do
                local s2sout = local_host.s2sout;
                if s2sout and s2sout[domain] then
                        domain_sessions:add(s2sout[domain]);
                end
        end
        local cert_set = {};
        for session in domain_sessions do
                local conn = session.conn;
                conn = conn and conn:socket();
                if not conn.getpeerchain then
                        if conn.dohandshake then
                                error("This version of LuaSec does not support certificate viewing");
                        end
                else
                        local certs = conn:getpeerchain();
                        local cert = certs[1];
                        if cert then
                                local digest = cert:digest("sha1");
                                if not cert_set[digest] then
                                        local chain_valid, chain_errors = conn:getpeerverification();
                                        cert_set[digest] = {
                                                {
                                                  from = session.from_host,
                                                  to = session.to_host,
                                                  direction = session.direction
                                                };
                                                chain_valid = chain_valid;
                                                chain_errors = chain_errors;
                                                certs = certs;
                                        };
                                else
                                        table.insert(cert_set[digest], {
                                                from = session.from_host,
                                                to = session.to_host,
                                                direction = session.direction
                                        });
                                end
                        end
                end
        end
        local domain_certs = array.collect(values(cert_set));
        -- Phew. We now have a array of unique certificates presented by domain.
        local n_certs = #domain_certs;
        
        if n_certs == 0 then
                return "No certificates found for "..domain;
        end
        
        local function _capitalize_and_colon(byte)
                return string.upper(byte)..":";
        end
        local function pretty_fingerprint(hash)
                return hash:gsub("..", _capitalize_and_colon):sub(1, -2);
        end
        
        for cert_info in values(domain_certs) do
                local certs = cert_info.certs;
                local cert = certs[1];
                print("---")
                print("Fingerprint (SHA1): "..pretty_fingerprint(cert:digest("sha1")));
                print("");
                local n_streams = #cert_info;
                print("Currently used on "..n_streams.." stream"..(n_streams==1 and "" or "s")..":");
                for _, stream in ipairs(cert_info) do
                        if stream.direction == "incoming" then
                                print("    "..stream.to.." <- "..stream.from);
                        else
                                print("    "..stream.from.." -> "..stream.to);
                        end
                end
                print("");
                local chain_valid, errors = cert_info.chain_valid, cert_info.chain_errors;
                local valid_identity = cert_verify_identity(domain, "xmpp-server", cert);
                if chain_valid then
                        print("Trusted certificate: Yes");
                else
                        print("Trusted certificate: No");
                        print_errors(print, errors);
                end
                print("");
                print("Issuer: ");
                print_subject(print, cert:issuer());
                print("");
                print("Valid for "..domain..": "..(valid_identity and "Yes" or "No"));
                print("Subject:");
                print_subject(print, cert:subject());
        end
        print("---");
        return ("Showing "..n_certs.." certificate"
                ..(n_certs==1 and "" or "s")
                .." presented by "..domain..".");
end

function def_env.s2s:close(from, to)
        local print, count = self.session.print, 0;
        
        if not (from and to) then
                return false, "Syntax: s2s:close('from', 'to') - Closes all s2s sessions from 'from' to 'to'";
        elseif from == to then
                return false, "Both from and to are the same... you can't do that :)";
        end
        
        if hosts[from] and not hosts[to] then
                -- Is an outgoing connection
                local session = hosts[from].s2sout[to];
                if not session then
                        print("No outgoing connection from "..from.." to "..to)
                else
                        (session.close or s2smanager.destroy_session)(session);
                        count = count + 1;
                        print("Closed outgoing session from "..from.." to "..to);
                end
        elseif hosts[to] and not hosts[from] then
                -- Is an incoming connection
                for session in pairs(incoming_s2s) do
                        if session.to_host == to and session.from_host == from then
                                (session.close or s2smanager.destroy_session)(session);
                                count = count + 1;
                        end
                end
                
                if count == 0 then
                        print("No incoming connections from "..from.." to "..to);
                else
                        print("Closed "..count.." incoming session"..((count == 1 and "") or "s").." from "..from.." to "..to);
                end
        elseif hosts[to] and hosts[from] then
                return false, "Both of the hostnames you specified are local, there are no s2s sessions to close";
        else
                return false, "Neither of the hostnames you specified are being used on this server";
        end
        
        return true, "Closed "..count.." s2s session"..((count == 1 and "") or "s");
end

function def_env.s2s:closeall(host)
        local count = 0;

        if not host or type(host) ~= "string" then return false, "wrong syntax: please use s2s:closeall('hostname.tld')"; end
        if hosts[host] then
                for session in pairs(incoming_s2s) do
                        if session.to_host == host then
                                (session.close or s2smanager.destroy_session)(session);
                                count = count + 1;
                        end
                end
                for _, session in pairs(hosts[host].s2sout) do
                        (session.close or s2smanager.destroy_session)(session);
                        count = count + 1;
                end
        else
                for session in pairs(incoming_s2s) do
                        if session.from_host == host then
                                (session.close or s2smanager.destroy_session)(session);
                                count = count + 1;
                        end
                end
                for _, h in pairs(hosts) do
                        if h.s2sout[host] then
                                (h.s2sout[host].close or s2smanager.destroy_session)(h.s2sout[host]);
                                count = count + 1;
                        end
                end
        end

        if count == 0 then return false, "No sessions to close.";
        else return true, "Closed "..count.." s2s session"..((count == 1 and "") or "s"); end
end

def_env.host = {}; def_env.hosts = def_env.host;

function def_env.host:activate(hostname, config)
        return hostmanager.activate(hostname, config);
end
function def_env.host:deactivate(hostname, reason)
        return hostmanager.deactivate(hostname, reason);
end

function def_env.host:list()
        local print = self.session.print;
        local i = 0;
        for host in values(array.collect(keys(prosody.hosts)):sort()) do
                i = i + 1;
                print(host);
        end
        return true, i.." hosts";
end

def_env.port = {};

function def_env.port:list()
        local print = self.session.print;
        local services = portmanager.get_active_services().data;
        local ordered_services, n_ports = {}, 0;
        for service, interfaces in pairs(services) do
                table.insert(ordered_services, service);
        end
        table.sort(ordered_services);
        for _, service in ipairs(ordered_services) do
                local ports_list = {};
                for interface, ports in pairs(services[service]) do
                        for port in pairs(ports) do
                                table.insert(ports_list, "["..interface.."]:"..port);
                        end
                end
                n_ports = n_ports + #ports_list;
                print(service..": "..table.concat(ports_list, ", "));
        end
        return true, #ordered_services.." services listening on "..n_ports.." ports";
end

function def_env.port:close(close_port, close_interface)
        close_port = assert(tonumber(close_port), "Invalid port number");
        local n_closed = 0;
        local services = portmanager.get_active_services().data;
        for service, interfaces in pairs(services) do
                for interface, ports in pairs(interfaces) do
                        if not close_interface or close_interface == interface then
                                if ports[close_port] then
                                        self.session.print("Closing ["..interface.."]:"..close_port.."...");
                                        local ok, err = portmanager.close(interface, close_port)
                                        if not ok then
                                                self.session.print("Failed to close "..interface.." "..port..": "..err);
                                        else
                                                n_closed = n_closed + 1;
                                        end
                                end
                        end
                end
        end
        return true, "Closed "..n_closed.." ports";
end

def_env.muc = {};

local console_room_mt = {
        __index = function (self, k) return self.room[k]; end;
        __tostring = function (self)
                return "MUC room <"..self.room.jid..">";
        end;
};

function def_env.muc:room(room_jid)
        local room_name, host = jid_split(room_jid);
        if not hosts[host] then
                return nil, "No such host: "..host;
        elseif not hosts[host].modules.muc then
                return nil, "Host '"..host.."' is not a MUC service";
        end
        local room_obj = hosts[host].modules.muc.rooms[room_jid];
        if not room_obj then
                return nil, "No such room: "..room_jid;
        end
        return setmetatable({ room = room_obj }, console_room_mt);
end

local um = require"core.usermanager";

def_env.user = {};
function def_env.user:create(jid, password)
        local username, host = jid_split(jid);
        local ok, err = um.create_user(username, password, host);
        if ok then
                return true, "User created";
        else
                return nil, "Could not create user: "..err;
        end
end

function def_env.user:delete(jid)
        local username, host = jid_split(jid);
        local ok, err = um.delete_user(username, host);
        if ok then
                return true, "User deleted";
        else
                return nil, "Could not delete user: "..err;
        end
end

function def_env.user:passwd(jid, password)
        local username, host = jid_split(jid);
        local ok, err = um.set_password(username, password, host);
        if ok then
                return true, "User created";
        else
                return nil, "Could not change password for user: "..err;
        end
end

def_env.xmpp = {};

local st = require "util.stanza";
function def_env.xmpp:ping(localhost, remotehost)
        if hosts[localhost] then
                core_post_stanza(hosts[localhost],
                        st.iq{ from=localhost, to=remotehost, type="get", id="ping" }
                                :tag("ping", {xmlns="urn:xmpp:ping"}));
                return true, "Sent ping";
        else
                return nil, "No such host";
        end
end

-------------

function printbanner(session)
        local option = module:get_option("console_banner");
        if option == nil or option == "full" or option == "graphic" then
                session.print [[
                   ____                \   /     _       
                    |  _ \ _ __ ___  ___  _-_   __| |_   _ 
                    | |_) | '__/ _ \/ __|/ _ \ / _` | | | |
                    |  __/| | | (_) \__ \ |_| | (_| | |_| |
                    |_|   |_|  \___/|___/\___/ \__,_|\__, |
                    A study in simplicity            |___/ 

]]
        end
        if option == nil or option == "short" or option == "full" then
        session.print("Welcome to the Prosody administration console. For a list of commands, type: help");
        session.print("You may find more help on using this console in our online documentation at ");
        session.print("http://prosody.im/doc/console\n");
        end
        if option and option ~= "short" and option ~= "full" and option ~= "graphic" then
                if type(option) == "string" then
                        session.print(option)
                elseif type(option) == "function" then
                        module:log("warn", "Using functions as value for the console_banner option is no longer supported");
                end
        end
end

module:add_item("net-provider", {
        name = "console";
        listener = console_listener;
        default_port = 5582;
        private = true;
});