diff options
Diffstat (limited to 'plugins/s2s')
| -rw-r--r-- | plugins/s2s/mod_s2s.lua | 486 | ||||
| -rw-r--r-- | plugins/s2s/s2sout.lib.lua | 352 |
2 files changed, 0 insertions, 838 deletions
diff --git a/plugins/s2s/mod_s2s.lua b/plugins/s2s/mod_s2s.lua deleted file mode 100644 index 649cd595..00000000 --- a/plugins/s2s/mod_s2s.lua +++ /dev/null @@ -1,486 +0,0 @@ --- 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 prosody = prosody; -local hosts = prosody.hosts; -local core_process_stanza = core_process_stanza; - -local tostring, type = tostring, type; -local t_insert = table.insert; -local xpcall, traceback = xpcall, debug.traceback; - -local add_task = require "util.timer".add_task; -local st = require "util.stanza"; -local initialize_filters = require "util.filters".initialize; -local nameprep = require "util.encodings".stringprep.nameprep; -local new_xmpp_stream = require "util.xmppstream".new; -local s2s_new_incoming = require "core.s2smanager".new_incoming; -local s2s_new_outgoing = require "core.s2smanager".new_outgoing; -local s2s_destroy_session = require "core.s2smanager".destroy_session; -local s2s_mark_connected = require "core.s2smanager".mark_connected; -local uuid_gen = require "util.uuid".generate; -local cert_verify_identity = require "util.x509".verify_identity; - -local s2sout = module:require("s2sout"); - -local connect_timeout = module:get_option_number("s2s_timeout", 60); - -local sessions = module:shared("sessions"); - -local log = module._log; - ---- Handle stanzas to remote domains - -local bouncy_stanzas = { message = true, presence = true, iq = true }; -local function bounce_sendq(session, reason) - local sendq = session.sendq; - if not sendq then return; end - session.log("info", "sending error replies for "..#sendq.." queued stanzas because of failed outgoing connection to "..tostring(session.to_host)); - local dummy = { - type = "s2sin"; - send = function(s) - (session.log or log)("error", "Replying to to an s2s error reply, please report this! Traceback: %s", traceback()); - end; - dummy = true; - }; - for i, data in ipairs(sendq) do - local reply = data[2]; - if reply and not(reply.attr.xmlns) and bouncy_stanzas[reply.name] then - reply.attr.type = "error"; - reply:tag("error", {type = "cancel"}) - :tag("remote-server-not-found", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); - if reason then - reply:tag("text", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}) - :text("Server-to-server connection failed: "..reason):up(); - end - core_process_stanza(dummy, reply); - end - sendq[i] = nil; - end - session.sendq = nil; -end - -module:hook("route/remote", function (event) - local from_host, to_host, stanza = event.from_host, event.to_host, event.stanza; - if not hosts[from_host] then - log("warn", "Attempt to send stanza from %s - a host we don't serve", from_host); - return false; - end - local host = hosts[from_host].s2sout[to_host]; - if host then - -- We have a connection to this host already - if host.type == "s2sout_unauthed" and (stanza.name ~= "db:verify" or not host.dialback_key) then - (host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host); - - -- Queue stanza until we are able to send it - if host.sendq then t_insert(host.sendq, {tostring(stanza), stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza)}); - else host.sendq = { {tostring(stanza), stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza)} }; end - host.log("debug", "stanza [%s] queued ", stanza.name); - return true; - elseif host.type == "local" or host.type == "component" then - log("error", "Trying to send a stanza to ourselves??") - log("error", "Traceback: %s", traceback()); - log("error", "Stanza: %s", tostring(stanza)); - return false; - else - (host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host); - -- FIXME - if host.from_host ~= from_host then - log("error", "WARNING! This might, possibly, be a bug, but it might not..."); - log("error", "We are going to send from %s instead of %s", tostring(host.from_host), tostring(from_host)); - end - host.sends2s(stanza); - host.log("debug", "stanza sent over "..host.type); - return true; - end - end -end, 200); - -module:hook("route/remote", function (event) - local from_host, to_host, stanza = event.from_host, event.to_host, event.stanza; - log("debug", "opening a new outgoing connection for this stanza"); - local host_session = s2s_new_outgoing(from_host, to_host); - - -- Store in buffer - host_session.bounce_sendq = bounce_sendq; - host_session.sendq = { {tostring(stanza), stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza)} }; - log("debug", "stanza [%s] queued until connection complete", tostring(stanza.name)); - s2sout.initiate_connection(host_session); - if (not host_session.connecting) and (not host_session.conn) then - log("warn", "Connection to %s failed already, destroying session...", to_host); - s2s_destroy_session(host_session, "Connection failed"); - return false; - end - return true; -end, 100); - ---- Helper to check that a session peer's certificate is valid -local function check_cert_status(session) - local conn = session.conn:socket() - local cert - if conn.getpeercertificate then - cert = conn:getpeercertificate() - end - - if cert then - local chain_valid, errors = conn:getpeerverification() - -- Is there any interest in printing out all/the number of errors here? - if not chain_valid then - (session.log or log)("debug", "certificate chain validation result: invalid"); - for depth, t in ipairs(errors) do - (session.log or log)("debug", "certificate error(s) at depth %d: %s", depth-1, table.concat(t, ", ")) - end - session.cert_chain_status = "invalid"; - else - (session.log or log)("debug", "certificate chain validation result: valid"); - session.cert_chain_status = "valid"; - - local host = session.direction == "incoming" and session.from_host or session.to_host - - -- We'll go ahead and verify the asserted identity if the - -- connecting server specified one. - if host then - if cert_verify_identity(host, "xmpp-server", cert) then - session.cert_identity_status = "valid" - else - session.cert_identity_status = "invalid" - end - end - end - end -end - ---- XMPP stream event handlers - -local stream_callbacks = { default_ns = "jabber:server", handlestanza = core_process_stanza }; - -local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams"; - -function stream_callbacks.streamopened(session, attr) - local send = session.sends2s; - - -- TODO: #29: SASL/TLS on s2s streams - session.version = tonumber(attr.version) or 0; - - -- TODO: Rename session.secure to session.encrypted - if session.secure == false then - session.secure = true; - end - - if session.direction == "incoming" then - -- Send a reply stream header - - -- Validate to/from - local to, from = nameprep(attr.to), nameprep(attr.from); - if not to and attr.to then -- COMPAT: Some servers do not reliably set 'to' (especially on stream restarts) - session:close({ condition = "improper-addressing", text = "Invalid 'to' address" }); - return; - end - if not from and attr.from then -- COMPAT: Some servers do not reliably set 'from' (especially on stream restarts) - session:close({ condition = "improper-addressing", text = "Invalid 'from' address" }); - return; - end - - -- Set session.[from/to]_host if they have not been set already and if - -- this session isn't already authenticated - if session.type == "s2sin_unauthed" and from and not session.from_host then - session.from_host = from; - elseif from ~= session.from_host then - session:close({ condition = "improper-addressing", text = "New stream 'from' attribute does not match original" }); - return; - end - if session.type == "s2sin_unauthed" and to and not session.to_host then - session.to_host = to; - elseif to ~= session.to_host then - session:close({ condition = "improper-addressing", text = "New stream 'to' attribute does not match original" }); - return; - end - - session.streamid = uuid_gen(); - (session.log or log)("debug", "Incoming s2s received %s", st.stanza("stream:stream", attr):top_tag()); - if session.to_host then - if not hosts[session.to_host] then - -- Attempting to connect to a host we don't serve - session:close({ - condition = "host-unknown"; - text = "This host does not serve "..session.to_host - }); - return; - elseif hosts[session.to_host].disallow_s2s then - -- Attempting to connect to a host that disallows s2s - session:close({ - condition = "policy-violation"; - text = "Server-to-server communication is not allowed to this host"; - }); - return; - end - end - - if session.secure and not session.cert_chain_status then check_cert_status(session); end - - send("<?xml version='1.0'?>"); - send(st.stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', - ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host, to=session.from_host, version=(session.version > 0 and "1.0" or nil) }):top_tag()); - if session.version >= 1.0 then - local features = st.stanza("stream:features"); - - if session.to_host then - hosts[session.to_host].events.fire_event("s2s-stream-features", { origin = session, features = features }); - else - (session.log or log)("warn", "No 'to' on stream header from %s means we can't offer any features", session.from_host or "unknown host"); - end - - log("debug", "Sending stream features: %s", tostring(features)); - send(features); - end - elseif session.direction == "outgoing" then - -- If we are just using the connection for verifying dialback keys, we won't try and auth it - if not attr.id then error("stream response did not give us a streamid!!!"); end - session.streamid = attr.id; - - if session.secure and not session.cert_chain_status then check_cert_status(session); end - - -- Send unauthed buffer - -- (stanzas which are fine to send before dialback) - -- Note that this is *not* the stanza queue (which - -- we can only send if auth succeeds) :) - local send_buffer = session.send_buffer; - if send_buffer and #send_buffer > 0 then - log("debug", "Sending s2s send_buffer now..."); - for i, data in ipairs(send_buffer) do - session.sends2s(tostring(data)); - send_buffer[i] = nil; - end - end - session.send_buffer = nil; - - -- If server is pre-1.0, don't wait for features, just do dialback - if session.version < 1.0 then - if not session.dialback_verifying then - hosts[session.from_host].events.fire_event("s2s-authenticate-legacy", { origin = session }); - else - s2s_mark_connected(session); - end - end - end - session.notopen = nil; - session.send = function(stanza) prosody.events.fire_event("route/remote", { from_host = session.to_host, to_host = session.from_host, stanza = stanza}) end; -end - -function stream_callbacks.streamclosed(session) - (session.log or log)("debug", "Received </stream:stream>"); - session:close(); -end - -function stream_callbacks.streamdisconnected(session, err) - if err and err ~= "closed" and session.direction == "outgoing" then - (session.log or log)("debug", "s2s connection attempt failed: %s", err); - if s2sout.attempt_connection(session, err) then - (session.log or log)("debug", "...so we're going to try another target"); - return true; -- Session lives for now - end - end - (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err or "closed")); - s2s_destroy_session(session, err); -end - -function stream_callbacks.error(session, error, data) - if error == "no-stream" then - session:close("invalid-namespace"); - elseif error == "parse-error" then - session.log("debug", "Server-to-server XML parse error: %s", tostring(error)); - session:close("not-well-formed"); - elseif error == "stream-error" then - local condition, text = "undefined-condition"; - for child in data:children() do - if child.attr.xmlns == xmlns_xmpp_streams then - if child.name ~= "text" then - condition = child.name; - else - text = child:get_text(); - end - if condition ~= "undefined-condition" and text then - break; - end - end - end - text = condition .. (text and (" ("..text..")") or ""); - session.log("info", "Session closed by remote with error: %s", text); - session:close(nil, text); - end -end - -local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), traceback()); end -function stream_callbacks.handlestanza(session, stanza) - if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client - stanza.attr.xmlns = nil; - end - stanza = session.filter("stanzas/in", stanza); - if stanza then - return xpcall(function () return core_process_stanza(session, stanza) end, handleerr); - end -end - -local listener = {}; - ---- Session methods -local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; -local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" }; -local function session_close(session, reason, remote_reason) - local log = session.log or log; - if session.conn then - if session.notopen then - session.sends2s("<?xml version='1.0'?>"); - session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag()); - end - if reason then - if type(reason) == "string" then -- assume stream error - log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason); - session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); - elseif type(reason) == "table" then - if reason.condition then - local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); - if reason.text then - stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); - end - if reason.extra then - stanza:add_child(reason.extra); - end - log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza)); - session.sends2s(stanza); - elseif reason.name then -- a stanza - log("info", "Disconnecting %s->%s[%s], <stream:error> is: %s", session.from_host or "(unknown host)", session.to_host or "(unknown host)", session.type, tostring(reason)); - session.sends2s(reason); - end - end - end - session.sends2s("</stream:stream>"); - if session.notopen or not session.conn:close() then - session.conn:close(true); -- Force FIXME: timer? - end - session.conn:close(); - listener.ondisconnect(session.conn, remote_reason or (reason and (reason.text or reason.condition)) or reason or "stream closed"); - end -end - --- Session initialization logic shared by incoming and outgoing -local function initialize_session(session) - local stream = new_xmpp_stream(session, stream_callbacks); - session.stream = stream; - - session.notopen = true; - - function session.reset_stream() - session.notopen = true; - session.stream:reset(); - end - - local filter = session.filter; - function session.data(data) - data = filter("bytes/in", data); - if data then - local ok, err = stream:feed(data); - if ok then return; end - (session.log or log)("warn", "Received invalid XML: %s", data); - (session.log or log)("warn", "Problem was: %s", err); - session:close("not-well-formed"); - end - end - - session.close = session_close; - - local handlestanza = stream_callbacks.handlestanza; - function session.dispatch_stanza(session, stanza) - return handlestanza(session, stanza); - end - - local conn = session.conn; - add_task(connect_timeout, function () - if session.conn ~= conn or session.connecting - or session.type == "s2sin" or session.type == "s2sout" then - return; -- Ok, we're connect[ed|ing] - end - -- Not connected, need to close session and clean up - (session.log or log)("debug", "Destroying incomplete session %s->%s due to inactivity", - session.from_host or "(unknown)", session.to_host or "(unknown)"); - session:close("connection-timeout"); - end); -end - -function listener.onconnect(conn) - if not sessions[conn] then -- May be an existing outgoing session - local session = s2s_new_incoming(conn); - sessions[conn] = session; - session.log("debug", "Incoming s2s connection"); - - local filter = initialize_filters(session); - local w = conn.write; - session.sends2s = function (t) - log("debug", "sending: %s", t.top_tag and t:top_tag() or t:match("^([^>]*>?)")); - if t.name then - t = filter("stanzas/out", t); - end - if t then - t = filter("bytes/out", tostring(t)); - if t then - return w(conn, t); - end - end - end - - initialize_session(session); - end -end - -function listener.onincoming(conn, data) - local session = sessions[conn]; - if session then - session.data(data); - end -end - -function listener.onstatus(conn, status) - if status == "ssl-handshake-complete" then - local session = sessions[conn]; - if session and session.direction == "outgoing" then - session.log("debug", "Sending stream header..."); - session:open_stream(session.from_host, session.to_host); - end - end -end - -function listener.ondisconnect(conn, err) - local session = sessions[conn]; - if session then - if stream_callbacks.streamdisconnected(session, err) then - return; -- Connection lives, for now - end - end - sessions[conn] = nil; -end - -function listener.register_outgoing(conn, session) - session.direction = "outgoing"; - sessions[conn] = session; - initialize_session(session); -end - -s2sout.set_listener(listener); - -module:add_item("net-provider", { - name = "s2s"; - listener = listener; - default_port = 5269; - encryption = "starttls"; - multiplex = { - pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:server%1.*>"; - }; -}); - diff --git a/plugins/s2s/s2sout.lib.lua b/plugins/s2s/s2sout.lib.lua deleted file mode 100644 index f3496597..00000000 --- a/plugins/s2s/s2sout.lib.lua +++ /dev/null @@ -1,352 +0,0 @@ --- 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 containing all the logic for connecting to a remote server - -local portmanager = require "core.portmanager"; -local wrapclient = require "net.server".wrapclient; -local initialize_filters = require "util.filters".initialize; -local idna_to_ascii = require "util.encodings".idna.to_ascii; -local new_ip = require "util.ip".new_ip; -local rfc3484_dest = require "util.rfc3484".destination; -local socket = require "socket"; -local adns = require "net.adns"; -local dns = require "net.dns"; -local t_insert, t_sort, ipairs = table.insert, table.sort, ipairs; -local st = require "util.stanza"; - -local s2s_destroy_session = require "core.s2smanager".destroy_session; - -local log = module._log; - -local sources = {}; - -local max_dns_depth = module:get_option_number("dns_max_depth", 3); - -local s2sout = {}; - -local s2s_listener; - - -function s2sout.set_listener(listener) - s2s_listener = listener; -end - -local function compare_srv_priorities(a,b) - return a.priority < b.priority or (a.priority == b.priority and a.weight > b.weight); -end - -local function session_open_stream(session, from, to) - session.sends2s(st.stanza("stream:stream", { - xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', - ["xmlns:stream"]='http://etherx.jabber.org/streams', - from=from, to=to, version='1.0', ["xml:lang"]='en'}):top_tag()); -end - -function s2sout.initiate_connection(host_session) - initialize_filters(host_session); - host_session.open_stream = session_open_stream; - - -- Kick the connection attempting machine into life - if not s2sout.attempt_connection(host_session) then - -- Intentionally not returning here, the - -- session is needed, connected or not - s2s_destroy_session(host_session); - end - - if not host_session.sends2s then - -- A sends2s which buffers data (until the stream is opened) - -- note that data in this buffer will be sent before the stream is authed - -- and will not be ack'd in any way, successful or otherwise - local buffer; - function host_session.sends2s(data) - if not buffer then - buffer = {}; - host_session.send_buffer = buffer; - end - log("debug", "Buffering data on unconnected s2sout to %s", tostring(host_session.to_host)); - buffer[#buffer+1] = data; - log("debug", "Buffered item %d: %s", #buffer, tostring(data)); - end - end -end - -function s2sout.attempt_connection(host_session, err) - local from_host, to_host = host_session.from_host, host_session.to_host; - local connect_host, connect_port = to_host and idna_to_ascii(to_host), 5269; - - if not connect_host then - return false; - end - - if not err then -- This is our first attempt - log("debug", "First attempt to connect to %s, starting with SRV lookup...", to_host); - host_session.connecting = true; - local handle; - handle = adns.lookup(function (answer) - handle = nil; - host_session.connecting = nil; - if answer then - log("debug", to_host.." has SRV records, handling..."); - local srv_hosts = {}; - host_session.srv_hosts = srv_hosts; - for _, record in ipairs(answer) do - t_insert(srv_hosts, record.srv); - end - if #srv_hosts == 1 and srv_hosts[1].target == "." then - log("debug", to_host.." does not provide a XMPP service"); - s2s_destroy_session(host_session, err); -- Nothing to see here - return; - end - t_sort(srv_hosts, compare_srv_priorities); - - local srv_choice = srv_hosts[1]; - host_session.srv_choice = 1; - if srv_choice then - connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; - log("debug", "Best record found, will connect to %s:%d", connect_host, connect_port); - end - else - log("debug", to_host.." has no SRV records, falling back to A"); - end - -- Try with SRV, or just the plain hostname if no SRV - local ok, err = s2sout.try_connect(host_session, connect_host, connect_port); - if not ok then - if not s2sout.attempt_connection(host_session, err) then - -- No more attempts will be made - s2s_destroy_session(host_session, err); - end - end - end, "_xmpp-server._tcp."..connect_host..".", "SRV"); - - return true; -- Attempt in progress - elseif host_session.ip_hosts then - return s2sout.try_connect(host_session, connect_host, connect_port, err); - elseif host_session.srv_hosts and #host_session.srv_hosts > host_session.srv_choice then -- Not our first attempt, and we also have SRV - host_session.srv_choice = host_session.srv_choice + 1; - local srv_choice = host_session.srv_hosts[host_session.srv_choice]; - connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; - host_session.log("info", "Connection failed (%s). Attempt #%d: This time to %s:%d", tostring(err), host_session.srv_choice, connect_host, connect_port); - else - host_session.log("info", "Out of connection options, can't connect to %s", tostring(host_session.to_host)); - -- We're out of options - return false; - end - - if not (connect_host and connect_port) then - -- Likely we couldn't resolve DNS - log("warn", "Hmm, we're without a host (%s) and port (%s) to connect to for %s, giving up :(", tostring(connect_host), tostring(connect_port), tostring(to_host)); - return false; - end - - return s2sout.try_connect(host_session, connect_host, connect_port); -end - -function s2sout.try_next_ip(host_session) - host_session.connecting = nil; - host_session.ip_choice = host_session.ip_choice + 1; - local ip = host_session.ip_hosts[host_session.ip_choice]; - local ok, err= s2sout.make_connect(host_session, ip.ip, ip.port); - if not ok then - if not s2sout.attempt_connection(host_session, err or "closed") then - err = err and (": "..err) or ""; - s2s_destroy_session(host_session, "Connection failed"..err); - end - end -end - -function s2sout.try_connect(host_session, connect_host, connect_port, err) - host_session.connecting = true; - - if not err then - local IPs = {}; - host_session.ip_hosts = IPs; - local handle4, handle6; - local has_other = false; - - handle4 = adns.lookup(function (reply, err) - handle4 = nil; - - -- COMPAT: This is a compromise for all you CNAME-(ab)users :) - if not (reply and reply[#reply] and reply[#reply].a) then - local count = max_dns_depth; - reply = dns.peek(connect_host, "CNAME", "IN"); - while count > 0 and reply and reply[#reply] and not reply[#reply].a and reply[#reply].cname do - log("debug", "Looking up %s (DNS depth is %d)", tostring(reply[#reply].cname), count); - reply = dns.peek(reply[#reply].cname, "A", "IN") or dns.peek(reply[#reply].cname, "CNAME", "IN"); - count = count - 1; - end - end - -- end of CNAME resolving - - if reply and reply[#reply] and reply[#reply].a then - for _, ip in ipairs(reply) do - log("debug", "DNS reply for %s gives us %s", connect_host, ip.a); - IPs[#IPs+1] = new_ip(ip.a, "IPv4"); - end - end - - if has_other then - if #IPs > 0 then - rfc3484_dest(host_session.ip_hosts, sources); - for i = 1, #IPs do - IPs[i] = {ip = IPs[i], port = connect_port}; - end - host_session.ip_choice = 0; - s2sout.try_next_ip(host_session); - else - log("debug", "DNS lookup failed to get a response for %s", connect_host); - host_session.ip_hosts = nil; - if not s2sout.attempt_connection(host_session, "name resolution failed") then -- Retry if we can - log("debug", "No other records to try for %s - destroying", host_session.to_host); - err = err and (": "..err) or ""; - s2s_destroy_session(host_session, "DNS resolution failed"..err); -- End of the line, we can't - end - end - else - has_other = true; - end - end, connect_host, "A", "IN"); - - handle6 = adns.lookup(function (reply, err) - handle6 = nil; - - if reply and reply[#reply] and reply[#reply].aaaa then - for _, ip in ipairs(reply) do - log("debug", "DNS reply for %s gives us %s", connect_host, ip.aaaa); - IPs[#IPs+1] = new_ip(ip.aaaa, "IPv6"); - end - end - - if has_other then - if #IPs > 0 then - rfc3484_dest(host_session.ip_hosts, sources); - for i = 1, #IPs do - IPs[i] = {ip = IPs[i], port = connect_port}; - end - host_session.ip_choice = 0; - s2sout.try_next_ip(host_session); - else - log("debug", "DNS lookup failed to get a response for %s", connect_host); - host_session.ip_hosts = nil; - if not s2sout.attempt_connection(host_session, "name resolution failed") then -- Retry if we can - log("debug", "No other records to try for %s - destroying", host_session.to_host); - err = err and (": "..err) or ""; - s2s_destroy_session(host_session, "DNS resolution failed"..err); -- End of the line, we can't - end - end - else - has_other = true; - end - end, connect_host, "AAAA", "IN"); - - return true; - elseif host_session.ip_hosts and #host_session.ip_hosts > host_session.ip_choice then -- Not our first attempt, and we also have IPs left to try - s2sout.try_next_ip(host_session); - else - host_session.ip_hosts = nil; - if not s2sout.attempt_connection(host_session, "out of IP addresses") then -- Retry if we can - log("debug", "No other records to try for %s - destroying", host_session.to_host); - err = err and (": "..err) or ""; - s2s_destroy_session(host_session, "Connecting failed"..err); -- End of the line, we can't - return false; - end - end - - return true; -end - -function s2sout.make_connect(host_session, connect_host, connect_port) - (host_session.log or log)("info", "Beginning new connection attempt to %s ([%s]:%d)", host_session.to_host, connect_host.addr, connect_port); - -- Ok, we're going to try to connect - - local from_host, to_host = host_session.from_host, host_session.to_host; - - local conn, handler; - if connect_host.proto == "IPv4" then - conn, handler = socket.tcp(); - else - if not socket.tcp6 then - log("warn", "Could not connect to "..to_host..". Your version of lua-socket does not support IPv6"); - return false, "no-ipv6"; - end - conn, handler = socket.tcp6(); - end - - if not conn then - log("warn", "Failed to create outgoing connection, system error: %s", handler); - return false, handler; - end - - conn:settimeout(0); - local success, err = conn:connect(connect_host.addr, connect_port); - if not success and err ~= "timeout" then - log("warn", "s2s connect() to %s (%s:%d) failed: %s", host_session.to_host, connect_host.addr, connect_port, err); - return false, err; - end - - conn = wrapclient(conn, connect_host.addr, connect_port, s2s_listener, "*a"); - host_session.conn = conn; - - local filter = initialize_filters(host_session); - local w, log = conn.write, host_session.log; - host_session.sends2s = function (t) - log("debug", "sending: %s", (t.top_tag and t:top_tag()) or t:match("^[^>]*>?")); - if t.name then - t = filter("stanzas/out", t); - end - if t then - t = filter("bytes/out", tostring(t)); - if t then - return w(conn, tostring(t)); - end - end - end - - -- Register this outgoing connection so that xmppserver_listener knows about it - -- otherwise it will assume it is a new incoming connection - s2s_listener.register_outgoing(conn, host_session); - - host_session:open_stream(from_host, to_host); - - log("debug", "Connection attempt in progress..."); - return true; -end - -module:hook_global("service-added", function (event) - if event.name ~= "s2s" then return end - - local s2s_sources = portmanager.get_active_services():get("s2s"); - if not s2s_sources then - module:log("warn", "s2s not listening on any ports, outgoing connections may fail"); - return; - end - for source, _ in pairs(s2s_sources) do - if source == "*" or source == "0.0.0.0" then - if not socket.local_addresses then - sources[#sources + 1] = new_ip("0.0.0.0", "IPv4"); - else - for _, addr in ipairs(socket.local_addresses("ipv4", true)) do - sources[#sources + 1] = new_ip(addr, "IPv4"); - end - end - elseif source == "::" then - if not socket.local_addresses then - sources[#sources + 1] = new_ip("::", "IPv6"); - else - for _, addr in ipairs(socket.local_addresses("ipv6", true)) do - sources[#sources + 1] = new_ip(addr, "IPv6"); - end - end - else - sources[#sources + 1] = new_ip(source, (source:find(":") and "IPv6") or "IPv4"); - end - end -end); - -return s2sout; |