local sessions = sessions;
local socket = require "socket";
local format = string.format;
-local t_insert = table.insert;
+local t_insert, t_sort = table.insert, table.sort;
local get_traceback = debug.traceback;
local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber
= tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber;
+local idna_to_ascii = require "util.encodings".idna.to_ascii;
local connlisteners_get = require "net.connlisteners".get;
local wraptlsclient = require "net.server".wraptlsclient;
local modulemanager = require "core.modulemanager";
local log = logger_init("s2smanager");
-local md5_hash = require "util.hashes".md5;
+local sha256_hash = require "util.hashes".sha256;
local dialback_secret = "This is very secret!!! Ha!";
-local srvmap = { ["gmail.com"] = "talk.google.com", ["identi.ca"] = "hampton.controlezvous.ca", ["cdr.se"] = "jabber.cdr.se" };
+local dns = require "net.dns";
module "s2smanager"
+local function compare_srv_priorities(a,b) return a.priority < b.priority or a.weight < b.weight; end
+
function send_to_host(from_host, to_host, data)
if data.name then data = tostring(data); 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" then
- host.log("debug", "trying to send over unauthed s2sout to "..to_host..", authing it now...");
+ if host.type == "s2sout_unauthed" and ((not data.xmlns) or data.xmlns == "jabber:client" or data.xmlns == "jabber:server") then
+ (host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host..", authing it now...");
if not host.notopen and not host.dialback_key then
host.log("debug", "dialback had not been initiated");
initiate_dialback(host);
getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end;
end
open_sessions = open_sessions + 1;
- local w = conn.write;
- session.sends2s = function (t) w(tostring(t)); end
+ local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$"));
+ session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end
return session;
end
function new_outgoing(from_host, to_host)
local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" };
hosts[from_host].s2sout[to_host] = host_session;
- local cl = connlisteners_get("xmppserver");
-
- local conn, handler = socket.tcp()
-
- --FIXME: Below parameters (ports/ip) are incorrect (use SRV)
- to_host = srvmap[to_host] or to_host;
-
- conn:settimeout(0);
- local success, err = conn:connect(to_host, 5269);
- if not success then
- log("warn", "s2s connect() failed: %s", err);
- end
-
- conn = wraptlsclient(cl, conn, to_host, 5269, 0, 1, hosts[from_host].ssl_ctx );
- host_session.conn = conn;
-
- -- Register this outgoing connection so that xmppserver_listener knows about it
- -- otherwise it will assume it is a new incoming connection
- cl.register_outgoing(conn, host_session);
+ local log;
do
local conn_name = "s2sout"..tostring(conn):match("[a-f0-9]*$");
- host_session.log = logger_init(conn_name);
+ log = logger_init(conn_name);
+ host_session.log = log;
end
- local w = conn.write;
- host_session.sends2s = function (t) w(tostring(t)); end
+ attempt_connection(host_session);
- conn.write(format([[<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' from='%s' to='%s' version='1.0'>]], from_host, to_host));
-
return host_session;
end
+
+function attempt_connection(host_session, err)
+ local from_host, to_host = host_session.from_host, host_session.to_host;
+ local conn, handler = socket.tcp()
+
+ local connect_host, connect_port = idna_to_ascii(to_host), 5269;
+
+ if not err then -- This is our first attempt
+ local answer = dns.lookup("_xmpp-server._tcp."..connect_host..".", "SRV");
+
+ 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
+ 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
+ end
+ 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("debug", "Connection failed (%s). Attempt #%d: This time to %s:%d", tostring(err), host_session.srv_choice, connect_host, connect_port);
+ else
+ host_session.log("debug", "Out of connection options, can't connect to %s", tostring(host_session.to_host));
+ -- We're out of options
+ return false;
+ end
+
+ -- Ok, we're going to try to connect
+ conn:settimeout(0);
+ local success, err = conn:connect(connect_host, connect_port);
+ if not success and err ~= "timeout" then
+ log("warn", "s2s connect() failed: %s", err);
+ end
+
+ local cl = connlisteners_get("xmppserver");
+ conn = wraptlsclient(cl, conn, connect_host, connect_port, 0, cl.default_mode or 1, hosts[from_host].ssl_ctx );
+ host_session.conn = conn;
+
+ -- Register this outgoing connection so that xmppserver_listener knows about it
+ -- otherwise it will assume it is a new incoming connection
+ cl.register_outgoing(conn, host_session);
+
+ local w = conn.write;
+ host_session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end
+
+ conn.write(format([[<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' from='%s' to='%s' version='1.0'>]], from_host, to_host));
+ return true;
+end
+
function streamopened(session, attr)
local send = session.sends2s;
session.version = tonumber(attr.version) or 0;
if session.version >= 1.0 and not (attr.to and attr.from) then
- print("to: "..tostring(attr.to).." from: "..tostring(attr.from));
- --error(session.to_host.." failed to specify 'to' or 'from' hostname as per RFC");
+ --print("to: "..tostring(attr.to).." from: "..tostring(attr.from));
log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC");
end
if session.direction == "incoming" then
-- Send a reply stream header
- for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end
+ --for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end
session.to_host = attr.to;
session.from_host = attr.from;
session.streamid = uuid_gen();
- print(session, session.from_host, "incoming s2s stream opened");
+ (session.log or log)("debug", "incoming s2s received <stream:stream>");
send("<?xml version='1.0'?>");
send(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 }):top_tag());
if session.to_host and not hosts[session.to_host] then
-- Attempting to connect to a host we don't serve
- session:disconnect("host-unknown");
+ session:close({ condition = "host-unknown"; text = "This host does not serve "..session.to_host });
return;
end
+ if session.version >= 1.0 then
+ send(st.stanza("stream:features")
+ :tag("dialback", { xmlns='urn:xmpp:features:dialback' }):tag("optional"):up():up());
+ 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
mark_connected(session);
end
end
- --[[
- local features = {};
- modulemanager.fire_event("stream-features-s2s", session, features);
-
- send("<stream:features>");
-
- for _, feature in ipairs(features) do
- send(tostring(feature));
- end
-
- send("</stream:features>");]]
session.notopen = nil;
end
end
function generate_dialback(id, to, from)
- return md5_hash(id..to..from..dialback_secret); -- FIXME: See XEP-185 and XEP-220
+ return sha256_hash(id..to..from..dialback_secret, true);
end
function verify_dialback(id, to, from, key)
hosts[session.from_host].s2sout[session.to_host] = nil;
end
- session.conn = nil;
- session.disconnect = nil;
for k in pairs(session) do
if k ~= "trace" then
session[k] = nil;
projects / prosody.git / blobdiff