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client.lua
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197 lines (167 loc) · 5.36 KB
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local verse = require "verse";
local stream = verse.stream_mt;
local jid_split = require "util.jid".split;
local adns = require "net.adns";
local lxp = require "lxp";
local st = require "util.stanza";
-- Shortcuts to save having to load util.stanza
verse.message, verse.presence, verse.iq, verse.stanza, verse.reply, verse.error_reply =
st.message, st.presence, st.iq, st.stanza, st.reply, st.error_reply;
local new_xmpp_stream = require "util.xmppstream".new;
local xmlns_stream = "http://etherx.jabber.org/streams";
local function compare_srv_priorities(a,b)
return a.priority < b.priority or (a.priority == b.priority and a.weight > b.weight);
end
local stream_callbacks = {
stream_ns = xmlns_stream,
stream_tag = "stream",
default_ns = "jabber:client" };
function stream_callbacks.streamopened(stream, attr)
stream.stream_id = attr.id;
if not stream:event("opened", attr) then
stream.notopen = nil;
end
return true;
end
function stream_callbacks.streamclosed(stream)
return stream:event("closed");
end
function stream_callbacks.handlestanza(stream, stanza)
if stanza.attr.xmlns == xmlns_stream then
return stream:event("stream-"..stanza.name, stanza);
elseif stanza.attr.xmlns then
return stream:event("stream/"..stanza.attr.xmlns, stanza);
end
return stream:event("stanza", stanza);
end
function stream:reset()
if self.stream then
self.stream:reset();
else
self.stream = new_xmpp_stream(self, stream_callbacks);
end
self.notopen = true;
return true;
end
function stream:connect_client(jid, pass)
self.jid, self.password = jid, pass;
self.username, self.host, self.resource = jid_split(jid);
-- Required XMPP features
self:add_plugin("tls");
self:add_plugin("sasl");
self:add_plugin("bind");
self:add_plugin("session");
function self.data(conn, data)
local ok, err = self.stream:feed(data);
if ok then return; end
self:debug("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "));
self:close("xml-not-well-formed");
end
self:hook("connected", function () self:reopen(); end);
self:hook("incoming-raw", function (data) return self.data(self.conn, data); end);
self.curr_id = 0;
self.tracked_iqs = {};
self:hook("stanza", function (stanza)
local id, type = stanza.attr.id, stanza.attr.type;
if id and stanza.name == "iq" and (type == "result" or type == "error") and self.tracked_iqs[id] then
self.tracked_iqs[id](stanza);
self.tracked_iqs[id] = nil;
return true;
end
end);
self:hook("stanza", function (stanza)
if stanza.attr.xmlns == nil or stanza.attr.xmlns == "jabber:client" then
if stanza.name == "iq" and (stanza.attr.type == "get" or stanza.attr.type == "set") then
local xmlns = stanza.tags[1] and stanza.tags[1].attr.xmlns;
if xmlns then
ret = self:event("iq/"..xmlns, stanza);
if not ret then
ret = self:event("iq", stanza);
end
end
if ret == nil then
self:send(verse.error_reply(stanza, "cancel", "service-unavailable"));
return true;
end
else
ret = self:event(stanza.name, stanza);
end
end
return ret;
end, -1);
self:hook("outgoing", function (data)
if data.name then
self:event("stanza-out", data);
end
end);
self:hook("stanza-out", function (stanza)
if not stanza.attr.xmlns then
self:event(stanza.name.."-out", stanza);
end
end);
local function stream_ready()
self:event("ready");
end
self:hook("session-success", stream_ready, -1)
self:hook("bind-success", stream_ready, -1);
local _base_close = self.close;
function self:close(reason)
if not self.notopen then
self:send("</stream:stream>");
end
return _base_close(self);
end
local function start_connect()
-- Initialise connection
self:connect(self.connect_host or self.host, self.connect_port or 5222);
end
if not (self.connect_host or self.connect_port) then
-- Look up SRV records
adns.lookup(function (answer)
if answer then
local srv_hosts = {};
self.srv_hosts = srv_hosts;
for _, record in ipairs(answer) do
table.insert(srv_hosts, record.srv);
end
table.sort(srv_hosts, compare_srv_priorities);
local srv_choice = srv_hosts[1];
self.srv_choice = 1;
if srv_choice then
self.connect_host, self.connect_port = srv_choice.target, srv_choice.port;
self:debug("Best record found, will connect to %s:%d", self.connect_host or self.host, self.connect_port or 5222);
end
self:hook("disconnected", function ()
if self.srv_hosts and self.srv_choice < #self.srv_hosts then
self.srv_choice = self.srv_choice + 1;
local srv_choice = srv_hosts[self.srv_choice];
self.connect_host, self.connect_port = srv_choice.target, srv_choice.port;
start_connect();
return true;
end
end, 1000);
self:hook("connected", function ()
self.srv_hosts = nil;
end, 1000);
end
start_connect();
end, "_xmpp-client._tcp."..(self.host)..".", "SRV");
else
start_connect();
end
end
function stream:reopen()
self:reset();
self:send(st.stanza("stream:stream", { to = self.host, ["xmlns:stream"]='http://etherx.jabber.org/streams',
xmlns = "jabber:client", version = "1.0" }):top_tag());
end
function stream:send_iq(iq, callback)
local id = self:new_id();
self.tracked_iqs[id] = callback;
iq.attr.id = id;
self:send(iq);
end
function stream:new_id()
self.curr_id = self.curr_id + 1;
return tostring(self.curr_id);
end