local st = require "util.stanza";
local watchdog = require "util.watchdog";
local dt = require "util.datetime";
local keepalive_servers = module:get_option_set("keepalive_servers");
local keepalive_interval = module:get_option_number("keepalive_interval", 60);
local keepalive_timeout = module:get_option_number("keepalive_timeout", 593);
local host = module.host;
local s2sout = prosody.hosts[host].s2sout;
local function send_pings()
local ping_hosts = {};
for remote_domain, session in pairs(s2sout) do
if session.type ~= "s2sout_unauthed"
and (not(keepalive_servers) or keepalive_servers:contains(remote_domain)) then
session.sends2s(st.iq({ to = remote_domain, type = "get", from = host, id = "keepalive:"..dt.datetime()})
:tag("ping", { xmlns = "urn:xmpp:ping" })
);
end
end
for session in pairs(prosody.incoming_s2s) do
if session.type ~= "s2sin_unauthed"
and not session.notopen
and session.to_host == host
and (not(keepalive_servers) or keepalive_servers:contains(session.from_host)) then
if not s2sout[session.from_host] then ping_hosts[session.from_host] = true; end
session.sends2s " ";
-- If the connection is dead, this should make it time out.
end
end
-- ping remotes we only have s2sin from
for remote_domain in pairs(ping_hosts) do
module:send(st.iq({ to = remote_domain, type = "get", from = host, id = "keepalive:"..dt.datetime() })
:tag("ping", { xmlns = "urn:xmpp:ping" })
);
end
return keepalive_interval;
end
module:hook("s2sin-established", function (event)
local session = event.session;
if session.watchdog_keepalive then return end -- in case mod_bidi fires this twice
if keepalive_servers and not keepalive_servers:contains(session.from_host) then return end
session.watchdog_keepalive = watchdog.new(keepalive_timeout, function ()
session.log("info", "Keepalive ping timed out, closing connection");
session:close("connection-timeout");
end);
end);
module:hook("s2sout-established", function (event)
local session = event.session;
if session.watchdog_keepalive then return end -- in case mod_bidi fires this twice
if keepalive_servers and not keepalive_servers:contains(session.from_host) then return end
session.watchdog_keepalive = watchdog.new(keepalive_timeout, function ()
session.log("info", "Keepalive ping timed out, closing connection");
session:close("connection-timeout");
end);
end);
module:hook("iq/host", function (event)
local stanza = event.stanza;
if stanza.attr.type ~= "result" and stanza.attr.type ~= "error" then
return -- not a reply iq stanza
end
if not (stanza.attr.id and stanza.attr.id:sub(1, #"keepalive:") == "keepalive:") then
return -- not a reply to this module
end
if stanza.attr.type == "error" then
local err = stanza:get_child("error");
local err_by = err and err.attr.by;
if err_by and prosody.hosts[err_by] then
return -- error produced by the local host
end
end
local origin = event.origin;
if origin.dummy then return end -- Probably a sendq bounce
if origin.watchdog_keepalive then
origin.log("debug", "Resetting keepalive watchdog")
origin.watchdog_keepalive:reset();
end
if s2sout[origin.from_host] and s2sout[origin.from_host].watchdog_keepalive then
s2sout[origin.from_host].watchdog_keepalive:reset();
end
return true;
end);
module:add_timer(keepalive_interval, send_pings);