prosodyctl check: Warn about invalid domain names in the config file
This ensures that domain names of virtual hosts and components are valid in
XMPP, and that they are encoded correctly.
local server = require "net.server";
local log = require "util.logger".init("net.connect");
local new_id = require "util.id".short;
-- TODO #1246 Happy Eyeballs
-- FIXME RFC 6724
-- FIXME Error propagation from resolvers doesn't work
-- FIXME #1428 Reuse DNS resolver object between service and basic resolver
-- FIXME #1429 Close DNS resolver object when done
local pending_connection_methods = {};
local pending_connection_mt = {
__name = "pending_connection";
__index = pending_connection_methods;
__tostring = function (p)
return "<pending connection "..p.id.." to "..tostring(p.target_resolver.hostname)..">";
end;
};
function pending_connection_methods:log(level, message, ...)
log(level, "[pending connection %s] "..message, self.id, ...);
end
-- pending_connections_map[conn] = pending_connection
local pending_connections_map = {};
local pending_connection_listeners = {};
local function attempt_connection(p)
p:log("debug", "Checking for targets...");
if p.conn then
pending_connections_map[p.conn] = nil;
p.conn = nil;
end
p.target_resolver:next(function (conn_type, ip, port, extra)
if not conn_type then
-- No more targets to try
p:log("debug", "No more connection targets to try", p.target_resolver.last_error);
if p.listeners.onfail then
p.listeners.onfail(p.data, p.last_error or p.target_resolver.last_error or "unable to resolve service");
end
return;
end
p:log("debug", "Next target to try is %s:%d", ip, port);
local conn, err = server.addclient(ip, port, pending_connection_listeners, p.options.pattern or "*a",
extra and extra.sslctx or p.options.sslctx, conn_type, extra);
if not conn then
log("debug", "Connection attempt failed immediately: %s", err);
p.last_error = err or "unknown reason";
return attempt_connection(p);
end
p.conn = conn;
pending_connections_map[conn] = p;
end);
end
function pending_connection_listeners.onconnect(conn)
local p = pending_connections_map[conn];
if not p then
log("warn", "Successful connection, but unexpected! Closing.");
conn:close();
return;
end
pending_connections_map[conn] = nil;
p:log("debug", "Successfully connected");
conn:setlistener(p.listeners, p.data);
return p.listeners.onconnect(conn);
end
function pending_connection_listeners.ondisconnect(conn, reason)
local p = pending_connections_map[conn];
if not p then
log("warn", "Failed connection, but unexpected!");
return;
end
p.last_error = reason or "unknown reason";
p:log("debug", "Connection attempt failed: %s", p.last_error);
attempt_connection(p);
end
local function connect(target_resolver, listeners, options, data)
local p = setmetatable({
id = new_id();
target_resolver = target_resolver;
listeners = assert(listeners);
options = options or {};
data = data;
}, pending_connection_mt);
p:log("debug", "Starting connection process");
attempt_connection(p);
end
return {
connect = connect;
};