46 lines
2.0 KiB
JavaScript
46 lines
2.0 KiB
JavaScript
//---------------------------------------------------------------------------
|
|
// @syndicate-lang/syntax-test, a demo of Syndicate extensions to JS.
|
|
// Copyright (C) 2016-2018 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
//---------------------------------------------------------------------------
|
|
|
|
import { currentFacet, genUuid } from "@syndicate-lang/core";
|
|
|
|
const U = activate require("@syndicate-lang/driver-udp-node");
|
|
const { PeriodicTick } = activate require("@syndicate-lang/driver-timer");
|
|
|
|
const evil = false; // Set true to hijack mDNS's multicast group and port number (!);
|
|
// Otherwise, set false to use "239.192.57.49", which is in
|
|
// Organization Local Scope (see RFC 2365), and port 5998.
|
|
|
|
const GROUP_ADDRESS = evil ? "224.0.0.251" : "239.192.57.49";
|
|
const PORT = evil ? 5353 : 5998; // make sure your firewall is open to UDP on this port!
|
|
|
|
spawn named 'multicast_demo' {
|
|
const HANDLE = U.UdpListener(PORT);
|
|
during HANDLE {
|
|
assert U.UdpMulticastGroupMember(HANDLE, GROUP_ADDRESS, null);
|
|
assert U.UdpMulticastLoopback(HANDLE, true);
|
|
|
|
on message U.UdpPacket(U.UdpPeer($host, $port), HANDLE, $body) {
|
|
console.log('Got', body, 'from', host, port);
|
|
}
|
|
|
|
on message PeriodicTick(2000) {
|
|
send U.UdpPacket(HANDLE, U.UdpPeer(GROUP_ADDRESS, PORT), genUuid('timestamp'));
|
|
}
|
|
}
|
|
}
|