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Send raw payloads over UDP and emit them as udp events

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Review feedback from Cooldude2606: UDP is most useful for arbitrary
blobs, so send_udp now takes any string and the packet is just
"channel?payload".  Plugins get it as a udp-<channel> event with the
payload as a Buffer, or through handleUdp which logs handler errors
like handle does for ipc events.

The host socket is now opened when the RCON client is started and
closed where the RCON client is ended, matching how the RCON client is
handled, instead of being bound in start() and closed by _resetState.

The integration round trip moved to the FactorioServer tests, where it
sends a packet each way through a real server without the module.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
bbassieandClaude Fable 5.1 committed 2026-10-15 16:38:34 +00:00
1 parent 4b0238b64b
commit 7a64706c82
8 files changed
+222 -134
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test/integration/server.js
+49 -3
View File
@@ -125,6 +125,8 @@ describe("Integration of host/src/server", function() {
let mapPath = server.writePath("saves", "test.zip");
await assert.doesNotReject(fs.access(mapPath), "save is missing");
// --enable-lua-udp was added in Factorio 2.0.59
server.enableLuaUdp = lib.integerFullVersion(server.version) >= lib.integerFullVersion("2.0.59");
await server.start("test.zip");
});
});
@@ -159,6 +161,53 @@ describe("Integration of host/src/server", function() {
});
});
describe("Lua UDP", function() {
it("emits udp events for packets sent from the game", async function() {
slowTest(this);
if (!server.enableLuaUdp) {
this.skip();
}
log("Lua UDP from game");
assert(server.hostUdpPort > 0, "host UDP socket is not open");
let waiter = events.once(server, "udp-test_channel");
await server.sendRcon(`/sc helpers.send_udp(${server.hostUdpPort}, "test_channel?hello", 0)`);
let [data] = await waiter;
assert.equal(data.toString(), "hello");
});
it("delivers packets sent with sendUdp to the game", async function() {
slowTest(this);
if (!server.enableLuaUdp) {
this.skip();
}
log("Lua UDP to game");
await server.sendRcon(
"/sc script.on_event(defines.events.on_udp_packet_received, " +
"function(event) print('udp:' .. event.payload) end)"
);
let pass = false;
function filter(output) {
if (output.message === "udp:hello") {
pass = true;
}
}
server.on("output", filter);
await server.sendUdp("hello");
for (let i = 0; i < 10; i++) {
await server.sendRcon("/sc helpers.recv_udp(0)");
await lib.wait(10);
if (pass) {
break;
}
}
server.off("output", filter);
assert(pass, "server did not output the packet payload");
});
});
describe(".stop()", function() {
it("stops the server", async function() {
slowTest(this);
@@ -179,8 +228,6 @@ describe("Integration of host/src/server", function() {
slowTest(this);
log(".startScenario()");
// --enable-lua-udp was added in Factorio 2.0.59
server.enableLuaUdp = lib.integerFullVersion(server.version) >= lib.integerFullVersion("2.0.59");
let pass = false;
function filter(output) {
if (output.message === "test_scenario init") {
@@ -193,7 +240,6 @@ describe("Integration of host/src/server", function() {
log(".stop()");
await server.stop();
server.enableLuaUdp = false;
server.off("output", filter);
assert(pass, "server did not output line from test scenario");