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'use strict'; const common = require('../common'); const assert = require('assert'); const dgram = require('dgram'); const socket = dgram.createSocket('udp4'); socket.bind(0); socket.on('listening', common.mustCall(() => { const result = socket.setTTL(16); assert.strictEqual(result, 16); assert.throws(() => { socket.setTTL('foo'); }, { code: 'ERR_INVALID_ARG_TYPE', name: 'TypeError', message: 'The "ttl" argument must be of type number. Received type string' + " ('foo')" }); // TTL must be a number from > 0 to < 256 assert.throws(() => { socket.setTTL(1000); }, /^Error: setTTL EINVAL$/); socket.close(); }));