mirror of https://gitee.com/openkylin/nodejs.git
87 lines
1.8 KiB
JavaScript
87 lines
1.8 KiB
JavaScript
'use strict';
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const {
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Symbol,
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} = primordials;
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const { codes } = require('internal/errors');
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const { UDP } = internalBinding('udp_wrap');
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const { guessHandleType } = internalBinding('util');
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const { isInt32 } = require('internal/validators');
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const { UV_EINVAL } = internalBinding('uv');
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const { ERR_INVALID_ARG_TYPE, ERR_SOCKET_BAD_TYPE } = codes;
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const kStateSymbol = Symbol('state symbol');
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let dns; // Lazy load for startup performance.
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function lookup4(lookup, address, callback) {
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return lookup(address || '127.0.0.1', 4, callback);
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}
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function lookup6(lookup, address, callback) {
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return lookup(address || '::1', 6, callback);
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}
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function newHandle(type, lookup) {
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if (lookup === undefined) {
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if (dns === undefined) {
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dns = require('dns');
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}
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lookup = dns.lookup;
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} else if (typeof lookup !== 'function') {
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throw new ERR_INVALID_ARG_TYPE('lookup', 'Function', lookup);
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}
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if (type === 'udp4') {
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const handle = new UDP();
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handle.lookup = lookup4.bind(handle, lookup);
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return handle;
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}
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if (type === 'udp6') {
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const handle = new UDP();
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handle.lookup = lookup6.bind(handle, lookup);
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handle.bind = handle.bind6;
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handle.connect = handle.connect6;
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handle.send = handle.send6;
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return handle;
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}
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throw new ERR_SOCKET_BAD_TYPE();
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}
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function _createSocketHandle(address, port, addressType, fd, flags) {
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const handle = newHandle(addressType);
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let err;
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if (isInt32(fd) && fd > 0) {
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const type = guessHandleType(fd);
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if (type !== 'UDP') {
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err = UV_EINVAL;
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} else {
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err = handle.open(fd);
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}
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} else if (port || address) {
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err = handle.bind(address, port || 0, flags);
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}
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if (err) {
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handle.close();
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return err;
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}
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return handle;
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}
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module.exports = {
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kStateSymbol,
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_createSocketHandle,
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newHandle
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};
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