1'use strict'; 2 3const { 4 RegExp, 5 RegExpPrototypeTest, 6 Symbol, 7} = primordials; 8 9const Buffer = require('buffer').Buffer; 10const { writeBuffer } = internalBinding('fs'); 11const errors = require('internal/errors'); 12 13// IPv4 Segment 14const v4Seg = '(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])'; 15const v4Str = `(${v4Seg}[.]){3}${v4Seg}`; 16const IPv4Reg = new RegExp(`^${v4Str}$`); 17 18// IPv6 Segment 19const v6Seg = '(?:[0-9a-fA-F]{1,4})'; 20const IPv6Reg = new RegExp('^(' + 21 `(?:${v6Seg}:){7}(?:${v6Seg}|:)|` + 22 `(?:${v6Seg}:){6}(?:${v4Str}|:${v6Seg}|:)|` + 23 `(?:${v6Seg}:){5}(?::${v4Str}|(:${v6Seg}){1,2}|:)|` + 24 `(?:${v6Seg}:){4}(?:(:${v6Seg}){0,1}:${v4Str}|(:${v6Seg}){1,3}|:)|` + 25 `(?:${v6Seg}:){3}(?:(:${v6Seg}){0,2}:${v4Str}|(:${v6Seg}){1,4}|:)|` + 26 `(?:${v6Seg}:){2}(?:(:${v6Seg}){0,3}:${v4Str}|(:${v6Seg}){1,5}|:)|` + 27 `(?:${v6Seg}:){1}(?:(:${v6Seg}){0,4}:${v4Str}|(:${v6Seg}){1,6}|:)|` + 28 `(?::((?::${v6Seg}){0,5}:${v4Str}|(?::${v6Seg}){1,7}|:))` + 29')(%[0-9a-zA-Z-.:]{1,})?$'); 30 31function isIPv4(s) { 32 return RegExpPrototypeTest(IPv4Reg, s); 33} 34 35function isIPv6(s) { 36 return RegExpPrototypeTest(IPv6Reg, s); 37} 38 39function isIP(s) { 40 if (isIPv4(s)) return 4; 41 if (isIPv6(s)) return 6; 42 return 0; 43} 44 45function makeSyncWrite(fd) { 46 return function(chunk, enc, cb) { 47 if (enc !== 'buffer') 48 chunk = Buffer.from(chunk, enc); 49 50 this._handle.bytesWritten += chunk.length; 51 52 const ctx = {}; 53 writeBuffer(fd, chunk, 0, chunk.length, null, undefined, ctx); 54 if (ctx.errno !== undefined) { 55 const ex = errors.uvException(ctx); 56 ex.errno = ctx.errno; 57 return cb(ex); 58 } 59 cb(); 60 }; 61} 62 63module.exports = { 64 isIP, 65 isIPv4, 66 isIPv6, 67 makeSyncWrite, 68 normalizedArgsSymbol: Symbol('normalizedArgs') 69}; 70