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const {
RegExp,
RegExpPrototypeTest,
Symbol,
} = primordials;
const Buffer = require('buffer').Buffer;
const { writeBuffer } = internalBinding('fs');
const errors = require('internal/errors');
// IPv4 Segment
const v4Seg = '(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])';
const v4Str = `(${v4Seg}[.]){3}${v4Seg}`;
const IPv4Reg = new RegExp(`^${v4Str}$`);
// IPv6 Segment
const v6Seg = '(?:[0-9a-fA-F]{1,4})';
const IPv6Reg = new RegExp('^(' +
`(?:${v6Seg}:){7}(?:${v6Seg}|:)|` +
`(?:${v6Seg}:){6}(?:${v4Str}|:${v6Seg}|:)|` +
`(?:${v6Seg}:){5}(?::${v4Str}|(:${v6Seg}){1,2}|:)|` +
`(?:${v6Seg}:){4}(?:(:${v6Seg}){0,1}:${v4Str}|(:${v6Seg}){1,3}|:)|` +
`(?:${v6Seg}:){3}(?:(:${v6Seg}){0,2}:${v4Str}|(:${v6Seg}){1,4}|:)|` +
`(?:${v6Seg}:){2}(?:(:${v6Seg}){0,3}:${v4Str}|(:${v6Seg}){1,5}|:)|` +
`(?:${v6Seg}:){1}(?:(:${v6Seg}){0,4}:${v4Str}|(:${v6Seg}){1,6}|:)|` +
`(?::((?::${v6Seg}){0,5}:${v4Str}|(?::${v6Seg}){1,7}|:))` +
')(%[0-9a-zA-Z-.:]{1,})?$');
function isIPv4(s) {
// TODO(aduh95): Replace RegExpPrototypeTest with RegExpPrototypeExec when it
// no longer creates a perf regression in the dns benchmark.
// eslint-disable-next-line node-core/avoid-prototype-pollution
return RegExpPrototypeTest(IPv4Reg, s);
}
function isIPv6(s) {
// TODO(aduh95): Replace RegExpPrototypeTest with RegExpPrototypeExec when it
// no longer creates a perf regression in the dns benchmark.
// eslint-disable-next-line node-core/avoid-prototype-pollution
return RegExpPrototypeTest(IPv6Reg, s);
}
function isIP(s) {
if (isIPv4(s)) return 4;
if (isIPv6(s)) return 6;
return 0;
}
function makeSyncWrite(fd) {
return function(chunk, enc, cb) {
if (enc !== 'buffer')
chunk = Buffer.from(chunk, enc);
this._handle.bytesWritten += chunk.length;
const ctx = {};
writeBuffer(fd, chunk, 0, chunk.length, null, undefined, ctx);
if (ctx.errno !== undefined) {
const ex = errors.uvException(ctx);
ex.errno = ctx.errno;
return cb(ex);
}
cb();
};
}
module.exports = {
isIP,
isIPv4,
isIPv6,
makeSyncWrite,
normalizedArgsSymbol: Symbol('normalizedArgs')
};
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