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- var reIpv4FirstPass = /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/
- var reSubnetString = /\/\d{1,3}(?=%|$)/
- var reForwardSlash = /\//
- var reZone = /%.*$/
- var reBadCharacters = /([^0-9a-f:/%])/i
- var reBadAddress = /([0-9a-f]{5,}|:{3,}|[^:]:$|^:[^:]|\/$)/i
- function validate4 (input) {
- if (!(reIpv4FirstPass.test(input))) return false
- var parts = input.split('.')
- if (parts.length !== 4) return false
- if (parts[0][0] === '0' && parts[0].length > 1) return false
- if (parts[1][0] === '0' && parts[1].length > 1) return false
- if (parts[2][0] === '0' && parts[2].length > 1) return false
- if (parts[3][0] === '0' && parts[3].length > 1) return false
- var n0 = Number(parts[0])
- var n1 = Number(parts[1])
- var n2 = Number(parts[2])
- var n3 = Number(parts[3])
- return (n0 >= 0 && n0 < 256 && n1 >= 0 && n1 < 256 && n2 >= 0 && n2 < 256 && n3 >= 0 && n3 < 256)
- }
- function validate6 (input) {
- var withoutSubnet = input.replace(reSubnetString, '')
- var hasSubnet = (input.length !== withoutSubnet.length)
- // FIXME: this should probably be an option in the future
- if (hasSubnet) return false
- if (!hasSubnet) {
- if (reForwardSlash.test(input)) return false
- }
- var withoutZone = withoutSubnet.replace(reZone, '')
- var lastPartSeparator = withoutZone.lastIndexOf(':')
- if (lastPartSeparator === -1) return false
- var lastPart = withoutZone.substring(lastPartSeparator + 1)
- var hasV4Part = validate4(lastPart)
- var address = (hasV4Part ? withoutZone.substring(0, lastPartSeparator + 1) + '1234:5678' : withoutZone)
- if (reBadCharacters.test(address)) return false
- if (reBadAddress.test(address)) return false
- var halves = address.split('::')
- if (halves.length > 2) return false
- if (halves.length === 2) {
- var first = (halves[0] === '' ? [] : halves[0].split(':'))
- var last = (halves[1] === '' ? [] : halves[1].split(':'))
- var remainingLength = 8 - (first.length + last.length)
- if (remainingLength <= 0) return false
- } else {
- if (address.split(':').length !== 8) return false
- }
- return true
- }
- function validate (input) {
- return validate4(input) || validate6(input)
- }
- module.exports = function validator (options) {
- if (!options) options = {}
- if (options.version === 4) return validate4
- if (options.version === 6) return validate6
- if (options.version == null) return validate
- throw new Error('Unknown version: ' + options.version)
- }
- module.exports['__all_regexes__'] = [
- reIpv4FirstPass,
- reSubnetString,
- reForwardSlash,
- reZone,
- reBadCharacters,
- reBadAddress
- ]
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