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