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60 lines
1.4 KiB
60 lines
1.4 KiB
4 weeks ago
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'use strict'
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exports.toString = function (type) {
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switch (type) {
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// list at
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// https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml#dns-parameters-11
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case 1: return 'LLQ'
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case 2: return 'UL'
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case 3: return 'NSID'
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case 5: return 'DAU'
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case 6: return 'DHU'
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case 7: return 'N3U'
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case 8: return 'CLIENT_SUBNET'
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case 9: return 'EXPIRE'
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case 10: return 'COOKIE'
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case 11: return 'TCP_KEEPALIVE'
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case 12: return 'PADDING'
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case 13: return 'CHAIN'
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case 14: return 'KEY_TAG'
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case 26946: return 'DEVICEID'
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}
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if (type < 0) {
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return null
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}
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return `OPTION_${type}`
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}
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exports.toCode = function (name) {
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if (typeof name === 'number') {
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return name
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}
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if (!name) {
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return -1
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}
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switch (name.toUpperCase()) {
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case 'OPTION_0': return 0
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case 'LLQ': return 1
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case 'UL': return 2
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case 'NSID': return 3
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case 'OPTION_4': return 4
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case 'DAU': return 5
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case 'DHU': return 6
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case 'N3U': return 7
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case 'CLIENT_SUBNET': return 8
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case 'EXPIRE': return 9
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case 'COOKIE': return 10
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case 'TCP_KEEPALIVE': return 11
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case 'PADDING': return 12
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case 'CHAIN': return 13
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case 'KEY_TAG': return 14
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case 'DEVICEID': return 26946
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case 'OPTION_65535': return 65535
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}
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const m = name.match(/_(\d+)$/)
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if (m) {
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return parseInt(m[1], 10)
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}
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return -1
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}
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