opcodes.js
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'use strict'
/*
* Traditional DNS header OPCODEs (4-bits) defined by IANA in
* https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml#dns-parameters-5
*/
exports.toString = function (opcode) {
switch (opcode) {
case 0: return 'QUERY'
case 1: return 'IQUERY'
case 2: return 'STATUS'
case 3: return 'OPCODE_3'
case 4: return 'NOTIFY'
case 5: return 'UPDATE'
case 6: return 'OPCODE_6'
case 7: return 'OPCODE_7'
case 8: return 'OPCODE_8'
case 9: return 'OPCODE_9'
case 10: return 'OPCODE_10'
case 11: return 'OPCODE_11'
case 12: return 'OPCODE_12'
case 13: return 'OPCODE_13'
case 14: return 'OPCODE_14'
case 15: return 'OPCODE_15'
}
return 'OPCODE_' + opcode
}
exports.toOpcode = function (code) {
switch (code.toUpperCase()) {
case 'QUERY': return 0
case 'IQUERY': return 1
case 'STATUS': return 2
case 'OPCODE_3': return 3
case 'NOTIFY': return 4
case 'UPDATE': return 5
case 'OPCODE_6': return 6
case 'OPCODE_7': return 7
case 'OPCODE_8': return 8
case 'OPCODE_9': return 9
case 'OPCODE_10': return 10
case 'OPCODE_11': return 11
case 'OPCODE_12': return 12
case 'OPCODE_13': return 13
case 'OPCODE_14': return 14
case 'OPCODE_15': return 15
}
return 0
}