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rOACCT/node_modules/dns-packet/opcodes.js
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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
			}