UNPKG

1.31 kBJavaScriptView Raw
1'use strict'
2
3/*
4 * Traditional DNS header OPCODEs (4-bits) defined by IANA in
5 * https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml#dns-parameters-5
6 */
7
8exports.toString = function (opcode) {
9 switch (opcode) {
10 case 0: return 'QUERY'
11 case 1: return 'IQUERY'
12 case 2: return 'STATUS'
13 case 3: return 'OPCODE_3'
14 case 4: return 'NOTIFY'
15 case 5: return 'UPDATE'
16 case 6: return 'OPCODE_6'
17 case 7: return 'OPCODE_7'
18 case 8: return 'OPCODE_8'
19 case 9: return 'OPCODE_9'
20 case 10: return 'OPCODE_10'
21 case 11: return 'OPCODE_11'
22 case 12: return 'OPCODE_12'
23 case 13: return 'OPCODE_13'
24 case 14: return 'OPCODE_14'
25 case 15: return 'OPCODE_15'
26 }
27 return 'OPCODE_' + opcode
28}
29
30exports.toOpcode = function (code) {
31 switch (code.toUpperCase()) {
32 case 'QUERY': return 0
33 case 'IQUERY': return 1
34 case 'STATUS': return 2
35 case 'OPCODE_3': return 3
36 case 'NOTIFY': return 4
37 case 'UPDATE': return 5
38 case 'OPCODE_6': return 6
39 case 'OPCODE_7': return 7
40 case 'OPCODE_8': return 8
41 case 'OPCODE_9': return 9
42 case 'OPCODE_10': return 10
43 case 'OPCODE_11': return 11
44 case 'OPCODE_12': return 12
45 case 'OPCODE_13': return 13
46 case 'OPCODE_14': return 14
47 case 'OPCODE_15': return 15
48 }
49 return 0
50}