49 lines
1.3 KiB
JavaScript
49 lines
1.3 KiB
JavaScript
|
/*
|
||
|
|
* 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
|
||
|
|
}
|