| /* |
| * 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 |
| } |