RFC 8777, "DNS Reverse IP Automatic Multicast Tunneling (AMT) Discovery", April 2020

Errata ID: 6155
Status: Verified
Type: Editorial
Publication Format(s) : TEXT, PDF, HTML
Reported By: Jake Holland
Date Reported: 2020-05-01
Verifier Name: Warren Kumari (Ops AD)
Date Verified: 2021-04-27

Section Appendix A says:

   <CODE BEGINS>
     $ cat translate.py
     #!/usr/bin/env python3
     import sys
     name=sys.argv[1]
     wire=''
     for dn in name.split('.'):
       if len(dn) > 0:
         wire += ('%02x' % len(dn))
         wire += (''.join('%02x'%ord(x) for x in dn))
     print(len(wire)//2) + 2
     print(wire)

     $ ./translate.py amtrelays.example.com
     24
     09616d7472656c617973076578616d706c6503636f6d
   <CODE ENDS>

It should say:

   <CODE BEGINS>
     $ cat translate.py
     #!/usr/bin/env python3
     import sys
     name=sys.argv[1]
     wire=''
     for dn in name.split('.'):
       if len(dn) > 0:
         wire += ('%02x' % len(dn))
         wire += (''.join('%02x'%ord(x) for x in dn))
     print(len(wire)//2 + 2)
     print(wire)

     $ ./translate.py amtrelays.example.com
     24
     09616d7472656c617973076578616d706c6503636f6d
   <CODE ENDS>

Notes:

The original sample code gives a runtime error when executed. The +2 should have been inside the parenthesis for the print function.

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