• Alexandre's avatar
    Compute EDNS(0) "Padding" option size · bc2c0bfa
    Alexandre authored
    In order to calculate the number of octets to pad, we need to know the
    size of the DNS query so far. We use dnspython to generate the wire
    query and get its length. We add an EDNS(0) field so we have to add 4
    octets which are the size of the Option code and the Option length. Then
    we can calculate the number of octets to pad based on the Block-length
    strategy (using 128 octets block size).
    See RFC 7830 and 8467.
request.py 5.14 KB