James Coglan
6cf9767e1c
These tests identify a couple of problems with OPT pseudo-RR parsing. First, any TTL value with the high bit set is replaced with zero before checking the record type. For most types this is correct, since TTLs have the range of signed int32. But for OPT records where the TTL is repurposed to hold the extended RCODE, EDNS version and flags, it means that the high bit cannot be used in extended RCODEs. Any RCODE with the high bit set will be read as zero. Second, the DNS_PACKET_RCODE() function bit-shifts the extended RCODE by 24 places instead of 20, so that it ends up forming the lower 8 bits of a 12-bit RCODE, instead of the upper 8 bits as intended. We intend to fix these issues in other pull requests.
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