Vector generator

gen_vectors.c builds DNS queries and responses using the same SPCDNS + base32 + dotify logic as the C implementation. It reads vectors.txt and writes JSON to stdout.

Prereqs

• The slipstream C repo checked out with submodules: https://github.com/EndPositive/slipstream
• A C compiler (cc).

The helper script scripts/gen_vectors.sh builds the generator against the C repo (default ../slipstream, override with SLIPSTREAM_DIR) and writes fixtures/vectors/dns-vectors.json.

Format of vectors.txt:

name,id,domain,payload_hex[,mode,qname_override,error_rcode,raw_query_hex]

• payload_hex may be - for an empty payload (only valid with mode != normal).
• mode defaults to normal.
• qname_override is required for invalid_base32, suffix_mismatch, and empty_subdomain, and must include a trailing dot.
• raw_query_hex is required for raw_query_hex mode and is interpreted as a hex-encoded UDP payload.
• Use - as a placeholder to skip optional fields (the CSV parser does not preserve empty fields).
• error_rcode is optional; when set, response_error is emitted. Defaults are used for invalid_base32 and suffix_mismatch.

Built-in modes:

• normal
• invalid_base32
• suffix_mismatch
• non_txt
• empty_subdomain
• qdcount_zero
• not_query
• raw_query_hex

Typical use:

./scripts/gen_vectors.sh

This compiles the generator against the slipstream C repo at ../slipstream (override with SLIPSTREAM_DIR) and requires the C repo submodules to be initialized.