Module validation 

Shared low-level format validators.

These live in cloudillo-types so that both the high-level Action DSL (cloudillo-action) and the low-level federation request client (cloudillo-core) can use the exact same definition without creating a dependency cycle between those crates.

Functions

canonicalize_dns_host

Canonical form of a DNS host name — the same UTS #46 U-label canonicalize_id_tag produces, without the id_tag length policy.

canonicalize_id_tag

Canonical stored form of an id_tag: the UTS #46 U-label — decoded Unicode, case-folded, NFC-normalised.

dns_host_to_unicode_lossy

The canonical U-label form of a DNS host, falling back to the input verbatim when it cannot be decoded.

id_tag_to_ascii

The A-label (punycode) form, for DNS, URLs and TLS. Never store this — canonicalize_id_tag defines the stored form.

id_tag_to_ascii_lossy

The A-label for use in a hostname, falling back to the input verbatim when it cannot be encoded.

validate_id_tag

Validate an id_tag: true iff it is already canonical.