MANDATORY_VALUE
SVC_PARAM("mandatory", 0u, MANDATORY_VALUE,
SVC_PARAM("alpn", 1u, MANDATORY_VALUE, parse_alpn, parse_alpn),
SVC_PARAM("port", 3u, MANDATORY_VALUE, parse_port, parse_port),
SVC_PARAM("ipv4hint", 4u, MANDATORY_VALUE, parse_ipv4hint, parse_ipv4hint),
SVC_PARAM("ipv6hint", 6u, MANDATORY_VALUE, parse_ipv6hint, parse_ipv6hint),
SVC_PARAM("dohpath", 7u, MANDATORY_VALUE, parse_dohpath, parse_dohpath),
SVC_PARAM("tls-supported-groups", 9u, MANDATORY_VALUE,