TLD specific links

[mattias-p]

We should add a TLD specific link to TLD information in GUI. We should come up with a design for this feature. Here are some questions that should be answered by the design.

• What zones are eligible for links?
• How is the link URL determined?
• How is the link text determined?
• What component is responsible for determining the link?
• How do we protect ourselves from abuse?

[matsduf]

The idea is to have link to some TLD specific information added when a second-level domain under that TLD has been tested.

Example:

• farum.dk has been tested, which is a second level domain under .dk (a TLD)
• A special DNS query is created and sent:
  • QNAME: "_https._tcp._zonemaster" + TLD, e.g. "_https._tcp._zonemaster.dk"
  • QTYPE: URI
• If there is RRset matching the query, then select one record
  • If there are multiple RRs, then only keep records with the lowest priority.
  • If there are still multiple RRs, take the first in the list.
  • If record does not have a valid HTTPS URL in RDATA (third sub field), then discard it.
• If a valid HTTPS URL was found, display e.g. ".dk information" as display name for the URL.
• Absence of URL is just ignored.

In a future update TLD might be redefined to include TLD like strings like co.tw and pp.se.