Vishal Chillara SrinivasandVishwanath Chandapur
8458b7fb91
Allow for mDNS service/domain/types browsing. A client can connect to the backend via varlink and receive updates as the requested service becomes available. The interval between the first two queries MUST be at least one second, the intervals between successive queries MUST increase by at least a factor of two. When the interval between queries reaches or exceeds 60 minutes, a querier MAY cap the interval to a maximum of 60 minutes, and perform subsequent queries at a steady-state rate of one query per hour. Delete expired cache entries one second after goodbye packet received as per RFC6762 Section 10.1 Cache maintenance: The querier should plan to issue a query at 80% of the record lifetime, and then if no answer is received, at 85%, 90%, and 95%. If an answer is received, then the remaining TTL is reset to the value given in the answer, and this process repeats for as long as the Multicast DNS querier has an ongoing interest in the record. If no answer is received after four queries, the record is deleted when it reaches 100% of its lifetime. TODO: Improve the DNS transaction logic when multiple clients subscribe to the same service, ensuring that continuous queries are optimized. Co-authored-by: Vishwanath Chandapur <vishwanath.chandapur@philips.com>
System and Service Manager
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