The pure interface to the client part of uDns.
Various helper modules to do with side effects are available from Dns_client_lwt, Dns_client_unix and so forth.
To learn more about the high-level API, I suggest reading the docstrings of Dns_client_flow.
type 'key query_state constraint 'key = 'a Dns.Rr_map.keyquery_state is parameterized over the query type, so the type of the representation of the answer depends on what the name server was asked to provide. See Dns_map.k for a list of response types. The first element (the int32) in most of the tuples is the Time-To-Live (TTL) field returned from the server, which you can use to calculate when you should request fresh information in case you are writing a long-running application.
val make_query :
(int -> Cstruct.t) ->
Dns.proto ->
'a Domain_name.t ->
'query_type Dns.Rr_map.key ->
Cstruct.t * 'query_type Dns.Rr_map.key query_statemake_query rng protocol name query_type is query, query_state where query is the serialized DNS query to send to the name server, and query_state is the information required to validate the response.
val parse_response :
'query_type Dns.Rr_map.key query_state ->
Cstruct.t ->
('query_type, [ `Msg of string | `Partial ]) Stdlib.resultparse_response query_state response is the information contained in response parsed using query_state when the query was successful, or an Error _ if the response did not match the query_state (or if the query failed).