package dns-resolver

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dns-resolver
dns-resolver.mirage
- Dns_resolver_mirage
  - Make
    
    M
    
    P
    
    S
    
    IP
    
    TCP
    
    UDP

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type t

The type of a DNS resolver.

val create : 
  ?size:int ->
  ?mode:[ `Recursive | `Stub ] ->
  int64 ->
  (int -> Cstruct.t) ->
  Dns_server.Primary.s ->
  t

create ~size ~mode now rng primary creates the value of a resolver, pre-filled with root NS and their IP addresses.

val handle_buf : 
  t ->
  Ptime.t ->
  int64 ->
  bool ->
  Dns.proto ->
  Ipaddr.t ->
  int ->
  Cstruct.t ->
  t
  * (Dns.proto * Ipaddr.t * int * Cstruct.t) list
  * (Dns.proto * Ipaddr.t * Cstruct.t) list

handle_buf t now ts query_or_reply proto sender source-port buf handles resolution of buf, which leads to a new t, a list of answers to be transmitted (quadruple of protocol, ip address, port, buffer), and a list of queries (triple of protocol, ip address, buffer).

val query_root : 
  t ->
  int64 ->
  Dns.proto ->
  t * (Dns.proto * Ipaddr.t * Cstruct.t)

query_root t now proto potentially requests an update of the root zone. Best invoked by a regular timer.

val timer : 
  t ->
  int64 ->
  t
  * (Dns.proto * Ipaddr.t * int * Cstruct.t) list
  * (Dns.proto * Ipaddr.t * Cstruct.t) list

timer t now potentially retransmits DNS requests and/or sends NXDomain answers.

val stats : t -> unit

stats t logs some statistics of the cache.