package dns-mirage

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package dns-mirage

dns-mirage
- Dns_mirage
  - Make
    
    IM
    
    IPM
    
    IS
    
    S
    
    IPV4
    
    TCPV4
    
    UDPV4

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type error

The type for UDP errors.

val pp_error : error Fmt.t

pp is the pretty-printer for errors.

type buffer = buffer

The type for memory buffers.

type ipaddr = ipv4addr

The type for an IP address representations.

type ipinput

The type for input function continuation to pass onto the underlying IP stack. This will normally be a NOOP for a conventional kernel, but a direct implementation will parse the buffer.

include Mirage_device.S with type +'a io = 'a io with type t = udpv4

type +'a io = 'a io

The type for potentially blocking I/O operation

type t = udpv4

The type representing the internal state of the device

val disconnect : t -> unit io

Disconnect from the device. While this might take some time to complete, it can never result in an error.

type callback = src:ipaddr -> dst:ipaddr -> src_port:int -> buffer -> unit io

The type for callback functions that adds the UDP metadata for src and dst IP addresses, the src_port of the connection and the buffer payload of the datagram.

val input : listeners:(dst_port:int -> callback option) -> t -> ipinput

input listeners t demultiplexes incoming datagrams based on their destination port. The listeners callback will either return a concrete handler or a None, which results in the datagram being dropped.

val write : 
  ?src_port:int ->
  ?ttl:int ->
  dst:ipaddr ->
  dst_port:int ->
  t ->
  buffer ->
  (unit, error) result io

write ~src_port ~ttl ~dst ~dst_port udp data is a thread that writes data from an optional src_port to a dst and dst_port IPv4 address pair. An optional time-to-live (ttl) is passed through to the IP stack.