package mirage-protocols

You can search for identifiers within the package.

in-package search v0.2.0

mirage-protocols
- Mirage_protocols
  - ARP
  - Arp
  - ETHERNET
  - Ethernet
  - ICMP
  - ICMPV4
  - IP
  - IPV4
  - IPV6
  - Ip
  - Keepalive
  - TCP
  - Tcp
  - UDP

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Ethernet (IEEE 802.3) is a widely used data link layer. The hardware is usually a twisted pair or fibre connection, on the software side it consists of an Ethernet header where source and destination mac addresses, and a type field, indicating the type of the next layer, are present. The Ethernet layer consists of network card mac address and MTU information, and provides decapsulation and encapsulation.

type error = private [>

| Ethernet.error

]

The type for ethernet interface errors.

val pp_error : error Fmt.t

pp_error is the pretty-printer for errors.

type buffer

The type for memory buffers.

type macaddr

The type for unique MAC identifiers.

include Mirage_device.S

type +'a io

The type for potentially blocking I/O operation

type t

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.

val write : 
  t ->
  ?src:macaddr ->
  macaddr ->
  Ethernet.proto ->
  ?size:int ->
  (buffer -> int) ->
  (unit, error) result io

write eth ~src dst proto ~size payload outputs an ethernet frame which header is filled by eth, and its payload is the buffer from the call to payload. Payload gets a buffer of size (defaults to mtu) to fill with their payload. If size exceeds mtu, an error is returned.

val mac : t -> macaddr

mac eth is the MAC address of eth.

val mtu : t -> int

mtu eth is the Maximum Transmission Unit of the eth i.e. the maximum size of the payload, excluding the ethernet frame header.

val input : 
  arpv4:(buffer -> unit io) ->
  ipv4:(buffer -> unit io) ->
  ipv6:(buffer -> unit io) ->
  t ->
  buffer ->
  unit io

input ~arpv4 ~ipv4 ~ipv6 eth buffer decodes the buffer and demultiplexes it depending on the protocol to the callback.