Module crab_nat::natpmp

Enums

• Failure
  Errors that may occur when trying to map a port on the gateway, categorized by the root of the issue.
• OperationCode
  Operation codes for NAT-PMP.
• ResultCode
  Result codes from a NAT-PMP response. See https://www.rfc-editor.org/rfc/rfc6886#section-3.5

Constants

• FIRST_TIMEOUT_MILLIS
  The RFC states that the first response timeout SHOULD be 250 milliseconds, and double on each successive failure.
• MAX_DATAGRAM_SIZE
  NAT-PMP does not require datagrams larger than 16 bytes.
• TIMEOUT_CONFIG_DEFAULT
  The default TimeoutConfig for NAT-PMP requests.

Functions

• try_drop_mapping
  Attempts to remove a NAT-PMP mapping on the gateway. Using a local port of None will remove all port mappings for our client with the given protocol.
• try_external_address
  Attempt to complete the ExternalAddress operation. Returns the public IP address of the gateway.
• try_port_mapping
  Attempts to map a port on the gateway using NAT-PMP. Will try to use the given external port if it is Some, otherwise it will let the gateway choose. Will request the specified lifetime if it is Some, otherwise it will use the RFC recommended lifetime.