Module crab_nat::pcp

Structs§

BaseMapRequest
The values that must be explicitly defined for all PCP single-port and peer mapping requests.
PeerMapping
A mapping to a peer’s socket address through the gateway (i.e., the PCP server).
PortMappingAllPorts
A port mapping on the gateway using PCP to map all ports to our client through the PCP server.

DropMappingRange
The range of port mappings to drop. Either a Single port for a given protocol or All ports for a single protocols, or all protocols if None.
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
Valid result codes from a PCP response. See https://www.rfc-editor.org/rfc/rfc6887#section-7.4

FIRST_TIMEOUT_SECONDS
The RFC states that the first response timeout “SHOULD be 3 seconds.” https://www.rfc-editor.org/rfc/rfc6887#section-8.1.1 However, this can be very long for modern applications. Using a 1 second default as a compromise.
MAX_DATAGRAM_SIZE
PCP has a maximum size of 1100 bytes, see https://www.rfc-editor.org/rfc/rfc6887#section-7.
MAX_TIMEOUT_SECONDS
The RFC states that the maximum response timeout “SHOULD be 1024 seconds.” https://www.rfc-editor.org/rfc/rfc6887#section-8.1.1
TIMEOUT_CONFIG_DEFAULT
The default TimeoutConfig for PCP requests.

try_drop_mapping
Attempts to remove PCP port mappings for our client from the gateway.
try_peer_mapping
Attempts to open a mapping to a remote peer’s socket address.
try_port_mapping
Attempts to map a port on the gateway using PCP. Will try to use the given external port if it is Some, otherwise it will let the gateway choose.
try_port_mapping_all_ports
Attempts to map all ports on the gateway to the corresponding port on our client using PCP. If the protocol is None, it will try to map all ports for all protocols. Otherwise, only the specified protocol will be mapped.