pcp.h File Reference

#include <netaddress.h>
#include <variant>

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Classes
struct	MappingResult
	Successful response to a port mapping. More...

Typedefs
typedef std::array< uint8_t, PCP_MAP_NONCE_SIZE >	PCPMappingNonce
	PCP mapping nonce. Arbitrary data chosen by the client to identify a mapping. More...

Enumerations
enum class	MappingError { NETWORK_ERROR , PROTOCOL_ERROR , UNSUPP_VERSION , NO_RESOURCES }
	Unsuccessful response to a port mapping. More...

Functions
std::variant< MappingResult, MappingError >	NATPMPRequestPortMap (const CNetAddr &gateway, uint16_t port, uint32_t lifetime, int num_tries=3, std::chrono::milliseconds timeout_per_try=std::chrono::milliseconds(1000))
	Try to open a port using RFC 6886 NAT-PMP. More...
std::variant< MappingResult, MappingError >	PCPRequestPortMap (const PCPMappingNonce &nonce, const CNetAddr &gateway, const CNetAddr &bind, uint16_t port, uint32_t lifetime, int num_tries=3, std::chrono::milliseconds timeout_per_try=std::chrono::milliseconds(1000))
	Try to open a port using RFC 6887 Port Control Protocol (PCP). More...

Variables
constexpr size_t	PCP_MAP_NONCE_SIZE = 12
	Mapping nonce size in bytes (see RFC6887 section 11.1). More...

Typedef Documentation

PCPMappingNonce

typedef std::array<uint8_t, PCP_MAP_NONCE_SIZE> PCPMappingNonce

PCP mapping nonce. Arbitrary data chosen by the client to identify a mapping.

Definition at line 19 of file pcp.h.

Enumeration Type Documentation

MappingError

enum class MappingError

strong

Unsuccessful response to a port mapping.

Enumerator
NETWORK_ERROR	Any kind of network-level error.
PROTOCOL_ERROR	Any kind of protocol-level error, except unsupported version or no resources.
UNSUPP_VERSION	Unsupported protocol version.
NO_RESOURCES	No resources available (port probably already mapped).

Definition at line 22 of file pcp.h.

Function Documentation

NATPMPRequestPortMap()

std::variant< MappingResult, MappingError > NATPMPRequestPortMap	(	const CNetAddr &	gateway,
		uint16_t	port,
		uint32_t	lifetime,
		int	num_tries = 3,
		std::chrono::milliseconds	timeout_per_try = std::chrono::milliseconds(1000)
	)

Try to open a port using RFC 6886 NAT-PMP.

IPv4 only.

• gateway: Destination address for PCP requests (usually the default gateway).
• port: Internal port, and desired external port.
• lifetime: Requested lifetime in seconds for mapping. The server may assign as shorter or longer lifetime. A lifetime of 0 deletes the mapping.
• num_tries: Number of tries in case of no response.

Returns the external_ip:external_port of the mapping if successful, otherwise a MappingError.

Definition at line 274 of file pcp.cpp.

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PCPRequestPortMap()

std::variant< MappingResult, MappingError > PCPRequestPortMap	(	const PCPMappingNonce &	nonce,
		const CNetAddr &	gateway,
		const CNetAddr &	bind,
		uint16_t	port,
		uint32_t	lifetime,
		int	num_tries = 3,
		std::chrono::milliseconds	timeout_per_try = std::chrono::milliseconds(1000)
	)

Try to open a port using RFC 6887 Port Control Protocol (PCP).

Handles IPv4 and IPv6.

• nonce: Mapping cookie. Keep this the same over renewals.
• gateway: Destination address for PCP requests (usually the default gateway).
• bind: Specific local bind address for IPv6 pinholing. Set this as INADDR_ANY for IPv4.
• port: Internal port, and desired external port.
• lifetime: Requested lifetime in seconds for mapping. The server may assign as shorter or longer lifetime. A lifetime of 0 deletes the mapping.
• num_tries: Number of tries in case of no response.

Returns the external_ip:external_port of the mapping if successful, otherwise a MappingError.

Definition at line 387 of file pcp.cpp.

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Variable Documentation

PCP_MAP_NONCE_SIZE

constexpr size_t PCP_MAP_NONCE_SIZE = 12

constexpr

Mapping nonce size in bytes (see RFC6887 section 11.1).

Definition at line 16 of file pcp.h.