manet

README

multiaddr/net - Multiaddr friendly net

Package multiaddr/net provides Multiaddr specific versions of common functions in stdlib's net package. This means wrappers of standard net symbols like net.Dial and net.Listen, as well as conversion to/from net.Addr.

Docs:

• multiaddr/net: https://godoc.org/github.com/jbenet/go-multiaddr-net
• multiaddr: https://godoc.org/github.com/jbenet/go-multiaddr

Documentation

Overview

Package manet provides Multiaddr specific versions of common functions in stdlib's net package. This means wrappers of standard net symbols like net.Dial and net.Listen, as well as conversion to/from net.Addr.

Index

• Variables
• func AddrMatch(match ma.Multiaddr, addrs []ma.Multiaddr) []ma.Multiaddr
• func DialArgs(m ma.Multiaddr) (string, string, error)
• func FromIP(ip net.IP) (ma.Multiaddr, error)
• func FromNetAddr(a net.Addr) (ma.Multiaddr, error)
• func InterfaceMultiaddrs() ([]ma.Multiaddr, error)
• func IsIP6LinkLocal(m ma.Multiaddr) bool
• func IsIPLoopback(m ma.Multiaddr) bool
• func IsIPUnspecified(m ma.Multiaddr) bool
• func IsThinWaist(m ma.Multiaddr) bool
• func ToNetAddr(maddr ma.Multiaddr) (net.Addr, error)
• type Conn
  • func Dial(remote ma.Multiaddr) (Conn, error)
  • func WrapNetConn(nconn net.Conn) (Conn, error)
• type Dialer
  • func (d *Dialer) Dial(remote ma.Multiaddr) (Conn, error)
• type Listener
  • func Listen(laddr ma.Multiaddr) (Listener, error)
  • func WrapNetListener(nl net.Listener) (Listener, error)

Variables

var (
	// IP4Loopback is the ip4 loopback multiaddr
	IP4Loopback = ma.StringCast("/ip4/127.0.0.1")

	// IP6Loopback is the ip6 loopback multiaddr
	IP6Loopback = ma.StringCast("/ip6/::1")

	// IP6LinkLocalLoopback is the ip6 link-local loopback multiaddr
	IP6LinkLocalLoopback = ma.StringCast("/ip6/fe80::1")
)

Loopback Addresses

var (
	IP4Unspecified = ma.StringCast("/ip4/0.0.0.0")
	IP6Unspecified = ma.StringCast("/ip6/::")
)

Unspecified Addresses (used for )

Functions

func AddrMatch

func AddrMatch(match ma.Multiaddr, addrs []ma.Multiaddr) []ma.Multiaddr

AddrMatch returns the Multiaddrs that match the protocol stack on addr

func DialArgs

func DialArgs(m ma.Multiaddr) (string, string, error)

DialArgs is a convenience function returning arguments for use in net.Dial

func FromIP

func FromIP(ip net.IP) (ma.Multiaddr, error)

FromIP converts a net.IP type to a Multiaddr.

func FromNetAddr

func FromNetAddr(a net.Addr) (ma.Multiaddr, error)

FromNetAddr converts a net.Addr type to a Multiaddr.

func InterfaceMultiaddrs

func InterfaceMultiaddrs() ([]ma.Multiaddr, error)

InterfaceMultiaddrs will return the addresses matching net.InterfaceAddrs

func IsIP6LinkLocal

func IsIP6LinkLocal(m ma.Multiaddr) bool

IP6 Link Local addresses are non routable. The prefix is technically fe80::/10, but we test fe80::/16 for simplicity (no need to mask). So far, no hardware interfaces exist long enough to use those 2 bits. Send a PR if there is.

func IsIPLoopback

func IsIPLoopback(m ma.Multiaddr) bool

IsIPLoopback returns whether a Multiaddr is a "Loopback" IP address This means either /ip4/127.0.0.1 or /ip6/::1 TODO: differentiate IsIPLoopback and OverIPLoopback

func IsIPUnspecified

func IsIPUnspecified(m ma.Multiaddr) bool

IsIPUnspecified returns whether a Multiaddr is am Unspecified IP address This means either /ip4/0.0.0.0 or /ip6/::

func IsThinWaist

func IsThinWaist(m ma.Multiaddr) bool

IsThinWaist returns whether a Multiaddr starts with "Thin Waist" Protocols. This means: /{IP4, IP6}[/{TCP, UDP}]

func ToNetAddr

func ToNetAddr(maddr ma.Multiaddr) (net.Addr, error)

ToNetAddr converts a Multiaddr to a net.Addr Must be ThinWaist. acceptable protocol stacks are: /ip{4,6}/{tcp, udp}

Types

type Conn

type Conn interface {
	net.Conn

	// LocalMultiaddr returns the local Multiaddr associated
	// with this connection
	LocalMultiaddr() ma.Multiaddr

	// RemoteMultiaddr returns the remote Multiaddr associated
	// with this connection
	RemoteMultiaddr() ma.Multiaddr
}

Conn is the equivalent of a net.Conn object. It is the result of calling the Dial or Listen functions in this package, with associated local and remote Multiaddrs.

func Dial

func Dial(remote ma.Multiaddr) (Conn, error)

Dial connects to a remote address. It uses an underlying net.Conn, then wraps it in a Conn object (with local and remote Multiaddrs).

func WrapNetConn

func WrapNetConn(nconn net.Conn) (Conn, error)

WrapNetConn wraps a net.Conn object with a Multiaddr friendly Conn.

type Dialer

type Dialer struct {

	// Dialer is just an embedded net.Dialer, with all its options.
	net.Dialer

	// LocalAddr is the local address to use when dialing an
	// address. The address must be of a compatible type for the
	// network being dialed.
	// If nil, a local address is automatically chosen.
	LocalAddr ma.Multiaddr
}

Dialer contains options for connecting to an address. It is effectively the same as net.Dialer, but its LocalAddr and RemoteAddr options are Multiaddrs, instead of net.Addrs.

func (*Dialer) Dial

func (d *Dialer) Dial(remote ma.Multiaddr) (Conn, error)

Dial connects to a remote address, using the options of the Dialer. Dialer uses an underlying net.Dialer to Dial a net.Conn, then wraps that in a Conn object (with local and remote Multiaddrs).

type Listener

type Listener interface {

	// NetListener returns the embedded net.Listener. Use with caution.
	NetListener() net.Listener

	// Accept waits for and returns the next connection to the listener.
	// Returns a Multiaddr friendly Conn
	Accept() (Conn, error)

	// Close closes the listener.
	// Any blocked Accept operations will be unblocked and return errors.
	Close() error

	// Multiaddr returns the listener's (local) Multiaddr.
	Multiaddr() ma.Multiaddr

	// Addr returns the net.Listener's network address.
	Addr() net.Addr
}

A Listener is a generic network listener for stream-oriented protocols. it uses an embedded net.Listener, overriding net.Listener.Accept to return a Conn and providing Multiaddr.

func Listen

func Listen(laddr ma.Multiaddr) (Listener, error)

Listen announces on the local network address laddr. The Multiaddr must be a "ThinWaist" stream-oriented network: ip4/tcp, ip6/tcp, (TODO: unix, unixpacket) See Dial for the syntax of laddr.

func WrapNetListener

func WrapNetListener(nl net.Listener) (Listener, error)

WrapNetListener wraps a net.Listener with a manet.Listener.