micro/tunnel/tunnel.go
2019-09-04 15:41:57 +01:00

69 lines
1.7 KiB
Go

// Package tunnel provides gre network tunnelling
package tunnel
import (
"errors"
"time"
"github.com/micro/go-micro/transport"
)
var (
// ErrDialTimeout is returned by a call to Dial where the timeout occurs
ErrDialTimeout = errors.New("dial timeout")
// DefaultDialTimeout is the dial timeout if none is specified
DefaultDialTimeout = time.Second * 5
)
// Tunnel creates a gre tunnel on top of the go-micro/transport.
// It establishes multiple streams using the Micro-Tunnel-Channel header
// and Micro-Tunnel-Session header. The tunnel id is a hash of
// the address being requested.
type Tunnel interface {
Init(opts ...Option) error
// Address the tunnel is listening on
Address() string
// Connect connects the tunnel
Connect() error
// Close closes the tunnel
Close() error
// Connect to a channel
Dial(channel string, opts ...DialOption) (Session, error)
// Accept connections on a channel
Listen(channel string) (Listener, error)
// All the links the tunnel is connected to
Links() []Link
// Name of the tunnel implementation
String() string
}
// Link represents internal links to the tunnel
type Link interface {
// The id of the link
Id() string
// honours transport socket
transport.Socket
}
// The listener provides similar constructs to the transport.Listener
type Listener interface {
Accept() (Session, error)
Channel() string
Close() error
}
// Session is a unique session created when dialling or accepting connections on the tunnel
type Session interface {
// The unique session id
Id() string
// The channel name
Channel() string
// a transport socket
transport.Socket
}
// NewTunnel creates a new tunnel
func NewTunnel(opts ...Option) Tunnel {
return newTunnel(opts...)
}