README
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golang.org/x/build/revdial/v2
Package revdial implements a Dialer and Listener which work together to turn an accepted connection (for instance, a Hijacked HTTP request) into a Dialer which can then create net.Conns connecting back to the original dialer, which then gets a net.Listener accepting those conns.
Documentation
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Overview ¶
Package revdial implements a Dialer and Listener which work together to turn an accepted connection (for instance, a Hijacked HTTP request) into a Dialer which can then create net.Conns connecting back to the original dialer, which then gets a net.Listener accepting those conns.
This is basically a very minimal SOCKS5 client & server.
The motivation is that sometimes you want to run a server on a machine deep inside a NAT. Rather than connecting to the machine directly (which you can't, because of the NAT), you have the sequestered machine connect out to a public machine. Both sides then use revdial and the public machine can become a client for the NATed machine.
Index ¶
Constants ¶
This section is empty.
Variables ¶
var ErrListenerClosed = errors.New("revdial: Listener closed")
ErrListenerClosed is returned by Accept after Close has been called.
Functions ¶
func ConnHandler ¶
ConnHandler returns the HTTP handler that needs to be mounted somewhere that the Listeners can dial out and get to. A dialer to connect to it is given to NewListener and the path to reach it is given to NewDialer to use in messages to the listener.
func ReadProtoSwitchOrRedirect ¶
ReadProtoSwitchOrRedirect is a helper for completing revdial protocol switch requests. If the response indicates successful switch, nothing is returned. If the response indicates a redirect, the new location is returned.
Types ¶
type Dialer ¶
type Dialer struct {
// contains filtered or unexported fields
}
The Dialer can create new connections.
func NewDialer ¶
NewDialer returns the side of the connection which will initiate new connections. This will typically be the side which did the HTTP Hijack. The connection is (typically) the hijacked HTTP client connection. The connPath is the HTTP path and optional query (but without scheme or host) on the dialer where the ConnHandler is mounted.
type Listener ¶
type Listener struct {
// contains filtered or unexported fields
}
Listener is a net.Listener, returning new connections which arrive from a corresponding Dialer.
func NewListener ¶
NewListener returns a new Listener, accepting connections which arrive from the provided server connection, which should be after any necessary authentication (usually after an HTTP exchange).
The provided dialServer func is responsible for connecting back to the server and doing TLS setup.
func (*Listener) Addr ¶
Addr returns a dummy address. This exists only to conform to the net.Listener interface.
Source Files