import { PortForwardChannelOpenMessage } from './messages/portForwardChannelOpenMessage';
import { PortForwardRequestMessage } from './messages/portForwardRequestMessage';
import { PortForwardSuccessMessage } from './messages/portForwardSuccessMessage';
/**
 * Enables applications to extend port-forwarding by providing custom message subclasses
 * that may include additional properties.
 *
 * Custom message subclasses must override `SshMessage.onRead` and `SshMessage.onWrite`
 * to handle serialization of any additional properties.
 */
export interface PortForwardMessageFactory {
    /**
     * Creates a message for requesting to forward a port.
     * @param port The port number that is requested, or 0 if a random port is requested.
     * (The other side may choose a different port if the requested port is in use.)
     * @returns An instance or subclass of `PortForwardRequestMessage`.
     */
    createRequestMessageAsync(port: number): Promise<PortForwardRequestMessage>;
    /**
     * Creates a message for a succesful response to a port-forward request.
     * @param port The port number that was requested by the other side. This may be different
     * from the local port that was chosen. Or if the other side requested a random port then
     * the actual chosen port number is returned in the success message.
     * @returns An instance or subclass of `PortForwardSuccessMessage`.
     */
    createSuccessMessageAsync(port: number): Promise<PortForwardSuccessMessage>;
    /**
     * Creates a message requesting to open a channel for a forwarded port.
     * @param port The port number that the channel will connect to. All channel messages use
     * the originally requested port number, which may be different from the actual TCP socket
     * port number if the requested port was in use at the time of the forward request.
     * @returns An instance or subclass of `PortForwardChannelOpenMessage`.
     */
    createChannelOpenMessageAsync(port: number): Promise<PortForwardChannelOpenMessage>;
}
export declare class DefaultPortForwardMessageFactory {
    createRequestMessageAsync(port: number): Promise<PortForwardRequestMessage>;
    createSuccessMessageAsync(port: number): Promise<PortForwardSuccessMessage>;
    createChannelOpenMessageAsync(port: number): Promise<PortForwardChannelOpenMessage>;
}
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