org.apache.sshd.common.session

Interface ReservedSessionMessagesHandler

All Superinterfaces:

EventListener, SshdEventListener

All Known Implementing Classes:

ReservedSessionMessagesHandlerAdapter

public interface ReservedSessionMessagesHandler
extends SshdEventListener

Provides a way to listen and handle the SSH_MSG_IGNORE and SSH_MSG_DEBUG messages that are received by a session, as well as proprietary and/or extension messages.

Author:

Apache MINA SSHD Project

Method Summary

Modifier and Type	Method and Description
default void	handleDebugMessage(Session session, Buffer buffer) Invoked when an SSH_MSG_DEBUG packet is received
default void	handleIgnoreMessage(Session session, Buffer buffer) Invoked when an SSH_MSG_IGNORE packet is received
default boolean	handleUnimplementedMessage(Session session, int cmd, Buffer buffer) Invoked when a packet with an un-implemented message is received - including SSH_MSG_UNIMPLEMENTED itself
default boolean	sendReservedHeartbeat(ConnectionService service) Invoked if the user configured usage of a proprietary heartbeat mechanism.

Methods inherited from interface org.apache.sshd.common.util.SshdEventListener

validateListener

Method Detail

handleIgnoreMessage

default void handleIgnoreMessage(Session session,
                                 Buffer buffer)
                          throws Exception

Invoked when an SSH_MSG_IGNORE packet is received

Parameters:

session - The Session through which the message was received

buffer - The Buffer containing the data

Throws:

Exception - If failed to handle the message

See Also:

RFC 4253 - section 11.2

handleDebugMessage

default void handleDebugMessage(Session session,
                                Buffer buffer)
                         throws Exception

Invoked when an SSH_MSG_DEBUG packet is received

Parameters:

session - The Session through which the message was received

buffer - The Buffer containing the data

Throws:

Exception - If failed to handle the message

See Also:

RFC 4253 - section 11.3

handleUnimplementedMessage

default boolean handleUnimplementedMessage(Session session,
                                           int cmd,
                                           Buffer buffer)
                                    throws Exception

Invoked when a packet with an un-implemented message is received - including SSH_MSG_UNIMPLEMENTED itself

Parameters:

session - The Session through which the message was received

cmd - The received (un-implemented) command

buffer - The Buffer containing the data - positioned just beyond the command

Returns:

true if message handled internally, false if should return a SSH_MSG_UNIMPLEMENTED reply (default behavior)

Throws:

Exception - If failed to handle the message

See Also:

RFC 4253 - section 11.4

sendReservedHeartbeat

default boolean sendReservedHeartbeat(ConnectionService service)
                               throws Exception

Invoked if the user configured usage of a proprietary heartbeat mechanism. Note: by default throws UnsupportedOperationException so users who configure a proprietary heartbeat mechanism option must provide an implementation for this method.

Parameters:

service - The ConnectionService through which the heartbeat is being executed.

Returns:

true whether heartbeat actually sent - Note: used mainly for debugging purposes.

Throws:

Exception - If failed to send the heartbeat - Note: causes associated session termination.