Package org.jivesoftware.openfire.net

Class VirtualConnection

  • All Implemented Interfaces:
    Closeable, AutoCloseable, Connection
    Direct Known Subclasses:
    ClientSessionConnection, HttpSession.HttpVirtualConnection, WebSocketConnection
    public abstract class VirtualConnection
extends Object
implements Connection
    Abstract implementation of the Connection interface that models abstract connections. Abstract connections are connections that don't have a physical connection counterpart. Instead they can be seen as conceptual or just 'abstract' connections.

    Default values and common behavior of virtual connections are modeled in this class. Subclasses should just need to specify how packets are delivered and what means closing the connection.

    Author:
    Gaston Dombiak

    • Constructor Detail

      • VirtualConnection

        public VirtualConnection()

    • Method Detail

      • getMajorXMPPVersion

        public int getMajorXMPPVersion()
        Description copied from interface: Connection
        Returns the major version of XMPP being used by this connection (major_version.minor_version. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".
        Specified by:
        getMajorXMPPVersion in interface Connection
        Returns:
        the major XMPP version being used by this connection.

      • getMinorXMPPVersion

        public int getMinorXMPPVersion()
        Description copied from interface: Connection
        Returns the minor version of XMPP being used by this connection (major_version.minor_version. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".
        Specified by:
        getMinorXMPPVersion in interface Connection
        Returns:
        the minor XMPP version being used by this connection.

      • getLocalCertificates

        public Certificate[] getLocalCertificates()
        Description copied from interface: Connection
        Returns the local underlying X509Certificate chain for the connection.
        Specified by:
        getLocalCertificates in interface Connection
        Returns:
        an ordered array of certificates, with the local certificate first followed by any certificate authorities. If no certificates is present for the connection, then null is returned.

      • getPeerCertificates

        public Certificate[] getPeerCertificates()
        Description copied from interface: Connection
        Returns the underlying X509Certificate for the connection of the peer.
        Specified by:
        getPeerCertificates in interface Connection
        Returns:
        an ordered array of peer certificates, with the peer's own certificate first followed by any certificate authorities.

      • setUsingSelfSignedCertificate

        public void setUsingSelfSignedCertificate​(boolean isSelfSigned)
        Description copied from interface: Connection
        Keeps track if the other peer of this session presented a self-signed certificate. When using self-signed certificate for server-2-server sessions then SASL EXTERNAL will not be used and instead server-dialback will be preferred for vcerifying the identify of the remote server.
        Specified by:
        setUsingSelfSignedCertificate in interface Connection
        Parameters:
        isSelfSigned - true if the other peer presented a self-signed certificate.

      • isUsingSelfSignedCertificate

        public boolean isUsingSelfSignedCertificate()
        Description copied from interface: Connection
        Returns true if the other peer of this session presented a self-signed certificate. When using self-signed certificate for server-2-server sessions then SASL EXTERNAL will not be used and instead server-dialback will be preferred for vcerifying the identify of the remote server.
        Specified by:
        isUsingSelfSignedCertificate in interface Connection
        Returns:
        true if the other peer of this session presented a self-signed certificate.

      • isClosed

        public boolean isClosed()
        Description copied from interface: Connection
        Returns true if the connection/session is closed.
        Specified by:
        isClosed in interface Connection
        Returns:
        true if the connection is closed.

      • getTlsPolicy

        public Connection.TLSPolicy getTlsPolicy()
        Description copied from interface: Connection
        Returns whether TLS is mandatory, optional or is disabled. When TLS is mandatory clients are required to secure their connections or otherwise their connections will be closed. On the other hand, when TLS is disabled clients are not allowed to secure their connections using TLS. Their connections will be closed if they try to secure the connection. in this last case.
        Specified by:
        getTlsPolicy in interface Connection
        Returns:
        whether TLS is mandatory, optional or is disabled.

      • isCompressed

        public boolean isCompressed()
        Description copied from interface: Connection
        Returns true if the connection is using compression.
        Specified by:
        isCompressed in interface Connection
        Returns:
        true if the connection is using compression.

      • isFlashClient

        public boolean isFlashClient()
        Description copied from interface: Connection
        Returns true if the connected client is a flash client. Flash clients need to receive a special character (i.e. \0) at the end of each xml packet. Flash clients may send the character \0 in incoming packets and may start a connection using another openning tag such as: "flash:client".
        Specified by:
        isFlashClient in interface Connection
        Returns:
        true if the connected client is a flash client.

      • setFlashClient

        public void setFlashClient​(boolean flashClient)
        Description copied from interface: Connection
        Sets whether the connected client is a flash client. Flash clients need to receive a special character (i.e. \0) at the end of each xml packet. Flash clients may send the character \0 in incoming packets and may start a connection using another openning tag such as: "flash:client".
        Specified by:
        setFlashClient in interface Connection
        Parameters:
        flashClient - true if the if the connection is a flash client.

      • setXMPPVersion

        public void setXMPPVersion​(int majorVersion,
                           int minorVersion)
        Description copied from interface: Connection
        Sets the XMPP version information. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".
        Specified by:
        setXMPPVersion in interface Connection
        Parameters:
        majorVersion - the major version.
        minorVersion - the minor version.

      • setCompressionPolicy

        public void setCompressionPolicy​(Connection.CompressionPolicy compressionPolicy)
        Description copied from interface: Connection
        Sets whether compression is enabled or is disabled.
        Specified by:
        setCompressionPolicy in interface Connection
        Parameters:
        compressionPolicy - whether Compression is enabled or is disabled.

      • setTlsPolicy

        public void setTlsPolicy​(Connection.TLSPolicy tlsPolicy)
        Description copied from interface: Connection
        Sets whether TLS is mandatory, optional or is disabled. When TLS is mandatory clients are required to secure their connections or otherwise their connections will be closed. On the other hand, when TLS is disabled clients are not allowed to secure their connections using TLS. Their connections will be closed if they try to secure the connection. in this last case.
        Specified by:
        setTlsPolicy in interface Connection
        Parameters:
        tlsPolicy - whether TLS is mandatory, optional or is disabled.

      • getPacketDeliverer

        public PacketDeliverer getPacketDeliverer()
        Description copied from interface: Connection
        Returns the packet deliverer to use when delivering a packet over the socket fails. The packet deliverer will retry to send the packet using some other connection, will store the packet offline for later retrieval or will just drop it.
        Specified by:
        getPacketDeliverer in interface Connection
        Returns:
        the packet deliverer to use when delivering a packet over the socket fails.

      • startTLS

        public void startTLS​(boolean clientMode,
                     boolean directTLS)
              throws Exception
        Description copied from interface: Connection
        Secures the plain connection by negotiating TLS with the other peer. In a server-2-server connection the server requesting the TLS negotiation will be the client and the other server will be the server during the TLS negotiation. Therefore, the server requesting the TLS negotiation must pass true in the clientMode parameter and the server receiving the TLS request must pass false in the clientMode parameter.

        In the case of client-2-server the XMPP server must pass false in the clientMode parameter since it will behave as the server in the TLS negotiation.

        Specified by:
        startTLS in interface Connection
        Parameters:
        clientMode - boolean indicating if this entity is a client or a server in the TLS negotiation.
        directTLS - boolean indicating if the negotiation is directTLS (true) or startTLS (false).
        Throws:
        Exception - if an error occured while securing the connection.

      • addCompression

        public void addCompression()
        Description copied from interface: Connection
        Adds the compression filter to the connection but only filter incoming traffic. Do not filter outgoing traffic since we still need to send an uncompressed stanza to the client indicating that he can start compressing the traffic. After we sent the uncompresses stanza we can start compression outgoing traffic as well.
        Specified by:
        addCompression in interface Connection

      • startCompression

        public void startCompression()
        Description copied from interface: Connection
        Start compressing outgoing traffic for this connection. Compression will only be available after TLS has been negotiated. This means that a connection can never be using compression before TLS. However, it is possible to use compression without TLS.
        Specified by:
        startCompression in interface Connection

      • isSecure

        public boolean isSecure()
        Description copied from interface: Connection
        Returns true if this connection is secure.
        Specified by:
        isSecure in interface Connection
        Returns:
        true if the connection is secure (e.g. SSL/TLS)

      • validate

        public boolean validate()
        Description copied from interface: Connection
        Verifies that the connection is still live. Typically this is done by sending a whitespace character between packets.
        Specified by:
        validate in interface Connection
        Returns:
        true if the socket remains valid, false otherwise.

      • init

        public void init​(LocalSession session)
        Description copied from interface: Connection
        Initializes the connection with it's owning session. Allows the connection class to configure itself with session related information (e.g. stream ID).
        Specified by:
        init in interface Connection
        Parameters:
        session - the session that owns this connection

      • reinit

        public void reinit​(LocalSession session)
        Description copied from interface: Connection
        Reinitializes the connection to switch to a different session. This allows for XEP-0198 resumption and transport-switching.
        Specified by:
        reinit in interface Connection
        Parameters:
        session - The new session now owning the connection.

      • close

        public void close()
        Closes the session, the virtual connection and notifies listeners that the connection has been closed.
        Specified by:
        close in interface AutoCloseable
        Specified by:
        close in interface Closeable
        Specified by:
        close in interface Connection

      • registerCloseListener

        public void registerCloseListener​(ConnectionCloseListener listener,
                                  Object handbackMessage)
        Description copied from interface: Connection
        Registers a listener for close event notification. Registrations after the Session is closed will be immediately notified before the registration call returns (within the context of the registration call). An optional handback object can be associated with the registration if the same listener is registered to listen for multiple connection closures.
        Specified by:
        registerCloseListener in interface Connection
        Parameters:
        listener - the listener to register for events.
        handbackMessage - the object to send in the event notification.

      • removeCloseListener

        public void removeCloseListener​(ConnectionCloseListener listener)
        Description copied from interface: Connection
        Removes a registered close event listener. Registered listeners must be able to receive close events up until the time this method returns. (i.e. it is possible to call unregister, receive a close event registration, and then have the unregister call return.)
        Specified by:
        removeCloseListener in interface Connection
        Parameters:
        listener - the listener to deregister for close events.

      • closeVirtualConnection

        public abstract void closeVirtualConnection()
        Closes the virtual connection. Subsclasses should indicate what closing a virtual connection means. At this point the session has a CLOSED state.