this.state = state;
    }

    /**
     * Get the time when channel was established
     *
     * @return establishment time in milliseconds
     */
    public long getEstablishedTime() {
        return establishedTime;
    }

    /**
     * Get the last activity time
     *
     * @return last activity time in milliseconds
     */
    public long getLastActivityTime() {

        mac.update(channel.getLocalInterface().getAddress().getAddress());
        mac.update(channel.getRemoteInterface().getAddress().getAddress());
        mac.update(ByteBuffer.allocate(8)
            .putLong(channel.getEstablishedTime()).array());
        
        return mac.doFinal();
    }
}