** run out of space it will be set to the offset of the
** next byte to copy from the packet data area. The packet
** length field is decremented by the number of bytes that
** run out of space it will be set to the offset of the
** next byte to copy from the packet data area. The packet
** length field is decremented by the number of bytes that
** zero, we reset the offset pointer to be zero, and free
** the packet from the front of the queue.
*/
** zero, we reset the offset pointer to be zero, and free
** the packet from the front of the queue.
*/