typedef struct MPIControlAddress {
    long	number;	/* controller number */

    union {
        void		  *mapped;	/* memory address */
        unsigned long	  ioPort;	/* I/O port number */
        char		  *device;   	/* device driver name */
        struct {
            char		*name;	/* image file name */
            MPIControlFileType   type;	/* image file type */
        } file;
        struct {
            char	*server;	/* IP address: host.domain.com */
            long	port;	   	/* socket number */
        } client;
    } type;
} MPIControlAddress;

ControlAddress is a structure that specifies the location of the controller that to be accessed when mpiControlCreate() is called. Please refer to the documentation for mpiControlCreate() to see how to use this structure.