cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/atm_tcp.h

/* atm_tcp.h - Driver-specific declarations of the ATMTCP driver (for use by
               driver-specific utilities) */

/* Written 1997-2000 by Werner Almesberger, EPFL LRC/ICA */


#ifndef _UAPILINUX_ATM_TCP_H

#define _UAPILINUX_ATM_TCP_H

#include <linux/atmapi.h>
#include <linux/atm.h>
#include <linux/atmioc.h>
#include <linux/types.h>


/*
 * All values in struct atmtcp_hdr are in network byte order
 */


struct atmtcp_hdr {
	
__u16	vpi;
	
__u16	vci;
	
__u32	length;		/* ... of data part */
};

/*
 * All values in struct atmtcp_command are in host byte order
 */


#define ATMTCP_HDR_MAGIC	(~0)	
/* this length indicates a command */

#define ATMTCP_CTRL_OPEN	1	
/* request/reply */

#define ATMTCP_CTRL_CLOSE	2	
/* request/reply */


struct atmtcp_control {
	
struct atmtcp_hdr hdr;	/* must be first */
	
int type;		/* message type; both directions */
	
atm_kptr_t vcc;		/* both directions */
	
struct sockaddr_atmpvc addr; /* suggested value from kernel */
	
struct atm_qos	qos;	/* both directions */
	
int result;		/* to kernel only */

} __ATM_API_ALIGN;

/*
 * Field usage:
 * Messge type  dir.    hdr.v?i type    addr    qos     vcc     result
 * -----------  ----    ------- ----    ----    ---     ---     ------
 * OPEN         K->D    Y       Y       Y       Y       Y       0
 * OPEN         D->K    -       Y       Y       Y       Y       Y
 * CLOSE        K->D    -       -       Y       -       Y       0
 * CLOSE        D->K    -       -       -       -       Y       Y
 */


#define SIOCSIFATMTCP	_IO('a',ATMIOC_ITF)	
/* set ATMTCP mode */

#define ATMTCP_CREATE	_IO('a',ATMIOC_ITF+14)	
/* create persistent ATMTCP
                                                   interface */

#define ATMTCP_REMOVE	_IO('a',ATMIOC_ITF+15)	
/* destroy persistent ATMTCP
                                                   interface */



#endif /* _UAPILINUX_ATM_TCP_H */

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