include/uapi/linux/x25.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/x25.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/x25.h
Extension
.h
Size
3562 bytes
Lines
154
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct x25_address {
	char x25_addr[16];
};

/*
 *	Linux X.25 Address structure, used for bind, and connect mostly.
 */
struct sockaddr_x25 {
	__kernel_sa_family_t sx25_family;	/* Must be AF_X25 */
	struct x25_address sx25_addr;		/* X.121 Address */
};

/*
 *	DTE/DCE subscription options.
 *
 *      As this is missing lots of options, user should expect major
 *	changes of this structure in 2.5.x which might break compatibilty.
 *      The somewhat ugly dimension 200-sizeof() is needed to maintain
 *	backward compatibility.
 */
struct x25_subscrip_struct {
	char device[200-sizeof(unsigned long)];
	unsigned long	global_facil_mask;	/* 0 to disable negotiation */
	unsigned int	extended;
};

/* values for above global_facil_mask */

#define	X25_MASK_REVERSE	0x01	
#define	X25_MASK_THROUGHPUT	0x02
#define	X25_MASK_PACKET_SIZE	0x04
#define	X25_MASK_WINDOW_SIZE	0x08

#define X25_MASK_CALLING_AE 0x10
#define X25_MASK_CALLED_AE 0x20


/*
 *	Routing table control structure.
 */
struct x25_route_struct {
	struct x25_address address;
	unsigned int	   sigdigits;
	char		   device[200];
};

/*
 *	Facilities structure.
 */
struct x25_facilities {
	unsigned int	winsize_in, winsize_out;
	unsigned int	pacsize_in, pacsize_out;
	unsigned int	throughput;
	unsigned int	reverse;
};

/*
* ITU DTE facilities
* Only the called and calling address
* extension are currently implemented.
* The rest are in place to avoid the struct
* changing size if someone needs them later
*/

struct x25_dte_facilities {
	__u16 delay_cumul;
	__u16 delay_target;
	__u16 delay_max;
	__u8 min_throughput;
	__u8 expedited;
	__u8 calling_len;
	__u8 called_len;
	__u8 calling_ae[20];
	__u8 called_ae[20];
};

/*
 *	Call User Data structure.
 */
struct x25_calluserdata {
	unsigned int	cudlength;
	unsigned char	cuddata[128];
};

/*
 *	Call clearing Cause and Diagnostic structure.
 */
struct x25_causediag {
	unsigned char	cause;
	unsigned char	diagnostic;

Annotation

Implementation Notes