1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * These are the public elements of the Linux kernel X.25 implementation.
4 *
5 * 	History
6 *	mar/20/00	Daniela Squassoni Disabling/enabling of facilities
7 *					  negotiation.
8 *	apr/02/05	Shaun Pereira Selective sub address matching with
9 *					call user data
10 */
11
12#ifndef	X25_KERNEL_H
13#define	X25_KERNEL_H
14
15#include <linux/types.h>
16#include <linux/socket.h>
17
18#define	SIOCX25GSUBSCRIP	(SIOCPROTOPRIVATE + 0)
19#define	SIOCX25SSUBSCRIP	(SIOCPROTOPRIVATE + 1)
20#define	SIOCX25GFACILITIES	(SIOCPROTOPRIVATE + 2)
21#define	SIOCX25SFACILITIES	(SIOCPROTOPRIVATE + 3)
22#define	SIOCX25GCALLUSERDATA	(SIOCPROTOPRIVATE + 4)
23#define	SIOCX25SCALLUSERDATA	(SIOCPROTOPRIVATE + 5)
24#define	SIOCX25GCAUSEDIAG	(SIOCPROTOPRIVATE + 6)
25#define SIOCX25SCUDMATCHLEN	(SIOCPROTOPRIVATE + 7)
26#define SIOCX25CALLACCPTAPPRV   (SIOCPROTOPRIVATE + 8)
27#define SIOCX25SENDCALLACCPT    (SIOCPROTOPRIVATE + 9)
28#define SIOCX25GDTEFACILITIES (SIOCPROTOPRIVATE + 10)
29#define SIOCX25SDTEFACILITIES (SIOCPROTOPRIVATE + 11)
30#define SIOCX25SCAUSEDIAG	(SIOCPROTOPRIVATE + 12)
31
32/*
33 *	Values for {get,set}sockopt.
34 */
35#define	X25_QBITINCL		1
36
37/*
38 *	X.25 Packet Size values.
39 */
40#define	X25_PS16		4
41#define	X25_PS32		5
42#define	X25_PS64		6
43#define	X25_PS128		7
44#define	X25_PS256		8
45#define	X25_PS512		9
46#define	X25_PS1024		10
47#define	X25_PS2048		11
48#define	X25_PS4096		12
49
50/*
51 * An X.121 address, it is held as ASCII text, null terminated, up to 15
52 * digits and a null terminator.
53 */
54struct x25_address {
55	char x25_addr[16];
56};
57
58/*
59 *	Linux X.25 Address structure, used for bind, and connect mostly.
60 */
61struct sockaddr_x25 {
62	__kernel_sa_family_t sx25_family;	/* Must be AF_X25 */
63	struct x25_address sx25_addr;		/* X.121 Address */
64};
65
66/*
67 *	DTE/DCE subscription options.
68 *
69 *      As this is missing lots of options, user should expect major
70 *	changes of this structure in 2.5.x which might break compatibilty.
71 *      The somewhat ugly dimension 200-sizeof() is needed to maintain
72 *	backward compatibility.
73 */
74struct x25_subscrip_struct {
75	char device[200-sizeof(unsigned long)];
76	unsigned long	global_facil_mask;	/* 0 to disable negotiation */
77	unsigned int	extended;
78};
79
80/* values for above global_facil_mask */
81
82#define	X25_MASK_REVERSE	0x01
83#define	X25_MASK_THROUGHPUT	0x02
84#define	X25_MASK_PACKET_SIZE	0x04
85#define	X25_MASK_WINDOW_SIZE	0x08
86
87#define X25_MASK_CALLING_AE 0x10
88#define X25_MASK_CALLED_AE 0x20
89
90
91/*
92 *	Routing table control structure.
93 */
94struct x25_route_struct {
95	struct x25_address address;
96	unsigned int	   sigdigits;
97	char		   device[200];
98};
99
100/*
101 *	Facilities structure.
102 */
103struct x25_facilities {
104	unsigned int	winsize_in, winsize_out;
105	unsigned int	pacsize_in, pacsize_out;
106	unsigned int	throughput;
107	unsigned int	reverse;
108};
109
110/*
111* ITU DTE facilities
112* Only the called and calling address
113* extension are currently implemented.
114* The rest are in place to avoid the struct
115* changing size if someone needs them later
116*/
117
118struct x25_dte_facilities {
119	__u16 delay_cumul;
120	__u16 delay_target;
121	__u16 delay_max;
122	__u8 min_throughput;
123	__u8 expedited;
124	__u8 calling_len;
125	__u8 called_len;
126	__u8 calling_ae[20];
127	__u8 called_ae[20];
128};
129
130/*
131 *	Call User Data structure.
132 */
133struct x25_calluserdata {
134	unsigned int	cudlength;
135	unsigned char	cuddata[128];
136};
137
138/*
139 *	Call clearing Cause and Diagnostic structure.
140 */
141struct x25_causediag {
142	unsigned char	cause;
143	unsigned char	diagnostic;
144};
145
146/*
147 *	Further optional call user data match length selection
148 */
149struct x25_subaddr {
150	unsigned int cudmatchlength;
151};
152
153#endif
154