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