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