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      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  */
     54 struct x25_address {
     55 	char x25_addr[16];
     56 };
     57 
     58 /*
     59  *	Linux X.25 Address structure, used for bind, and connect mostly.
     60  */
     61 struct 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  */
     74 struct 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  */
     94 struct x25_route_struct {
     95 	struct x25_address address;
     96 	unsigned int	   sigdigits;
     97 	char		   device[200];
     98 };
     99 
    100 /*
    101  *	Facilities structure.
    102  */
    103 struct 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 
    118 struct 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  */
    133 struct x25_calluserdata {
    134 	unsigned int	cudlength;
    135 	unsigned char	cuddata[128];
    136 };
    137 
    138 /*
    139  *	Call clearing Cause and Diagnostic structure.
    140  */
    141 struct x25_causediag {
    142 	unsigned char	cause;
    143 	unsigned char	diagnostic;
    144 };
    145 
    146 /*
    147  *	Further optional call user data match length selection
    148  */
    149 struct x25_subaddr {
    150 	unsigned int cudmatchlength;
    151 };
    152 
    153 #endif
    154