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