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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