x25.h

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/*
 * These are the public elements of the Linux kernel X.25 implementation.
 *
 *  History
 *  mar/20/00   Daniela Squassoni Disabling/enabling of facilities 
 *                    negotiation.
 *  apr/02/05   Shaun Pereira Selective sub address matching with
 *                  call user data
 */

#ifndef X25_KERNEL_H
#define X25_KERNEL_H

#include <linux/types.h>
#include <linux/socket.h>

#define SIOCX25GSUBSCRIP    (SIOCPROTOPRIVATE + 0)
#define SIOCX25SSUBSCRIP    (SIOCPROTOPRIVATE + 1)
#define SIOCX25GFACILITIES  (SIOCPROTOPRIVATE + 2)
#define SIOCX25SFACILITIES  (SIOCPROTOPRIVATE + 3)
#define SIOCX25GCALLUSERDATA    (SIOCPROTOPRIVATE + 4)
#define SIOCX25SCALLUSERDATA    (SIOCPROTOPRIVATE + 5)
#define SIOCX25GCAUSEDIAG   (SIOCPROTOPRIVATE + 6)
#define SIOCX25SCUDMATCHLEN (SIOCPROTOPRIVATE + 7)
#define SIOCX25CALLACCPTAPPRV   (SIOCPROTOPRIVATE + 8)
#define SIOCX25SENDCALLACCPT    (SIOCPROTOPRIVATE + 9)
#define SIOCX25GDTEFACILITIES (SIOCPROTOPRIVATE + 10)
#define SIOCX25SDTEFACILITIES (SIOCPROTOPRIVATE + 11)
#define SIOCX25SCAUSEDIAG   (SIOCPROTOPRIVATE + 12)

/*
 *  Values for {get,set}sockopt.
 */
#define X25_QBITINCL        1

/*
 *  X.25 Packet Size values.
 */
#define X25_PS16        4
#define X25_PS32        5
#define X25_PS64        6
#define X25_PS128       7
#define X25_PS256       8
#define X25_PS512       9
#define X25_PS1024      10
#define X25_PS2048      11
#define X25_PS4096      12

/*
 * An X.121 address, it is held as ASCII text, null terminated, up to 15
 * digits and a null terminator.
 */
struct x25_address {
    char x25_addr[16];
};

/*
 *  Linux X.25 Address structure, used for bind, and connect mostly.
 */
struct sockaddr_x25 {
    __kernel_sa_family_t sx25_family;   /* Must be AF_X25 */
    struct x25_address sx25_addr;       /* X.121 Address */
};

/*
 *  DTE/DCE subscription options.
 *
 *      As this is missing lots of options, user should expect major
 *  changes of this structure in 2.5.x which might break compatibilty.
 *      The somewhat ugly dimension 200-sizeof() is needed to maintain
 *  backward compatibility.
 */
struct x25_subscrip_struct {
    char device[200-sizeof(unsigned long)];
    unsigned long   global_facil_mask;  /* 0 to disable negotiation */
    unsigned int    extended;
};

/* values for above global_facil_mask */

#define X25_MASK_REVERSE    0x01    
#define X25_MASK_THROUGHPUT 0x02
#define X25_MASK_PACKET_SIZE    0x04
#define X25_MASK_WINDOW_SIZE    0x08

#define X25_MASK_CALLING_AE 0x10
#define X25_MASK_CALLED_AE 0x20


/*
 *  Routing table control structure.
 */
struct x25_route_struct {
    struct x25_address address;
    unsigned int       sigdigits;
    char           device[200];
};

/*
 *  Facilities structure.
 */
struct x25_facilities {
    unsigned int    winsize_in, winsize_out;
    unsigned int    pacsize_in, pacsize_out;
    unsigned int    throughput;
    unsigned int    reverse;
};

/*
* ITU DTE facilities
* Only the called and calling address
* extension are currently implemented.
* The rest are in place to avoid the struct
* changing size if someone needs them later
*/

struct x25_dte_facilities {
    __u16 delay_cumul;
    __u16 delay_target;
    __u16 delay_max;
    __u8 min_throughput;
    __u8 expedited;
    __u8 calling_len;
    __u8 called_len;
    __u8 calling_ae[20];
    __u8 called_ae[20];
};

/*
 *  Call User Data structure.
 */
struct x25_calluserdata {
    unsigned int    cudlength;
    unsigned char   cuddata[128];
};

/*
 *  Call clearing Cause and Diagnostic structure.
 */
struct x25_causediag {
    unsigned char   cause;
    unsigned char   diagnostic;
};

/*
 *  Further optional call user data match length selection
 */
struct x25_subaddr {
    unsigned int cudmatchlength;
};

#endif