usr/src/sys/netccitt/x25_var.h

/*
 * Copyright (c) 1989 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)x25_var.h   7.1 (Berkeley) %G%
 */


/*
 * Device-independent x25 driver data.
 */
struct  x25com {
        struct  ifnet xc_if;            /* network-visible interface */
/*      int     (*xc_if.if_start)()     /* connect, confirm procedure */
        u_char  xc_addrlen;             /* length of X.121 address */
        u_char  xc_addr[16];            /* X.121 address */
        u_short xc_flags;               /* X.25 specific flags */
        u_short xc_nchan;               /* number of logical channels */
        u_short xc_nactive;             /* number of live logical channels */
        u_short xc_npvc;                /* # of permanent virt. circuits */
        u_short xc_pvcx;                /* index of first pcv */
        u_short xc_svcx;                /* index of first svc */
        u_short xc_dg_idletimo;         /* timeout to close idle dg channel */
        u_short xc_rslvtimo;            /* if name translation fails, rid */
        struct  x25lcb **xc_lcbvec;     /* where to dispatch data */
        int     (*xc_disconnect)();     /* to delete idle dg circuits */
};
#define XCF_HSL3        0x1             /* Hardware support for level 3 */
#define XCF_HSL2        0x2             /* Hardware support for level 2 */


/*
 * Local Connection Block.
 */

struct x25lcb {
        struct  xq      {
                int     (*xq_put)();    /* How to process data */
                struct  mbuf *xq_data;  /* Queued data */
                int     xq_space;       /* For accounting */
                int     xq_flags;
                int     (*xq_unblock)();/* called & cleared when unblocking */
                caddr_t xq_proto;       /* for other service entries */
                caddr_t xq_next;        /* next q, or route, or pcb */
        }       xl_downq, xl_upq;
/*      (*xl_downq.xq_next->xq_put)()   /* LAPB put when using pk_output() */
        int     xl_flags;               /* valid, c-o versus dg */
        int     xl_timer;               /* figure out what to close */
        int     xl_state;               /* connecting, connected, resolving */
        int     xl_index;               /* which entry we are in device table */
        struct  x25com *xl_xc;          /* back pointer to device */
        /*
         * x25pkb (packet-level control block) would follow immediately
         * for devices only supplying LAPB or less.
         */
};
/* flags */
#define XL_VALID        0x1             /* Circuit is live, etc. */
#define XL_DGRAM        0x2             /* not connection oriented, can close */
#define XL_RTHELD       0x4             /* this lcb references rtentry */

#define XQ_UP           0x1             /* I am an up queue */
#define XQ_DOWN         0x2             /* I am a down queue */

/* states for LCB */
#define XLS_NEWBORN     0x0
#define XLS_CONNECTED   0x1
#define XLS_CONNECTING  0x2
#define XLS_RESOLVING   0x3
#define XLS_DISCONNECTING 0x4
#define XLS_FREE        0x5

#ifdef KERNEL
int     x25_ifinput();
#endif