usr/src/sys/netccitt/dll.h

/*
 * Copyright (C) Dirk Husemann, Computer Science Department IV,
 *               University of Erlangen-Nuremberg, Germany, 1990, 1991, 1992
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)dll.h       8.1 (Berkeley) %G%
 */

/*
 * We define the additional PRC_* codes in here
 */
#ifdef KERNEL
#ifndef PRC_IFUP
#define PRC_IFUP                   3
#endif
#define PRC_CONNECT_INDICATION     8
#define PRC_CONNECT_REQUEST        9
#define PRC_DISCONNECT_REQUEST     10
#define PRC_DISCONNECT_INDICATION  11
#define PRC_RESET_REQUEST          12
#endif

/*
 * Data link layer configuration --- basically a copy of the relevant parts
 * of x25config, implemented to become a little bit more network
 * layer independent. (Probably only used for casting et al.)
 */
struct dllconfig {
       u_short dllcfg_unused0:4,
               dllcfg_unused1:4,
               dllcfg_trace:1,     /* link level tracing flag */
               dllcfg_window:7;    /* link level window size */
       u_short dllcfg_xchxid:1,    /* exchange XID (not yet) */
               dllcfg_unused2:7;   /* here be dragons */
};

struct dll_ctlinfo {
        union {
                struct {
                        struct  dllconfig *dctli_up_cfg;
                        u_char  dctli_up_lsap;
                } CTLI_UP;
                struct {
                        caddr_t dctli_down_pcb;
                        struct rtentry *dctli_down_rt;
                        struct dllconfig *dctli_down_llconf;
                } CTLI_DOWN;
        } CTLIun;
};
#define dlcti_cfg  CTLIun.CTLI_UP.dctli_up_cfg
#define dlcti_lsap CTLIun.CTLI_UP.dctli_up_lsap
#define dlcti_pcb  CTLIun.CTLI_DOWN.dctli_down_pcb
#define dlcti_rt   CTLIun.CTLI_DOWN.dctli_down_rt
#define dlcti_conf CTLIun.CTLI_DOWN.dctli_down_llconf