curpri => curpriority

[unix-history] / usr / src / sys / net / if_llc.h

/*
* Copyright (c) 1988, 1993
*      The Regents of the University of California.  All rights reserved.
*
* %sccs.include.redist.c%
*
*      @(#)if_llc.h    8.1 (Berkeley) %G%
*/

/*
* IEEE 802.2 Link Level Control headers, for use in conjunction with
* 802.{3,4,5} media access control methods.
*
* Headers here do not use bit fields due to shortcommings in many
* compilers.
*/

struct llc {
       u_char  llc_dsap;
       u_char  llc_ssap;
       union {
           struct {
               u_char control;
               u_char format_id;
               u_char class;
               u_char window_x2;
           } type_u;
           struct {
               u_char num_snd_x2;
               u_char num_rcv_x2;
           } type_i;
           struct {
               u_char control;
               u_char num_rcv_x2;
           } type_s;
           struct {
               u_char control;
               struct frmrinfo {
                       u_char rej_pdu_0;
                       u_char rej_pdu_1;
                       u_char frmr_control;
                       u_char frmr_control_ext;
                       u_char frmr_cause;
               } frmrinfo;
           } type_frmr;
           struct {
               u_char control;
               u_char org_code[3];
               u_short ether_type;
           } type_snap;
           struct {
               u_char control;
               u_char control_ext;
           } type_raw;
       } llc_un;
};
#define llc_control            llc_un.type_u.control
#define llc_control_ext        llc_un.type_raw.control_ext
#define llc_fid                llc_un.type_u.format_id
#define llc_class              llc_un.type_u.class
#define llc_window             llc_un.type_u.window_x2
#define llc_frmrinfo           llc_un.type_frmr.frmrinfo
#define llc_frmr_pdu0          llc_un.type_frmr.frmrinfo.rej_pdu0
#define llc_frmr_pdu1          llc_un.type_frmr.frmrinfo.rej_pdu1
#define llc_frmr_control       llc_un.type_frmr.frmrinfo.frmr_control
#define llc_frmr_control_ext   llc_un.type_frmr.frmrinfo.frmr_control_ext
#define llc_frmr_cause         llc_un.type_frmr.frmrinfo.frmr_control_ext

/*
* Don't use sizeof(struct llc_un) for LLC header sizes
*/
#define LLC_ISFRAMELEN 4
#define LLC_UFRAMELEN  3
#define LLC_FRMRLEN    7

/*
* Unnumbered LLC format commands
*/
#define LLC_UI          0x3
#define LLC_UI_P        0x13
#define LLC_DISC        0x43
#define LLC_DISC_P      0x53
#define LLC_UA          0x63
#define LLC_UA_P        0x73
#define LLC_TEST        0xe3
#define LLC_TEST_P      0xf3
#define LLC_FRMR        0x87
#define LLC_FRMR_P      0x97
#define LLC_DM          0x0f
#define LLC_DM_P        0x1f
#define LLC_XID         0xaf
#define LLC_XID_P       0xbf
#define LLC_SABME       0x6f
#define LLC_SABME_P     0x7f

/*
* Supervisory LLC commands
*/
#define LLC_RR          0x01
#define LLC_RNR         0x05
#define LLC_REJ         0x09

/*
* Info format - dummy only
*/
#define LLC_INFO        0x00

/*
* ISO PDTR 10178 contains among others
*/
#define LLC_X25_LSAP    0x7e
#define LLC_SNAP_LSAP   0xaa
#define LLC_ISO_LSAP    0xfe