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if_llc.h revision 1.2 
      1 /*
      2  * Copyright (c) 1988 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *      @(#)if_llc.h	7.2 (Berkeley) 6/28/90
     34  */
     35 
     36 #ifndef _NET_IF_LLC_H_
     37 #define _NET_IF_LLC_H_
     38 
     39 /*
     40  * IEEE 802.2 Link Level Control headers, for use in conjunction with
     41  * 802.{3,4,5} media access control methods.
     42  *
     43  * Headers here do not use bit fields due to shortcommings in many
     44  * compilers.
     45  */
     46 
     47 struct llc {
     48 	u_char	llc_dsap;
     49 	u_char	llc_ssap;
     50 	union {
     51 	    struct {
     52 		u_char control;
     53 		u_char format_id;
     54 		u_char class;
     55 		u_char window_x2;
     56 	    } type_u;
     57 	    struct {
     58 		u_char num_snd_x2;
     59 		u_char num_rcv_x2;
     60 	    } type_i;
     61 	    struct {
     62 		u_char control;
     63 		u_char num_rcv_x2;
     64 	    } type_s;
     65 	    struct {
     66 		u_char control;
     67 		u_char org_code[3];
     68 		u_short ether_type;
     69 	    } type_snap;
     70 	} llc_un;
     71 };
     72 #define llc_control llc_un.type_u.control
     73 #define llc_fid llc_un.type_u.format_id
     74 #define llc_class llc_un.type_u.class
     75 #define llc_window llc_un.type_u.window_x2
     76 
     77 #define LLC_UI		0x3
     78 #define LLC_UI_P	0x13
     79 #define LLC_XID		0xaf
     80 #define LLC_XID_P	0xbf
     81 #define LLC_TEST	0xe3
     82 #define LLC_TEST_P	0xf3
     83 
     84 #define LLC_ISO_LSAP	0xfe
     85 #define LLC_SNAP_LSAP	0xaa
     86 
     87 #endif /* !_NET_IF_LLC_H_ */
     88