/* * <clicknet/llc.h> - contains the definitions for llc frames. * It was originally taken from freebsd and modified for click use. * John Bicket *//* * Copyright (c) 1988, 1993 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *      @(#)if_llc.h	8.1 (Berkeley) 6/10/93 * $FreeBSD: src/sys/net/if_llc.h,v 1.7 1999/08/28 00:48:18 peter Exp $ */#ifndef CLICKNET_LLC_H#define CLICKNET_LLC_H/* * 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 shortcomings in many * compilers. */struct click_llc {	uint8_t	llc_dsap;	uint8_t	llc_ssap;	union {	    struct {		uint8_t control;		uint8_t format_id;	        uint8_t _class;		uint8_t window_x2;	    } type_u;	    struct {		uint8_t num_snd_x2;		uint8_t num_rcv_x2;	    } type_i;	    struct {		uint8_t control;		uint8_t num_rcv_x2;	    } type_s;	    struct {	        uint8_t control;		struct frmrinfo {			uint8_t rej_pdu_0;			uint8_t rej_pdu_1;			uint8_t frmr_control;			uint8_t frmr_control_ext;			uint8_t frmr_cause;		} frmrinfo;	    } type_frmr;	    struct {		uint8_t control;		uint8_t org_code[3];		uint16_t ether_type;	    } type_snap;	    struct {		uint8_t control;		uint8_t 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_IP_LSAP	0x06#define LLC_X25_LSAP	0x7e#define LLC_SNAP_LSAP	0xaa#define LLC_ISO_LSAP	0xfe#endif