1 /* 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 13 * 14 * %sccs.include.redist.c% 15 * 16 * @(#)remote-sl.h 7.3 (Berkeley) 04/20/93 17 * 18 * from: $Header: remote-sl.h,v 1.6 92/11/26 02:04:45 torek Exp $ (LBL) 19 */ 20 21 /* 22 * These definitions are factored out into an include file so 23 * the kernel stub has access to them. 24 */ 25 #define FRAME_START 0xc1 /* Frame End */ 26 #define FRAME_END 0xc0 /* Frame End */ 27 #define FRAME_ESCAPE 0xdb /* Frame Esc */ 28 #define TRANS_FRAME_START 0xde /* transposed frame start */ 29 #define TRANS_FRAME_END 0xdc /* transposed frame esc */ 30 #define TRANS_FRAME_ESCAPE 0xdd /* transposed frame esc */ 31 32 /* 33 * Message limits. SL_MAXDATA is the maximum number of bytes that can 34 * be read or written. SL_BUFSIZE is the maximum amount of data that 35 * can be passed across the serial link. The actual MTU is two times 36 * the max message (since each byte might be escaped), plus the two 37 * framing bytes. We add two to the message length to account for the 38 * type byte and checksum. 39 */ 40 #define SL_MAXDATA 62 /* max data that can be read */ 41 #define SL_RPCSIZE (1 + SL_MAXDATA) /* errno byte + data */ 42 #define SL_MTU ((2 * (SL_RPCSIZE + 2) + 2)) 43