1 /* 2 * Copyright (c) 1992, 1993, 1994, 1995, 1996 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 * 21 * @(#) $Header: /tcpdump/master/tcpdump/fddi.h,v 1.11 2002-12-11 07:13:51 guy Exp $ (LBL) 22 */ 23 24 /* 25 * Based on Ultrix if_fddi.h 26 */ 27 28 /* 29 * This stuff should come from a system header file, but there's no 30 * obviously portable way to do that and it's not really going 31 * to change from system to system (except for the padding business). 32 */ 33 34 struct fddi_header { 35 u_char fddi_fc; /* frame control */ 36 u_char fddi_dhost[6]; 37 u_char fddi_shost[6]; 38 }; 39 40 /* 41 * Length of an FDDI header; note that some compilers may pad 42 * "struct fddi_header" to a multiple of 4 bytes, for example, so 43 * "sizeof (struct fddi_header)" may not give the right 44 * answer. 45 */ 46 #define FDDI_HDRLEN 13 47 48 /* Useful values for fddi_fc (frame control) field */ 49 50 /* 51 * FDDI Frame Control bits 52 */ 53 #define FDDIFC_C 0x80 /* Class bit */ 54 #define FDDIFC_L 0x40 /* Address length bit */ 55 #define FDDIFC_F 0x30 /* Frame format bits */ 56 #define FDDIFC_Z 0x0f /* Control bits */ 57 58 /* 59 * FDDI Frame Control values. (48-bit addressing only). 60 */ 61 #define FDDIFC_VOID 0x40 /* Void frame */ 62 #define FDDIFC_NRT 0x80 /* Nonrestricted token */ 63 #define FDDIFC_RT 0xc0 /* Restricted token */ 64 #define FDDIFC_SMT_INFO 0x41 /* SMT Info */ 65 #define FDDIFC_SMT_NSA 0x4F /* SMT Next station adrs */ 66 #define FDDIFC_MAC_BEACON 0xc2 /* MAC Beacon frame */ 67 #define FDDIFC_MAC_CLAIM 0xc3 /* MAC Claim frame */ 68 #define FDDIFC_LLC_ASYNC 0x50 /* Async. LLC frame */ 69 #define FDDIFC_LLC_SYNC 0xd0 /* Sync. LLC frame */ 70 #define FDDIFC_IMP_ASYNC 0x60 /* Implementor Async. */ 71 #define FDDIFC_IMP_SYNC 0xe0 /* Implementor Synch. */ 72 #define FDDIFC_SMT 0x40 /* SMT frame */ 73 #define FDDIFC_MAC 0xc0 /* MAC frame */ 74 75 #define FDDIFC_CLFF 0xF0 /* Class/Length/Format bits */ 76 #define FDDIFC_ZZZZ 0x0F /* Control bits */ 77