/* * Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997 *	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: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */#ifndef lintstatic const char rcsid[] _U_ =    "@(#) $Header: /tcpdump/master/tcpdump/print-fddi.c,v 1.66 2005-11-13 12:12:41 guy Exp $ (LBL)";#endif#ifdef HAVE_CONFIG_H#include "config.h"#endif#include <tcpdump-stdinc.h>#include <pcap.h>#include <stdio.h>#include <string.h>#include "interface.h"#include "addrtoname.h"#include "ethertype.h"#include "ether.h"#include "fddi.h"/* * Some FDDI interfaces use bit-swapped addresses. */#if defined(ultrix) || defined(__alpha) || defined(__bsdi) || defined(__NetBSD__) || defined(__linux__)int	fddi_bitswap = 0;#elseint	fddi_bitswap = 1;#endif/* * FDDI support for tcpdump, by Jeffrey Mogul [DECWRL], June 1992 * * Based in part on code by Van Jacobson, which bears this note: * * NOTE:  This is a very preliminary hack for FDDI support. * There are all sorts of wired in constants & nothing (yet) * to print SMT packets as anything other than hex dumps. * Most of the necessary changes are waiting on my redoing * the "header" that a kernel fddi driver supplies to bpf:  I * want it to look like one byte of 'direction' (0 or 1 * depending on whether the packet was inbound or outbound), * two bytes of system/driver dependent data (anything an * implementor thinks would be useful to filter on and/or * save per-packet, then the real 21-byte FDDI header. * Steve McCanne & I have also talked about adding the * 'direction' byte to all bpf headers (e.g., in the two * bytes of padding on an ethernet header).  It's not clear * we could do this in a backwards compatible way & we hate * the idea of an incompatible bpf change.  Discussions are * proceeding. * * Also, to really support FDDI (and better support 802.2 * over ethernet) we really need to re-think the rather simple * minded assumptions about fixed length & fixed format link * level headers made in gencode.c.  One day... * *  - vj */static u_char fddi_bit_swap[] = {	0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,	0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,	0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,	0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,	0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,	0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,	0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,	0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,	0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,	0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,	0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,	0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,	0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,	0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,	0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,	0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,	0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,	0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,	0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,	0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,	0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,	0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,	0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,	0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,	0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,	0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,	0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,	0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,	0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,	0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,	0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,	0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,};/* * Print FDDI frame-control bits */static inline voidprint_fddi_fc(u_char fc){	switch (fc) {	case FDDIFC_VOID:                         /* Void frame */		printf("void ");		break;	case FDDIFC_NRT:                          /* Nonrestricted token */		printf("nrt ");		break;	case FDDIFC_RT:                           /* Restricted token */		printf("rt ");		break;	case FDDIFC_SMT_INFO:                     /* SMT Info */		printf("info ");		break;	case FDDIFC_SMT_NSA:                      /* SMT Next station adrs */		printf("nsa ");		break;	case FDDIFC_MAC_BEACON:                   /* MAC Beacon frame */		printf("beacon ");		break;	case FDDIFC_MAC_CLAIM:                    /* MAC Claim frame */		printf("claim ");		break;	default:		switch (fc & FDDIFC_CLFF) {		case FDDIFC_MAC:			printf("mac%1x ", fc & FDDIFC_ZZZZ);			break;		case FDDIFC_SMT:			printf("smt%1x ", fc & FDDIFC_ZZZZ);			break;		case FDDIFC_LLC_ASYNC:			printf("async%1x ", fc & FDDIFC_ZZZZ);			break;		case FDDIFC_LLC_SYNC:			printf("sync%1x ", fc & FDDIFC_ZZZZ);			break;		case FDDIFC_IMP_ASYNC:			printf("imp_async%1x ", fc & FDDIFC_ZZZZ);			break;		case FDDIFC_IMP_SYNC:			printf("imp_sync%1x ", fc & FDDIFC_ZZZZ);			break;		default:			printf("%02x ", fc);			break;		}	}}/* Extract src, dst addresses */static inline voidextract_fddi_addrs(const struct fddi_header *fddip, char *fsrc, char *fdst){	register int i;	if (fddi_bitswap) {		/*		 * bit-swap the fddi addresses (isn't the IEEE standards		 * process wonderful!) then convert them to names.		 */		for (i = 0; i < 6; ++i)			fdst[i] = fddi_bit_swap[fddip->fddi_dhost[i]];		for (i = 0; i < 6; ++i)			fsrc[i] = fddi_bit_swap[fddip->fddi_shost[i]];	}	else {		memcpy(fdst, (const char *)fddip->fddi_dhost, 6);		memcpy(fsrc, (const char *)fddip->fddi_shost, 6);	}}/* * Print the FDDI MAC header */static inline voidfddi_hdr_print(register const struct fddi_header *fddip, register u_int length,	   register const u_char *fsrc, register const u_char *fdst){	const char *srcname, *dstname;	srcname = etheraddr_string(fsrc);	dstname = etheraddr_string(fdst);	if (vflag)		(void) printf("%02x %s %s %d: ",		       fddip->fddi_fc,		       srcname, dstname,		       length);	else if (qflag)		printf("%s %s %d: ", srcname, dstname, length);	else {		(void) print_fddi_fc(fddip->fddi_fc);		(void) printf("%s %s %d: ", srcname, dstname, length);	}}static inline voidfddi_smt_print(const u_char *p _U_, u_int length _U_){	printf("<SMT printer not yet implemented>");}voidfddi_print(const u_char *p, u_int length, u_int caplen){	const struct fddi_header *fddip = (const struct fddi_header *)p;	struct ether_header ehdr;	u_short extracted_ethertype;	if (caplen < FDDI_HDRLEN) {		printf("[|fddi]");		return;	}	/*	 * Get the FDDI addresses into a canonical form	 */	extract_fddi_addrs(fddip, (char *)ESRC(&ehdr), (char *)EDST(&ehdr));	if (eflag)		fddi_hdr_print(fddip, length, ESRC(&ehdr), EDST(&ehdr));	/* Skip over FDDI MAC header */	length -= FDDI_HDRLEN;	p += FDDI_HDRLEN;	caplen -= FDDI_HDRLEN;	/* Frame Control field determines interpretation of packet */	if ((fddip->fddi_fc & FDDIFC_CLFF) == FDDIFC_LLC_ASYNC) {		/* Try to print the LLC-layer header & higher layers */		if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),		    &extracted_ethertype) == 0) {			/*			 * Some kinds of LLC packet we cannot			 * handle intelligently			 */			if (!eflag)				fddi_hdr_print(fddip, length + FDDI_HDRLEN,				    ESRC(&ehdr), EDST(&ehdr));			if (extracted_ethertype) {				printf("(LLC %s) ",			etherproto_string(htons(extracted_ethertype)));			}			if (!suppress_default_print)				default_print(p, caplen);		}	} else if ((fddip->fddi_fc & FDDIFC_CLFF) == FDDIFC_SMT)		fddi_smt_print(p, caplen);	else {		/* Some kinds of FDDI packet we cannot handle intelligently */		if (!eflag)			fddi_hdr_print(fddip, length + FDDI_HDRLEN, ESRC(&ehdr),			    EDST(&ehdr));		if (!suppress_default_print)			default_print(p, caplen);	}}/* * This is the top level routine of the printer.  'p' points * to the FDDI header of the packet, 'h->ts' is the timestamp, * 'h->len' is the length of the packet off the wire, and 'h->caplen' * is the number of bytes actually captured. */u_intfddi_if_print(const struct pcap_pkthdr *h, register const u_char *p){	fddi_print(p, h->len, h->caplen);	return (FDDI_HDRLEN);}