/* * Copyright (c) 1988, 1989, 1990, 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-sll.c,v 1.19 2005-11-13 12:12:43 guy Exp $ (LBL)";#endif#ifdef HAVE_CONFIG_H#include "config.h"#endif#include <tcpdump-stdinc.h>#include <stdio.h>#include <string.h>#include <pcap.h>#include "interface.h"#include "addrtoname.h"#include "ethertype.h"#include "extract.h"#include "ether.h"#include "sll.h"const struct tok sll_pkttype_values[] = {    { LINUX_SLL_HOST, "In" },    { LINUX_SLL_BROADCAST, "B" },    { LINUX_SLL_MULTICAST, "M" },    { LINUX_SLL_OTHERHOST, "P" },    { LINUX_SLL_OUTGOING, "Out" },    { 0, NULL}};static inline voidsll_print(register const struct sll_header *sllp, u_int length){	u_short ether_type;        printf("%3s ",tok2str(sll_pkttype_values,"?",EXTRACT_16BITS(&sllp->sll_pkttype)));	/*	 * XXX - check the link-layer address type value?	 * For now, we just assume 6 means Ethernet.	 * XXX - print others as strings of hex?	 */	if (EXTRACT_16BITS(&sllp->sll_halen) == 6)		(void)printf("%s ", etheraddr_string(sllp->sll_addr));	if (!qflag) {		ether_type = EXTRACT_16BITS(&sllp->sll_protocol);			if (ether_type <= ETHERMTU) {			/*			 * Not an Ethernet type; what type is it?			 */			switch (ether_type) {			case LINUX_SLL_P_802_3:				/*				 * Ethernet_802.3 IPX frame.				 */				(void)printf("802.3");				break;			case LINUX_SLL_P_802_2:				/*				 * 802.2.				 */				(void)printf("802.3");				break;			default:				/*				 * What is it?				 */				(void)printf("ethertype Unknown (0x%04x)",				    ether_type);				break;			}		} else {			(void)printf("ethertype %s (0x%04x)",			    tok2str(ethertype_values, "Unknown", ether_type),			    ether_type);		}		(void)printf(", length %u: ", length);	}}/* * This is the top level routine of the printer.  'p' points to the * Linux "cooked capture" 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_intsll_if_print(const struct pcap_pkthdr *h, const u_char *p){	u_int caplen = h->caplen;	u_int length = h->len;	register const struct sll_header *sllp;	u_short ether_type;	u_short extracted_ethertype;	if (caplen < SLL_HDR_LEN) {		/*		 * XXX - this "can't happen" because "pcap-linux.c" always		 * adds this many bytes of header to every packet in a		 * cooked socket capture.		 */		printf("[|sll]");		return (caplen);	}	sllp = (const struct sll_header *)p;	if (eflag)		sll_print(sllp, length);	/*	 * Go past the cooked-mode header.	 */	length -= SLL_HDR_LEN;	caplen -= SLL_HDR_LEN;	p += SLL_HDR_LEN;	ether_type = ntohs(sllp->sll_protocol);	/*	 * Is it (gag) an 802.3 encapsulation, or some non-Ethernet	 * packet type?	 */	if (ether_type <= ETHERMTU) {		/*		 * Yes - what type is it?		 */		switch (ether_type) {		case LINUX_SLL_P_802_3:			/*			 * Ethernet_802.3 IPX frame.			 */			ipx_print(p, length);			break;		case LINUX_SLL_P_802_2:			/*			 * 802.2.			 * Try to print the LLC-layer header & higher layers.			 */			if (llc_print(p, length, caplen, NULL, NULL,			    &extracted_ethertype) == 0)				goto unknown;	/* unknown LLC type */			break;		default:			extracted_ethertype = 0;			/*FALLTHROUGH*/		unknown:			/* ether_type not known, print raw packet */			if (!eflag)				sll_print(sllp, length + SLL_HDR_LEN);			if (extracted_ethertype) {				printf("(LLC %s) ",			       etherproto_string(htons(extracted_ethertype)));			}			if (!suppress_default_print)				default_print(p, caplen);			break;		}	} else if (ether_encap_print(ether_type, p, length, caplen,	    &extracted_ethertype) == 0) {		/* ether_type not known, print raw packet */		if (!eflag)			sll_print(sllp, length + SLL_HDR_LEN);		if (!suppress_default_print)			default_print(p, caplen);	}	return (SLL_HDR_LEN);}