[apple/network_cmds.git] / tcpdump.tproj / print-ether.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
 *	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 lint
static const char rcsid[] =
    "@(#) $Header: /cvs/Darwin/Commands/NeXT/network_cmds/tcpdump.tproj/print-ether.c,v 1.1.1.1 1999/05/02 03:58:33 wsanchez Exp $ (LBL)";
#endif

#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>

#if __STDC__
struct mbuf;
struct rtentry;
#endif
#include <net/if.h>

#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>

#include <stdio.h>
#include <pcap.h>

#include "interface.h"
#include "addrtoname.h"
#include "ethertype.h"

const u_char *packetp;
const u_char *snapend;

static inline void
ether_print(register const u_char *bp, u_int length)
{
	register const struct ether_header *ep;

	ep = (const struct ether_header *)bp;
	if (qflag)
		(void)printf("%s %s %d: ",
			     etheraddr_string(ESRC(ep)),
			     etheraddr_string(EDST(ep)),
			     length);
	else
		(void)printf("%s %s %s %d: ",
			     etheraddr_string(ESRC(ep)),
			     etheraddr_string(EDST(ep)),
			     etherproto_string(ep->ether_type),
			     length);
}

/*
 * This is the top level routine of the printer.  'p' is the points
 * to the ether header of the packet, 'tvp' is the timestamp,
 * 'length' is the length of the packet off the wire, and 'caplen'
 * is the number of bytes actually captured.
 */
void
ether_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
{
	u_int caplen = h->caplen;
	u_int length = h->len;
	struct ether_header *ep;
	u_short ether_type;
	extern u_short extracted_ethertype;

	ts_print(&h->ts);

	if (caplen < sizeof(struct ether_header)) {
		printf("[|ether]");
		goto out;
	}

	if (eflag)
		ether_print(p, length);

	/*
	 * Some printers want to get back at the ethernet addresses,
	 * and/or check that they're not walking off the end of the packet.
	 * Rather than pass them all the way down, we set these globals.
	 */
	packetp = p;
	snapend = p + caplen;

	length -= sizeof(struct ether_header);
	caplen -= sizeof(struct ether_header);
	ep = (struct ether_header *)p;
	p += sizeof(struct ether_header);

	ether_type = ntohs(ep->ether_type);

	/*
	 * Is it (gag) an 802.3 encapsulation?
	 */
	extracted_ethertype = 0;
	if (ether_type < ETHERMTU) {
		/* Try to print the LLC-layer header & higher layers */
		if (llc_print(p, length, caplen, ESRC(ep), EDST(ep)) == 0) {
			/* ether_type not known, print raw packet */
			if (!eflag)
				ether_print((u_char *)ep, length);
			if (extracted_ethertype) {
				printf("(LLC %s) ",
			       etherproto_string(htons(extracted_ethertype)));
			}
			if (!xflag && !qflag)
				default_print(p, caplen);
		}
	} else if (ether_encap_print(ether_type, p, length, caplen) == 0) {
		/* ether_type not known, print raw packet */
		if (!eflag)
			ether_print((u_char *)ep, length + sizeof(*ep));
		if (!xflag && !qflag)
			default_print(p, caplen);
	}
	if (xflag)
		default_print(p, caplen);
 out:
	putchar('\n');
}

/*
 * Prints the packet encapsulated in an Ethernet data segment
 * (or an equivalent encapsulation), given the Ethernet type code.
 *
 * Returns non-zero if it can do so, zero if the ethertype is unknown.
 *
 * Stuffs the ether type into a global for the benefit of lower layers
 * that might want to know what it is.
 */

u_short	extracted_ethertype;

int
ether_encap_print(u_short ethertype, const u_char *p,
    u_int length, u_int caplen)
{
	extracted_ethertype = ethertype;

	switch (ethertype) {

	case ETHERTYPE_IP:
		ip_print(p, length);
		return (1);

	case ETHERTYPE_ARP:
	case ETHERTYPE_REVARP:
		arp_print(p, length, caplen);
		return (1);

	case ETHERTYPE_DN:
		decnet_print(p, length, caplen);
		return (1);

	case ETHERTYPE_ATALK:
		if (vflag)
			fputs("et1 ", stdout);
		atalk_print(p, length);
		return (1);

	case ETHERTYPE_AARP:
		aarp_print(p, length);
		return (1);

	case ETHERTYPE_LAT:
	case ETHERTYPE_SCA:
	case ETHERTYPE_MOPRC:
	case ETHERTYPE_MOPDL:
		/* default_print for now */
	default:
		return (0);
	}
}
Commit	Line	Data
b7080c8e A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.0 (the 'License'). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License."
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
	26	* The Regents of the University of California. All rights reserved.
	27	*
	28	* Redistribution and use in source and binary forms, with or without
	29	* modification, are permitted provided that: (1) source code distributions
	30	* retain the above copyright notice and this paragraph in its entirety, (2)
	31	* distributions including binary code include the above copyright notice and
	32	* this paragraph in its entirety in the documentation or other materials
	33	* provided with the distribution, and (3) all advertising materials mentioning
	34	* features or use of this software display the following acknowledgement:
	35	* ``This product includes software developed by the University of California,
	36	* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
	37	* the University nor the names of its contributors may be used to endorse
	38	* or promote products derived from this software without specific prior
	39	* written permission.
	40	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
	41	* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
	42	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	43	*/
	44	#ifndef lint
	45	static const char rcsid[] =
	46	"@(#) $Header: /cvs/Darwin/Commands/NeXT/network_cmds/tcpdump.tproj/print-ether.c,v 1.1.1.1 1999/05/02 03:58:33 wsanchez Exp $ (LBL)";
	47	#endif
	48
	49	#include <sys/param.h>
	50	#include <sys/time.h>
	51	#include <sys/socket.h>
	52
	53	#if __STDC__
	54	struct mbuf;
	55	struct rtentry;
	56	#endif
	57	#include <net/if.h>
	58
	59	#include <netinet/in.h>
	60	#include <netinet/if_ether.h>
	61	#include <netinet/in_systm.h>
	62	#include <netinet/ip.h>
	63	#include <netinet/ip_var.h>
	64	#include <netinet/udp.h>
65	#include <netinet/udp_var.h>
66	#include <netinet/tcp.h>
67	#include <netinet/tcpip.h>
68
69	#include <stdio.h>
70	#include <pcap.h>
71
72	#include "interface.h"
73	#include "addrtoname.h"
74	#include "ethertype.h"
75
76	const u_char *packetp;
77	const u_char *snapend;
78
79	static inline void
80	ether_print(register const u_char *bp, u_int length)
81	{
82	register const struct ether_header *ep;
83
84	ep = (const struct ether_header *)bp;
85	if (qflag)
86	(void)printf("%s %s %d: ",
87	etheraddr_string(ESRC(ep)),
88	etheraddr_string(EDST(ep)),
89	length);
90	else
91	(void)printf("%s %s %s %d: ",
92	etheraddr_string(ESRC(ep)),
93	etheraddr_string(EDST(ep)),
94	etherproto_string(ep->ether_type),
95	length);
96	}
97
98	/*
99	* This is the top level routine of the printer. 'p' is the points
100	* to the ether header of the packet, 'tvp' is the timestamp,
101	* 'length' is the length of the packet off the wire, and 'caplen'
102	* is the number of bytes actually captured.
103	*/
104	void
105	ether_if_print(u_char user, const struct pcap_pkthdr h, const u_char *p)
106	{
107	u_int caplen = h->caplen;
108	u_int length = h->len;
109	struct ether_header *ep;
110	u_short ether_type;
111	extern u_short extracted_ethertype;
112
113	ts_print(&h->ts);
114
115	if (caplen < sizeof(struct ether_header)) {
116	printf("[\|ether]");
117	goto out;
118	}
119
120	if (eflag)
121	ether_print(p, length);
122
123	/*
124	* Some printers want to get back at the ethernet addresses,
125	* and/or check that they're not walking off the end of the packet.
126	* Rather than pass them all the way down, we set these globals.
127	*/
128	packetp = p;
129	snapend = p + caplen;
130
131	length -= sizeof(struct ether_header);
132	caplen -= sizeof(struct ether_header);
133	ep = (struct ether_header *)p;
134	p += sizeof(struct ether_header);
135
136	ether_type = ntohs(ep->ether_type);
137
138	/*
139	* Is it (gag) an 802.3 encapsulation?
140	*/
141	extracted_ethertype = 0;
142	if (ether_type < ETHERMTU) {
143	/* Try to print the LLC-layer header & higher layers */
144	if (llc_print(p, length, caplen, ESRC(ep), EDST(ep)) == 0) {
145	/* ether_type not known, print raw packet */
146	if (!eflag)
147	ether_print((u_char *)ep, length);
148	if (extracted_ethertype) {
149	printf("(LLC %s) ",
150	etherproto_string(htons(extracted_ethertype)));
151	}
152	if (!xflag && !qflag)
153	default_print(p, caplen);
154	}
155	} else if (ether_encap_print(ether_type, p, length, caplen) == 0) {
156	/* ether_type not known, print raw packet */
157	if (!eflag)
158	ether_print((u_char )ep, length + sizeof(ep));
159	if (!xflag && !qflag)
160	default_print(p, caplen);
161	}
162	if (xflag)
163	default_print(p, caplen);
164	out:
165	putchar('\n');
166	}
167
168	/*
169	* Prints the packet encapsulated in an Ethernet data segment
170	* (or an equivalent encapsulation), given the Ethernet type code.
171	*
172	* Returns non-zero if it can do so, zero if the ethertype is unknown.
173	*
174	* Stuffs the ether type into a global for the benefit of lower layers
175	* that might want to know what it is.
176	*/
177
178	u_short extracted_ethertype;
179
180	int
181	ether_encap_print(u_short ethertype, const u_char *p,
182	u_int length, u_int caplen)
183	{
184	extracted_ethertype = ethertype;
185
186	switch (ethertype) {
187
188	case ETHERTYPE_IP:
189	ip_print(p, length);
190	return (1);
191
192	case ETHERTYPE_ARP:
193	case ETHERTYPE_REVARP:
194	arp_print(p, length, caplen);
195	return (1);
196
197	case ETHERTYPE_DN:
198	decnet_print(p, length, caplen);
199	return (1);
200
201	case ETHERTYPE_ATALK:
202	if (vflag)
203	fputs("et1 ", stdout);
204	atalk_print(p, length);
205	return (1);
206
207	case ETHERTYPE_AARP:
208	aarp_print(p, length);
209	return (1);
210
211	case ETHERTYPE_LAT:
212	case ETHERTYPE_SCA:
213	case ETHERTYPE_MOPRC:
214	case ETHERTYPE_MOPDL:
215	/* default_print for now */
216	default:
217	return (0);
218	}
219	}