Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/tcpdump/print-ether.c	Lines:	0	117	0.0 %
Date:	2017-11-07	Branches:	0	81	0.0 %


/*	$OpenBSD: print-ether.c,v 1.31 2016/07/11 00:27:50 rzalamena Exp $	*/

/*
 * 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.
 */

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

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

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

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

#ifdef INET6
#include <netinet/ip6.h>
#endif

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

const u_char *packetp;
const u_char *snapend;

void ether_macctl(const u_char *, u_int);

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

	ep = (const struct ether_header *)bp;
	if (qflag) {
		TCHECK2(*ep, 12);
		(void)printf("%s %s %d: ",
			     etheraddr_string(ESRC(ep)),
			     etheraddr_string(EDST(ep)),
			     length);
	} else {
		TCHECK2(*ep, 14);
		(void)printf("%s %s %s %d: ",
			     etheraddr_string(ESRC(ep)),
			     etheraddr_string(EDST(ep)),
			     etherproto_string(ep->ether_type),
			     length);
	}
	return;
trunc:
	printf("[|ether] ");
}

u_short extracted_ethertype;

/*
 * 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)
{
	ts_print(&h->ts);

	/*
	 * 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.
	 */
	snapend = p + h->caplen;

	ether_tryprint(p, h->len, 1);
}

void
ether_tryprint(const u_char *p, u_int length, int first_header)
{
	struct ether_header *ep;
	u_int caplen = snapend - p;
	u_short ether_type;

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

	if (eflag)
		ether_print(p, length);

	packetp = p;
	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) {
				if (eflag)
					default_print(packetp,
					    snapend - packetp);
				else
					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) {
			if (eflag)
				default_print(packetp, snapend - packetp);
			else
				default_print(p, caplen);
		}
	}
	if (xflag && first_header) {
		if (eflag)
			default_print(packetp, snapend - packetp);
		else
			default_print(p, caplen);
	}
 out:
	if (first_header)
		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.
 */

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

	switch (ethertype) {

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

#ifdef INET6
	case ETHERTYPE_IPV6:
		ip6_print(p, length);
		return (1);
#endif /*INET6*/

	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_llap(p, length);
		return (1);

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

	case ETHERTYPE_8021Q:
		printf("802.1Q ");
	case ETHERTYPE_QINQ:
		if (ethertype == ETHERTYPE_QINQ)
			printf("QinQ s");
		printf("vid %d pri %d%s",
		       ntohs(*(unsigned short*)p)&0xFFF,
		       ntohs(*(unsigned short*)p)>>13,
		       (ntohs(*(unsigned short*)p)&0x1000) ? " cfi " : " ");
		ethertype = ntohs(*(unsigned short*)(p+2));
		p += 4;
		length -= 4;
		caplen -= 4;
		if (ethertype > ETHERMTU)
			goto recurse;

		extracted_ethertype = 0;

		if (llc_print(p, length, caplen, p-18, p-12) == 0) {
			/* ether_type not known, print raw packet */
			if (!eflag)
				ether_print(p-18, length+4);
			if (extracted_ethertype) {
				printf("(LLC %s) ",
				etherproto_string(htons(extracted_ethertype)));
			}
			if (!xflag && !qflag)
				default_print(p-18, caplen+4);
		}
		return (1);

#ifdef PPP
	case ETHERTYPE_PPPOEDISC:
	case ETHERTYPE_PPPOE:
		pppoe_if_print(ethertype, p, length, caplen);
		return (1);
#endif

	case ETHERTYPE_FLOWCONTROL:
		ether_macctl(p, length);
		return (1);

	case ETHERTYPE_MPLS:
	case ETHERTYPE_MPLS_MCAST:
		mpls_print(p, length);
		return (1);

	case ETHERTYPE_LLDP:
		lldp_print(p, length);
		return (1);

	case ETHERTYPE_SLOW:
		slow_print(p, length);
		return (1);

	case ETHERTYPE_LAT:
	case ETHERTYPE_SCA:
	case ETHERTYPE_MOPRC:
	case ETHERTYPE_MOPDL:
		/* default_print for now */
	default:
		return (0);
	}
}

void
ether_macctl(const u_char *p, u_int length)
{
	printf("MACCTL");

	if (length < 2)
		goto trunc;
	if (EXTRACT_16BITS(p) == 0x0001) {
		u_int plen;

		printf(" PAUSE");

		length -= 2;
		p += 2;
		if (length < 2)
			goto trunc;
		plen = 512 * EXTRACT_16BITS(p);
		printf(" quanta %u", plen);
	} else {
		printf(" unknown-opcode(0x%04x)", EXTRACT_16BITS(p));
	}
	return;

trunc:
	printf("[|MACCTL]");
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: print-ether.c,v 1.31 2016/07/11 00:27:50 rzalamena Exp $ */
2
3			/*
4			* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
5			* The Regents of the University of California. All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that: (1) source code distributions
9			* retain the above copyright notice and this paragraph in its entirety, (2)
10			* distributions including binary code include the above copyright notice and
11			* this paragraph in its entirety in the documentation or other materials
12			* provided with the distribution, and (3) all advertising materials mentioning
13			* features or use of this software display the following acknowledgement:
14			* ``This product includes software developed by the University of California,
15			* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16			* the University nor the names of its contributors may be used to endorse
17			* or promote products derived from this software without specific prior
18			* written permission.
19			* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20			* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21			* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22			*/
23
24			#include <sys/time.h>
25			#include <sys/socket.h>
26
27			struct mbuf;
28			struct rtentry;
29			#include <net/if.h>
30
31			#include <netinet/in.h>
32			#include <netinet/if_ether.h>
33			#include <netinet/ip.h>
34			#include <netinet/ip_var.h>
35			#include <netinet/udp.h>
36			#include <netinet/udp_var.h>
37			#include <netinet/tcp.h>
38
39			#include <stdio.h>
40			#include <pcap.h>
41
42			#ifdef INET6
43			#include <netinet/ip6.h>
44			#endif
45
46			#include "interface.h"
47			#include "addrtoname.h"
48			#include "ethertype.h"
49			#include "extract.h"
50
51			const u_char *packetp;
52			const u_char *snapend;
53
54			void ether_macctl(const u_char *, u_int);
55
56			void
57			ether_print(const u_char *bp, u_int length)
58			{
59			const struct ether_header *ep;
60
61			ep = (const struct ether_header *)bp;
62			if (qflag) {
63			TCHECK2(*ep, 12);
64			(void)printf("%s %s %d: ",
65			etheraddr_string(ESRC(ep)),
66			etheraddr_string(EDST(ep)),
67			length);
68			} else {
69			TCHECK2(*ep, 14);
70			(void)printf("%s %s %s %d: ",
71			etheraddr_string(ESRC(ep)),
72			etheraddr_string(EDST(ep)),
73			etherproto_string(ep->ether_type),
74			length);
75			}
76			return;
77			trunc:
78			printf("[\|ether] ");
79			}
80
81			u_short extracted_ethertype;
82
83			/*
84			* This is the top level routine of the printer. 'p' is the points
85			* to the ether header of the packet, 'tvp' is the timestamp,
86			* 'length' is the length of the packet off the wire, and 'caplen'
87			* is the number of bytes actually captured.
88			*/
89			void
90			ether_if_print(u_char user, const struct pcap_pkthdr h, const u_char *p)
91			{
92			ts_print(&h->ts);
93
94			/*
95			* Some printers want to get back at the ethernet addresses,
96			* and/or check that they're not walking off the end of the packet.
97			* Rather than pass them all the way down, we set these globals.
98			*/
99			snapend = p + h->caplen;
100
101			ether_tryprint(p, h->len, 1);
102			}
103
104			void
105			ether_tryprint(const u_char *p, u_int length, int first_header)
106			{
107			struct ether_header *ep;
108			u_int caplen = snapend - p;
109			u_short ether_type;
110
111			if (caplen < sizeof(struct ether_header)) {
112			printf("[\|ether]");
113			goto out;
114			}
115
116			if (eflag)
117			ether_print(p, length);
118
119			packetp = p;
120			length -= sizeof(struct ether_header);
121			caplen -= sizeof(struct ether_header);
122			ep = (struct ether_header *)p;
123			p += sizeof(struct ether_header);
124
125			ether_type = ntohs(ep->ether_type);
126
127			/*
128			* Is it (gag) an 802.3 encapsulation?
129			*/
130			extracted_ethertype = 0;
131			if (ether_type <= ETHERMTU) {
132			/* Try to print the LLC-layer header & higher layers */
133			if (llc_print(p, length, caplen, ESRC(ep), EDST(ep)) == 0) {
134			/* ether_type not known, print raw packet */
135			if (!eflag)
136			ether_print((u_char *)ep, length);
137			if (extracted_ethertype) {
138			printf("(LLC %s) ",
139			etherproto_string(htons(extracted_ethertype)));
140			}
141			if (!xflag && !qflag) {
142			if (eflag)
143			default_print(packetp,
144			snapend - packetp);
145			else
146			default_print(p, caplen);
147			}
148			}
149			} else if (ether_encap_print(ether_type, p, length, caplen) == 0) {
150			/* ether_type not known, print raw packet */
151			if (!eflag)
152			ether_print((u_char )ep, length + sizeof(ep));
153			if (!xflag && !qflag) {
154			if (eflag)
155			default_print(packetp, snapend - packetp);
156			else
157			default_print(p, caplen);
158			}
159			}
160			if (xflag && first_header) {
161			if (eflag)
162			default_print(packetp, snapend - packetp);
163			else
164			default_print(p, caplen);
165			}
166			out:
167			if (first_header)
168			putchar('\n');
169			}
170
171			/*
172			* Prints the packet encapsulated in an Ethernet data segment
173			* (or an equivalent encapsulation), given the Ethernet type code.
174			*
175			* Returns non-zero if it can do so, zero if the ethertype is unknown.
176			*
177			* Stuffs the ether type into a global for the benefit of lower layers
178			* that might want to know what it is.
179			*/
180
181			int
182			ether_encap_print(u_short ethertype, const u_char *p,
183			u_int length, u_int caplen)
184			{
185			recurse:
186			extracted_ethertype = ethertype;
187
188			switch (ethertype) {
189
190			case ETHERTYPE_IP:
191			ip_print(p, length);
192			return (1);
193
194			#ifdef INET6
195			case ETHERTYPE_IPV6:
196			ip6_print(p, length);
197			return (1);
198			#endif /INET6/
199
200			case ETHERTYPE_ARP:
201			case ETHERTYPE_REVARP:
202			arp_print(p, length, caplen);
203			return (1);
204
205			case ETHERTYPE_DN:
206			decnet_print(p, length, caplen);
207			return (1);
208
209			case ETHERTYPE_ATALK:
210			if (vflag)
211			fputs("et1 ", stdout);
212			atalk_print_llap(p, length);
213			return (1);
214
215			case ETHERTYPE_AARP:
216			aarp_print(p, length);
217			return (1);
218
219			case ETHERTYPE_8021Q:
220			printf("802.1Q ");
221			case ETHERTYPE_QINQ:
222			if (ethertype == ETHERTYPE_QINQ)
223			printf("QinQ s");
224			printf("vid %d pri %d%s",
225			ntohs((unsigned short)p)&0xFFF,
226			ntohs((unsigned short)p)>>13,
227			(ntohs((unsigned short)p)&0x1000) ? " cfi " : " ");
228			ethertype = ntohs((unsigned short)(p+2));
229			p += 4;
230			length -= 4;
231			caplen -= 4;
232			if (ethertype > ETHERMTU)
233			goto recurse;
234
235			extracted_ethertype = 0;
236
237			if (llc_print(p, length, caplen, p-18, p-12) == 0) {
238			/* ether_type not known, print raw packet */
239			if (!eflag)
240			ether_print(p-18, length+4);
241			if (extracted_ethertype) {
242			printf("(LLC %s) ",
243			etherproto_string(htons(extracted_ethertype)));
244			}
245			if (!xflag && !qflag)
246			default_print(p-18, caplen+4);
247			}
248			return (1);
249
250			#ifdef PPP
251			case ETHERTYPE_PPPOEDISC:
252			case ETHERTYPE_PPPOE:
253			pppoe_if_print(ethertype, p, length, caplen);
254			return (1);
255			#endif
256
257			case ETHERTYPE_FLOWCONTROL:
258			ether_macctl(p, length);
259			return (1);
260
261			case ETHERTYPE_MPLS:
262			case ETHERTYPE_MPLS_MCAST:
263			mpls_print(p, length);
264			return (1);
265
266			case ETHERTYPE_LLDP:
267			lldp_print(p, length);
268			return (1);
269
270			case ETHERTYPE_SLOW:
271			slow_print(p, length);
272			return (1);
273
274			case ETHERTYPE_LAT:
275			case ETHERTYPE_SCA:
276			case ETHERTYPE_MOPRC:
277			case ETHERTYPE_MOPDL:
278			/* default_print for now */
279			default:
280			return (0);
281			}
282			}
283
284			void
285			ether_macctl(const u_char *p, u_int length)
286			{
287			printf("MACCTL");
288
289			if (length < 2)
290			goto trunc;
291			if (EXTRACT_16BITS(p) == 0x0001) {
292			u_int plen;
293
294			printf(" PAUSE");
295
296			length -= 2;
297			p += 2;
298			if (length < 2)
299			goto trunc;
300			plen = 512 * EXTRACT_16BITS(p);
301			printf(" quanta %u", plen);
302			} else {
303			printf(" unknown-opcode(0x%04x)", EXTRACT_16BITS(p));
304			}
305			return;
306
307			trunc:
308			printf("[\|MACCTL]");
309			}