Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/tcpdump/print-cdp.c	Lines:	0	80	0.0 %
Date:	2017-11-07	Branches:	0	67	0.0 %


/*	$OpenBSD: print-cdp.c,v 1.6 2016/03/29 04:07:50 canacar Exp $	*/

/*
 * Copyright (c) 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.
 *
 * Code by Gert Doering, SpaceNet GmbH, gert@space.net
 *
 * Reference documentation:
 *    http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm
 */

#include <sys/time.h>

#include <netinet/in.h>

#include <ctype.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>

#include "interface.h"
#include "addrtoname.h"
#include "extract.h"			/* must come after interface.h */

int cdp_print_addr(const u_char * p, int l);
void cdp_print_prefixes(const u_char * p, int l);

/*
 * Returns non-zero IFF it succeeds in printing the header
 */
void
cdp_print(const u_char *p, u_int length, u_int caplen,
	  const u_char *esrc, const u_char *edst)
{
	int i;
	int type, len;

	/* Cisco Discovery Protocol */

	if (caplen < 12) {
		printf("[|cdp]");
		return;
	}

	i=8;		/* CDP data starts at offset 8 */
	printf("CDP v%d, ttl=%ds", p[i], p[i+1]);
	i+=4;		/* skip version, TTL and chksum */

	while (i < length) {
		if (i + 4 > caplen) {
			printf("[|cdp]");
			return;
		}

		type = (p[i]<<8) + p[i+1];
		len  = (p[i+2]<<8) + p[i+3];

		if (vflag)
			printf(" %02x/%02x", type, len);

		if (len < 4)
			goto error;

		if (i+len > caplen) {
			printf("[|cdp]");
			return;
		}

		switch(type) {
		case 0x01:
			printf(" DevID '%.*s'", len - 4, p + i + 4);
			break;
		case 0x02:
			printf(" Addr");
			if (cdp_print_addr(p + i + 4, len - 4))
				goto error;
			break;
		case 0x03:
			printf(" PortID '%.*s'", len - 4, p + i + 4);
			break;
		case 0x04:
			if (len < 8)
				goto error;
			printf(" CAP 0x%02x", (unsigned) p[i+7]);
			break;
		case 0x05:
			if (vflag)
				printf(" Version %.*s", len-4, p+i+4 );
			else
				printf(" Version (suppressed)" );
			break;
		case 0x06:
			printf(" Platform '%.*s'", len-4, p+i+4 );
			break;
		case 0x07:
			cdp_print_prefixes(p+i+4, len-4);
			break;
		case 0x09:		/* guess - not documented */
			printf(" VTP-Management-Domain '%.*s'", len-4, p+i+4 );
			break;
		case 0x0a:		/* guess - not documented */
			if (len < 6)
				goto error;
			printf(" Native-VLAN-ID %d", (p[i+4]<<8) + p[i+4+1] - 1 );
			break;
		case 0x0b:		/* guess - not documented */
			if (len < 5)
				goto error;
			printf(" Duplex %s", p[i+4] ? "full": "half" );
			break;
		default:
			printf(" unknown-type %02x len %d", type, len );
		}

		/* avoid infinite loop */
		if (len == 0)
			break;
		i += len;
	}
error:
	printf("[!cdp]");
}

#define CDP_CHECK_ACCESS(p, s) if ((endp - (p)) < (s)) return 1

int
cdp_print_addr(const u_char * p, int l)
{
	int pl, pt, al, num;
	const u_char * endp = p+l;

	CDP_CHECK_ACCESS(p, 4);
	num = (p[0] << 24) + (p[1]<<16) + (p[2]<<8)+ p[3];
	p+=4;

	printf(" (%d): ", num);

	while(p < endp && num >= 0) {
		CDP_CHECK_ACCESS(p, 2);
		pt=*p;
		pl=*(p+1);
		p+=2;

		CDP_CHECK_ACCESS(p, 3);
		/* special case: IPv4, protocol type=0xcc, addr. length=4 */
		if (pl == 1 && *p == 0xcc && p[1] == 0 && p[2] == 4) {
			p+=3;

			CDP_CHECK_ACCESS(p, 4);
			printf("IPv4 %d.%d.%d.%d ", p[0], p[1], p[2], p[3]);
			p+=4;
		} else {	/* generic case: just print raw data */
			printf("pt=0x%02x, pl=%d, pb=", pt, pl);

			CDP_CHECK_ACCESS(p, pl);
			while(pl-- > 0)
				printf(" %02x", *p++);

			CDP_CHECK_ACCESS(p, 2);
			al=(*p << 8) + *(p+1);
			printf(", al=%d, a=", al);
			p+=2;

			CDP_CHECK_ACCESS(p, al);
			while(al-- > 0)
				printf(" %02x", *p++);
		}
		printf("  ");
		num--;
	}

	return 0;
}


void
cdp_print_prefixes(const u_char * p, int l)
{
	printf(" IPv4 Prefixes (%d):", l/5);

	while (l > 0) {
		if (l >= 5)
			printf(" %d.%d.%d.%d/%d", p[0], p[1], p[2], p[3], p[4] );
		l-=5; p+=5;
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: print-cdp.c,v 1.6 2016/03/29 04:07:50 canacar Exp $ */
2
3			/*
4			* Copyright (c) 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			* Code by Gert Doering, SpaceNet GmbH, gert@space.net
24			*
25			* Reference documentation:
26			* http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm
27			*/
28
29			#include <sys/time.h>
30
31			#include <netinet/in.h>
32
33			#include <ctype.h>
34			#include <netdb.h>
35			#include <stdio.h>
36			#include <string.h>
37
38			#include "interface.h"
39			#include "addrtoname.h"
40			#include "extract.h" /* must come after interface.h */
41
42			int cdp_print_addr(const u_char * p, int l);
43			void cdp_print_prefixes(const u_char * p, int l);
44
45			/*
46			* Returns non-zero IFF it succeeds in printing the header
47			*/
48			void
49			cdp_print(const u_char *p, u_int length, u_int caplen,
50			const u_char esrc, const u_char edst)
51			{
52			int i;
53			int type, len;
54
55			/* Cisco Discovery Protocol */
56
57			if (caplen < 12) {
58			printf("[\|cdp]");
59			return;
60			}
61
62			i=8; /* CDP data starts at offset 8 */
63			printf("CDP v%d, ttl=%ds", p[i], p[i+1]);
64			i+=4; /* skip version, TTL and chksum */
65
66			while (i < length) {
67			if (i + 4 > caplen) {
68			printf("[\|cdp]");
69			return;
70			}
71
72			type = (p[i]<<8) + p[i+1];
73			len = (p[i+2]<<8) + p[i+3];
74
75			if (vflag)
76			printf(" %02x/%02x", type, len);
77
78			if (len < 4)
79			goto error;
80
81			if (i+len > caplen) {
82			printf("[\|cdp]");
83			return;
84			}
85
86			switch(type) {
87			case 0x01:
88			printf(" DevID '%.*s'", len - 4, p + i + 4);
89			break;
90			case 0x02:
91			printf(" Addr");
92			if (cdp_print_addr(p + i + 4, len - 4))
93			goto error;
94			break;
95			case 0x03:
96			printf(" PortID '%.*s'", len - 4, p + i + 4);
97			break;
98			case 0x04:
99			if (len < 8)
100			goto error;
101			printf(" CAP 0x%02x", (unsigned) p[i+7]);
102			break;
103			case 0x05:
104			if (vflag)
105			printf(" Version %.*s", len-4, p+i+4 );
106			else
107			printf(" Version (suppressed)" );
108			break;
109			case 0x06:
110			printf(" Platform '%.*s'", len-4, p+i+4 );
111			break;
112			case 0x07:
113			cdp_print_prefixes(p+i+4, len-4);
114			break;
115			case 0x09: /* guess - not documented */
116			printf(" VTP-Management-Domain '%.*s'", len-4, p+i+4 );
117			break;
118			case 0x0a: /* guess - not documented */
119			if (len < 6)
120			goto error;
121			printf(" Native-VLAN-ID %d", (p[i+4]<<8) + p[i+4+1] - 1 );
122			break;
123			case 0x0b: /* guess - not documented */
124			if (len < 5)
125			goto error;
126			printf(" Duplex %s", p[i+4] ? "full": "half" );
127			break;
128			default:
129			printf(" unknown-type %02x len %d", type, len );
130			}
131
132			/* avoid infinite loop */
133			if (len == 0)
134			break;
135			i += len;
136			}
137			error:
138			printf("[!cdp]");
139			}
140
141			#define CDP_CHECK_ACCESS(p, s) if ((endp - (p)) < (s)) return 1
142
143			int
144			cdp_print_addr(const u_char * p, int l)
145			{
146			int pl, pt, al, num;
147			const u_char * endp = p+l;
148
149			CDP_CHECK_ACCESS(p, 4);
150			num = (p[0] << 24) + (p[1]<<16) + (p[2]<<8)+ p[3];
151			p+=4;
152
153			printf(" (%d): ", num);
154
155			while(p < endp && num >= 0) {
156			CDP_CHECK_ACCESS(p, 2);
157			pt=*p;
158			pl=*(p+1);
159			p+=2;
160
161			CDP_CHECK_ACCESS(p, 3);
162			/* special case: IPv4, protocol type=0xcc, addr. length=4 */
163			if (pl == 1 && *p == 0xcc && p[1] == 0 && p[2] == 4) {
164			p+=3;
165
166			CDP_CHECK_ACCESS(p, 4);
167			printf("IPv4 %d.%d.%d.%d ", p[0], p[1], p[2], p[3]);
168			p+=4;
169			} else { /* generic case: just print raw data */
170			printf("pt=0x%02x, pl=%d, pb=", pt, pl);
171
172			CDP_CHECK_ACCESS(p, pl);
173			while(pl-- > 0)
174			printf(" %02x", *p++);
175
176			CDP_CHECK_ACCESS(p, 2);
177			al=(p << 8) + (p+1);
178			printf(", al=%d, a=", al);
179			p+=2;
180
181			CDP_CHECK_ACCESS(p, al);
182			while(al-- > 0)
183			printf(" %02x", *p++);
184			}
185			printf(" ");
186			num--;
187			}
188
189			return 0;
190			}
191
192
193			void
194			cdp_print_prefixes(const u_char * p, int l)
195			{
196			printf(" IPv4 Prefixes (%d):", l/5);
197
198			while (l > 0) {
199			if (l >= 5)
200			printf(" %d.%d.%d.%d/%d", p[0], p[1], p[2], p[3], p[4] );
201			l-=5; p+=5;
202			}
203			}