valgrindtest.c revision d8845d7191ca81aae8aab4c29410fc8a3d012687 
1/*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22#ifndef lint
23static const char copyright[] _U_ =
24    "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
25The Regents of the University of California.  All rights reserved.\n";
26#endif
27
28#ifdef HAVE_CONFIG_H
29#include "config.h"
30#endif
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <stdarg.h>
36#include <unistd.h>
37#include <fcntl.h>
38#include <errno.h>
39#include <arpa/inet.h>
40#include <sys/types.h>
41#include <sys/stat.h>
42
43#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
44/* BSD-flavored OS - use BPF */
45#define USE_BPF
46#elif defined(linux)
47/* Linux - use socket filters */
48#define USE_SOCKET_FILTERS
49#else
50#error "Unknown platform or platform that doesn't support Valgrind"
51#endif
52
53#if defined(USE_BPF)
54
55#include <sys/ioctl.h>
56#include <net/bpf.h>
57
58/*
59 * Make "pcap.h" not include "pcap/bpf.h"; we are going to include the
60 * native OS version, as we're going to be doing our own ioctls to
61 * make sure that, in the uninitialized-data tests, the filters aren't
62 * checked by libpcap before being handed to BPF.
63 */
64#define PCAP_DONT_INCLUDE_PCAP_BPF_H
65
66#elif defined(USE_SOCKET_FILTERS)
67
68#include <sys/socket.h>
69#include <linux/types.h>
70#include <linux/filter.h>
71
72#endif
73
74#include <pcap.h>
75#ifndef HAVE___ATTRIBUTE__
76#define __attribute__(x)
77#endif
78
79static char *program_name;
80
81/* Forwards */
82static void usage(void) __attribute__((noreturn));
83static void error(const char *, ...)
84    __attribute__((noreturn, format (printf, 1, 2)));
85static void warning(const char *, ...)
86    __attribute__((format (printf, 1, 2)));
87
88extern int optind;
89extern int opterr;
90extern char *optarg;
91
92/*
93 * On Windows, we need to open the file in binary mode, so that
94 * we get all the bytes specified by the size we get from "fstat()".
95 * On UNIX, that's not necessary.  O_BINARY is defined on Windows;
96 * we define it as 0 if it's not defined, so it does nothing.
97 */
98#ifndef O_BINARY
99#define O_BINARY	0
100#endif
101
102static char *
103read_infile(char *fname)
104{
105	register int i, fd, cc;
106	register char *cp;
107	struct stat buf;
108
109	fd = open(fname, O_RDONLY|O_BINARY);
110	if (fd < 0)
111		error("can't open %s: %s", fname, pcap_strerror(errno));
112
113	if (fstat(fd, &buf) < 0)
114		error("can't stat %s: %s", fname, pcap_strerror(errno));
115
116	cp = malloc((u_int)buf.st_size + 1);
117	if (cp == NULL)
118		error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
119			fname, pcap_strerror(errno));
120	cc = read(fd, cp, (u_int)buf.st_size);
121	if (cc < 0)
122		error("read %s: %s", fname, pcap_strerror(errno));
123	if (cc != buf.st_size)
124		error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
125
126	close(fd);
127	/* replace "# comment" with spaces */
128	for (i = 0; i < cc; i++) {
129		if (cp[i] == '#')
130			while (i < cc && cp[i] != '\n')
131				cp[i++] = ' ';
132	}
133	cp[cc] = '\0';
134	return (cp);
135}
136
137/* VARARGS */
138static void
139error(const char *fmt, ...)
140{
141	va_list ap;
142
143	(void)fprintf(stderr, "%s: ", program_name);
144	va_start(ap, fmt);
145	(void)vfprintf(stderr, fmt, ap);
146	va_end(ap);
147	if (*fmt) {
148		fmt += strlen(fmt);
149		if (fmt[-1] != '\n')
150			(void)fputc('\n', stderr);
151	}
152	exit(1);
153	/* NOTREACHED */
154}
155
156/* VARARGS */
157static void
158warning(const char *fmt, ...)
159{
160	va_list ap;
161
162	(void)fprintf(stderr, "%s: WARNING: ", program_name);
163	va_start(ap, fmt);
164	(void)vfprintf(stderr, fmt, ap);
165	va_end(ap);
166	if (*fmt) {
167		fmt += strlen(fmt);
168		if (fmt[-1] != '\n')
169			(void)fputc('\n', stderr);
170	}
171}
172
173/*
174 * Copy arg vector into a new buffer, concatenating arguments with spaces.
175 */
176static char *
177copy_argv(register char **argv)
178{
179	register char **p;
180	register u_int len = 0;
181	char *buf;
182	char *src, *dst;
183
184	p = argv;
185	if (*p == 0)
186		return 0;
187
188	while (*p)
189		len += strlen(*p++) + 1;
190
191	buf = (char *)malloc(len);
192	if (buf == NULL)
193		error("copy_argv: malloc");
194
195	p = argv;
196	dst = buf;
197	while ((src = *p++) != NULL) {
198		while ((*dst++ = *src++) != '\0')
199			;
200		dst[-1] = ' ';
201	}
202	dst[-1] = '\0';
203
204	return buf;
205}
206
207#define INSN_COUNT	17
208
209int
210main(int argc, char **argv)
211{
212	char *cp, *device;
213	int op;
214	int dorfmon, useactivate;
215	char ebuf[PCAP_ERRBUF_SIZE];
216	char *infile;
217	char *cmdbuf;
218	pcap_t *pd;
219	int status = 0;
220	int pcap_fd;
221#if defined(USE_BPF)
222	struct bpf_program bad_fcode;
223	struct bpf_insn uninitialized[INSN_COUNT];
224#elif defined(USE_SOCKET_FILTERS)
225	struct sock_fprog bad_fcode;
226	struct sock_filter uninitialized[INSN_COUNT];
227#endif
228	struct bpf_program fcode;
229
230	device = NULL;
231	dorfmon = 0;
232	useactivate = 0;
233	infile = NULL;
234
235	if ((cp = strrchr(argv[0], '/')) != NULL)
236		program_name = cp + 1;
237	else
238		program_name = argv[0];
239
240	opterr = 0;
241	while ((op = getopt(argc, argv, "aF:i:I")) != -1) {
242		switch (op) {
243
244		case 'a':
245			useactivate = 1;
246			break;
247
248		case 'F':
249			infile = optarg;
250			break;
251
252		case 'i':
253			device = optarg;
254			break;
255
256		case 'I':
257			dorfmon = 1;
258			useactivate = 1;	/* required for rfmon */
259			break;
260
261		default:
262			usage();
263			/* NOTREACHED */
264		}
265	}
266
267	if (device == NULL) {
268		/*
269		 * No interface specified; get whatever pcap_lookupdev()
270		 * finds.
271		 */
272		device = pcap_lookupdev(ebuf);
273		if (device == NULL) {
274			error("couldn't find interface to use: %s",
275			    ebuf);
276		}
277	}
278
279	if (infile != NULL) {
280		/*
281		 * Filter specified with "-F" and a file containing
282		 * a filter.
283		 */
284		cmdbuf = read_infile(infile);
285	} else {
286		if (optind < argc) {
287			/*
288			 * Filter specified with arguments on the
289			 * command line.
290			 */
291			cmdbuf = copy_argv(&argv[optind+1]);
292		} else {
293			/*
294			 * No filter specified; use an empty string, which
295			 * compiles to an "accept all" filter.
296			 */
297			cmdbuf = "";
298		}
299	}
300
301	if (useactivate) {
302		pd = pcap_create(device, ebuf);
303		if (pd == NULL)
304			error("%s: pcap_create() failed: %s", device, ebuf);
305		status = pcap_set_snaplen(pd, 65535);
306		if (status != 0)
307			error("%s: pcap_set_snaplen failed: %s",
308			    device, pcap_statustostr(status));
309		status = pcap_set_promisc(pd, 1);
310		if (status != 0)
311			error("%s: pcap_set_promisc failed: %s",
312			    device, pcap_statustostr(status));
313		if (dorfmon) {
314			status = pcap_set_rfmon(pd, 1);
315			if (status != 0)
316				error("%s: pcap_set_rfmon failed: %s",
317				    device, pcap_statustostr(status));
318		}
319		status = pcap_set_timeout(pd, 1000);
320		if (status != 0)
321			error("%s: pcap_set_timeout failed: %s",
322			    device, pcap_statustostr(status));
323		status = pcap_activate(pd);
324		if (status < 0) {
325			/*
326			 * pcap_activate() failed.
327			 */
328			error("%s: %s\n(%s)", device,
329			    pcap_statustostr(status), pcap_geterr(pd));
330		} else if (status > 0) {
331			/*
332			 * pcap_activate() succeeded, but it's warning us
333			 * of a problem it had.
334			 */
335			warning("%s: %s\n(%s)", device,
336			    pcap_statustostr(status), pcap_geterr(pd));
337		}
338	} else {
339		*ebuf = '\0';
340		pd = pcap_open_live(device, 65535, 1, 1000, ebuf);
341		if (pd == NULL)
342			error("%s", ebuf);
343		else if (*ebuf)
344			warning("%s", ebuf);
345	}
346
347	pcap_fd = pcap_fileno(pd);
348
349	/*
350	 * Try setting a filter with an uninitialized bpf_program
351	 * structure.  This should cause valgrind to report a
352	 * problem.
353	 *
354	 * We don't check for errors, because it could get an
355	 * error due to a bad pointer or count.
356	 */
357#if defined(USE_BPF)
358	ioctl(pcap_fd, BIOCSETF, &bad_fcode);
359#elif defined(USE_SOCKET_FILTERS)
360	setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
361	    sizeof(bad_fcode));
362#endif
363
364	/*
365	 * Try setting a filter with an initialized bpf_program
366	 * structure that points to an uninitialized program.
367	 * That should also cause valgrind to report a problem.
368	 *
369	 * We don't check for errors, because it could get an
370	 * error due to a bad pointer or count.
371	 */
372#if defined(USE_BPF)
373	bad_fcode.bf_len = INSN_COUNT;
374	bad_fcode.bf_insns = uninitialized;
375	ioctl(pcap_fd, BIOCSETF, &bad_fcode);
376#elif defined(USE_SOCKET_FILTERS)
377	bad_fcode.len = INSN_COUNT;
378	bad_fcode.filter = uninitialized;
379	setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
380	    sizeof(bad_fcode));
381#endif
382
383	/*
384	 * Now compile a filter and set the filter with that.
385	 * That should *not* cause valgrind to report a
386	 * problem.
387	 */
388	if (pcap_compile(pd, &fcode, cmdbuf, 1, 0) < 0)
389		error("can't compile filter: %s", pcap_geterr(pd));
390	if (pcap_setfilter(pd, &fcode) < 0)
391		error("can't set filter: %s", pcap_geterr(pd));
392
393	pcap_close(pd);
394	exit(status < 0 ? 1 : 0);
395}
396
397static void
398usage(void)
399{
400	(void)fprintf(stderr, "%s, with %s\n", program_name,
401	    pcap_lib_version());
402	(void)fprintf(stderr,
403	    "Usage: %s [-aI] [ -F file ] [ -I interface ] [ expression ]\n",
404	    program_name);
405	exit(1);
406}
407