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.
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
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.
25 * This doesn't actually test libpcap itself; it tests whether
26 * valgrind properly handles the APIs libpcap uses. If it doesn't,
27 * we end up getting patches submitted to "fix" references that
28 * valgrind claims are being made to uninitialized data, when, in
29 * fact, the OS isn't making any such references - or we get
30 * valgrind *not* detecting *actual* incorrect references.
32 * Both BPF and Linux socket filters aren't handled correctly
33 * by some versions of valgrind. See valgrind bug 318203 for
36 * https://bugs.kde.org/show_bug.cgi?id=318203
38 * and valgrind bug 312989 for macOS:
40 * https://bugs.kde.org/show_bug.cgi?id=312989
42 * The fixes for both of those are checked into the official valgrind
45 * The unofficial FreeBSD port has similar issues to the official macOS
46 * port, for similar reasons.
49 static const char copyright[] _U_ =
50 "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
51 The Regents of the University of California. All rights reserved.\n";
65 #include <arpa/inet.h>
66 #include <sys/types.h>
69 #include "pcap/funcattrs.h"
71 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(_AIX) || defined(sun)
72 /* OS with BPF - use BPF */
75 /* Linux - use socket filters */
76 #define USE_SOCKET_FILTERS
78 #error "Unknown platform or platform that doesn't support Valgrind"
83 #include <sys/ioctl.h>
87 * Make "pcap.h" not include "pcap/bpf.h"; we are going to include the
88 * native OS version, as we're going to be doing our own ioctls to
89 * make sure that, in the uninitialized-data tests, the filters aren't
90 * checked by libpcap before being handed to BPF.
92 #define PCAP_DONT_INCLUDE_PCAP_BPF_H
94 #elif defined(USE_SOCKET_FILTERS)
96 #include <sys/socket.h>
97 #include <linux/types.h>
98 #include <linux/filter.h>
104 static char *program_name;
107 static void PCAP_NORETURN usage(void);
108 static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
109 static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
112 * On Windows, we need to open the file in binary mode, so that
113 * we get all the bytes specified by the size we get from "fstat()".
114 * On UNIX, that's not necessary. O_BINARY is defined on Windows;
115 * we define it as 0 if it's not defined, so it does nothing.
122 read_infile(char *fname)
124 register int i, fd, cc;
128 fd = open(fname, O_RDONLY|O_BINARY);
130 error("can't open %s: %s", fname, pcap_strerror(errno));
132 if (fstat(fd, &buf) < 0)
133 error("can't stat %s: %s", fname, pcap_strerror(errno));
135 cp = malloc((u_int)buf.st_size + 1);
137 error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
138 fname, pcap_strerror(errno));
139 cc = read(fd, cp, (u_int)buf.st_size);
141 error("read %s: %s", fname, pcap_strerror(errno));
142 if (cc != buf.st_size)
143 error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
146 /* replace "# comment" with spaces */
147 for (i = 0; i < cc; i++) {
149 while (i < cc && cp[i] != '\n')
158 error(const char *fmt, ...)
162 (void)fprintf(stderr, "%s: ", program_name);
164 (void)vfprintf(stderr, fmt, ap);
169 (void)fputc('\n', stderr);
177 warning(const char *fmt, ...)
181 (void)fprintf(stderr, "%s: WARNING: ", program_name);
183 (void)vfprintf(stderr, fmt, ap);
188 (void)fputc('\n', stderr);
193 * Copy arg vector into a new buffer, concatenating arguments with spaces.
196 copy_argv(register char **argv)
199 register u_int len = 0;
208 len += strlen(*p++) + 1;
210 buf = (char *)malloc(len);
212 error("copy_argv: malloc");
216 while ((src = *p++) != NULL) {
217 while ((*dst++ = *src++) != '\0')
226 #define INSN_COUNT 17
229 main(int argc, char **argv)
233 int dorfmon, useactivate;
234 char ebuf[PCAP_ERRBUF_SIZE];
242 struct bpf_program bad_fcode;
243 struct bpf_insn uninitialized[INSN_COUNT];
244 #elif defined(USE_SOCKET_FILTERS)
245 struct sock_fprog bad_fcode;
246 struct sock_filter uninitialized[INSN_COUNT];
248 struct bpf_program fcode;
255 if ((cp = strrchr(argv[0], '/')) != NULL)
256 program_name = cp + 1;
258 program_name = argv[0];
261 while ((op = getopt(argc, argv, "aF:i:I")) != -1) {
278 useactivate = 1; /* required for rfmon */
287 if (device == NULL) {
289 * No interface specified; get whatever pcap_lookupdev()
292 if (pcap_findalldevs(&devlist, ebuf) == -1)
295 error("no interfaces available for capture");
296 device = strdup(devlist->name);
297 pcap_freealldevs(devlist);
300 if (infile != NULL) {
302 * Filter specified with "-F" and a file containing
305 cmdbuf = read_infile(infile);
309 * Filter specified with arguments on the
312 cmdbuf = copy_argv(&argv[optind+1]);
315 * No filter specified; use an empty string, which
316 * compiles to an "accept all" filter.
323 pd = pcap_create(device, ebuf);
325 error("%s: pcap_create() failed: %s", device, ebuf);
326 status = pcap_set_snaplen(pd, 65535);
328 error("%s: pcap_set_snaplen failed: %s",
329 device, pcap_statustostr(status));
330 status = pcap_set_promisc(pd, 1);
332 error("%s: pcap_set_promisc failed: %s",
333 device, pcap_statustostr(status));
335 status = pcap_set_rfmon(pd, 1);
337 error("%s: pcap_set_rfmon failed: %s",
338 device, pcap_statustostr(status));
340 status = pcap_set_timeout(pd, 1000);
342 error("%s: pcap_set_timeout failed: %s",
343 device, pcap_statustostr(status));
344 status = pcap_activate(pd);
347 * pcap_activate() failed.
349 error("%s: %s\n(%s)", device,
350 pcap_statustostr(status), pcap_geterr(pd));
351 } else if (status > 0) {
353 * pcap_activate() succeeded, but it's warning us
354 * of a problem it had.
356 warning("%s: %s\n(%s)", device,
357 pcap_statustostr(status), pcap_geterr(pd));
361 pd = pcap_open_live(device, 65535, 1, 1000, ebuf);
368 pcap_fd = pcap_fileno(pd);
371 * Try setting a filter with an uninitialized bpf_program
372 * structure. This should cause valgrind to report a
375 * We don't check for errors, because it could get an
376 * error due to a bad pointer or count.
379 ioctl(pcap_fd, BIOCSETF, &bad_fcode);
380 #elif defined(USE_SOCKET_FILTERS)
381 setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
386 * Try setting a filter with an initialized bpf_program
387 * structure that points to an uninitialized program.
388 * That should also cause valgrind to report a problem.
390 * We don't check for errors, because it could get an
391 * error due to a bad pointer or count.
394 bad_fcode.bf_len = INSN_COUNT;
395 bad_fcode.bf_insns = uninitialized;
396 ioctl(pcap_fd, BIOCSETF, &bad_fcode);
397 #elif defined(USE_SOCKET_FILTERS)
398 bad_fcode.len = INSN_COUNT;
399 bad_fcode.filter = uninitialized;
400 setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
405 * Now compile a filter and set the filter with that.
406 * That should *not* cause valgrind to report a
409 if (pcap_compile(pd, &fcode, cmdbuf, 1, 0) < 0)
410 error("can't compile filter: %s", pcap_geterr(pd));
411 if (pcap_setfilter(pd, &fcode) < 0)
412 error("can't set filter: %s", pcap_geterr(pd));
415 exit(status < 0 ? 1 : 0);
421 (void)fprintf(stderr, "%s, with %s\n", program_name,
423 (void)fprintf(stderr,
424 "Usage: %s [-aI] [ -F file ] [ -I interface ] [ expression ]\n",