The Tcpdump Group git mirrors - libpcap/blob - tests/valgrindtest.c

   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
  23 static const char copyright[] _U_ =
  24     "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
  25 The Regents of the University of California.  All rights reserved.\n";
  26 static const char rcsid[] _U_ =
  27     "@(#) $Header: /tcpdump/master/libpcap/filtertest.c,v 1.2 2005-08-08 17:50:13 guy Exp $ (LBL)";
  28 #endif
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <stdarg.h>
  38 #include <unistd.h>
  39 #include <fcntl.h>
  40 #include <errno.h>
  41 #include <arpa/inet.h>
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44
  45 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
  46 /* BSD-flavored OS - use BPF */
  47 #define USE_BPF
  48 #elif defined(linux)
  49 /* Linux - use socket filters */
  50 #define USE_SOCKET_FILTERS
  51 #else
  52 #error "Unknown platform or platform that doesn't support Valgrind"
  53 #endif
  54
  55 #if defined(USE_BPF)
  56
  57 #include <sys/ioctl.h>
  58 #include <net/bpf.h>
  59
  60 /*
  61  * Make "pcap.h" not include "pcap/bpf.h"; we are going to include the
  62  * native OS version, as we're going to be doing our own ioctls to
  63  * make sure that, in the uninitialized-data tests, the filters aren't
  64  * checked by libpcap before being handed to BPF.
  65  */
  66 #define PCAP_DONT_INCLUDE_PCAP_BPF_H
  67
  68 #elif defined(USE_SOCKET_FILTERS)
  69
  70 #include <sys/socket.h>
  71 #include <linux/types.h>
  72 #include <linux/filter.h>
  73
  74 #endif
  75
  76 #include <pcap.h>
  77 #ifndef HAVE___ATTRIBUTE__
  78 #define __attribute__(x)
  79 #endif
  80
  81 static char *program_name;
  82
  83 /* Forwards */
  84 static void usage(void) __attribute__((noreturn));
  85 static void error(const char *, ...)
  86     __attribute__((noreturn, format (printf, 1, 2)));
  87 static void warning(const char *, ...)
  88     __attribute__((format (printf, 1, 2)));
  89
  90 extern int optind;
  91 extern int opterr;
  92 extern char *optarg;
  93
  94 /*
  95  * On Windows, we need to open the file in binary mode, so that
  96  * we get all the bytes specified by the size we get from "fstat()".
  97  * On UNIX, that's not necessary.  O_BINARY is defined on Windows;
  98  * we define it as 0 if it's not defined, so it does nothing.
  99  */
 100 #ifndef O_BINARY
 101 #define O_BINARY        0
 102 #endif
 103
 104 static char *
 105 read_infile(char *fname)
 106 {
 107         register int i, fd, cc;
 108         register char *cp;
 109         struct stat buf;
 110
 111         fd = open(fname, O_RDONLY|O_BINARY);
 112         if (fd < 0)
 113                 error("can't open %s: %s", fname, pcap_strerror(errno));
 114
 115         if (fstat(fd, &buf) < 0)
 116                 error("can't stat %s: %s", fname, pcap_strerror(errno));
 117
 118         cp = malloc((u_int)buf.st_size + 1);
 119         if (cp == NULL)
 120                 error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
 121                         fname, pcap_strerror(errno));
 122         cc = read(fd, cp, (u_int)buf.st_size);
 123         if (cc < 0)
 124                 error("read %s: %s", fname, pcap_strerror(errno));
 125         if (cc != buf.st_size)
 126                 error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
 127
 128         close(fd);
 129         /* replace "# comment" with spaces */
 130         for (i = 0; i < cc; i++) {
 131                 if (cp[i] == '#')
 132                         while (i < cc && cp[i] != '\n')
 133                                 cp[i++] = ' ';
 134         }
 135         cp[cc] = '\0';
 136         return (cp);
 137 }
 138
 139 /* VARARGS */
 140 static void
 141 error(const char *fmt, ...)
 142 {
 143         va_list ap;
 144
 145         (void)fprintf(stderr, "%s: ", program_name);
 146         va_start(ap, fmt);
 147         (void)vfprintf(stderr, fmt, ap);
 148         va_end(ap);
 149         if (*fmt) {
 150                 fmt += strlen(fmt);
 151                 if (fmt[-1] != '\n')
 152                         (void)fputc('\n', stderr);
 153         }
 154         exit(1);
 155         /* NOTREACHED */
 156 }
 157
 158 /* VARARGS */
 159 static void
 160 warning(const char *fmt, ...)
 161 {
 162         va_list ap;
 163
 164         (void)fprintf(stderr, "%s: WARNING: ", program_name);
 165         va_start(ap, fmt);
 166         (void)vfprintf(stderr, fmt, ap);
 167         va_end(ap);
 168         if (*fmt) {
 169                 fmt += strlen(fmt);
 170                 if (fmt[-1] != '\n')
 171                         (void)fputc('\n', stderr);
 172         }
 173 }
 174
 175 /*
 176  * Copy arg vector into a new buffer, concatenating arguments with spaces.
 177  */
 178 static char *
 179 copy_argv(register char **argv)
 180 {
 181         register char **p;
 182         register u_int len = 0;
 183         char *buf;
 184         char *src, *dst;
 185
 186         p = argv;
 187         if (*p == 0)
 188                 return 0;
 189
 190         while (*p)
 191                 len += strlen(*p++) + 1;
 192
 193         buf = (char *)malloc(len);
 194         if (buf == NULL)
 195                 error("copy_argv: malloc");
 196
 197         p = argv;
 198         dst = buf;
 199         while ((src = *p++) != NULL) {
 200                 while ((*dst++ = *src++) != '\0')
 201                         ;
 202                 dst[-1] = ' ';
 203         }
 204         dst[-1] = '\0';
 205
 206         return buf;
 207 }
 208
 209 #define INSN_COUNT      17
 210
 211 int
 212 main(int argc, char **argv)
 213 {
 214         char *cp, *device;
 215         int op;
 216         int dorfmon, useactivate;
 217         char ebuf[PCAP_ERRBUF_SIZE];
 218         char *infile;
 219         char *cmdbuf;
 220         pcap_t *pd;
 221         int status = 0;
 222         int pcap_fd;
 223 #if defined(USE_BPF)
 224         struct bpf_program bad_fcode;
 225         struct bpf_insn uninitialized[INSN_COUNT];
 226 #elif defined(USE_SOCKET_FILTERS)
 227         struct sock_fprog bad_fcode;
 228         struct sock_filter uninitialized[INSN_COUNT];
 229 #endif
 230         struct bpf_program fcode;
 231
 232         device = NULL;
 233         dorfmon = 0;
 234         useactivate = 0;
 235         infile = NULL;
 236
 237         if ((cp = strrchr(argv[0], '/')) != NULL)
 238                 program_name = cp + 1;
 239         else
 240                 program_name = argv[0];
 241
 242         opterr = 0;
 243         while ((op = getopt(argc, argv, "aF:i:I")) != -1) {
 244                 switch (op) {
 245
 246                 case 'a':
 247                         useactivate = 1;
 248                         break;
 249
 250                 case 'F':
 251                         infile = optarg;
 252                         break;
 253
 254                 case 'i':
 255                         device = optarg;
 256                         break;
 257
 258                 case 'I':
 259                         dorfmon = 1;
 260                         useactivate = 1;        /* required for rfmon */
 261                         break;
 262
 263                 default:
 264                         usage();
 265                         /* NOTREACHED */
 266                 }
 267         }
 268
 269         if (device == NULL) {
 270                 /*
 271                  * No interface specified; get whatever pcap_lookupdev()
 272                  * finds.
 273                  */
 274                 device = pcap_lookupdev(ebuf);
 275                 if (device == NULL) {
 276                         error("couldn't find interface to use: %s",
 277                             ebuf);
 278                 }
 279         }
 280
 281         if (infile != NULL) {
 282                 /*
 283                  * Filter specified with "-F" and a file containing
 284                  * a filter.
 285                  */
 286                 cmdbuf = read_infile(infile);
 287         } else {
 288                 if (optind < argc) {
 289                         /*
 290                          * Filter specified with arguments on the
 291                          * command line.
 292                          */
 293                         cmdbuf = copy_argv(&argv[optind+1]);
 294                 } else {
 295                         /*
 296                          * No filter specified; use an empty string, which
 297                          * compiles to an "accept all" filter.
 298                          */
 299                         cmdbuf = "";
 300                 }
 301         }
 302
 303         if (useactivate) {
 304                 pd = pcap_create(device, ebuf);
 305                 if (pd == NULL)
 306                         error("%s: pcap_create() failed: %s", device, ebuf);
 307                 status = pcap_set_snaplen(pd, 65535);
 308                 if (status != 0)
 309                         error("%s: pcap_set_snaplen failed: %s",
 310                             device, pcap_statustostr(status));
 311                 status = pcap_set_promisc(pd, 1);
 312                 if (status != 0)
 313                         error("%s: pcap_set_promisc failed: %s",
 314                             device, pcap_statustostr(status));
 315                 if (dorfmon) {
 316                         status = pcap_set_rfmon(pd, 1);
 317                         if (status != 0)
 318                                 error("%s: pcap_set_rfmon failed: %s",
 319                                     device, pcap_statustostr(status));
 320                 }
 321                 status = pcap_set_timeout(pd, 1000);
 322                 if (status != 0)
 323                         error("%s: pcap_set_timeout failed: %s",
 324                             device, pcap_statustostr(status));
 325                 status = pcap_activate(pd);
 326                 if (status < 0) {
 327                         /*
 328                          * pcap_activate() failed.
 329                          */
 330                         error("%s: %s\n(%s)", device,
 331                             pcap_statustostr(status), pcap_geterr(pd));
 332                 } else if (status > 0) {
 333                         /*
 334                          * pcap_activate() succeeded, but it's warning us
 335                          * of a problem it had.
 336                          */
 337                         warning("%s: %s\n(%s)", device,
 338                             pcap_statustostr(status), pcap_geterr(pd));
 339                 }
 340         } else {
 341                 *ebuf = '\0';
 342                 pd = pcap_open_live(device, 65535, 1, 1000, ebuf);
 343                 if (pd == NULL)
 344                         error("%s", ebuf);
 345                 else if (*ebuf)
 346                         warning("%s", ebuf);
 347         }
 348
 349         pcap_fd = pcap_fileno(pd);
 350
 351         /*
 352          * Try setting a filter with an uninitialized bpf_program
 353          * structure.  This should cause valgrind to report a
 354          * problem.
 355          *
 356          * We don't check for errors, because it could get an
 357          * error due to a bad pointer or count.
 358          */
 359 #if defined(USE_BPF)
 360         ioctl(pcap_fd, BIOCSETF, &bad_fcode);
 361 #elif defined(USE_SOCKET_FILTERS)
 362         setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
 363             sizeof(bad_fcode));
 364 #endif
 365
 366         /*
 367          * Try setting a filter with an initialized bpf_program
 368          * structure that points to an uninitialized program.
 369          * That should also cause valgrind to report a problem.
 370          *
 371          * We don't check for errors, because it could get an
 372          * error due to a bad pointer or count.
 373          */
 374 #if defined(USE_BPF)
 375         bad_fcode.bf_len = INSN_COUNT;
 376         bad_fcode.bf_insns = uninitialized;
 377         ioctl(pcap_fd, BIOCSETF, &bad_fcode);
 378 #elif defined(USE_SOCKET_FILTERS)
 379         bad_fcode.len = INSN_COUNT;
 380         bad_fcode.filter = uninitialized;
 381         setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
 382             sizeof(bad_fcode));
 383 #endif
 384
 385         /*
 386          * Now compile a filter and set the filter with that.
 387          * That should *not* cause valgrind to report a
 388          * problem.
 389          */
 390         if (pcap_compile(pd, &fcode, cmdbuf, 1, 0) < 0)
 391                 error("can't compile filter: %s", pcap_geterr(pd));
 392         if (pcap_setfilter(pd, &fcode) < 0)
 393                 error("can't set filter: %s", pcap_geterr(pd));
 394
 395         pcap_close(pd);
 396         exit(status < 0 ? 1 : 0);
 397 }
 398
 399 static void
 400 usage(void)
 401 {
 402         (void)fprintf(stderr, "%s, with %s\n", program_name,
 403             pcap_lib_version());
 404         (void)fprintf(stderr,
 405             "Usage: %s [-aI] [ -F file ] [ -I interface ] [ expression ]\n",
 406             program_name);
 407         exit(1);
 408 }