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 #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
  79 static char *program_name;
  80
  81 /* Forwards */
  82 static void usage(void) __attribute__((noreturn));
  83 static void error(const char *, ...)
  84     __attribute__((noreturn, format (printf, 1, 2)));
  85 static void warning(const char *, ...)
  86     __attribute__((format (printf, 1, 2)));
  87
  88 extern int optind;
  89 extern int opterr;
  90 extern 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
 102 static char *
 103 read_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 */
 138 static void
 139 error(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 */
 157 static void
 158 warning(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  */
 176 static char *
 177 copy_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
 209 int
 210 main(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
 397 static void
 398 usage(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 }