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
  76 static char *program_name;
  77
  78 /*
  79  * This was introduced by Clang:
  80  *
  81  *     http://clang.llvm.org/docs/LanguageExtensions.html#has-attribute
  82  *
  83  * in some version (which version?); it has been picked up by GCC 5.0.
  84  */
  85 #ifndef __has_attribute
  86   /*
  87    * It's a macro, so you can check whether it's defined to check
  88    * whether it's supported.
  89    *
  90    * If it's not, define it to always return 0, so that we move on to
  91    * the fallback checks.
  92    */
  93   #define __has_attribute(x) 0
  94 #endif
  95
  96 #if __has_attribute(noreturn) \
  97     || (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)) \
  98     || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)) \
  99     || (defined(__xlC__) && __xlC__ >= 0x0A01) \
 100     || (defined(__HP_aCC) && __HP_aCC >= 61000)
 101   /*
 102    * Compiler with support for it, or GCC 2.5 and later, or Solaris Studio 12
 103    * (Sun C 5.9) and later, or IBM XL C 10.1 and later (do any earlier
 104    * versions of XL C support this?), or HP aCC A.06.10 and later.
 105    */
 106   #define PCAP_NORETURN __attribute((noreturn))
 107 #elif defined( _MSC_VER )
 108   #define PCAP_NORETURN __declspec(noreturn)
 109 #else
 110   #define PCAP_NORETURN
 111 #endif
 112
 113 #if __has_attribute(__format__) \
 114     || (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 203)) \
 115     || (defined(__xlC__) && __xlC__ >= 0x0A01) \
 116     || (defined(__HP_aCC) && __HP_aCC >= 61000)
 117   /*
 118    * Compiler with support for it, or GCC 2.3 and later, or IBM XL C 10.1
 119    * and later (do any earlier versions of XL C support this?),
 120    * or HP aCC A.06.10 and later.
 121    */
 122   #define PCAP_PRINTFLIKE(x,y) __attribute__((__format__(__printf__,x,y)))
 123 #else
 124   #define PCAP_PRINTFLIKE(x,y)
 125 #endif
 126
 127 /* Forwards */
 128 static void PCAP_NORETURN usage(void);
 129 static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
 130 static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
 131
 132 /*
 133  * On Windows, we need to open the file in binary mode, so that
 134  * we get all the bytes specified by the size we get from "fstat()".
 135  * On UNIX, that's not necessary.  O_BINARY is defined on Windows;
 136  * we define it as 0 if it's not defined, so it does nothing.
 137  */
 138 #ifndef O_BINARY
 139 #define O_BINARY        0
 140 #endif
 141
 142 static char *
 143 read_infile(char *fname)
 144 {
 145         register int i, fd, cc;
 146         register char *cp;
 147         struct stat buf;
 148
 149         fd = open(fname, O_RDONLY|O_BINARY);
 150         if (fd < 0)
 151                 error("can't open %s: %s", fname, pcap_strerror(errno));
 152
 153         if (fstat(fd, &buf) < 0)
 154                 error("can't stat %s: %s", fname, pcap_strerror(errno));
 155
 156         cp = malloc((u_int)buf.st_size + 1);
 157         if (cp == NULL)
 158                 error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
 159                         fname, pcap_strerror(errno));
 160         cc = read(fd, cp, (u_int)buf.st_size);
 161         if (cc < 0)
 162                 error("read %s: %s", fname, pcap_strerror(errno));
 163         if (cc != buf.st_size)
 164                 error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
 165
 166         close(fd);
 167         /* replace "# comment" with spaces */
 168         for (i = 0; i < cc; i++) {
 169                 if (cp[i] == '#')
 170                         while (i < cc && cp[i] != '\n')
 171                                 cp[i++] = ' ';
 172         }
 173         cp[cc] = '\0';
 174         return (cp);
 175 }
 176
 177 /* VARARGS */
 178 static void
 179 error(const char *fmt, ...)
 180 {
 181         va_list ap;
 182
 183         (void)fprintf(stderr, "%s: ", program_name);
 184         va_start(ap, fmt);
 185         (void)vfprintf(stderr, fmt, ap);
 186         va_end(ap);
 187         if (*fmt) {
 188                 fmt += strlen(fmt);
 189                 if (fmt[-1] != '\n')
 190                         (void)fputc('\n', stderr);
 191         }
 192         exit(1);
 193         /* NOTREACHED */
 194 }
 195
 196 /* VARARGS */
 197 static void
 198 warning(const char *fmt, ...)
 199 {
 200         va_list ap;
 201
 202         (void)fprintf(stderr, "%s: WARNING: ", program_name);
 203         va_start(ap, fmt);
 204         (void)vfprintf(stderr, fmt, ap);
 205         va_end(ap);
 206         if (*fmt) {
 207                 fmt += strlen(fmt);
 208                 if (fmt[-1] != '\n')
 209                         (void)fputc('\n', stderr);
 210         }
 211 }
 212
 213 /*
 214  * Copy arg vector into a new buffer, concatenating arguments with spaces.
 215  */
 216 static char *
 217 copy_argv(register char **argv)
 218 {
 219         register char **p;
 220         register u_int len = 0;
 221         char *buf;
 222         char *src, *dst;
 223
 224         p = argv;
 225         if (*p == 0)
 226                 return 0;
 227
 228         while (*p)
 229                 len += strlen(*p++) + 1;
 230
 231         buf = (char *)malloc(len);
 232         if (buf == NULL)
 233                 error("copy_argv: malloc");
 234
 235         p = argv;
 236         dst = buf;
 237         while ((src = *p++) != NULL) {
 238                 while ((*dst++ = *src++) != '\0')
 239                         ;
 240                 dst[-1] = ' ';
 241         }
 242         dst[-1] = '\0';
 243
 244         return buf;
 245 }
 246
 247 #define INSN_COUNT      17
 248
 249 int
 250 main(int argc, char **argv)
 251 {
 252         char *cp, *device;
 253         int op;
 254         int dorfmon, useactivate;
 255         char ebuf[PCAP_ERRBUF_SIZE];
 256         char *infile;
 257         char *cmdbuf;
 258         pcap_t *pd;
 259         int status = 0;
 260         int pcap_fd;
 261 #if defined(USE_BPF)
 262         struct bpf_program bad_fcode;
 263         struct bpf_insn uninitialized[INSN_COUNT];
 264 #elif defined(USE_SOCKET_FILTERS)
 265         struct sock_fprog bad_fcode;
 266         struct sock_filter uninitialized[INSN_COUNT];
 267 #endif
 268         struct bpf_program fcode;
 269
 270         device = NULL;
 271         dorfmon = 0;
 272         useactivate = 0;
 273         infile = NULL;
 274
 275         if ((cp = strrchr(argv[0], '/')) != NULL)
 276                 program_name = cp + 1;
 277         else
 278                 program_name = argv[0];
 279
 280         opterr = 0;
 281         while ((op = getopt(argc, argv, "aF:i:I")) != -1) {
 282                 switch (op) {
 283
 284                 case 'a':
 285                         useactivate = 1;
 286                         break;
 287
 288                 case 'F':
 289                         infile = optarg;
 290                         break;
 291
 292                 case 'i':
 293                         device = optarg;
 294                         break;
 295
 296                 case 'I':
 297                         dorfmon = 1;
 298                         useactivate = 1;        /* required for rfmon */
 299                         break;
 300
 301                 default:
 302                         usage();
 303                         /* NOTREACHED */
 304                 }
 305         }
 306
 307         if (device == NULL) {
 308                 /*
 309                  * No interface specified; get whatever pcap_lookupdev()
 310                  * finds.
 311                  */
 312                 device = pcap_lookupdev(ebuf);
 313                 if (device == NULL) {
 314                         error("couldn't find interface to use: %s",
 315                             ebuf);
 316                 }
 317         }
 318
 319         if (infile != NULL) {
 320                 /*
 321                  * Filter specified with "-F" and a file containing
 322                  * a filter.
 323                  */
 324                 cmdbuf = read_infile(infile);
 325         } else {
 326                 if (optind < argc) {
 327                         /*
 328                          * Filter specified with arguments on the
 329                          * command line.
 330                          */
 331                         cmdbuf = copy_argv(&argv[optind+1]);
 332                 } else {
 333                         /*
 334                          * No filter specified; use an empty string, which
 335                          * compiles to an "accept all" filter.
 336                          */
 337                         cmdbuf = "";
 338                 }
 339         }
 340
 341         if (useactivate) {
 342                 pd = pcap_create(device, ebuf);
 343                 if (pd == NULL)
 344                         error("%s: pcap_create() failed: %s", device, ebuf);
 345                 status = pcap_set_snaplen(pd, 65535);
 346                 if (status != 0)
 347                         error("%s: pcap_set_snaplen failed: %s",
 348                             device, pcap_statustostr(status));
 349                 status = pcap_set_promisc(pd, 1);
 350                 if (status != 0)
 351                         error("%s: pcap_set_promisc failed: %s",
 352                             device, pcap_statustostr(status));
 353                 if (dorfmon) {
 354                         status = pcap_set_rfmon(pd, 1);
 355                         if (status != 0)
 356                                 error("%s: pcap_set_rfmon failed: %s",
 357                                     device, pcap_statustostr(status));
 358                 }
 359                 status = pcap_set_timeout(pd, 1000);
 360                 if (status != 0)
 361                         error("%s: pcap_set_timeout failed: %s",
 362                             device, pcap_statustostr(status));
 363                 status = pcap_activate(pd);
 364                 if (status < 0) {
 365                         /*
 366                          * pcap_activate() failed.
 367                          */
 368                         error("%s: %s\n(%s)", device,
 369                             pcap_statustostr(status), pcap_geterr(pd));
 370                 } else if (status > 0) {
 371                         /*
 372                          * pcap_activate() succeeded, but it's warning us
 373                          * of a problem it had.
 374                          */
 375                         warning("%s: %s\n(%s)", device,
 376                             pcap_statustostr(status), pcap_geterr(pd));
 377                 }
 378         } else {
 379                 *ebuf = '\0';
 380                 pd = pcap_open_live(device, 65535, 1, 1000, ebuf);
 381                 if (pd == NULL)
 382                         error("%s", ebuf);
 383                 else if (*ebuf)
 384                         warning("%s", ebuf);
 385         }
 386
 387         pcap_fd = pcap_fileno(pd);
 388
 389         /*
 390          * Try setting a filter with an uninitialized bpf_program
 391          * structure.  This should cause valgrind to report a
 392          * problem.
 393          *
 394          * We don't check for errors, because it could get an
 395          * error due to a bad pointer or count.
 396          */
 397 #if defined(USE_BPF)
 398         ioctl(pcap_fd, BIOCSETF, &bad_fcode);
 399 #elif defined(USE_SOCKET_FILTERS)
 400         setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
 401             sizeof(bad_fcode));
 402 #endif
 403
 404         /*
 405          * Try setting a filter with an initialized bpf_program
 406          * structure that points to an uninitialized program.
 407          * That should also cause valgrind to report a problem.
 408          *
 409          * We don't check for errors, because it could get an
 410          * error due to a bad pointer or count.
 411          */
 412 #if defined(USE_BPF)
 413         bad_fcode.bf_len = INSN_COUNT;
 414         bad_fcode.bf_insns = uninitialized;
 415         ioctl(pcap_fd, BIOCSETF, &bad_fcode);
 416 #elif defined(USE_SOCKET_FILTERS)
 417         bad_fcode.len = INSN_COUNT;
 418         bad_fcode.filter = uninitialized;
 419         setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
 420             sizeof(bad_fcode));
 421 #endif
 422
 423         /*
 424          * Now compile a filter and set the filter with that.
 425          * That should *not* cause valgrind to report a
 426          * problem.
 427          */
 428         if (pcap_compile(pd, &fcode, cmdbuf, 1, 0) < 0)
 429                 error("can't compile filter: %s", pcap_geterr(pd));
 430         if (pcap_setfilter(pd, &fcode) < 0)
 431                 error("can't set filter: %s", pcap_geterr(pd));
 432
 433         pcap_close(pd);
 434         exit(status < 0 ? 1 : 0);
 435 }
 436
 437 static void
 438 usage(void)
 439 {
 440         (void)fprintf(stderr, "%s, with %s\n", program_name,
 441             pcap_lib_version());
 442         (void)fprintf(stderr,
 443             "Usage: %s [-aI] [ -F file ] [ -I interface ] [ expression ]\n",
 444             program_name);
 445         exit(1);
 446 }