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