external/bsd/libpcap/dist/tests/valgrindtest.c

   1 /*      $NetBSD: valgrindtest.c,v 1.3 2015/03/31 21:39:43 christos Exp $        */
   2
   3 /*
   4  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23
  24 #ifndef lint
  25 static const char copyright[] _U_ =
  26     "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
  27 The Regents of the University of California.  All rights reserved.\n";
  28 #endif
  29
  30 #include <sys/cdefs.h>
  31 __RCSID("$NetBSD: valgrindtest.c,v 1.3 2015/03/31 21:39:43 christos Exp $");
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include "config.h"
  35 #endif
  36
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <stdarg.h>
  41 #include <unistd.h>
  42 #include <fcntl.h>
  43 #include <errno.h>
  44 #include <arpa/inet.h>
  45 #include <sys/types.h>
  46 #include <sys/stat.h>
  47
  48 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
  49 /* BSD-flavored OS - use BPF */
  50 #define USE_BPF
  51 #elif defined(linux)
  52 /* Linux - use socket filters */
  53 #define USE_SOCKET_FILTERS
  54 #else
  55 #error "Unknown platform or platform that doesn't support Valgrind"
  56 #endif
  57
  58 #if defined(USE_BPF)
  59
  60 #include <sys/ioctl.h>
  61 #include <net/bpf.h>
  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 #elif defined(USE_SOCKET_FILTERS)
  72
  73 #include <sys/socket.h>
  74 #include <linux/types.h>
  75 #include <linux/filter.h>
  76
  77 #endif
  78
  79 #include <pcap.h>
  80 #ifndef HAVE___ATTRIBUTE__
  81 #define __attribute__(x)
  82 #endif
  83
  84 static char *program_name;
  85
  86 /* Forwards */
  87 static void usage(void) __attribute__((noreturn));
  88 static void error(const char *, ...)
  89     __attribute__((noreturn, format (printf, 1, 2)));
  90 static void warning(const char *, ...)
  91     __attribute__((format (printf, 1, 2)));
  92
  93 extern int optind;
  94 extern int opterr;
  95 extern char *optarg;
  96
  97 /*
  98  * On Windows, we need to open the file in binary mode, so that
  99  * we get all the bytes specified by the size we get from "fstat()".
 100  * On UNIX, that's not necessary.  O_BINARY is defined on Windows;
 101  * we define it as 0 if it's not defined, so it does nothing.
 102  */
 103 #ifndef O_BINARY
 104 #define O_BINARY        0
 105 #endif
 106
 107 static char *
 108 read_infile(char *fname)
 109 {
 110         register int i, fd, cc;
 111         register char *cp;
 112         struct stat buf;
 113
 114         fd = open(fname, O_RDONLY|O_BINARY);
 115         if (fd < 0)
 116                 error("can't open %s: %s", fname, pcap_strerror(errno));
 117
 118         if (fstat(fd, &buf) < 0)
 119                 error("can't stat %s: %s", fname, pcap_strerror(errno));
 120
 121         cp = malloc((u_int)buf.st_size + 1);
 122         if (cp == NULL)
 123                 error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
 124                         fname, pcap_strerror(errno));
 125         cc = read(fd, cp, (u_int)buf.st_size);
 126         if (cc < 0)
 127                 error("read %s: %s", fname, pcap_strerror(errno));
 128         if (cc != buf.st_size)
 129                 error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
 130
 131         close(fd);
 132         /* replace "# comment" with spaces */
 133         for (i = 0; i < cc; i++) {
 134                 if (cp[i] == '#')
 135                         while (i < cc && cp[i] != '\n')
 136                                 cp[i++] = ' ';
 137         }
 138         cp[cc] = '\0';
 139         return (cp);
 140 }
 141
 142 /* VARARGS */
 143 static void
 144 error(const char *fmt, ...)
 145 {
 146         va_list ap;
 147
 148         (void)fprintf(stderr, "%s: ", program_name);
 149         va_start(ap, fmt);
 150         (void)vfprintf(stderr, fmt, ap);
 151         va_end(ap);
 152         if (*fmt) {
 153                 fmt += strlen(fmt);
 154                 if (fmt[-1] != '\n')
 155                         (void)fputc('\n', stderr);
 156         }
 157         exit(1);
 158         /* NOTREACHED */
 159 }
 160
 161 /* VARARGS */
 162 static void
 163 warning(const char *fmt, ...)
 164 {
 165         va_list ap;
 166
 167         (void)fprintf(stderr, "%s: WARNING: ", program_name);
 168         va_start(ap, fmt);
 169         (void)vfprintf(stderr, fmt, ap);
 170         va_end(ap);
 171         if (*fmt) {
 172                 fmt += strlen(fmt);
 173                 if (fmt[-1] != '\n')
 174                         (void)fputc('\n', stderr);
 175         }
 176 }
 177
 178 /*
 179  * Copy arg vector into a new buffer, concatenating arguments with spaces.
 180  */
 181 static char *
 182 copy_argv(register char **argv)
 183 {
 184         register char **p;
 185         register u_int len = 0;
 186         char *buf;
 187         char *src, *dst;
 188
 189         p = argv;
 190         if (*p == 0)
 191                 return 0;
 192
 193         while (*p)
 194                 len += strlen(*p++) + 1;
 195
 196         buf = (char *)malloc(len);
 197         if (buf == NULL)
 198                 error("copy_argv: malloc");
 199
 200         p = argv;
 201         dst = buf;
 202         while ((src = *p++) != NULL) {
 203                 while ((*dst++ = *src++) != '\0')
 204                         ;
 205                 dst[-1] = ' ';
 206         }
 207         dst[-1] = '\0';
 208
 209         return buf;
 210 }
 211
 212 #define INSN_COUNT      17
 213
 214 int
 215 main(int argc, char **argv)
 216 {
 217         char *cp, *device;
 218         int op;
 219         int dorfmon, useactivate;
 220         char ebuf[PCAP_ERRBUF_SIZE];
 221         char *infile;
 222         char *cmdbuf;
 223         pcap_t *pd;
 224         int status = 0;
 225         int pcap_fd;
 226 #if defined(USE_BPF)
 227         struct bpf_program bad_fcode;
 228         struct bpf_insn uninitialized[INSN_COUNT];
 229 #elif defined(USE_SOCKET_FILTERS)
 230         struct sock_fprog bad_fcode;
 231         struct sock_filter uninitialized[INSN_COUNT];
 232 #endif
 233         struct bpf_program fcode;
 234
 235         device = NULL;
 236         dorfmon = 0;
 237         useactivate = 0;
 238         infile = NULL;
 239
 240         if ((cp = strrchr(argv[0], '/')) != NULL)
 241                 program_name = cp + 1;
 242         else
 243                 program_name = argv[0];
 244
 245         opterr = 0;
 246         while ((op = getopt(argc, argv, "aF:i:I")) != -1) {
 247                 switch (op) {
 248
 249                 case 'a':
 250                         useactivate = 1;
 251                         break;
 252
 253                 case 'F':
 254                         infile = optarg;
 255                         break;
 256
 257                 case 'i':
 258                         device = optarg;
 259                         break;
 260
 261                 case 'I':
 262                         dorfmon = 1;
 263                         useactivate = 1;        /* required for rfmon */
 264                         break;
 265
 266                 default:
 267                         usage();
 268                         /* NOTREACHED */
 269                 }
 270         }
 271
 272         if (device == NULL) {
 273                 /*
 274                  * No interface specified; get whatever pcap_lookupdev()
 275                  * finds.
 276                  */
 277                 device = pcap_lookupdev(ebuf);
 278                 if (device == NULL) {
 279                         error("couldn't find interface to use: %s",
 280                             ebuf);
 281                 }
 282         }
 283
 284         if (infile != NULL) {
 285                 /*
 286                  * Filter specified with "-F" and a file containing
 287                  * a filter.
 288                  */
 289                 cmdbuf = read_infile(infile);
 290         } else {
 291                 if (optind < argc) {
 292                         /*
 293                          * Filter specified with arguments on the
 294                          * command line.
 295                          */
 296                         cmdbuf = copy_argv(&argv[optind+1]);
 297                 } else {
 298                         /*
 299                          * No filter specified; use an empty string, which
 300                          * compiles to an "accept all" filter.
 301                          */
 302                         cmdbuf = "";
 303                 }
 304         }
 305
 306         if (useactivate) {
 307                 pd = pcap_create(device, ebuf);
 308                 if (pd == NULL)
 309                         error("%s: pcap_create() failed: %s", device, ebuf);
 310                 status = pcap_set_snaplen(pd, 65535);
 311                 if (status != 0)
 312                         error("%s: pcap_set_snaplen failed: %s",
 313                             device, pcap_statustostr(status));
 314                 status = pcap_set_promisc(pd, 1);
 315                 if (status != 0)
 316                         error("%s: pcap_set_promisc failed: %s",
 317                             device, pcap_statustostr(status));
 318                 if (dorfmon) {
 319                         status = pcap_set_rfmon(pd, 1);
 320                         if (status != 0)
 321                                 error("%s: pcap_set_rfmon failed: %s",
 322                                     device, pcap_statustostr(status));
 323                 }
 324                 status = pcap_set_timeout(pd, 1000);
 325                 if (status != 0)
 326                         error("%s: pcap_set_timeout failed: %s",
 327                             device, pcap_statustostr(status));
 328                 status = pcap_activate(pd);
 329                 if (status < 0) {
 330                         /*
 331                          * pcap_activate() failed.
 332                          */
 333                         error("%s: %s\n(%s)", device,
 334                             pcap_statustostr(status), pcap_geterr(pd));
 335                 } else if (status > 0) {
 336                         /*
 337                          * pcap_activate() succeeded, but it's warning us
 338                          * of a problem it had.
 339                          */
 340                         warning("%s: %s\n(%s)", device,
 341                             pcap_statustostr(status), pcap_geterr(pd));
 342                 }
 343         } else {
 344                 *ebuf = '\0';
 345                 pd = pcap_open_live(device, 65535, 1, 1000, ebuf);
 346                 if (pd == NULL)
 347                         error("%s", ebuf);
 348                 else if (*ebuf)
 349                         warning("%s", ebuf);
 350         }
 351
 352         pcap_fd = pcap_fileno(pd);
 353
 354         /*
 355          * Try setting a filter with an uninitialized bpf_program
 356          * structure.  This should cause valgrind to report a
 357          * problem.
 358          *
 359          * We don't check for errors, because it could get an
 360          * error due to a bad pointer or count.
 361          */
 362 #if defined(USE_BPF)
 363         ioctl(pcap_fd, BIOCSETF, &bad_fcode);
 364 #elif defined(USE_SOCKET_FILTERS)
 365         setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
 366             sizeof(bad_fcode));
 367 #endif
 368
 369         /*
 370          * Try setting a filter with an initialized bpf_program
 371          * structure that points to an uninitialized program.
 372          * That should also cause valgrind to report a problem.
 373          *
 374          * We don't check for errors, because it could get an
 375          * error due to a bad pointer or count.
 376          */
 377 #if defined(USE_BPF)
 378         bad_fcode.bf_len = INSN_COUNT;
 379         bad_fcode.bf_insns = uninitialized;
 380         ioctl(pcap_fd, BIOCSETF, &bad_fcode);
 381 #elif defined(USE_SOCKET_FILTERS)
 382         bad_fcode.len = INSN_COUNT;
 383         bad_fcode.filter = uninitialized;
 384         setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode,
 385             sizeof(bad_fcode));
 386 #endif
 387
 388         /*
 389          * Now compile a filter and set the filter with that.
 390          * That should *not* cause valgrind to report a
 391          * problem.
 392          */
 393         if (pcap_compile(pd, &fcode, cmdbuf, 1, 0) < 0)
 394                 error("can't compile filter: %s", pcap_geterr(pd));
 395         if (pcap_setfilter(pd, &fcode) < 0)
 396                 error("can't set filter: %s", pcap_geterr(pd));
 397
 398         pcap_close(pd);
 399         exit(status < 0 ? 1 : 0);
 400 }
 401
 402 static void
 403 usage(void)
 404 {
 405         (void)fprintf(stderr, "%s, with %s\n", program_name,
 406             pcap_lib_version());
 407         (void)fprintf(stderr,
 408             "Usage: %s [-aI] [ -F file ] [ -I interface ] [ expression ]\n",
 409             program_name);
 410         exit(1);
 411 }