The Tcpdump Group git mirrors - libpcap/blob - tests/opentest.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 #include <pcap.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdarg.h>
  33 #ifdef _WIN32
  34   #include "getopt.h"
  35 #else
  36   #include <unistd.h>
  37 #endif
  38 #include <errno.h>
  39
  40 #include "pcap/funcattrs.h"
  41
  42 #ifdef _WIN32
  43   #include "portability.h"
  44 #endif
  45
  46 #define MAXIMUM_SNAPLEN         65535
  47
  48 static char *program_name;
  49
  50 /* Forwards */
  51 static void PCAP_NORETURN usage(void);
  52 static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
  53 static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
  54
  55 int
  56 main(int argc, char **argv)
  57 {
  58         register int op;
  59         register char *cp, *device;
  60         int dorfmon, dopromisc, snaplen, useactivate, bufsize;
  61         char ebuf[PCAP_ERRBUF_SIZE];
  62         pcap_if_t *devlist;
  63         pcap_t *pd;
  64         int status = 0;
  65
  66         device = NULL;
  67         dorfmon = 0;
  68         dopromisc = 0;
  69         snaplen = MAXIMUM_SNAPLEN;
  70         bufsize = 0;
  71         useactivate = 0;
  72         if ((cp = strrchr(argv[0], '/')) != NULL)
  73                 program_name = cp + 1;
  74         else
  75                 program_name = argv[0];
  76
  77         opterr = 0;
  78         while ((op = getopt(argc, argv, "i:Ips:aB:")) != -1) {
  79                 switch (op) {
  80
  81                 case 'i':
  82                         device = optarg;
  83                         break;
  84
  85                 case 'I':
  86                         dorfmon = 1;
  87                         useactivate = 1;        /* required for rfmon */
  88                         break;
  89
  90                 case 'p':
  91                         dopromisc = 1;
  92                         break;
  93
  94                 case 's': {
  95                         char *end;
  96
  97                         snaplen = strtol(optarg, &end, 0);
  98                         if (optarg == end || *end != '\0'
  99                             || snaplen < 0 || snaplen > MAXIMUM_SNAPLEN)
 100                                 error("invalid snaplen %s", optarg);
 101                         else if (snaplen == 0)
 102                                 snaplen = MAXIMUM_SNAPLEN;
 103                         break;
 104                 }
 105
 106                 case 'B':
 107                         bufsize = atoi(optarg)*1024;
 108                         if (bufsize <= 0)
 109                                 error("invalid packet buffer size %s", optarg);
 110                         useactivate = 1;        /* required for bufsize */
 111                         break;
 112
 113                 case 'a':
 114                         useactivate = 1;
 115                         break;
 116
 117                 default:
 118                         usage();
 119                         /* NOTREACHED */
 120                 }
 121         }
 122
 123         if (device == NULL) {
 124                 if (pcap_findalldevs(&devlist, ebuf) == -1)
 125                         error("%s", ebuf);
 126                 if (devlist == NULL)
 127                         error("no interfaces available for capture");
 128                 device = strdup(devlist->name);
 129                 pcap_freealldevs(devlist);
 130         }
 131         if (useactivate) {
 132                 pd = pcap_create(device, ebuf);
 133                 if (pd == NULL)
 134                         error("%s: pcap_create failed: %s", device, ebuf);
 135                 status = pcap_set_snaplen(pd, snaplen);
 136                 if (status != 0)
 137                         error("%s: pcap_set_snaplen failed: %s",
 138                             device, pcap_statustostr(status));
 139                 if (dopromisc) {
 140                         status = pcap_set_promisc(pd, 1);
 141                         if (status != 0)
 142                                 error("%s: pcap_set_promisc failed: %s",
 143                                     device, pcap_statustostr(status));
 144                 }
 145                 if (dorfmon) {
 146                         status = pcap_set_rfmon(pd, 1);
 147                         if (status != 0)
 148                                 error("%s: pcap_set_rfmon failed: %s",
 149                                     device, pcap_statustostr(status));
 150                 }
 151                 status = pcap_set_timeout(pd, 1000);
 152                 if (status != 0)
 153                         error("%s: pcap_set_timeout failed: %s",
 154                             device, pcap_statustostr(status));
 155                 if (bufsize != 0) {
 156                         status = pcap_set_buffer_size(pd, bufsize);
 157                         if (status != 0)
 158                                 error("%s: pcap_set_buffer_size failed: %s",
 159                                     device, pcap_statustostr(status));
 160                 }
 161                 status = pcap_activate(pd);
 162                 if (status < 0) {
 163                         /*
 164                          * pcap_activate() failed.
 165                          */
 166                         error("%s: %s\n(%s)", device,
 167                             pcap_statustostr(status), pcap_geterr(pd));
 168                 } else if (status > 0) {
 169                         /*
 170                          * pcap_activate() succeeded, but it's warning us
 171                          * of a problem it had.
 172                          */
 173                         warning("%s: %s\n(%s)", device,
 174                             pcap_statustostr(status), pcap_geterr(pd));
 175                 } else
 176                         printf("%s opened successfully\n", device);
 177         } else {
 178                 *ebuf = '\0';
 179                 pd = pcap_open_live(device, 65535, 0, 1000, ebuf);
 180                 if (pd == NULL)
 181                         error("%s", ebuf);
 182                 else if (*ebuf)
 183                         warning("%s", ebuf);
 184                 else
 185                         printf("%s opened successfully\n", device);
 186         }
 187         pcap_close(pd);
 188         exit(status < 0 ? 1 : 0);
 189 }
 190
 191 static void
 192 usage(void)
 193 {
 194         (void)fprintf(stderr,
 195             "Usage: %s [ -Ipa ] [ -i interface ] [ -s snaplen ] [ -B bufsize ]\n",
 196             program_name);
 197         exit(1);
 198 }
 199
 200 /* VARARGS */
 201 static void
 202 error(const char *fmt, ...)
 203 {
 204         va_list ap;
 205
 206         (void)fprintf(stderr, "%s: ", program_name);
 207         va_start(ap, fmt);
 208         (void)vfprintf(stderr, fmt, ap);
 209         va_end(ap);
 210         if (*fmt) {
 211                 fmt += strlen(fmt);
 212                 if (fmt[-1] != '\n')
 213                         (void)fputc('\n', stderr);
 214         }
 215         exit(1);
 216         /* NOTREACHED */
 217 }
 218
 219 /* VARARGS */
 220 static void
 221 warning(const char *fmt, ...)
 222 {
 223         va_list ap;
 224
 225         (void)fprintf(stderr, "%s: WARNING: ", program_name);
 226         va_start(ap, fmt);
 227         (void)vfprintf(stderr, fmt, ap);
 228         va_end(ap);
 229         if (*fmt) {
 230                 fmt += strlen(fmt);
 231                 if (fmt[-1] != '\n')
 232                         (void)fputc('\n', stderr);
 233         }
 234 }