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 #define MAXIMUM_SNAPLEN         65535
  43
  44 static char *program_name;
  45
  46 /* Forwards */
  47 static void PCAP_NORETURN usage(void);
  48 static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
  49 static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
  50
  51 int
  52 main(int argc, char **argv)
  53 {
  54         register int op;
  55         register char *cp, *device;
  56         int dorfmon, dopromisc, snaplen, useactivate, bufsize;
  57         char ebuf[PCAP_ERRBUF_SIZE];
  58         pcap_t *pd;
  59         int status = 0;
  60
  61         device = NULL;
  62         dorfmon = 0;
  63         dopromisc = 0;
  64         snaplen = MAXIMUM_SNAPLEN;
  65         bufsize = 0;
  66         useactivate = 0;
  67         if ((cp = strrchr(argv[0], '/')) != NULL)
  68                 program_name = cp + 1;
  69         else
  70                 program_name = argv[0];
  71
  72         opterr = 0;
  73         while ((op = getopt(argc, argv, "i:Ips:aB:")) != -1) {
  74                 switch (op) {
  75
  76                 case 'i':
  77                         device = optarg;
  78                         break;
  79
  80                 case 'I':
  81                         dorfmon = 1;
  82                         useactivate = 1;        /* required for rfmon */
  83                         break;
  84
  85                 case 'p':
  86                         dopromisc = 1;
  87                         break;
  88
  89                 case 's': {
  90                         char *end;
  91
  92                         snaplen = strtol(optarg, &end, 0);
  93                         if (optarg == end || *end != '\0'
  94                             || snaplen < 0 || snaplen > MAXIMUM_SNAPLEN)
  95                                 error("invalid snaplen %s", optarg);
  96                         else if (snaplen == 0)
  97                                 snaplen = MAXIMUM_SNAPLEN;
  98                         break;
  99                 }
 100
 101                 case 'B':
 102                         bufsize = atoi(optarg)*1024;
 103                         if (bufsize <= 0)
 104                                 error("invalid packet buffer size %s", optarg);
 105                         useactivate = 1;        /* required for bufsize */
 106                         break;
 107
 108                 case 'a':
 109                         useactivate = 1;
 110                         break;
 111
 112                 default:
 113                         usage();
 114                         /* NOTREACHED */
 115                 }
 116         }
 117
 118         if (device == NULL) {
 119                 device = pcap_lookupdev(ebuf);
 120                 if (device == NULL)
 121                         error("pcap_lookupdev failed: %s", ebuf);
 122         }
 123         if (useactivate) {
 124                 pd = pcap_create(device, ebuf);
 125                 if (pd == NULL)
 126                         error("%s: pcap_create failed: %s", device, ebuf);
 127                 status = pcap_set_snaplen(pd, snaplen);
 128                 if (status != 0)
 129                         error("%s: pcap_set_snaplen failed: %s",
 130                             device, pcap_statustostr(status));
 131                 if (dopromisc) {
 132                         status = pcap_set_promisc(pd, 1);
 133                         if (status != 0)
 134                                 error("%s: pcap_set_promisc failed: %s",
 135                                     device, pcap_statustostr(status));
 136                 }
 137                 if (dorfmon) {
 138                         status = pcap_set_rfmon(pd, 1);
 139                         if (status != 0)
 140                                 error("%s: pcap_set_rfmon failed: %s",
 141                                     device, pcap_statustostr(status));
 142                 }
 143                 status = pcap_set_timeout(pd, 1000);
 144                 if (status != 0)
 145                         error("%s: pcap_set_timeout failed: %s",
 146                             device, pcap_statustostr(status));
 147                 if (bufsize != 0) {
 148                         status = pcap_set_buffer_size(pd, bufsize);
 149                         if (status != 0)
 150                                 error("%s: pcap_set_buffer_size failed: %s",
 151                                     device, pcap_statustostr(status));
 152                 }
 153                 status = pcap_activate(pd);
 154                 if (status < 0) {
 155                         /*
 156                          * pcap_activate() failed.
 157                          */
 158                         error("%s: %s\n(%s)", device,
 159                             pcap_statustostr(status), pcap_geterr(pd));
 160                 } else if (status > 0) {
 161                         /*
 162                          * pcap_activate() succeeded, but it's warning us
 163                          * of a problem it had.
 164                          */
 165                         warning("%s: %s\n(%s)", device,
 166                             pcap_statustostr(status), pcap_geterr(pd));
 167                 } else
 168                         printf("%s opened successfully\n", device);
 169         } else {
 170                 *ebuf = '\0';
 171                 pd = pcap_open_live(device, 65535, 0, 1000, ebuf);
 172                 if (pd == NULL)
 173                         error("%s", ebuf);
 174                 else if (*ebuf)
 175                         warning("%s", ebuf);
 176                 else
 177                         printf("%s opened successfully\n", device);
 178         }
 179         pcap_close(pd);
 180         exit(status < 0 ? 1 : 0);
 181 }
 182
 183 static void
 184 usage(void)
 185 {
 186         (void)fprintf(stderr,
 187             "Usage: %s [ -Ipa ] [ -i interface ] [ -s snaplen ] [ -B bufsize ]\n",
 188             program_name);
 189         exit(1);
 190 }
 191
 192 /* VARARGS */
 193 static void
 194 error(const char *fmt, ...)
 195 {
 196         va_list ap;
 197
 198         (void)fprintf(stderr, "%s: ", program_name);
 199         va_start(ap, fmt);
 200         (void)vfprintf(stderr, fmt, ap);
 201         va_end(ap);
 202         if (*fmt) {
 203                 fmt += strlen(fmt);
 204                 if (fmt[-1] != '\n')
 205                         (void)fputc('\n', stderr);
 206         }
 207         exit(1);
 208         /* NOTREACHED */
 209 }
 210
 211 /* VARARGS */
 212 static void
 213 warning(const char *fmt, ...)
 214 {
 215         va_list ap;
 216
 217         (void)fprintf(stderr, "%s: WARNING: ", program_name);
 218         va_start(ap, fmt);
 219         (void)vfprintf(stderr, fmt, ap);
 220         va_end(ap);
 221         if (*fmt) {
 222                 fmt += strlen(fmt);
 223                 if (fmt[-1] != '\n')
 224                         (void)fputc('\n', stderr);
 225         }
 226 }