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 #include "varattrs.h"
  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 <pcap.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <stdarg.h>
  35 #ifdef _WIN32
  36   #include "getopt.h"
  37 #else
  38   #include <unistd.h>
  39 #endif
  40 #include <errno.h>
  41
  42 #include "pcap/funcattrs.h"
  43
  44 #ifdef _WIN32
  45   #include "portability.h"
  46 #endif
  47
  48 #define MAXIMUM_SNAPLEN         65535
  49
  50 static char *program_name;
  51
  52 /* Forwards */
  53 static void PCAP_NORETURN usage(void);
  54 static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
  55 static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
  56
  57 int
  58 main(int argc, char **argv)
  59 {
  60         register int op;
  61         register char *cp, *device;
  62         int dorfmon, dopromisc, snaplen, useactivate, bufsize;
  63         char ebuf[PCAP_ERRBUF_SIZE];
  64         pcap_if_t *devlist;
  65         pcap_t *pd;
  66         int status = 0;
  67
  68         device = NULL;
  69         dorfmon = 0;
  70         dopromisc = 0;
  71         snaplen = MAXIMUM_SNAPLEN;
  72         bufsize = 0;
  73         useactivate = 0;
  74         if ((cp = strrchr(argv[0], '/')) != NULL)
  75                 program_name = cp + 1;
  76         else
  77                 program_name = argv[0];
  78
  79         opterr = 0;
  80         while ((op = getopt(argc, argv, "i:Ips:aB:")) != -1) {
  81                 switch (op) {
  82
  83                 case 'i':
  84                         device = optarg;
  85                         break;
  86
  87                 case 'I':
  88                         dorfmon = 1;
  89                         useactivate = 1;        /* required for rfmon */
  90                         break;
  91
  92                 case 'p':
  93                         dopromisc = 1;
  94                         break;
  95
  96                 case 's': {
  97                         char *end;
  98
  99                         snaplen = strtol(optarg, &end, 0);
 100                         if (optarg == end || *end != '\0'
 101                             || snaplen < 0 || snaplen > MAXIMUM_SNAPLEN)
 102                                 error("invalid snaplen %s", optarg);
 103                         else if (snaplen == 0)
 104                                 snaplen = MAXIMUM_SNAPLEN;
 105                         break;
 106                 }
 107
 108                 case 'B':
 109                         bufsize = atoi(optarg)*1024;
 110                         if (bufsize <= 0)
 111                                 error("invalid packet buffer size %s", optarg);
 112                         useactivate = 1;        /* required for bufsize */
 113                         break;
 114
 115                 case 'a':
 116                         useactivate = 1;
 117                         break;
 118
 119                 default:
 120                         usage();
 121                         /* NOTREACHED */
 122                 }
 123         }
 124
 125         if (device == NULL) {
 126                 if (pcap_findalldevs(&devlist, ebuf) == -1)
 127                         error("%s", ebuf);
 128                 if (devlist == NULL)
 129                         error("no interfaces available for capture");
 130                 device = strdup(devlist->name);
 131                 pcap_freealldevs(devlist);
 132         }
 133         if (useactivate) {
 134                 pd = pcap_create(device, ebuf);
 135                 if (pd == NULL)
 136                         error("%s: pcap_create failed: %s", device, ebuf);
 137                 status = pcap_set_snaplen(pd, snaplen);
 138                 if (status != 0)
 139                         error("%s: pcap_set_snaplen failed: %s",
 140                             device, pcap_statustostr(status));
 141                 if (dopromisc) {
 142                         status = pcap_set_promisc(pd, 1);
 143                         if (status != 0)
 144                                 error("%s: pcap_set_promisc failed: %s",
 145                                     device, pcap_statustostr(status));
 146                 }
 147                 if (dorfmon) {
 148                         status = pcap_set_rfmon(pd, 1);
 149                         if (status != 0)
 150                                 error("%s: pcap_set_rfmon failed: %s",
 151                                     device, pcap_statustostr(status));
 152                 }
 153                 status = pcap_set_timeout(pd, 1000);
 154                 if (status != 0)
 155                         error("%s: pcap_set_timeout failed: %s",
 156                             device, pcap_statustostr(status));
 157                 if (bufsize != 0) {
 158                         status = pcap_set_buffer_size(pd, bufsize);
 159                         if (status != 0)
 160                                 error("%s: pcap_set_buffer_size failed: %s",
 161                                     device, pcap_statustostr(status));
 162                 }
 163                 status = pcap_activate(pd);
 164                 if (status < 0) {
 165                         /*
 166                          * pcap_activate() failed.
 167                          */
 168                         error("%s: %s\n(%s)", device,
 169                             pcap_statustostr(status), pcap_geterr(pd));
 170                 } else if (status > 0) {
 171                         /*
 172                          * pcap_activate() succeeded, but it's warning us
 173                          * of a problem it had.
 174                          */
 175                         warning("%s: %s\n(%s)", device,
 176                             pcap_statustostr(status), pcap_geterr(pd));
 177                 } else
 178                         printf("%s opened successfully\n", device);
 179         } else {
 180                 *ebuf = '\0';
 181                 pd = pcap_open_live(device, 65535, 0, 1000, ebuf);
 182                 if (pd == NULL)
 183                         error("%s", ebuf);
 184                 else if (*ebuf)
 185                         warning("%s", ebuf);
 186                 else
 187                         printf("%s opened successfully\n", device);
 188         }
 189         pcap_close(pd);
 190         exit(status < 0 ? 1 : 0);
 191 }
 192
 193 static void
 194 usage(void)
 195 {
 196         (void)fprintf(stderr,
 197             "Usage: %s [ -Ipa ] [ -i interface ] [ -s snaplen ] [ -B bufsize ]\n",
 198             program_name);
 199         exit(1);
 200 }
 201
 202 /* VARARGS */
 203 static void
 204 error(const char *fmt, ...)
 205 {
 206         va_list ap;
 207
 208         (void)fprintf(stderr, "%s: ", program_name);
 209         va_start(ap, fmt);
 210         (void)vfprintf(stderr, fmt, ap);
 211         va_end(ap);
 212         if (*fmt) {
 213                 fmt += strlen(fmt);
 214                 if (fmt[-1] != '\n')
 215                         (void)fputc('\n', stderr);
 216         }
 217         exit(1);
 218         /* NOTREACHED */
 219 }
 220
 221 /* VARARGS */
 222 static void
 223 warning(const char *fmt, ...)
 224 {
 225         va_list ap;
 226
 227         (void)fprintf(stderr, "%s: WARNING: ", program_name);
 228         va_start(ap, fmt);
 229         (void)vfprintf(stderr, fmt, ap);
 230         va_end(ap);
 231         if (*fmt) {
 232                 fmt += strlen(fmt);
 233                 if (fmt[-1] != '\n')
 234                         (void)fputc('\n', stderr);
 235         }
 236 }