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