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/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static const char copyright[] _U_ =
"@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#include <pcap.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#ifdef _WIN32
#include "getopt.h"
#else
#include <unistd.h>
#endif
#include <errno.h>
#define MAXIMUM_SNAPLEN 65535
static char *program_name;
/*
* This was introduced by Clang:
*
* http://clang.llvm.org/docs/LanguageExtensions.html#has-attribute
*
* in some version (which version?); it has been picked up by GCC 5.0.
*/
#ifndef __has_attribute
/*
* It's a macro, so you can check whether it's defined to check
* whether it's supported.
*
* If it's not, define it to always return 0, so that we move on to
* the fallback checks.
*/
#define __has_attribute(x) 0
#endif
#if __has_attribute(noreturn) \
|| (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)) \
|| (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)) \
|| (defined(__xlC__) && __xlC__ >= 0x0A01) \
|| (defined(__HP_aCC) && __HP_aCC >= 61000)
/*
* Compiler with support for it, or GCC 2.5 and later, or Solaris Studio 12
* (Sun C 5.9) and later, or IBM XL C 10.1 and later (do any earlier
* versions of XL C support this?), or HP aCC A.06.10 and later.
*/
#define PCAP_NORETURN __attribute((noreturn))
#elif defined( _MSC_VER )
#define PCAP_NORETURN __declspec(noreturn)
#else
#define PCAP_NORETURN
#endif
#if __has_attribute(__format__) \
|| (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 203)) \
|| (defined(__xlC__) && __xlC__ >= 0x0A01) \
|| (defined(__HP_aCC) && __HP_aCC >= 61000)
/*
* Compiler with support for it, or GCC 2.3 and later, or IBM XL C 10.1
* and later (do any earlier versions of XL C support this?),
* or HP aCC A.06.10 and later.
*/
#define PCAP_PRINTFLIKE(x,y) __attribute__((__format__(__printf__,x,y)))
#else
#define PCAP_PRINTFLIKE(x,y)
#endif
/* Forwards */
static void PCAP_NORETURN usage(void);
static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
int
main(int argc, char **argv)
{
register int op;
register char *cp, *device;
int dorfmon, dopromisc, snaplen, useactivate, bufsize;
char ebuf[PCAP_ERRBUF_SIZE];
pcap_t *pd;
int status = 0;
device = NULL;
dorfmon = 0;
dopromisc = 0;
snaplen = MAXIMUM_SNAPLEN;
bufsize = 0;
useactivate = 0;
if ((cp = strrchr(argv[0], '/')) != NULL)
program_name = cp + 1;
else
program_name = argv[0];
opterr = 0;
while ((op = getopt(argc, argv, "i:Ips:aB:")) != -1) {
switch (op) {
case 'i':
device = optarg;
break;
case 'I':
dorfmon = 1;
useactivate = 1; /* required for rfmon */
break;
case 'p':
dopromisc = 1;
break;
case 's': {
char *end;
snaplen = strtol(optarg, &end, 0);
if (optarg == end || *end != '\0'
|| snaplen < 0 || snaplen > MAXIMUM_SNAPLEN)
error("invalid snaplen %s", optarg);
else if (snaplen == 0)
snaplen = MAXIMUM_SNAPLEN;
break;
}
case 'B':
bufsize = atoi(optarg)*1024;
if (bufsize <= 0)
error("invalid packet buffer size %s", optarg);
useactivate = 1; /* required for bufsize */
break;
case 'a':
useactivate = 1;
break;
default:
usage();
/* NOTREACHED */
}
}
if (device == NULL) {
device = pcap_lookupdev(ebuf);
if (device == NULL)
error("pcap_lookupdev failed: %s", ebuf);
}
if (useactivate) {
pd = pcap_create(device, ebuf);
if (pd == NULL)
error("%s: pcap_create failed: %s", device, ebuf);
status = pcap_set_snaplen(pd, snaplen);
if (status != 0)
error("%s: pcap_set_snaplen failed: %s",
device, pcap_statustostr(status));
if (dopromisc) {
status = pcap_set_promisc(pd, 1);
if (status != 0)
error("%s: pcap_set_promisc failed: %s",
device, pcap_statustostr(status));
}
if (dorfmon) {
status = pcap_set_rfmon(pd, 1);
if (status != 0)
error("%s: pcap_set_rfmon failed: %s",
device, pcap_statustostr(status));
}
status = pcap_set_timeout(pd, 1000);
if (status != 0)
error("%s: pcap_set_timeout failed: %s",
device, pcap_statustostr(status));
if (bufsize != 0) {
status = pcap_set_buffer_size(pd, bufsize);
if (status != 0)
error("%s: pcap_set_buffer_size failed: %s",
device, pcap_statustostr(status));
}
status = pcap_activate(pd);
if (status < 0) {
/*
* pcap_activate() failed.
*/
error("%s: %s\n(%s)", device,
pcap_statustostr(status), pcap_geterr(pd));
} else if (status > 0) {
/*
* pcap_activate() succeeded, but it's warning us
* of a problem it had.
*/
warning("%s: %s\n(%s)", device,
pcap_statustostr(status), pcap_geterr(pd));
} else
printf("%s opened successfully\n", device);
} else {
*ebuf = '\0';
pd = pcap_open_live(device, 65535, 0, 1000, ebuf);
if (pd == NULL)
error("%s", ebuf);
else if (*ebuf)
warning("%s", ebuf);
else
printf("%s opened successfully\n", device);
}
pcap_close(pd);
exit(status < 0 ? 1 : 0);
}
static void
usage(void)
{
(void)fprintf(stderr,
"Usage: %s [ -Ipa ] [ -i interface ] [ -s snaplen ] [ -B bufsize ]\n",
program_name);
exit(1);
}
/* VARARGS */
static void
error(const char *fmt, ...)
{
va_list ap;
(void)fprintf(stderr, "%s: ", program_name);
va_start(ap, fmt);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
if (*fmt) {
fmt += strlen(fmt);
if (fmt[-1] != '\n')
(void)fputc('\n', stderr);
}
exit(1);
/* NOTREACHED */
}
/* VARARGS */
static void
warning(const char *fmt, ...)
{
va_list ap;
(void)fprintf(stderr, "%s: WARNING: ", program_name);
va_start(ap, fmt);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
if (*fmt) {
fmt += strlen(fmt);
if (fmt[-1] != '\n')
(void)fputc('\n', stderr);
}
}