274 lines
7.0 KiB
C
274 lines
7.0 KiB
C
/*
|
|
* 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);
|
|
}
|
|
}
|