|
Packit |
209cc3 |
/*
|
|
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209cc3 |
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
|
|
Packit |
209cc3 |
* The Regents of the University of California. All rights reserved.
|
|
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209cc3 |
*
|
|
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209cc3 |
* Redistribution and use in source and binary forms, with or without
|
|
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209cc3 |
* modification, are permitted provided that: (1) source code distributions
|
|
Packit |
209cc3 |
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
Packit |
209cc3 |
* distributions including binary code include the above copyright notice and
|
|
Packit |
209cc3 |
* this paragraph in its entirety in the documentation or other materials
|
|
Packit |
209cc3 |
* provided with the distribution, and (3) all advertising materials mentioning
|
|
Packit |
209cc3 |
* features or use of this software display the following acknowledgement:
|
|
Packit |
209cc3 |
* ``This product includes software developed by the University of California,
|
|
Packit |
209cc3 |
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
Packit |
209cc3 |
* the University nor the names of its contributors may be used to endorse
|
|
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209cc3 |
* or promote products derived from this software without specific prior
|
|
Packit |
209cc3 |
* written permission.
|
|
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209cc3 |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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|
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209cc3 |
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
Packit |
209cc3 |
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
Packit |
209cc3 |
*/
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
#include "varattrs.h"
|
|
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209cc3 |
|
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209cc3 |
#ifndef lint
|
|
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209cc3 |
static const char copyright[] _U_ =
|
|
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209cc3 |
"@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
|
|
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209cc3 |
The Regents of the University of California. All rights reserved.\n";
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209cc3 |
#endif
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209cc3 |
|
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Packit |
209cc3 |
#include <stdio.h>
|
|
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209cc3 |
#include <stdlib.h>
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209cc3 |
#include <string.h>
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209cc3 |
#include <stdarg.h>
|
|
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209cc3 |
#include <limits.h>
|
|
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209cc3 |
#ifdef _WIN32
|
|
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209cc3 |
#include <winsock2.h>
|
|
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209cc3 |
#include <windows.h>
|
|
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209cc3 |
|
|
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209cc3 |
#define THREAD_HANDLE HANDLE
|
|
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209cc3 |
#define THREAD_FUNC_ARG_TYPE LPVOID
|
|
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209cc3 |
#define THREAD_FUNC_RETURN_TYPE DWORD __stdcall
|
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209cc3 |
|
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209cc3 |
#include "getopt.h"
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209cc3 |
#else
|
|
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209cc3 |
#include <pthread.h>
|
|
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209cc3 |
#include <signal.h>
|
|
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209cc3 |
#include <unistd.h>
|
|
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209cc3 |
|
|
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209cc3 |
#define THREAD_HANDLE pthread_t
|
|
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209cc3 |
#define THREAD_FUNC_ARG_TYPE void *
|
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209cc3 |
#define THREAD_FUNC_RETURN_TYPE void *
|
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209cc3 |
#endif
|
|
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209cc3 |
#include <errno.h>
|
|
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209cc3 |
#include <sys/types.h>
|
|
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209cc3 |
|
|
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209cc3 |
#include <pcap.h>
|
|
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209cc3 |
|
|
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209cc3 |
#include "pcap/funcattrs.h"
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|
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209cc3 |
|
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209cc3 |
#ifdef _WIN32
|
|
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209cc3 |
#include "portability.h"
|
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209cc3 |
#endif
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|
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209cc3 |
|
|
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209cc3 |
static char *program_name;
|
|
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209cc3 |
|
|
Packit |
209cc3 |
/* Forwards */
|
|
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209cc3 |
static void countme(u_char *, const struct pcap_pkthdr *, const u_char *);
|
|
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209cc3 |
static void PCAP_NORETURN usage(void);
|
|
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209cc3 |
static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
|
|
Packit |
209cc3 |
static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
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|
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209cc3 |
static char *copy_argv(char **);
|
|
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209cc3 |
|
|
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209cc3 |
static pcap_t *pd;
|
|
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209cc3 |
|
|
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209cc3 |
#ifdef _WIN32
|
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209cc3 |
/*
|
|
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209cc3 |
* Generate a string for a Win32-specific error (i.e. an error generated when
|
|
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209cc3 |
* calling a Win32 API).
|
|
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209cc3 |
* For errors occurred during standard C calls, we still use pcap_strerror()
|
|
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209cc3 |
*/
|
|
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209cc3 |
#define ERRBUF_SIZE 1024
|
|
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209cc3 |
static const char *
|
|
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209cc3 |
win32_strerror(DWORD error)
|
|
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209cc3 |
{
|
|
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209cc3 |
static char errbuf[ERRBUF_SIZE+1];
|
|
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209cc3 |
size_t errlen;
|
|
Packit |
209cc3 |
|
|
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209cc3 |
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, error, 0, errbuf,
|
|
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209cc3 |
ERRBUF_SIZE, NULL);
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|
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209cc3 |
|
|
Packit |
209cc3 |
/*
|
|
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209cc3 |
* "FormatMessage()" "helpfully" sticks CR/LF at the end of the
|
|
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209cc3 |
* message. Get rid of it.
|
|
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209cc3 |
*/
|
|
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209cc3 |
errlen = strlen(errbuf);
|
|
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209cc3 |
if (errlen >= 2) {
|
|
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209cc3 |
errbuf[errlen - 1] = '\0';
|
|
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209cc3 |
errbuf[errlen - 2] = '\0';
|
|
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209cc3 |
errlen -= 2;
|
|
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209cc3 |
}
|
|
Packit |
209cc3 |
return errbuf;
|
|
Packit |
209cc3 |
}
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|
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209cc3 |
#else
|
|
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209cc3 |
static void
|
|
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209cc3 |
catch_sigusr1(int sig _U_)
|
|
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209cc3 |
{
|
|
Packit |
209cc3 |
printf("Got SIGUSR1\n");
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
#endif
|
|
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209cc3 |
|
|
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209cc3 |
static void
|
|
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209cc3 |
sleep_secs(int secs)
|
|
Packit |
209cc3 |
{
|
|
Packit |
209cc3 |
#ifdef _WIN32
|
|
Packit |
209cc3 |
Sleep(secs*1000);
|
|
Packit |
209cc3 |
#else
|
|
Packit |
209cc3 |
unsigned secs_remaining;
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
if (secs <= 0)
|
|
Packit |
209cc3 |
return;
|
|
Packit |
209cc3 |
secs_remaining = secs;
|
|
Packit |
209cc3 |
while (secs_remaining != 0)
|
|
Packit |
209cc3 |
secs_remaining = sleep(secs_remaining);
|
|
Packit |
209cc3 |
#endif
|
|
Packit |
209cc3 |
}
|
|
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209cc3 |
|
|
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209cc3 |
static THREAD_FUNC_RETURN_TYPE
|
|
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209cc3 |
capture_thread_func(THREAD_FUNC_ARG_TYPE arg)
|
|
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209cc3 |
{
|
|
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209cc3 |
char *device = arg;
|
|
Packit |
209cc3 |
int packet_count;
|
|
Packit |
209cc3 |
int status;
|
|
Packit |
209cc3 |
#ifndef _WIN32
|
|
Packit |
209cc3 |
struct sigaction action;
|
|
Packit |
209cc3 |
sigset_t mask;
|
|
Packit |
209cc3 |
#endif
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
#ifndef _WIN32
|
|
Packit |
209cc3 |
sigemptyset(&mask);
|
|
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209cc3 |
action.sa_handler = catch_sigusr1;
|
|
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209cc3 |
action.sa_mask = mask;
|
|
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209cc3 |
action.sa_flags = 0;
|
|
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209cc3 |
if (sigaction(SIGUSR1, &action, NULL) == -1)
|
|
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209cc3 |
error("Can't catch SIGUSR1: %s", strerror(errno));
|
|
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209cc3 |
#endif
|
|
Packit |
209cc3 |
|
|
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209cc3 |
printf("Listening on %s\n", device);
|
|
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209cc3 |
for (;;) {
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|
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209cc3 |
packet_count = 0;
|
|
Packit |
209cc3 |
status = pcap_dispatch(pd, -1, countme,
|
|
Packit |
209cc3 |
(u_char *)&packet_count);
|
|
Packit |
209cc3 |
if (status < 0)
|
|
Packit |
209cc3 |
break;
|
|
Packit |
209cc3 |
if (status != 0) {
|
|
Packit |
209cc3 |
printf("%d packets seen, %d packets counted after pcap_dispatch returns\n",
|
|
Packit |
209cc3 |
status, packet_count);
|
|
Packit |
209cc3 |
} else
|
|
Packit |
209cc3 |
printf("No packets seen by pcap_dispatch\n");
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
if (status == -2) {
|
|
Packit |
209cc3 |
/*
|
|
Packit |
209cc3 |
* We got interrupted, so perhaps we didn't
|
|
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209cc3 |
* manage to finish a line we were printing.
|
|
Packit |
209cc3 |
* Print an extra newline, just in case.
|
|
Packit |
209cc3 |
*/
|
|
Packit |
209cc3 |
putchar('\n');
|
|
Packit |
209cc3 |
printf("Loop got broken\n");
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
(void)fflush(stdout);
|
|
Packit |
209cc3 |
if (status == -1) {
|
|
Packit |
209cc3 |
/*
|
|
Packit |
209cc3 |
* Error. Report it.
|
|
Packit |
209cc3 |
*/
|
|
Packit |
209cc3 |
(void)fprintf(stderr, "%s: pcap_loop: %s\n",
|
|
Packit |
209cc3 |
program_name, pcap_geterr(pd));
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
return 0;
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
int
|
|
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209cc3 |
main(int argc, char **argv)
|
|
Packit |
209cc3 |
{
|
|
Packit |
209cc3 |
register int op;
|
|
Packit |
209cc3 |
register char *cp, *cmdbuf, *device;
|
|
Packit |
209cc3 |
int immediate = 0;
|
|
Packit |
209cc3 |
pcap_if_t *devlist;
|
|
Packit |
209cc3 |
bpf_u_int32 localnet, netmask;
|
|
Packit |
209cc3 |
struct bpf_program fcode;
|
|
Packit |
209cc3 |
char ebuf[PCAP_ERRBUF_SIZE];
|
|
Packit |
209cc3 |
int status;
|
|
Packit |
209cc3 |
THREAD_HANDLE capture_thread;
|
|
Packit |
209cc3 |
#ifndef _WIN32
|
|
Packit |
209cc3 |
void *retval;
|
|
Packit |
209cc3 |
#endif
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
device = NULL;
|
|
Packit |
209cc3 |
if ((cp = strrchr(argv[0], '/')) != NULL)
|
|
Packit |
209cc3 |
program_name = cp + 1;
|
|
Packit |
209cc3 |
else
|
|
Packit |
209cc3 |
program_name = argv[0];
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
opterr = 0;
|
|
Packit |
209cc3 |
while ((op = getopt(argc, argv, "i:")) != -1) {
|
|
Packit |
209cc3 |
switch (op) {
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
case 'i':
|
|
Packit |
209cc3 |
device = optarg;
|
|
Packit |
209cc3 |
break;
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
default:
|
|
Packit |
209cc3 |
usage();
|
|
Packit |
209cc3 |
/* NOTREACHED */
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
if (device == NULL) {
|
|
Packit |
209cc3 |
if (pcap_findalldevs(&devlist, ebuf) == -1)
|
|
Packit |
209cc3 |
error("%s", ebuf);
|
|
Packit |
209cc3 |
if (devlist == NULL)
|
|
Packit |
209cc3 |
error("no interfaces available for capture");
|
|
Packit |
209cc3 |
device = strdup(devlist->name);
|
|
Packit |
209cc3 |
pcap_freealldevs(devlist);
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
*ebuf = '\0';
|
|
Packit |
209cc3 |
pd = pcap_create(device, ebuf);
|
|
Packit |
209cc3 |
if (pd == NULL)
|
|
Packit |
209cc3 |
error("%s", ebuf);
|
|
Packit |
209cc3 |
status = pcap_set_snaplen(pd, 65535);
|
|
Packit |
209cc3 |
if (status != 0)
|
|
Packit |
209cc3 |
error("%s: pcap_set_snaplen failed: %s",
|
|
Packit |
209cc3 |
device, pcap_statustostr(status));
|
|
Packit |
209cc3 |
if (immediate) {
|
|
Packit |
209cc3 |
status = pcap_set_immediate_mode(pd, 1);
|
|
Packit |
209cc3 |
if (status != 0)
|
|
Packit |
209cc3 |
error("%s: pcap_set_immediate_mode failed: %s",
|
|
Packit |
209cc3 |
device, pcap_statustostr(status));
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
status = pcap_set_timeout(pd, 5*60*1000);
|
|
Packit |
209cc3 |
if (status != 0)
|
|
Packit |
209cc3 |
error("%s: pcap_set_timeout failed: %s",
|
|
Packit |
209cc3 |
device, pcap_statustostr(status));
|
|
Packit |
209cc3 |
status = pcap_activate(pd);
|
|
Packit |
209cc3 |
if (status < 0) {
|
|
Packit |
209cc3 |
/*
|
|
Packit |
209cc3 |
* pcap_activate() failed.
|
|
Packit |
209cc3 |
*/
|
|
Packit |
209cc3 |
error("%s: %s\n(%s)", device,
|
|
Packit |
209cc3 |
pcap_statustostr(status), pcap_geterr(pd));
|
|
Packit |
209cc3 |
} else if (status > 0) {
|
|
Packit |
209cc3 |
/*
|
|
Packit |
209cc3 |
* pcap_activate() succeeded, but it's warning us
|
|
Packit |
209cc3 |
* of a problem it had.
|
|
Packit |
209cc3 |
*/
|
|
Packit |
209cc3 |
warning("%s: %s\n(%s)", device,
|
|
Packit |
209cc3 |
pcap_statustostr(status), pcap_geterr(pd));
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
if (pcap_lookupnet(device, &localnet, &netmask, ebuf) < 0) {
|
|
Packit |
209cc3 |
localnet = 0;
|
|
Packit |
209cc3 |
netmask = 0;
|
|
Packit |
209cc3 |
warning("%s", ebuf);
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
cmdbuf = copy_argv(&argv[optind]);
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
if (pcap_compile(pd, &fcode, cmdbuf, 1, netmask) < 0)
|
|
Packit |
209cc3 |
error("%s", pcap_geterr(pd));
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
if (pcap_setfilter(pd, &fcode) < 0)
|
|
Packit |
209cc3 |
error("%s", pcap_geterr(pd));
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
#ifdef _WIN32
|
|
Packit |
209cc3 |
capture_thread = CreateThread(NULL, 0, capture_thread_func, device,
|
|
Packit |
209cc3 |
0, NULL);
|
|
Packit |
209cc3 |
if (capture_thread == NULL)
|
|
Packit |
209cc3 |
error("Can't create capture thread: %s",
|
|
Packit |
209cc3 |
win32_strerror(GetLastError()));
|
|
Packit |
209cc3 |
#else
|
|
Packit |
209cc3 |
status = pthread_create(&capture_thread, NULL, capture_thread_func,
|
|
Packit |
209cc3 |
device);
|
|
Packit |
209cc3 |
if (status != 0)
|
|
Packit |
209cc3 |
error("Can't create capture thread: %s", strerror(status));
|
|
Packit |
209cc3 |
#endif
|
|
Packit |
209cc3 |
sleep_secs(60);
|
|
Packit |
209cc3 |
pcap_breakloop(pd);
|
|
Packit |
209cc3 |
#ifdef _WIN32
|
|
Packit |
209cc3 |
printf("Setting event\n");
|
|
Packit |
209cc3 |
if (!SetEvent(pcap_getevent(pd)))
|
|
Packit |
209cc3 |
error("Can't set event for pcap_t: %s",
|
|
Packit |
209cc3 |
win32_strerror(GetLastError()));
|
|
Packit |
209cc3 |
if (WaitForSingleObject(capture_thread, INFINITE) == WAIT_FAILED)
|
|
Packit |
209cc3 |
error("Wait for thread termination failed: %s",
|
|
Packit |
209cc3 |
win32_strerror(GetLastError()));
|
|
Packit |
209cc3 |
CloseHandle(capture_thread);
|
|
Packit |
209cc3 |
#else
|
|
Packit |
209cc3 |
printf("Sending SIGUSR1\n");
|
|
Packit |
209cc3 |
status = pthread_kill(capture_thread, SIGUSR1);
|
|
Packit |
209cc3 |
if (status != 0)
|
|
Packit |
209cc3 |
warning("Can't interrupt capture thread: %s", strerror(status));
|
|
Packit |
209cc3 |
status = pthread_join(capture_thread, &retval);
|
|
Packit |
209cc3 |
if (status != 0)
|
|
Packit |
209cc3 |
error("Wait for thread termination failed: %s",
|
|
Packit |
209cc3 |
strerror(status));
|
|
Packit |
209cc3 |
#endif
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
pcap_close(pd);
|
|
Packit |
209cc3 |
pcap_freecode(&fcode);
|
|
Packit |
209cc3 |
exit(status == -1 ? 1 : 0);
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
static void
|
|
Packit |
209cc3 |
countme(u_char *user, const struct pcap_pkthdr *h _U_, const u_char *sp _U_)
|
|
Packit |
209cc3 |
{
|
|
Packit |
209cc3 |
int *counterp = (int *)user;
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
(*counterp)++;
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
static void
|
|
Packit |
209cc3 |
usage(void)
|
|
Packit |
209cc3 |
{
|
|
Packit |
209cc3 |
(void)fprintf(stderr, "Usage: %s [ -m ] [ -i interface ] [ -t timeout] [expression]\n",
|
|
Packit |
209cc3 |
program_name);
|
|
Packit |
209cc3 |
exit(1);
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
/* VARARGS */
|
|
Packit |
209cc3 |
static void
|
|
Packit |
209cc3 |
error(const char *fmt, ...)
|
|
Packit |
209cc3 |
{
|
|
Packit |
209cc3 |
va_list ap;
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
(void)fprintf(stderr, "%s: ", program_name);
|
|
Packit |
209cc3 |
va_start(ap, fmt);
|
|
Packit |
209cc3 |
(void)vfprintf(stderr, fmt, ap);
|
|
Packit |
209cc3 |
va_end(ap);
|
|
Packit |
209cc3 |
if (*fmt) {
|
|
Packit |
209cc3 |
fmt += strlen(fmt);
|
|
Packit |
209cc3 |
if (fmt[-1] != '\n')
|
|
Packit |
209cc3 |
(void)fputc('\n', stderr);
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
exit(1);
|
|
Packit |
209cc3 |
/* NOTREACHED */
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
/* VARARGS */
|
|
Packit |
209cc3 |
static void
|
|
Packit |
209cc3 |
warning(const char *fmt, ...)
|
|
Packit |
209cc3 |
{
|
|
Packit |
209cc3 |
va_list ap;
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
(void)fprintf(stderr, "%s: WARNING: ", program_name);
|
|
Packit |
209cc3 |
va_start(ap, fmt);
|
|
Packit |
209cc3 |
(void)vfprintf(stderr, fmt, ap);
|
|
Packit |
209cc3 |
va_end(ap);
|
|
Packit |
209cc3 |
if (*fmt) {
|
|
Packit |
209cc3 |
fmt += strlen(fmt);
|
|
Packit |
209cc3 |
if (fmt[-1] != '\n')
|
|
Packit |
209cc3 |
(void)fputc('\n', stderr);
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
/*
|
|
Packit |
209cc3 |
* Copy arg vector into a new buffer, concatenating arguments with spaces.
|
|
Packit |
209cc3 |
*/
|
|
Packit |
209cc3 |
static char *
|
|
Packit |
209cc3 |
copy_argv(register char **argv)
|
|
Packit |
209cc3 |
{
|
|
Packit |
209cc3 |
register char **p;
|
|
Packit |
209cc3 |
register u_int len = 0;
|
|
Packit |
209cc3 |
char *buf;
|
|
Packit |
209cc3 |
char *src, *dst;
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
p = argv;
|
|
Packit |
209cc3 |
if (*p == 0)
|
|
Packit |
209cc3 |
return 0;
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
while (*p)
|
|
Packit |
209cc3 |
len += strlen(*p++) + 1;
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
buf = (char *)malloc(len);
|
|
Packit |
209cc3 |
if (buf == NULL)
|
|
Packit |
209cc3 |
error("copy_argv: malloc");
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
p = argv;
|
|
Packit |
209cc3 |
dst = buf;
|
|
Packit |
209cc3 |
while ((src = *p++) != NULL) {
|
|
Packit |
209cc3 |
while ((*dst++ = *src++) != '\0')
|
|
Packit |
209cc3 |
;
|
|
Packit |
209cc3 |
dst[-1] = ' ';
|
|
Packit |
209cc3 |
}
|
|
Packit |
209cc3 |
dst[-1] = '\0';
|
|
Packit |
209cc3 |
|
|
Packit |
209cc3 |
return buf;
|
|
Packit |
209cc3 |
}
|