2644 lines
66 KiB
C
2644 lines
66 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Support for splitting captures into multiple files with a maximum
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* file size:
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*
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* Copyright (c) 2001
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* Seth Webster <swebster@sst.ll.mit.edu>
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*/
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#ifndef lint
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static const char copyright[] _U_ =
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"@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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/* $FreeBSD$ */
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/*
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* tcpdump - monitor tcp/ip traffic on an ethernet.
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*
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* First written in 1987 by Van Jacobson, Lawrence Berkeley Laboratory.
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* Mercilessly hacked and occasionally improved since then via the
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* combined efforts of Van, Steve McCanne and Craig Leres of LBL.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#ifdef WIN32
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#include "w32_fzs.h"
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extern int strcasecmp (const char *__s1, const char *__s2);
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extern int SIZE_BUF;
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#define off_t long
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#define uint UINT
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#endif /* WIN32 */
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#ifdef USE_LIBSMI
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#include <smi.h>
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#endif
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#ifdef HAVE_LIBCRYPTO
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#include <openssl/crypto.h>
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#endif
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#ifdef HAVE_GETOPT_LONG
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#include <getopt.h>
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#else
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#include "getopt_long.h"
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#endif
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#include <pcap.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#ifdef __FreeBSD__
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#include <sys/capsicum.h>
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#include <sys/sysctl.h>
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#endif /* __FreeBSD__ */
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#ifdef HAVE_CAPSICUM
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#include <libcapsicum.h>
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#include <libcapsicum_dns.h>
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#include <libcapsicum_service.h>
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#include <nv.h>
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#include <sys/capability.h>
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#include <sys/ioccom.h>
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#include <net/bpf.h>
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#include <fcntl.h>
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#include <libgen.h>
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#endif /* HAVE_CAPSICUM */
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#ifndef WIN32
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#include <sys/wait.h>
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#include <sys/resource.h>
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#include <pwd.h>
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#include <grp.h>
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#endif /* WIN32 */
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/* capabilities convinience library */
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#ifdef HAVE_CAP_NG_H
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#include <cap-ng.h>
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#endif /* HAVE_CAP_NG_H */
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#include "netdissect.h"
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#include "interface.h"
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#include "addrtoname.h"
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#include "machdep.h"
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#include "setsignal.h"
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#include "gmt2local.h"
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#include "pcap-missing.h"
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#ifndef PATH_MAX
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#define PATH_MAX 1024
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#endif
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#ifdef SIGINFO
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#define SIGNAL_REQ_INFO SIGINFO
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#elif SIGUSR1
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#define SIGNAL_REQ_INFO SIGUSR1
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#endif
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netdissect_options Gndo;
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netdissect_options *gndo = &Gndo;
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static int Dflag; /* list available devices and exit */
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static int dflag; /* print filter code */
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static int Lflag; /* list available data link types and exit */
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#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
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static int Jflag; /* list available time stamp types */
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#endif
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#ifdef HAVE_PCAP_SETDIRECTION
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int Qflag = -1; /* restrict captured packet by send/receive direction */
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#endif
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static char *zflag = NULL; /* compress each savefile using a specified command (like gzip or bzip2) */
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static int infodelay;
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static int infoprint;
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char *program_name;
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#ifdef HAVE_CAPSICUM
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cap_channel_t *capdns;
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#endif
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int32_t thiszone; /* seconds offset from gmt to local time */
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/* Forwards */
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static RETSIGTYPE cleanup(int);
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static RETSIGTYPE child_cleanup(int);
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static void print_version(void);
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static void print_usage(void);
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static void show_dlts_and_exit(const char *device, pcap_t *pd) __attribute__((noreturn));
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static void print_packet(u_char *, const struct pcap_pkthdr *, const u_char *);
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static void ndo_default_print(netdissect_options *, const u_char *, u_int);
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static void dump_packet_and_trunc(u_char *, const struct pcap_pkthdr *, const u_char *);
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static void dump_packet(u_char *, const struct pcap_pkthdr *, const u_char *);
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static void droproot(const char *, const char *);
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static void ndo_error(netdissect_options *ndo, const char *fmt, ...)
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__attribute__((noreturn))
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#ifdef __ATTRIBUTE___FORMAT_OK
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__attribute__((format (printf, 2, 3)))
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#endif /* __ATTRIBUTE___FORMAT_OK */
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;
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static void ndo_warning(netdissect_options *ndo, const char *fmt, ...)
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#ifdef __ATTRIBUTE___FORMAT_OK
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__attribute__((format (printf, 2, 3)))
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#endif /* __ATTRIBUTE___FORMAT_OK */
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;
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#ifdef SIGNAL_REQ_INFO
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RETSIGTYPE requestinfo(int);
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#endif
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#if defined(USE_WIN32_MM_TIMER)
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#include <MMsystem.h>
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static UINT timer_id;
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static void CALLBACK verbose_stats_dump(UINT, UINT, DWORD_PTR, DWORD_PTR, DWORD_PTR);
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#elif defined(HAVE_ALARM)
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static void verbose_stats_dump(int sig);
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#endif
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static void info(int);
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static u_int packets_captured;
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struct printer {
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if_printer f;
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int type;
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};
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struct ndo_printer {
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if_ndo_printer f;
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int type;
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};
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static const struct printer printers[] = {
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{ NULL, 0 },
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};
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static const struct ndo_printer ndo_printers[] = {
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{ ether_if_print, DLT_EN10MB },
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#ifdef DLT_IPNET
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{ ipnet_if_print, DLT_IPNET },
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#endif
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#ifdef DLT_IEEE802_15_4
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{ ieee802_15_4_if_print, DLT_IEEE802_15_4 },
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#endif
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#ifdef DLT_IEEE802_15_4_NOFCS
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{ ieee802_15_4_if_print, DLT_IEEE802_15_4_NOFCS },
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#endif
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#ifdef DLT_PPI
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{ ppi_if_print, DLT_PPI },
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#endif
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#ifdef DLT_NETANALYZER
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{ netanalyzer_if_print, DLT_NETANALYZER },
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#endif
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#ifdef DLT_NETANALYZER_TRANSPARENT
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{ netanalyzer_transparent_if_print, DLT_NETANALYZER_TRANSPARENT },
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#endif
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#if defined(DLT_NFLOG) && defined(HAVE_PCAP_NFLOG_H)
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{ nflog_if_print, DLT_NFLOG},
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#endif
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#ifdef DLT_CIP
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{ cip_if_print, DLT_CIP },
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#endif
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#ifdef DLT_ATM_CLIP
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{ cip_if_print, DLT_ATM_CLIP },
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#endif
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#ifdef DLT_IP_OVER_FC
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{ ipfc_if_print, DLT_IP_OVER_FC },
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#endif
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{ null_if_print, DLT_NULL },
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#ifdef DLT_LOOP
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{ null_if_print, DLT_LOOP },
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#endif
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#ifdef DLT_APPLE_IP_OVER_IEEE1394
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{ ap1394_if_print, DLT_APPLE_IP_OVER_IEEE1394 },
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#endif
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#if defined(DLT_BLUETOOTH_HCI_H4_WITH_PHDR) && defined(HAVE_PCAP_BLUETOOTH_H)
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{ bt_if_print, DLT_BLUETOOTH_HCI_H4_WITH_PHDR},
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#endif
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#ifdef DLT_LANE8023
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{ lane_if_print, DLT_LANE8023 },
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#endif
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{ arcnet_if_print, DLT_ARCNET },
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#ifdef DLT_ARCNET_LINUX
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{ arcnet_linux_if_print, DLT_ARCNET_LINUX },
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#endif
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{ raw_if_print, DLT_RAW },
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#ifdef DLT_IPV4
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{ raw_if_print, DLT_IPV4 },
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#endif
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#ifdef DLT_IPV6
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{ raw_if_print, DLT_IPV6 },
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#endif
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#ifdef HAVE_PCAP_USB_H
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#ifdef DLT_USB_LINUX
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{ usb_linux_48_byte_print, DLT_USB_LINUX},
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#endif /* DLT_USB_LINUX */
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#ifdef DLT_USB_LINUX_MMAPPED
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{ usb_linux_64_byte_print, DLT_USB_LINUX_MMAPPED},
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#endif /* DLT_USB_LINUX_MMAPPED */
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#endif /* HAVE_PCAP_USB_H */
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#ifdef DLT_SYMANTEC_FIREWALL
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{ symantec_if_print, DLT_SYMANTEC_FIREWALL },
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#endif
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#ifdef DLT_C_HDLC
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{ chdlc_if_print, DLT_C_HDLC },
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#endif
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#ifdef DLT_HDLC
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{ chdlc_if_print, DLT_HDLC },
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#endif
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#ifdef DLT_PPP_ETHER
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{ pppoe_if_print, DLT_PPP_ETHER },
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#endif
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#if defined(DLT_PFLOG) && defined(HAVE_NET_PFVAR_H)
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{ pflog_if_print, DLT_PFLOG },
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#endif
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{ token_if_print, DLT_IEEE802 },
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{ fddi_if_print, DLT_FDDI },
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#ifdef DLT_LINUX_SLL
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{ sll_if_print, DLT_LINUX_SLL },
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#endif
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#ifdef DLT_FR
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{ fr_if_print, DLT_FR },
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#endif
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#ifdef DLT_FRELAY
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{ fr_if_print, DLT_FRELAY },
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#endif
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#ifdef DLT_MFR
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{ mfr_if_print, DLT_MFR },
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#endif
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{ atm_if_print, DLT_ATM_RFC1483 },
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#ifdef DLT_SUNATM
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{ sunatm_if_print, DLT_SUNATM },
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#endif
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#ifdef DLT_ENC
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{ enc_if_print, DLT_ENC },
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#endif
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{ sl_if_print, DLT_SLIP },
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#ifdef DLT_SLIP_BSDOS
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{ sl_bsdos_if_print, DLT_SLIP_BSDOS },
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#endif
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#ifdef DLT_LTALK
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{ ltalk_if_print, DLT_LTALK },
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#endif
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#ifdef DLT_JUNIPER_ATM1
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{ juniper_atm1_print, DLT_JUNIPER_ATM1 },
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#endif
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#ifdef DLT_JUNIPER_ATM2
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{ juniper_atm2_print, DLT_JUNIPER_ATM2 },
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#endif
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#ifdef DLT_JUNIPER_MFR
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{ juniper_mfr_print, DLT_JUNIPER_MFR },
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#endif
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#ifdef DLT_JUNIPER_MLFR
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{ juniper_mlfr_print, DLT_JUNIPER_MLFR },
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#endif
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#ifdef DLT_JUNIPER_MLPPP
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{ juniper_mlppp_print, DLT_JUNIPER_MLPPP },
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#endif
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#ifdef DLT_JUNIPER_PPPOE
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{ juniper_pppoe_print, DLT_JUNIPER_PPPOE },
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#endif
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#ifdef DLT_JUNIPER_PPPOE_ATM
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{ juniper_pppoe_atm_print, DLT_JUNIPER_PPPOE_ATM },
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#endif
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#ifdef DLT_JUNIPER_GGSN
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{ juniper_ggsn_print, DLT_JUNIPER_GGSN },
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#endif
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#ifdef DLT_JUNIPER_ES
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{ juniper_es_print, DLT_JUNIPER_ES },
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#endif
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#ifdef DLT_JUNIPER_MONITOR
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{ juniper_monitor_print, DLT_JUNIPER_MONITOR },
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#endif
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#ifdef DLT_JUNIPER_SERVICES
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{ juniper_services_print, DLT_JUNIPER_SERVICES },
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#endif
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#ifdef DLT_JUNIPER_ETHER
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{ juniper_ether_print, DLT_JUNIPER_ETHER },
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#endif
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#ifdef DLT_JUNIPER_PPP
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{ juniper_ppp_print, DLT_JUNIPER_PPP },
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#endif
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#ifdef DLT_JUNIPER_FRELAY
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{ juniper_frelay_print, DLT_JUNIPER_FRELAY },
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#endif
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#ifdef DLT_JUNIPER_CHDLC
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{ juniper_chdlc_print, DLT_JUNIPER_CHDLC },
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#endif
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#ifdef DLT_PKTAP
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{ pktap_if_print, DLT_PKTAP },
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#endif
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#ifdef DLT_IEEE802_11_RADIO
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{ ieee802_11_radio_if_print, DLT_IEEE802_11_RADIO },
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#endif
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#ifdef DLT_IEEE802_11
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{ ieee802_11_if_print, DLT_IEEE802_11},
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#endif
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#ifdef DLT_IEEE802_11_RADIO_AVS
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{ ieee802_11_radio_avs_if_print, DLT_IEEE802_11_RADIO_AVS },
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#endif
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#ifdef DLT_PRISM_HEADER
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{ prism_if_print, DLT_PRISM_HEADER },
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#endif
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{ ppp_if_print, DLT_PPP },
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#ifdef DLT_PPP_WITHDIRECTION
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{ ppp_if_print, DLT_PPP_WITHDIRECTION },
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#endif
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#ifdef DLT_PPP_BSDOS
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{ ppp_bsdos_if_print, DLT_PPP_BSDOS },
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#endif
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#ifdef DLT_PPP_SERIAL
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{ ppp_hdlc_if_print, DLT_PPP_SERIAL },
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#endif
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{ NULL, 0 },
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};
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static const struct tok status_flags[] = {
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#ifdef PCAP_IF_UP
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{ PCAP_IF_UP, "Up" },
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#endif
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#ifdef PCAP_IF_RUNNING
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{ PCAP_IF_RUNNING, "Running" },
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#endif
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{ PCAP_IF_LOOPBACK, "Loopback" },
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{ 0, NULL }
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};
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if_printer
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lookup_printer(int type)
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{
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const struct printer *p;
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for (p = printers; p->f; ++p)
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if (type == p->type)
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return p->f;
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return NULL;
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/* NOTREACHED */
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}
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if_ndo_printer
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lookup_ndo_printer(int type)
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{
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const struct ndo_printer *p;
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for (p = ndo_printers; p->f; ++p)
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if (type == p->type)
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return p->f;
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#if defined(DLT_USER2) && defined(DLT_PKTAP)
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/*
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* Apple incorrectly chose to use DLT_USER2 for their PKTAP
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* header.
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*
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* We map DLT_PKTAP, whether it's DLT_USER2 as it is on Darwin-
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* based OSes or the same value as LINKTYPE_PKTAP as it is on
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* other OSes, to LINKTYPE_PKTAP, so files written with
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* this version of libpcap for a DLT_PKTAP capture have a link-
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* layer header type of LINKTYPE_PKTAP.
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*
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* However, files written on OS X Mavericks for a DLT_PKTAP
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* capture have a link-layer header type of LINKTYPE_USER2.
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* If we don't have a printer for DLT_USER2, and type is
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* DLT_USER2, we look up the printer for DLT_PKTAP and use
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* that.
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*/
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if (type == DLT_USER2) {
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for (p = ndo_printers; p->f; ++p)
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if (DLT_PKTAP == p->type)
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return p->f;
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}
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#endif
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return NULL;
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/* NOTREACHED */
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}
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static pcap_t *pd;
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static int supports_monitor_mode;
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extern int optind;
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extern int opterr;
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extern char *optarg;
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struct print_info {
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netdissect_options *ndo;
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union {
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if_printer printer;
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if_ndo_printer ndo_printer;
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} p;
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int ndo_type;
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};
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struct dump_info {
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char *WFileName;
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char *CurrentFileName;
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pcap_t *pd;
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pcap_dumper_t *p;
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#ifdef HAVE_CAPSICUM
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int dirfd;
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#endif
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};
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#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
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static void
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show_tstamp_types_and_exit(const char *device, pcap_t *pd)
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{
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int n_tstamp_types;
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int *tstamp_types = 0;
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const char *tstamp_type_name;
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int i;
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n_tstamp_types = pcap_list_tstamp_types(pd, &tstamp_types);
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if (n_tstamp_types < 0)
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error("%s", pcap_geterr(pd));
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if (n_tstamp_types == 0) {
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fprintf(stderr, "Time stamp type cannot be set for %s\n",
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device);
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exit(0);
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}
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fprintf(stderr, "Time stamp types for %s (use option -j to set):\n",
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device);
|
|
for (i = 0; i < n_tstamp_types; i++) {
|
|
tstamp_type_name = pcap_tstamp_type_val_to_name(tstamp_types[i]);
|
|
if (tstamp_type_name != NULL) {
|
|
(void) fprintf(stderr, " %s (%s)\n", tstamp_type_name,
|
|
pcap_tstamp_type_val_to_description(tstamp_types[i]));
|
|
} else {
|
|
(void) fprintf(stderr, " %d\n", tstamp_types[i]);
|
|
}
|
|
}
|
|
pcap_free_tstamp_types(tstamp_types);
|
|
exit(0);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
show_dlts_and_exit(const char *device, pcap_t *pd)
|
|
{
|
|
int n_dlts;
|
|
int *dlts = 0;
|
|
const char *dlt_name;
|
|
|
|
n_dlts = pcap_list_datalinks(pd, &dlts);
|
|
if (n_dlts < 0)
|
|
error("%s", pcap_geterr(pd));
|
|
else if (n_dlts == 0 || !dlts)
|
|
error("No data link types.");
|
|
|
|
/*
|
|
* If the interface is known to support monitor mode, indicate
|
|
* whether these are the data link types available when not in
|
|
* monitor mode, if -I wasn't specified, or when in monitor mode,
|
|
* when -I was specified (the link-layer types available in
|
|
* monitor mode might be different from the ones available when
|
|
* not in monitor mode).
|
|
*/
|
|
if (supports_monitor_mode)
|
|
(void) fprintf(stderr, "Data link types for %s %s (use option -y to set):\n",
|
|
device,
|
|
Iflag ? "when in monitor mode" : "when not in monitor mode");
|
|
else
|
|
(void) fprintf(stderr, "Data link types for %s (use option -y to set):\n",
|
|
device);
|
|
|
|
while (--n_dlts >= 0) {
|
|
dlt_name = pcap_datalink_val_to_name(dlts[n_dlts]);
|
|
if (dlt_name != NULL) {
|
|
(void) fprintf(stderr, " %s (%s)", dlt_name,
|
|
pcap_datalink_val_to_description(dlts[n_dlts]));
|
|
|
|
/*
|
|
* OK, does tcpdump handle that type?
|
|
*/
|
|
if (lookup_printer(dlts[n_dlts]) == NULL
|
|
&& lookup_ndo_printer(dlts[n_dlts]) == NULL)
|
|
(void) fprintf(stderr, " (printing not supported)");
|
|
fprintf(stderr, "\n");
|
|
} else {
|
|
(void) fprintf(stderr, " DLT %d (printing not supported)\n",
|
|
dlts[n_dlts]);
|
|
}
|
|
}
|
|
#ifdef HAVE_PCAP_FREE_DATALINKS
|
|
pcap_free_datalinks(dlts);
|
|
#endif
|
|
exit(0);
|
|
}
|
|
|
|
#ifdef HAVE_PCAP_FINDALLDEVS
|
|
static void
|
|
show_devices_and_exit (void)
|
|
{
|
|
pcap_if_t *devpointer;
|
|
char ebuf[PCAP_ERRBUF_SIZE];
|
|
int i;
|
|
|
|
if (pcap_findalldevs(&devpointer, ebuf) < 0)
|
|
error("%s", ebuf);
|
|
else {
|
|
for (i = 0; devpointer != NULL; i++) {
|
|
printf("%d.%s", i+1, devpointer->name);
|
|
if (devpointer->description != NULL)
|
|
printf(" (%s)", devpointer->description);
|
|
if (devpointer->flags != 0)
|
|
printf(" [%s]", bittok2str(status_flags, "none", devpointer->flags));
|
|
printf("\n");
|
|
devpointer = devpointer->next;
|
|
}
|
|
}
|
|
exit(0);
|
|
}
|
|
#endif /* HAVE_PCAP_FINDALLDEVS */
|
|
|
|
/*
|
|
* Short options.
|
|
*
|
|
* Note that there we use all letters for short options except for g, k,
|
|
* o, and P, and those are used by other versions of tcpdump, and we should
|
|
* only use them for the same purposes that the other versions of tcpdump
|
|
* use them:
|
|
*
|
|
* OS X tcpdump uses -g to force non--v output for IP to be on one
|
|
* line, making it more "g"repable;
|
|
*
|
|
* OS X tcpdump uses -k tospecify that packet comments in pcap-ng files
|
|
* should be printed;
|
|
*
|
|
* OpenBSD tcpdump uses -o to indicate that OS fingerprinting should be done
|
|
* for hosts sending TCP SYN packets;
|
|
*
|
|
* OS X tcpdump uses -P to indicate that -w should write pcap-ng rather
|
|
* than pcap files.
|
|
*/
|
|
|
|
/*
|
|
* Set up flags that might or might not be supported depending on the
|
|
* version of libpcap we're using.
|
|
*/
|
|
#if defined(HAVE_PCAP_CREATE) || defined(WIN32)
|
|
#define B_FLAG "B:"
|
|
#define B_FLAG_USAGE " [ -B size ]"
|
|
#else /* defined(HAVE_PCAP_CREATE) || defined(WIN32) */
|
|
#define B_FLAG
|
|
#define B_FLAG_USAGE
|
|
#endif /* defined(HAVE_PCAP_CREATE) || defined(WIN32) */
|
|
|
|
#ifdef HAVE_PCAP_CREATE
|
|
#define I_FLAG "I"
|
|
#else /* HAVE_PCAP_CREATE */
|
|
#define I_FLAG
|
|
#endif /* HAVE_PCAP_CREATE */
|
|
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
|
|
#define j_FLAG "j:"
|
|
#define j_FLAG_USAGE " [ -j tstamptype ]"
|
|
#define J_FLAG "J"
|
|
#else /* PCAP_ERROR_TSTAMP_TYPE_NOTSUP */
|
|
#define j_FLAG
|
|
#define j_FLAG_USAGE
|
|
#define J_FLAG
|
|
#endif /* PCAP_ERROR_TSTAMP_TYPE_NOTSUP */
|
|
|
|
#ifdef HAVE_PCAP_FINDALLDEVS
|
|
#ifndef HAVE_PCAP_IF_T
|
|
#undef HAVE_PCAP_FINDALLDEVS
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef HAVE_PCAP_FINDALLDEVS
|
|
#define D_FLAG "D"
|
|
#else
|
|
#define D_FLAG
|
|
#endif
|
|
|
|
#ifdef HAVE_PCAP_DUMP_FLUSH
|
|
#define U_FLAG "U"
|
|
#else
|
|
#define U_FLAG
|
|
#endif
|
|
|
|
#ifdef HAVE_PCAP_SETDIRECTION
|
|
#define Q_FLAG "Q:"
|
|
#else
|
|
#define Q_FLAG
|
|
#endif
|
|
|
|
/*
|
|
* Long options.
|
|
*
|
|
* We do not currently have long options corresponding to all short
|
|
* options; we should probably pick appropriate option names for them.
|
|
*
|
|
* However, the short options where the number of times the option is
|
|
* specified matters, such as -v and -d and -t, should probably not
|
|
* just map to a long option, as saying
|
|
*
|
|
* tcpdump --verbose --verbose
|
|
*
|
|
* doesn't make sense; it should be --verbosity={N} or something such
|
|
* as that.
|
|
*
|
|
* For long options with no corresponding short options, we define values
|
|
* outside the range of ASCII graphic characters, make that the last
|
|
* component of the entry for the long option, and have a case for that
|
|
* option in the switch statement.
|
|
*/
|
|
#define OPTION_VERSION 128
|
|
#define OPTION_TSTAMP_PRECISION 129
|
|
|
|
static const struct option longopts[] = {
|
|
#if defined(HAVE_PCAP_CREATE) || defined(WIN32)
|
|
{ "buffer-size", required_argument, NULL, 'B' },
|
|
#endif
|
|
{ "list-interfaces", no_argument, NULL, 'D' },
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ "interface", required_argument, NULL, 'i' },
|
|
#ifdef HAVE_PCAP_CREATE
|
|
{ "monitor-mode", no_argument, NULL, 'I' },
|
|
#endif
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
|
|
{ "time-stamp-type", required_argument, NULL, 'j' },
|
|
{ "list-time-stamp-types", no_argument, NULL, 'J' },
|
|
#endif
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
|
|
{ "time-stamp-precision", required_argument, NULL, OPTION_TSTAMP_PRECISION},
|
|
#endif
|
|
{ "dont-verify-checksums", no_argument, NULL, 'K' },
|
|
{ "list-data-link-types", no_argument, NULL, 'L' },
|
|
{ "no-optimize", no_argument, NULL, 'O' },
|
|
{ "no-promiscuous-mode", no_argument, NULL, 'p' },
|
|
#ifdef HAVE_PCAP_SETDIRECTION
|
|
{ "direction", required_argument, NULL, 'Q' },
|
|
#endif
|
|
{ "snapshot-length", required_argument, NULL, 's' },
|
|
{ "absolute-tcp-sequence-numbers", no_argument, NULL, 'S' },
|
|
#ifdef HAVE_PCAP_DUMP_FLUSH
|
|
{ "packet-buffered", no_argument, NULL, 'U' },
|
|
#endif
|
|
{ "linktype", required_argument, NULL, 'y' },
|
|
#if defined(HAVE_PCAP_DEBUG) || defined(HAVE_YYDEBUG)
|
|
{ "debug-filter-parser", no_argument, NULL, 'Y' },
|
|
#endif
|
|
{ "relinquish-privileges", required_argument, NULL, 'Z' },
|
|
{ "number", no_argument, NULL, '#' },
|
|
{ "version", no_argument, NULL, OPTION_VERSION },
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
#ifndef WIN32
|
|
/* Drop root privileges and chroot if necessary */
|
|
static void
|
|
droproot(const char *username, const char *chroot_dir)
|
|
{
|
|
struct passwd *pw = NULL;
|
|
|
|
if (chroot_dir && !username) {
|
|
fprintf(stderr, "tcpdump: Chroot without dropping root is insecure\n");
|
|
exit(1);
|
|
}
|
|
|
|
pw = getpwnam(username);
|
|
if (pw) {
|
|
if (chroot_dir) {
|
|
if (chroot(chroot_dir) != 0 || chdir ("/") != 0) {
|
|
fprintf(stderr, "tcpdump: Couldn't chroot/chdir to '%.64s': %s\n",
|
|
chroot_dir, pcap_strerror(errno));
|
|
exit(1);
|
|
}
|
|
}
|
|
#ifdef HAVE_CAP_NG_H
|
|
int ret = capng_change_id(pw->pw_uid, pw->pw_gid, CAPNG_NO_FLAG);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "error : ret %d\n", ret);
|
|
}
|
|
else {
|
|
printf("dropped privs to %s\n", username);
|
|
}
|
|
/* We don't need CAP_SETUID and CAP_SETGID */
|
|
capng_update(CAPNG_DROP, CAPNG_EFFECTIVE, CAP_SETUID);
|
|
capng_update(CAPNG_DROP, CAPNG_EFFECTIVE, CAP_SETUID);
|
|
capng_update(CAPNG_DROP, CAPNG_PERMITTED, CAP_SETUID);
|
|
capng_update(CAPNG_DROP, CAPNG_PERMITTED, CAP_SETUID);
|
|
capng_apply(CAPNG_SELECT_BOTH);
|
|
|
|
#else
|
|
if (initgroups(pw->pw_name, pw->pw_gid) != 0 ||
|
|
setgid(pw->pw_gid) != 0 || setuid(pw->pw_uid) != 0) {
|
|
fprintf(stderr, "tcpdump: Couldn't change to '%.32s' uid=%lu gid=%lu: %s\n",
|
|
username,
|
|
(unsigned long)pw->pw_uid,
|
|
(unsigned long)pw->pw_gid,
|
|
pcap_strerror(errno));
|
|
exit(1);
|
|
}
|
|
else {
|
|
printf("dropped privs to %s\n", username);
|
|
}
|
|
#endif /* HAVE_CAP_NG_H */
|
|
}
|
|
else {
|
|
fprintf(stderr, "tcpdump: Couldn't find user '%.32s'\n",
|
|
username);
|
|
exit(1);
|
|
}
|
|
}
|
|
#endif /* WIN32 */
|
|
|
|
static int
|
|
getWflagChars(int x)
|
|
{
|
|
int c = 0;
|
|
|
|
x -= 1;
|
|
while (x > 0) {
|
|
c += 1;
|
|
x /= 10;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
|
|
static void
|
|
MakeFilename(char *buffer, char *orig_name, int cnt, int max_chars)
|
|
{
|
|
char *filename = malloc(PATH_MAX + 1);
|
|
if (filename == NULL)
|
|
error("Makefilename: malloc");
|
|
|
|
/* Process with strftime if Gflag is set. */
|
|
if (Gflag != 0) {
|
|
struct tm *local_tm;
|
|
|
|
/* Convert Gflag_time to a usable format */
|
|
if ((local_tm = localtime(&Gflag_time)) == NULL) {
|
|
error("MakeTimedFilename: localtime");
|
|
}
|
|
|
|
/* There's no good way to detect an error in strftime since a return
|
|
* value of 0 isn't necessarily failure.
|
|
*/
|
|
strftime(filename, PATH_MAX, orig_name, local_tm);
|
|
} else {
|
|
strncpy(filename, orig_name, PATH_MAX);
|
|
}
|
|
|
|
if (cnt == 0 && max_chars == 0)
|
|
strncpy(buffer, filename, PATH_MAX + 1);
|
|
else
|
|
if (snprintf(buffer, PATH_MAX + 1, "%s%0*d", filename, max_chars, cnt) > PATH_MAX)
|
|
/* Report an error if the filename is too large */
|
|
error("too many output files or filename is too long (> %d)", PATH_MAX);
|
|
free(filename);
|
|
}
|
|
|
|
static int tcpdump_printf(netdissect_options *ndo _U_,
|
|
const char *fmt, ...)
|
|
{
|
|
|
|
va_list args;
|
|
int ret;
|
|
|
|
va_start(args, fmt);
|
|
ret=vfprintf(stdout, fmt, args);
|
|
va_end(args);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct print_info
|
|
get_print_info(int type)
|
|
{
|
|
struct print_info printinfo;
|
|
|
|
printinfo.ndo_type = 1;
|
|
printinfo.ndo = gndo;
|
|
printinfo.p.ndo_printer = lookup_ndo_printer(type);
|
|
if (printinfo.p.ndo_printer == NULL) {
|
|
printinfo.p.printer = lookup_printer(type);
|
|
printinfo.ndo_type = 0;
|
|
if (printinfo.p.printer == NULL) {
|
|
gndo->ndo_dltname = pcap_datalink_val_to_name(type);
|
|
if (gndo->ndo_dltname != NULL)
|
|
error("packet printing is not supported for link type %s: use -w",
|
|
gndo->ndo_dltname);
|
|
else
|
|
error("packet printing is not supported for link type %d: use -w", type);
|
|
}
|
|
}
|
|
return (printinfo);
|
|
}
|
|
|
|
static char *
|
|
get_next_file(FILE *VFile, char *ptr)
|
|
{
|
|
char *ret;
|
|
|
|
ret = fgets(ptr, PATH_MAX, VFile);
|
|
if (!ret)
|
|
return NULL;
|
|
|
|
if (ptr[strlen(ptr) - 1] == '\n')
|
|
ptr[strlen(ptr) - 1] = '\0';
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef HAVE_CAPSICUM
|
|
static cap_channel_t *
|
|
capdns_setup(void)
|
|
{
|
|
cap_channel_t *capcas, *capdnsloc;
|
|
const char *types[1];
|
|
int families[2];
|
|
|
|
capcas = cap_init();
|
|
if (capcas == NULL) {
|
|
warning("unable to contact casperd");
|
|
return (NULL);
|
|
}
|
|
capdnsloc = cap_service_open(capcas, "system.dns");
|
|
/* Casper capability no longer needed. */
|
|
cap_close(capcas);
|
|
if (capdnsloc == NULL)
|
|
error("unable to open system.dns service");
|
|
/* Limit system.dns to reverse DNS lookups. */
|
|
types[0] = "ADDR";
|
|
if (cap_dns_type_limit(capdnsloc, types, 1) < 0)
|
|
error("unable to limit access to system.dns service");
|
|
families[0] = AF_INET;
|
|
families[1] = AF_INET6;
|
|
if (cap_dns_family_limit(capdnsloc, families, 2) < 0)
|
|
error("unable to limit access to system.dns service");
|
|
|
|
return (capdnsloc);
|
|
}
|
|
#endif /* HAVE_CAPSICUM */
|
|
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
|
|
static int
|
|
tstamp_precision_from_string(const char *precision)
|
|
{
|
|
if (strncmp(precision, "nano", strlen("nano")) == 0)
|
|
return PCAP_TSTAMP_PRECISION_NANO;
|
|
|
|
if (strncmp(precision, "micro", strlen("micro")) == 0)
|
|
return PCAP_TSTAMP_PRECISION_MICRO;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const char *
|
|
tstamp_precision_to_string(int precision)
|
|
{
|
|
switch (precision) {
|
|
|
|
case PCAP_TSTAMP_PRECISION_MICRO:
|
|
return "micro";
|
|
|
|
case PCAP_TSTAMP_PRECISION_NANO:
|
|
return "nano";
|
|
|
|
default:
|
|
return "unknown";
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
register int cnt, op, i;
|
|
bpf_u_int32 localnet =0 , netmask = 0;
|
|
register char *cp, *infile, *cmdbuf, *device, *RFileName, *VFileName, *WFileName;
|
|
pcap_handler callback;
|
|
int type;
|
|
int dlt;
|
|
int new_dlt;
|
|
const char *dlt_name;
|
|
struct bpf_program fcode;
|
|
#ifndef WIN32
|
|
RETSIGTYPE (*oldhandler)(int);
|
|
#endif
|
|
struct print_info printinfo;
|
|
struct dump_info dumpinfo;
|
|
u_char *pcap_userdata;
|
|
char ebuf[PCAP_ERRBUF_SIZE];
|
|
char VFileLine[PATH_MAX + 1];
|
|
char *username = NULL;
|
|
char *chroot_dir = NULL;
|
|
char *ret = NULL;
|
|
char *end;
|
|
#ifdef HAVE_PCAP_FINDALLDEVS
|
|
pcap_if_t *devpointer;
|
|
int devnum;
|
|
#endif
|
|
int status;
|
|
FILE *VFile;
|
|
#ifdef HAVE_CAPSICUM
|
|
cap_rights_t rights;
|
|
#endif /* HAVE_CAPSICUM */
|
|
int cansandbox;
|
|
|
|
#ifdef WIN32
|
|
if(wsockinit() != 0) return 1;
|
|
#endif /* WIN32 */
|
|
|
|
jflag=-1; /* not set */
|
|
gndo->ndo_Oflag=1;
|
|
gndo->ndo_Rflag=1;
|
|
gndo->ndo_dlt=-1;
|
|
gndo->ndo_default_print=ndo_default_print;
|
|
gndo->ndo_printf=tcpdump_printf;
|
|
gndo->ndo_error=ndo_error;
|
|
gndo->ndo_warning=ndo_warning;
|
|
gndo->ndo_snaplen = DEFAULT_SNAPLEN;
|
|
|
|
cnt = -1;
|
|
device = NULL;
|
|
infile = NULL;
|
|
RFileName = NULL;
|
|
VFileName = NULL;
|
|
VFile = NULL;
|
|
WFileName = NULL;
|
|
dlt = -1;
|
|
if ((cp = strrchr(argv[0], '/')) != NULL)
|
|
program_name = cp + 1;
|
|
else
|
|
program_name = argv[0];
|
|
|
|
if (abort_on_misalignment(ebuf, sizeof(ebuf)) < 0)
|
|
error("%s", ebuf);
|
|
|
|
#ifdef USE_LIBSMI
|
|
smiInit("tcpdump");
|
|
#endif
|
|
|
|
while (
|
|
(op = getopt_long(argc, argv, "aAb" B_FLAG "c:C:d" D_FLAG "eE:fF:G:hHi:" I_FLAG j_FLAG J_FLAG "KlLm:M:nNOpq" Q_FLAG "r:Rs:StT:u" U_FLAG "vV:w:W:xXy:Yz:Z:#", longopts, NULL)) != -1)
|
|
switch (op) {
|
|
|
|
case 'a':
|
|
/* compatibility for old -a */
|
|
break;
|
|
|
|
case 'A':
|
|
++Aflag;
|
|
break;
|
|
|
|
case 'b':
|
|
++bflag;
|
|
break;
|
|
|
|
#if defined(HAVE_PCAP_CREATE) || defined(WIN32)
|
|
case 'B':
|
|
Bflag = atoi(optarg)*1024;
|
|
if (Bflag <= 0)
|
|
error("invalid packet buffer size %s", optarg);
|
|
break;
|
|
#endif /* defined(HAVE_PCAP_CREATE) || defined(WIN32) */
|
|
|
|
case 'c':
|
|
cnt = atoi(optarg);
|
|
if (cnt <= 0)
|
|
error("invalid packet count %s", optarg);
|
|
break;
|
|
|
|
case 'C':
|
|
Cflag = atoi(optarg) * 1000000;
|
|
if (Cflag < 0)
|
|
error("invalid file size %s", optarg);
|
|
break;
|
|
|
|
case 'd':
|
|
++dflag;
|
|
break;
|
|
|
|
case 'D':
|
|
Dflag++;
|
|
break;
|
|
|
|
case 'L':
|
|
Lflag++;
|
|
break;
|
|
|
|
case 'e':
|
|
++eflag;
|
|
break;
|
|
|
|
case 'E':
|
|
#ifndef HAVE_LIBCRYPTO
|
|
warning("crypto code not compiled in");
|
|
#endif
|
|
gndo->ndo_espsecret = optarg;
|
|
break;
|
|
|
|
case 'f':
|
|
++fflag;
|
|
break;
|
|
|
|
case 'F':
|
|
infile = optarg;
|
|
break;
|
|
|
|
case 'G':
|
|
Gflag = atoi(optarg);
|
|
if (Gflag < 0)
|
|
error("invalid number of seconds %s", optarg);
|
|
|
|
/* We will create one file initially. */
|
|
Gflag_count = 0;
|
|
|
|
/* Grab the current time for rotation use. */
|
|
if ((Gflag_time = time(NULL)) == (time_t)-1) {
|
|
error("main: can't get current time: %s",
|
|
pcap_strerror(errno));
|
|
}
|
|
break;
|
|
|
|
case 'h':
|
|
print_usage();
|
|
exit(0);
|
|
break;
|
|
|
|
case 'H':
|
|
++Hflag;
|
|
break;
|
|
|
|
case 'i':
|
|
if (optarg[0] == '0' && optarg[1] == 0)
|
|
error("Invalid adapter index");
|
|
|
|
#ifdef HAVE_PCAP_FINDALLDEVS
|
|
/*
|
|
* If the argument is a number, treat it as
|
|
* an index into the list of adapters, as
|
|
* printed by "tcpdump -D".
|
|
*
|
|
* This should be OK on UNIX systems, as interfaces
|
|
* shouldn't have names that begin with digits.
|
|
* It can be useful on Windows, where more than
|
|
* one interface can have the same name.
|
|
*/
|
|
devnum = strtol(optarg, &end, 10);
|
|
if (optarg != end && *end == '\0') {
|
|
if (devnum < 0)
|
|
error("Invalid adapter index");
|
|
|
|
if (pcap_findalldevs(&devpointer, ebuf) < 0)
|
|
error("%s", ebuf);
|
|
else {
|
|
/*
|
|
* Look for the devnum-th entry
|
|
* in the list of devices
|
|
* (1-based).
|
|
*/
|
|
for (i = 0;
|
|
i < devnum-1 && devpointer != NULL;
|
|
i++, devpointer = devpointer->next)
|
|
;
|
|
if (devpointer == NULL)
|
|
error("Invalid adapter index");
|
|
}
|
|
device = devpointer->name;
|
|
break;
|
|
}
|
|
#endif /* HAVE_PCAP_FINDALLDEVS */
|
|
device = optarg;
|
|
break;
|
|
|
|
#ifdef HAVE_PCAP_CREATE
|
|
case 'I':
|
|
++Iflag;
|
|
break;
|
|
#endif /* HAVE_PCAP_CREATE */
|
|
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
|
|
case 'j':
|
|
jflag = pcap_tstamp_type_name_to_val(optarg);
|
|
if (jflag < 0)
|
|
error("invalid time stamp type %s", optarg);
|
|
break;
|
|
|
|
case 'J':
|
|
Jflag++;
|
|
break;
|
|
#endif
|
|
|
|
case 'l':
|
|
#ifdef WIN32
|
|
/*
|
|
* _IOLBF is the same as _IOFBF in Microsoft's C
|
|
* libraries; the only alternative they offer
|
|
* is _IONBF.
|
|
*
|
|
* XXX - this should really be checking for MSVC++,
|
|
* not WIN32, if, for example, MinGW has its own
|
|
* C library that is more UNIX-compatible.
|
|
*/
|
|
setvbuf(stdout, NULL, _IONBF, 0);
|
|
#else /* WIN32 */
|
|
#ifdef HAVE_SETLINEBUF
|
|
setlinebuf(stdout);
|
|
#else
|
|
setvbuf(stdout, NULL, _IOLBF, 0);
|
|
#endif
|
|
#endif /* WIN32 */
|
|
break;
|
|
|
|
case 'K':
|
|
++Kflag;
|
|
break;
|
|
|
|
case 'm':
|
|
#ifdef USE_LIBSMI
|
|
if (smiLoadModule(optarg) == 0) {
|
|
error("could not load MIB module %s", optarg);
|
|
}
|
|
sflag = 1;
|
|
#else
|
|
(void)fprintf(stderr, "%s: ignoring option `-m %s' ",
|
|
program_name, optarg);
|
|
(void)fprintf(stderr, "(no libsmi support)\n");
|
|
#endif
|
|
break;
|
|
|
|
case 'M':
|
|
/* TCP-MD5 shared secret */
|
|
#ifndef HAVE_LIBCRYPTO
|
|
warning("crypto code not compiled in");
|
|
#endif
|
|
sigsecret = optarg;
|
|
break;
|
|
|
|
case 'n':
|
|
++nflag;
|
|
break;
|
|
|
|
case 'N':
|
|
++Nflag;
|
|
break;
|
|
|
|
case 'O':
|
|
Oflag = 0;
|
|
break;
|
|
|
|
case 'p':
|
|
++pflag;
|
|
break;
|
|
|
|
case 'q':
|
|
++qflag;
|
|
++suppress_default_print;
|
|
break;
|
|
|
|
#ifdef HAVE_PCAP_SETDIRECTION
|
|
case 'Q':
|
|
if (strcasecmp(optarg, "in") == 0)
|
|
Qflag = PCAP_D_IN;
|
|
else if (strcasecmp(optarg, "out") == 0)
|
|
Qflag = PCAP_D_OUT;
|
|
else if (strcasecmp(optarg, "inout") == 0)
|
|
Qflag = PCAP_D_INOUT;
|
|
else
|
|
error("unknown capture direction `%s'", optarg);
|
|
break;
|
|
#endif /* HAVE_PCAP_SETDIRECTION */
|
|
|
|
case 'r':
|
|
RFileName = optarg;
|
|
break;
|
|
|
|
case 'R':
|
|
Rflag = 0;
|
|
break;
|
|
|
|
case 's':
|
|
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 'S':
|
|
++Sflag;
|
|
break;
|
|
|
|
case 't':
|
|
++tflag;
|
|
break;
|
|
|
|
case 'T':
|
|
if (strcasecmp(optarg, "vat") == 0)
|
|
packettype = PT_VAT;
|
|
else if (strcasecmp(optarg, "wb") == 0)
|
|
packettype = PT_WB;
|
|
else if (strcasecmp(optarg, "rpc") == 0)
|
|
packettype = PT_RPC;
|
|
else if (strcasecmp(optarg, "rtp") == 0)
|
|
packettype = PT_RTP;
|
|
else if (strcasecmp(optarg, "rtcp") == 0)
|
|
packettype = PT_RTCP;
|
|
else if (strcasecmp(optarg, "snmp") == 0)
|
|
packettype = PT_SNMP;
|
|
else if (strcasecmp(optarg, "cnfp") == 0)
|
|
packettype = PT_CNFP;
|
|
else if (strcasecmp(optarg, "tftp") == 0)
|
|
packettype = PT_TFTP;
|
|
else if (strcasecmp(optarg, "aodv") == 0)
|
|
packettype = PT_AODV;
|
|
else if (strcasecmp(optarg, "carp") == 0)
|
|
packettype = PT_CARP;
|
|
else if (strcasecmp(optarg, "radius") == 0)
|
|
packettype = PT_RADIUS;
|
|
else if (strcasecmp(optarg, "zmtp1") == 0)
|
|
packettype = PT_ZMTP1;
|
|
else if (strcasecmp(optarg, "vxlan") == 0)
|
|
packettype = PT_VXLAN;
|
|
else if (strcasecmp(optarg, "pgm") == 0)
|
|
packettype = PT_PGM;
|
|
else if (strcasecmp(optarg, "pgm_zmtp1") == 0)
|
|
packettype = PT_PGM_ZMTP1;
|
|
else if (strcasecmp(optarg, "lmp") == 0)
|
|
packettype = PT_LMP;
|
|
else
|
|
error("unknown packet type `%s'", optarg);
|
|
break;
|
|
|
|
case 'u':
|
|
++uflag;
|
|
break;
|
|
|
|
#ifdef HAVE_PCAP_DUMP_FLUSH
|
|
case 'U':
|
|
++Uflag;
|
|
break;
|
|
#endif
|
|
|
|
case 'v':
|
|
++vflag;
|
|
break;
|
|
|
|
case 'V':
|
|
VFileName = optarg;
|
|
break;
|
|
|
|
case 'w':
|
|
WFileName = optarg;
|
|
break;
|
|
|
|
case 'W':
|
|
Wflag = atoi(optarg);
|
|
if (Wflag < 0)
|
|
error("invalid number of output files %s", optarg);
|
|
WflagChars = getWflagChars(Wflag);
|
|
break;
|
|
|
|
case 'x':
|
|
++xflag;
|
|
++suppress_default_print;
|
|
break;
|
|
|
|
case 'X':
|
|
++Xflag;
|
|
++suppress_default_print;
|
|
break;
|
|
|
|
case 'y':
|
|
gndo->ndo_dltname = optarg;
|
|
gndo->ndo_dlt =
|
|
pcap_datalink_name_to_val(gndo->ndo_dltname);
|
|
if (gndo->ndo_dlt < 0)
|
|
error("invalid data link type %s", gndo->ndo_dltname);
|
|
break;
|
|
|
|
#if defined(HAVE_PCAP_DEBUG) || defined(HAVE_YYDEBUG)
|
|
case 'Y':
|
|
{
|
|
/* Undocumented flag */
|
|
#ifdef HAVE_PCAP_DEBUG
|
|
extern int pcap_debug;
|
|
pcap_debug = 1;
|
|
#else
|
|
extern int yydebug;
|
|
yydebug = 1;
|
|
#endif
|
|
}
|
|
break;
|
|
#endif
|
|
case 'z':
|
|
zflag = strdup(optarg);
|
|
break;
|
|
|
|
case 'Z':
|
|
username = strdup(optarg);
|
|
break;
|
|
|
|
case '#':
|
|
gndo->ndo_packet_number = 1;
|
|
break;
|
|
|
|
case OPTION_VERSION:
|
|
print_version();
|
|
exit(0);
|
|
break;
|
|
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
|
|
case OPTION_TSTAMP_PRECISION:
|
|
gndo->ndo_tstamp_precision = tstamp_precision_from_string(optarg);
|
|
if (gndo->ndo_tstamp_precision < 0)
|
|
error("unsupported time stamp precision");
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
print_usage();
|
|
exit(1);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
#ifdef HAVE_PCAP_FINDALLDEVS
|
|
if (Dflag)
|
|
show_devices_and_exit();
|
|
#endif
|
|
|
|
switch (tflag) {
|
|
|
|
case 0: /* Default */
|
|
case 4: /* Default + Date*/
|
|
thiszone = gmt2local(0);
|
|
break;
|
|
|
|
case 1: /* No time stamp */
|
|
case 2: /* Unix timeval style */
|
|
case 3: /* Microseconds since previous packet */
|
|
case 5: /* Microseconds since first packet */
|
|
break;
|
|
|
|
default: /* Not supported */
|
|
error("only -t, -tt, -ttt, -tttt and -ttttt are supported");
|
|
break;
|
|
}
|
|
|
|
if (fflag != 0 && (VFileName != NULL || RFileName != NULL))
|
|
error("-f can not be used with -V or -r");
|
|
|
|
if (VFileName != NULL && RFileName != NULL)
|
|
error("-V and -r are mutually exclusive.");
|
|
|
|
#ifdef WITH_CHROOT
|
|
/* if run as root, prepare for chrooting */
|
|
if (getuid() == 0 || geteuid() == 0) {
|
|
/* future extensibility for cmd-line arguments */
|
|
if (!chroot_dir)
|
|
chroot_dir = WITH_CHROOT;
|
|
}
|
|
#endif
|
|
|
|
#ifdef WITH_USER
|
|
/* if run as root, prepare for dropping root privileges */
|
|
if (getuid() == 0 || geteuid() == 0) {
|
|
/* Run with '-Z root' to restore old behaviour */
|
|
if (!username)
|
|
username = WITH_USER;
|
|
}
|
|
#endif
|
|
|
|
if (RFileName != NULL || VFileName != NULL) {
|
|
/*
|
|
* If RFileName is non-null, it's the pathname of a
|
|
* savefile to read. If VFileName is non-null, it's
|
|
* the pathname of a file containing a list of pathnames
|
|
* (one per line) of savefiles to read.
|
|
*
|
|
* In either case, we're reading a savefile, not doing
|
|
* a live capture.
|
|
*/
|
|
#ifndef WIN32
|
|
/*
|
|
* We don't need network access, so relinquish any set-UID
|
|
* or set-GID privileges we have (if any).
|
|
*
|
|
* We do *not* want set-UID privileges when opening a
|
|
* trace file, as that might let the user read other
|
|
* people's trace files (especially if we're set-UID
|
|
* root).
|
|
*/
|
|
if (setgid(getgid()) != 0 || setuid(getuid()) != 0 )
|
|
fprintf(stderr, "Warning: setgid/setuid failed !\n");
|
|
#endif /* WIN32 */
|
|
if (VFileName != NULL) {
|
|
if (VFileName[0] == '-' && VFileName[1] == '\0')
|
|
VFile = stdin;
|
|
else
|
|
VFile = fopen(VFileName, "r");
|
|
|
|
if (VFile == NULL)
|
|
error("Unable to open file: %s\n", strerror(errno));
|
|
|
|
ret = get_next_file(VFile, VFileLine);
|
|
if (!ret)
|
|
error("Nothing in %s\n", VFileName);
|
|
RFileName = VFileLine;
|
|
}
|
|
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
|
|
pd = pcap_open_offline_with_tstamp_precision(RFileName,
|
|
gndo->ndo_tstamp_precision, ebuf);
|
|
#else
|
|
pd = pcap_open_offline(RFileName, ebuf);
|
|
#endif
|
|
|
|
if (pd == NULL)
|
|
error("%s", ebuf);
|
|
#ifdef HAVE_CAPSICUM
|
|
cap_rights_init(&rights, CAP_READ);
|
|
if (cap_rights_limit(fileno(pcap_file(pd)), &rights) < 0 &&
|
|
errno != ENOSYS) {
|
|
error("unable to limit pcap descriptor");
|
|
}
|
|
#endif
|
|
dlt = pcap_datalink(pd);
|
|
dlt_name = pcap_datalink_val_to_name(dlt);
|
|
if (dlt_name == NULL) {
|
|
fprintf(stderr, "reading from file %s, link-type %u\n",
|
|
RFileName, dlt);
|
|
} else {
|
|
fprintf(stderr,
|
|
"reading from file %s, link-type %s (%s)\n",
|
|
RFileName, dlt_name,
|
|
pcap_datalink_val_to_description(dlt));
|
|
}
|
|
} else {
|
|
/*
|
|
* We're doing a live capture.
|
|
*/
|
|
if (device == NULL) {
|
|
device = pcap_lookupdev(ebuf);
|
|
if (device == NULL)
|
|
error("%s", ebuf);
|
|
}
|
|
#ifdef WIN32
|
|
/*
|
|
* Print a message to the standard error on Windows.
|
|
* XXX - why do it here, with a different message?
|
|
*/
|
|
if(strlen(device) == 1) /* we assume that an ASCII string is always longer than 1 char */
|
|
{ /* a Unicode string has a \0 as second byte (so strlen() is 1) */
|
|
fprintf(stderr, "%s: listening on %ws\n", program_name, device);
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "%s: listening on %s\n", program_name, device);
|
|
}
|
|
|
|
fflush(stderr);
|
|
#endif /* WIN32 */
|
|
#ifdef HAVE_PCAP_CREATE
|
|
pd = pcap_create(device, ebuf);
|
|
if (pd == NULL)
|
|
error("%s", ebuf);
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
|
|
if (Jflag)
|
|
show_tstamp_types_and_exit(device, pd);
|
|
#endif
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
|
|
status = pcap_set_tstamp_precision(pd, gndo->ndo_tstamp_precision);
|
|
if (status != 0)
|
|
error("%s: Can't set %ssecond time stamp precision: %s",
|
|
device,
|
|
tstamp_precision_to_string(gndo->ndo_tstamp_precision),
|
|
pcap_statustostr(status));
|
|
#endif
|
|
|
|
/*
|
|
* Is this an interface that supports monitor mode?
|
|
*/
|
|
if (pcap_can_set_rfmon(pd) == 1)
|
|
supports_monitor_mode = 1;
|
|
else
|
|
supports_monitor_mode = 0;
|
|
status = pcap_set_snaplen(pd, snaplen);
|
|
if (status != 0)
|
|
error("%s: Can't set snapshot length: %s",
|
|
device, pcap_statustostr(status));
|
|
status = pcap_set_promisc(pd, !pflag);
|
|
if (status != 0)
|
|
error("%s: Can't set promiscuous mode: %s",
|
|
device, pcap_statustostr(status));
|
|
if (Iflag) {
|
|
status = pcap_set_rfmon(pd, 1);
|
|
if (status != 0)
|
|
error("%s: Can't set monitor mode: %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 (Bflag != 0) {
|
|
status = pcap_set_buffer_size(pd, Bflag);
|
|
if (status != 0)
|
|
error("%s: Can't set buffer size: %s",
|
|
device, pcap_statustostr(status));
|
|
}
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
|
|
if (jflag != -1) {
|
|
status = pcap_set_tstamp_type(pd, jflag);
|
|
if (status < 0)
|
|
error("%s: Can't set time stamp type: %s",
|
|
device, pcap_statustostr(status));
|
|
}
|
|
#endif
|
|
status = pcap_activate(pd);
|
|
if (status < 0) {
|
|
/*
|
|
* pcap_activate() failed.
|
|
*/
|
|
cp = pcap_geterr(pd);
|
|
if (status == PCAP_ERROR)
|
|
error("%s", cp);
|
|
else if ((status == PCAP_ERROR_NO_SUCH_DEVICE ||
|
|
status == PCAP_ERROR_PERM_DENIED) &&
|
|
*cp != '\0')
|
|
error("%s: %s\n(%s)", device,
|
|
pcap_statustostr(status), cp);
|
|
#ifdef __FreeBSD__
|
|
else if (status == PCAP_ERROR_RFMON_NOTSUP &&
|
|
strncmp(device, "wlan", 4) == 0) {
|
|
char parent[8], newdev[8];
|
|
char sysctl[32];
|
|
size_t s = sizeof(parent);
|
|
|
|
snprintf(sysctl, sizeof(sysctl),
|
|
"net.wlan.%d.%%parent", atoi(device + 4));
|
|
sysctlbyname(sysctl, parent, &s, NULL, 0);
|
|
strlcpy(newdev, device, sizeof(newdev));
|
|
/* Suggest a new wlan device. */
|
|
newdev[strlen(newdev)-1]++;
|
|
error("%s is not a monitor mode VAP\n"
|
|
"To create a new monitor mode VAP use:\n"
|
|
" ifconfig %s create wlandev %s wlanmode "
|
|
"monitor\nand use %s as the tcpdump "
|
|
"interface", device, newdev, parent,
|
|
newdev);
|
|
}
|
|
#endif
|
|
else
|
|
error("%s: %s", device,
|
|
pcap_statustostr(status));
|
|
} else if (status > 0) {
|
|
/*
|
|
* pcap_activate() succeeded, but it's warning us
|
|
* of a problem it had.
|
|
*/
|
|
cp = pcap_geterr(pd);
|
|
if (status == PCAP_WARNING)
|
|
warning("%s", cp);
|
|
else if (status == PCAP_WARNING_PROMISC_NOTSUP &&
|
|
*cp != '\0')
|
|
warning("%s: %s\n(%s)", device,
|
|
pcap_statustostr(status), cp);
|
|
else
|
|
warning("%s: %s", device,
|
|
pcap_statustostr(status));
|
|
}
|
|
#ifdef HAVE_PCAP_SETDIRECTION
|
|
if (Qflag != -1) {
|
|
status = pcap_setdirection(pd, Qflag);
|
|
if (status != 0)
|
|
error("%s: pcap_setdirection() failed: %s",
|
|
device, pcap_geterr(pd));
|
|
}
|
|
#endif /* HAVE_PCAP_SETDIRECTION */
|
|
#else
|
|
*ebuf = '\0';
|
|
pd = pcap_open_live(device, snaplen, !pflag, 1000, ebuf);
|
|
if (pd == NULL)
|
|
error("%s", ebuf);
|
|
else if (*ebuf)
|
|
warning("%s", ebuf);
|
|
#endif /* HAVE_PCAP_CREATE */
|
|
/*
|
|
* Let user own process after socket has been opened.
|
|
*/
|
|
#ifndef WIN32
|
|
if (setgid(getgid()) != 0 || setuid(getuid()) != 0)
|
|
fprintf(stderr, "Warning: setgid/setuid failed !\n");
|
|
#endif /* WIN32 */
|
|
#if !defined(HAVE_PCAP_CREATE) && defined(WIN32)
|
|
if(Bflag != 0)
|
|
if(pcap_setbuff(pd, Bflag)==-1){
|
|
error("%s", pcap_geterr(pd));
|
|
}
|
|
#endif /* !defined(HAVE_PCAP_CREATE) && defined(WIN32) */
|
|
if (Lflag)
|
|
show_dlts_and_exit(device, pd);
|
|
if (gndo->ndo_dlt >= 0) {
|
|
#ifdef HAVE_PCAP_SET_DATALINK
|
|
if (pcap_set_datalink(pd, gndo->ndo_dlt) < 0)
|
|
error("%s", pcap_geterr(pd));
|
|
#else
|
|
/*
|
|
* We don't actually support changing the
|
|
* data link type, so we only let them
|
|
* set it to what it already is.
|
|
*/
|
|
if (gndo->ndo_dlt != pcap_datalink(pd)) {
|
|
error("%s is not one of the DLTs supported by this device\n",
|
|
gndo->ndo_dltname);
|
|
}
|
|
#endif
|
|
(void)fprintf(stderr, "%s: data link type %s\n",
|
|
program_name, gndo->ndo_dltname);
|
|
(void)fflush(stderr);
|
|
}
|
|
i = pcap_snapshot(pd);
|
|
if (snaplen < i) {
|
|
warning("snaplen raised from %d to %d", snaplen, i);
|
|
snaplen = i;
|
|
}
|
|
if(fflag != 0) {
|
|
if (pcap_lookupnet(device, &localnet, &netmask, ebuf) < 0) {
|
|
warning("foreign (-f) flag used but: %s", ebuf);
|
|
}
|
|
}
|
|
|
|
}
|
|
if (infile)
|
|
cmdbuf = read_infile(infile);
|
|
else
|
|
cmdbuf = copy_argv(&argv[optind]);
|
|
|
|
if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
|
|
error("%s", pcap_geterr(pd));
|
|
if (dflag) {
|
|
bpf_dump(&fcode, dflag);
|
|
pcap_close(pd);
|
|
free(cmdbuf);
|
|
exit(0);
|
|
}
|
|
|
|
#ifdef HAVE_CAPSICUM
|
|
if (!nflag)
|
|
capdns = capdns_setup();
|
|
#endif /* HAVE_CAPSICUM */
|
|
|
|
init_addrtoname(gndo, localnet, netmask);
|
|
init_checksum();
|
|
|
|
#ifndef WIN32
|
|
(void)setsignal(SIGPIPE, cleanup);
|
|
(void)setsignal(SIGTERM, cleanup);
|
|
(void)setsignal(SIGINT, cleanup);
|
|
#endif /* WIN32 */
|
|
#if defined(HAVE_FORK) || defined(HAVE_VFORK)
|
|
(void)setsignal(SIGCHLD, child_cleanup);
|
|
#endif
|
|
/* Cooperate with nohup(1) */
|
|
#ifndef WIN32
|
|
if ((oldhandler = setsignal(SIGHUP, cleanup)) != SIG_DFL)
|
|
(void)setsignal(SIGHUP, oldhandler);
|
|
#endif /* WIN32 */
|
|
|
|
#ifndef WIN32
|
|
/*
|
|
* If a user name was specified with "-Z", attempt to switch to
|
|
* that user's UID. This would probably be used with sudo,
|
|
* to allow tcpdump to be run in a special restricted
|
|
* account (if you just want to allow users to open capture
|
|
* devices, and can't just give users that permission,
|
|
* you'd make tcpdump set-UID or set-GID).
|
|
*
|
|
* Tcpdump doesn't necessarily write only to one savefile;
|
|
* the general only way to allow a -Z instance to write to
|
|
* savefiles as the user under whose UID it's run, rather
|
|
* than as the user specified with -Z, would thus be to switch
|
|
* to the original user ID before opening a capture file and
|
|
* then switch back to the -Z user ID after opening the savefile.
|
|
* Switching to the -Z user ID only after opening the first
|
|
* savefile doesn't handle the general case.
|
|
*/
|
|
|
|
#ifdef HAVE_CAP_NG_H
|
|
/* We are running as root and we will be writing to savefile */
|
|
if ((getuid() == 0 || geteuid() == 0) && WFileName) {
|
|
if (username) {
|
|
/* Drop all capabilities from effective set */
|
|
capng_clear(CAPNG_EFFECTIVE);
|
|
/* Add capabilities we will need*/
|
|
capng_update(CAPNG_ADD, CAPNG_PERMITTED, CAP_SETUID);
|
|
capng_update(CAPNG_ADD, CAPNG_PERMITTED, CAP_SETGID);
|
|
capng_update(CAPNG_ADD, CAPNG_PERMITTED, CAP_DAC_OVERRIDE);
|
|
|
|
capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, CAP_SETUID);
|
|
capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, CAP_SETGID);
|
|
capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
|
|
|
|
capng_apply(CAPNG_SELECT_BOTH);
|
|
}
|
|
}
|
|
#endif /* HAVE_CAP_NG_H */
|
|
|
|
if (getuid() == 0 || geteuid() == 0) {
|
|
if (username || chroot_dir)
|
|
droproot(username, chroot_dir);
|
|
|
|
}
|
|
#endif /* WIN32 */
|
|
|
|
if (pcap_setfilter(pd, &fcode) < 0)
|
|
error("%s", pcap_geterr(pd));
|
|
#ifdef HAVE_CAPSICUM
|
|
if (RFileName == NULL && VFileName == NULL) {
|
|
static const unsigned long cmds[] = { BIOCGSTATS };
|
|
|
|
cap_rights_init(&rights, CAP_IOCTL, CAP_READ);
|
|
if (cap_rights_limit(pcap_fileno(pd), &rights) < 0 &&
|
|
errno != ENOSYS) {
|
|
error("unable to limit pcap descriptor");
|
|
}
|
|
if (cap_ioctls_limit(pcap_fileno(pd), cmds,
|
|
sizeof(cmds) / sizeof(cmds[0])) < 0 && errno != ENOSYS) {
|
|
error("unable to limit ioctls on pcap descriptor");
|
|
}
|
|
}
|
|
#endif
|
|
if (WFileName) {
|
|
pcap_dumper_t *p;
|
|
/* Do not exceed the default PATH_MAX for files. */
|
|
dumpinfo.CurrentFileName = (char *)malloc(PATH_MAX + 1);
|
|
|
|
if (dumpinfo.CurrentFileName == NULL)
|
|
error("malloc of dumpinfo.CurrentFileName");
|
|
|
|
/* We do not need numbering for dumpfiles if Cflag isn't set. */
|
|
if (Cflag != 0)
|
|
MakeFilename(dumpinfo.CurrentFileName, WFileName, 0, WflagChars);
|
|
else
|
|
MakeFilename(dumpinfo.CurrentFileName, WFileName, 0, 0);
|
|
|
|
p = pcap_dump_open(pd, dumpinfo.CurrentFileName);
|
|
#ifdef HAVE_CAP_NG_H
|
|
/* Give up capabilities, clear Effective set */
|
|
capng_clear(CAPNG_EFFECTIVE);
|
|
#endif
|
|
if (p == NULL)
|
|
error("%s", pcap_geterr(pd));
|
|
#ifdef HAVE_CAPSICUM
|
|
cap_rights_init(&rights, CAP_SEEK, CAP_WRITE);
|
|
if (cap_rights_limit(fileno(pcap_dump_file(p)), &rights) < 0 &&
|
|
errno != ENOSYS) {
|
|
error("unable to limit dump descriptor");
|
|
}
|
|
#endif
|
|
if (Cflag != 0 || Gflag != 0) {
|
|
#ifdef HAVE_CAPSICUM
|
|
dumpinfo.WFileName = strdup(basename(WFileName));
|
|
dumpinfo.dirfd = open(dirname(WFileName),
|
|
O_DIRECTORY | O_RDONLY);
|
|
if (dumpinfo.dirfd < 0) {
|
|
error("unable to open directory %s",
|
|
dirname(WFileName));
|
|
}
|
|
cap_rights_init(&rights, CAP_CREATE, CAP_FCNTL,
|
|
CAP_FTRUNCATE, CAP_LOOKUP, CAP_SEEK, CAP_WRITE);
|
|
if (cap_rights_limit(dumpinfo.dirfd, &rights) < 0 &&
|
|
errno != ENOSYS) {
|
|
error("unable to limit directory rights");
|
|
}
|
|
#else /* !HAVE_CAPSICUM */
|
|
dumpinfo.WFileName = WFileName;
|
|
#endif
|
|
callback = dump_packet_and_trunc;
|
|
dumpinfo.pd = pd;
|
|
dumpinfo.p = p;
|
|
pcap_userdata = (u_char *)&dumpinfo;
|
|
} else {
|
|
callback = dump_packet;
|
|
pcap_userdata = (u_char *)p;
|
|
}
|
|
#ifdef HAVE_PCAP_DUMP_FLUSH
|
|
if (Uflag)
|
|
pcap_dump_flush(p);
|
|
#endif
|
|
} else {
|
|
type = pcap_datalink(pd);
|
|
printinfo = get_print_info(type);
|
|
callback = print_packet;
|
|
pcap_userdata = (u_char *)&printinfo;
|
|
}
|
|
|
|
#ifdef SIGNAL_REQ_INFO
|
|
/*
|
|
* We can't get statistics when reading from a file rather
|
|
* than capturing from a device.
|
|
*/
|
|
if (RFileName == NULL)
|
|
(void)setsignal(SIGNAL_REQ_INFO, requestinfo);
|
|
#endif
|
|
|
|
if (vflag > 0 && WFileName) {
|
|
/*
|
|
* When capturing to a file, "-v" means tcpdump should,
|
|
* every 10 secodns, "v"erbosely report the number of
|
|
* packets captured.
|
|
*/
|
|
#ifdef USE_WIN32_MM_TIMER
|
|
/* call verbose_stats_dump() each 1000 +/-100msec */
|
|
timer_id = timeSetEvent(1000, 100, verbose_stats_dump, 0, TIME_PERIODIC);
|
|
setvbuf(stderr, NULL, _IONBF, 0);
|
|
#elif defined(HAVE_ALARM)
|
|
(void)setsignal(SIGALRM, verbose_stats_dump);
|
|
alarm(1);
|
|
#endif
|
|
}
|
|
|
|
#ifndef WIN32
|
|
if (RFileName == NULL) {
|
|
/*
|
|
* Live capture (if -V was specified, we set RFileName
|
|
* to a file from the -V file). Print a message to
|
|
* the standard error on UN*X.
|
|
*/
|
|
if (!vflag && !WFileName) {
|
|
(void)fprintf(stderr,
|
|
"%s: verbose output suppressed, use -v or -vv for full protocol decode\n",
|
|
program_name);
|
|
} else
|
|
(void)fprintf(stderr, "%s: ", program_name);
|
|
dlt = pcap_datalink(pd);
|
|
dlt_name = pcap_datalink_val_to_name(dlt);
|
|
if (dlt_name == NULL) {
|
|
(void)fprintf(stderr, "listening on %s, link-type %u, capture size %u bytes\n",
|
|
device, dlt, snaplen);
|
|
} else {
|
|
(void)fprintf(stderr, "listening on %s, link-type %s (%s), capture size %u bytes\n",
|
|
device, dlt_name,
|
|
pcap_datalink_val_to_description(dlt), snaplen);
|
|
}
|
|
(void)fflush(stderr);
|
|
}
|
|
#endif /* WIN32 */
|
|
|
|
#ifdef __FreeBSD__
|
|
cansandbox = (VFileName == NULL && zflag == NULL);
|
|
#ifdef HAVE_CAPSICUM
|
|
cansandbox = (cansandbox && (nflag || capdns != NULL));
|
|
#else
|
|
cansandbox = (cansandbox && nflag);
|
|
#endif
|
|
if (cansandbox && cap_enter() < 0 && errno != ENOSYS)
|
|
error("unable to enter the capability mode");
|
|
if (cap_sandboxed())
|
|
fprintf(stderr, "capability mode sandbox enabled\n");
|
|
#endif /* __FreeBSD__ */
|
|
|
|
do {
|
|
status = pcap_loop(pd, cnt, callback, pcap_userdata);
|
|
if (WFileName == NULL) {
|
|
/*
|
|
* We're printing packets. Flush the printed output,
|
|
* so it doesn't get intermingled with error output.
|
|
*/
|
|
if (status == -2) {
|
|
/*
|
|
* We got interrupted, so perhaps we didn't
|
|
* manage to finish a line we were printing.
|
|
* Print an extra newline, just in case.
|
|
*/
|
|
putchar('\n');
|
|
}
|
|
(void)fflush(stdout);
|
|
}
|
|
if (status == -2) {
|
|
/*
|
|
* We got interrupted. If we are reading multiple
|
|
* files (via -V) set these so that we stop.
|
|
*/
|
|
VFileName = NULL;
|
|
ret = NULL;
|
|
}
|
|
if (status == -1) {
|
|
/*
|
|
* Error. Report it.
|
|
*/
|
|
(void)fprintf(stderr, "%s: pcap_loop: %s\n",
|
|
program_name, pcap_geterr(pd));
|
|
}
|
|
if (RFileName == NULL) {
|
|
/*
|
|
* We're doing a live capture. Report the capture
|
|
* statistics.
|
|
*/
|
|
info(1);
|
|
}
|
|
pcap_close(pd);
|
|
if (VFileName != NULL) {
|
|
ret = get_next_file(VFile, VFileLine);
|
|
if (ret) {
|
|
RFileName = VFileLine;
|
|
pd = pcap_open_offline(RFileName, ebuf);
|
|
if (pd == NULL)
|
|
error("%s", ebuf);
|
|
#ifdef HAVE_CAPSICUM
|
|
cap_rights_init(&rights, CAP_READ);
|
|
if (cap_rights_limit(fileno(pcap_file(pd)),
|
|
&rights) < 0 && errno != ENOSYS) {
|
|
error("unable to limit pcap descriptor");
|
|
}
|
|
#endif
|
|
new_dlt = pcap_datalink(pd);
|
|
if (WFileName && new_dlt != dlt)
|
|
error("%s: new dlt does not match original", RFileName);
|
|
printinfo = get_print_info(new_dlt);
|
|
dlt_name = pcap_datalink_val_to_name(new_dlt);
|
|
if (dlt_name == NULL) {
|
|
fprintf(stderr, "reading from file %s, link-type %u\n",
|
|
RFileName, new_dlt);
|
|
} else {
|
|
fprintf(stderr,
|
|
"reading from file %s, link-type %s (%s)\n",
|
|
RFileName, dlt_name,
|
|
pcap_datalink_val_to_description(new_dlt));
|
|
}
|
|
if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
|
|
error("%s", pcap_geterr(pd));
|
|
if (pcap_setfilter(pd, &fcode) < 0)
|
|
error("%s", pcap_geterr(pd));
|
|
}
|
|
}
|
|
}
|
|
while (ret != NULL);
|
|
|
|
free(cmdbuf);
|
|
exit(status == -1 ? 1 : 0);
|
|
}
|
|
|
|
/* make a clean exit on interrupts */
|
|
static RETSIGTYPE
|
|
cleanup(int signo _U_)
|
|
{
|
|
#ifdef USE_WIN32_MM_TIMER
|
|
if (timer_id)
|
|
timeKillEvent(timer_id);
|
|
timer_id = 0;
|
|
#elif defined(HAVE_ALARM)
|
|
alarm(0);
|
|
#endif
|
|
|
|
#ifdef HAVE_PCAP_BREAKLOOP
|
|
/*
|
|
* We have "pcap_breakloop()"; use it, so that we do as little
|
|
* as possible in the signal handler (it's probably not safe
|
|
* to do anything with standard I/O streams in a signal handler -
|
|
* the ANSI C standard doesn't say it is).
|
|
*/
|
|
pcap_breakloop(pd);
|
|
#else
|
|
/*
|
|
* We don't have "pcap_breakloop()"; this isn't safe, but
|
|
* it's the best we can do. Print the summary if we're
|
|
* not reading from a savefile - i.e., if we're doing a
|
|
* live capture - and exit.
|
|
*/
|
|
if (pd != NULL && pcap_file(pd) == NULL) {
|
|
/*
|
|
* We got interrupted, so perhaps we didn't
|
|
* manage to finish a line we were printing.
|
|
* Print an extra newline, just in case.
|
|
*/
|
|
putchar('\n');
|
|
(void)fflush(stdout);
|
|
info(1);
|
|
}
|
|
exit(0);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
On windows, we do not use a fork, so we do not care less about
|
|
waiting a child processes to die
|
|
*/
|
|
#if defined(HAVE_FORK) || defined(HAVE_VFORK)
|
|
static RETSIGTYPE
|
|
child_cleanup(int signo _U_)
|
|
{
|
|
wait(NULL);
|
|
}
|
|
#endif /* HAVE_FORK && HAVE_VFORK */
|
|
|
|
static void
|
|
info(register int verbose)
|
|
{
|
|
struct pcap_stat stat;
|
|
|
|
/*
|
|
* Older versions of libpcap didn't set ps_ifdrop on some
|
|
* platforms; initialize it to 0 to handle that.
|
|
*/
|
|
stat.ps_ifdrop = 0;
|
|
if (pcap_stats(pd, &stat) < 0) {
|
|
(void)fprintf(stderr, "pcap_stats: %s\n", pcap_geterr(pd));
|
|
infoprint = 0;
|
|
return;
|
|
}
|
|
|
|
if (!verbose)
|
|
fprintf(stderr, "%s: ", program_name);
|
|
|
|
(void)fprintf(stderr, "%u packet%s captured", packets_captured,
|
|
PLURAL_SUFFIX(packets_captured));
|
|
if (!verbose)
|
|
fputs(", ", stderr);
|
|
else
|
|
putc('\n', stderr);
|
|
(void)fprintf(stderr, "%u packet%s received by filter", stat.ps_recv,
|
|
PLURAL_SUFFIX(stat.ps_recv));
|
|
if (!verbose)
|
|
fputs(", ", stderr);
|
|
else
|
|
putc('\n', stderr);
|
|
(void)fprintf(stderr, "%u packet%s dropped by kernel", stat.ps_drop,
|
|
PLURAL_SUFFIX(stat.ps_drop));
|
|
if (stat.ps_ifdrop != 0) {
|
|
if (!verbose)
|
|
fputs(", ", stderr);
|
|
else
|
|
putc('\n', stderr);
|
|
(void)fprintf(stderr, "%u packet%s dropped by interface\n",
|
|
stat.ps_ifdrop, PLURAL_SUFFIX(stat.ps_ifdrop));
|
|
} else
|
|
putc('\n', stderr);
|
|
infoprint = 0;
|
|
}
|
|
|
|
#if defined(HAVE_FORK) || defined(HAVE_VFORK)
|
|
static void
|
|
compress_savefile(const char *filename)
|
|
{
|
|
# ifdef HAVE_FORK
|
|
if (fork())
|
|
# else
|
|
if (vfork())
|
|
# endif
|
|
return;
|
|
/*
|
|
* Set to lowest priority so that this doesn't disturb the capture
|
|
*/
|
|
#ifdef NZERO
|
|
setpriority(PRIO_PROCESS, 0, NZERO - 1);
|
|
#else
|
|
setpriority(PRIO_PROCESS, 0, 19);
|
|
#endif
|
|
if (execlp(zflag, zflag, filename, (char *)NULL) == -1)
|
|
fprintf(stderr,
|
|
"compress_savefile:execlp(%s, %s): %s\n",
|
|
zflag,
|
|
filename,
|
|
strerror(errno));
|
|
# ifdef HAVE_FORK
|
|
exit(1);
|
|
# else
|
|
_exit(1);
|
|
# endif
|
|
}
|
|
#else /* HAVE_FORK && HAVE_VFORK */
|
|
static void
|
|
compress_savefile(const char *filename)
|
|
{
|
|
fprintf(stderr,
|
|
"compress_savefile failed. Functionality not implemented under your system\n");
|
|
}
|
|
#endif /* HAVE_FORK && HAVE_VFORK */
|
|
|
|
static void
|
|
dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
|
|
{
|
|
struct dump_info *dump_info;
|
|
#ifdef HAVE_CAPSICUM
|
|
cap_rights_t rights;
|
|
#endif
|
|
|
|
++packets_captured;
|
|
|
|
++infodelay;
|
|
|
|
dump_info = (struct dump_info *)user;
|
|
|
|
/*
|
|
* XXX - this won't force the file to rotate on the specified time
|
|
* boundary, but it will rotate on the first packet received after the
|
|
* specified Gflag number of seconds. Note: if a Gflag time boundary
|
|
* and a Cflag size boundary coincide, the time rotation will occur
|
|
* first thereby cancelling the Cflag boundary (since the file should
|
|
* be 0).
|
|
*/
|
|
if (Gflag != 0) {
|
|
/* Check if it is time to rotate */
|
|
time_t t;
|
|
|
|
/* Get the current time */
|
|
if ((t = time(NULL)) == (time_t)-1) {
|
|
error("dump_and_trunc_packet: can't get current_time: %s",
|
|
pcap_strerror(errno));
|
|
}
|
|
|
|
|
|
/* If the time is greater than the specified window, rotate */
|
|
if (t - Gflag_time >= Gflag) {
|
|
#ifdef HAVE_CAPSICUM
|
|
FILE *fp;
|
|
int fd;
|
|
#endif
|
|
|
|
/* Update the Gflag_time */
|
|
Gflag_time = t;
|
|
/* Update Gflag_count */
|
|
Gflag_count++;
|
|
/*
|
|
* Close the current file and open a new one.
|
|
*/
|
|
pcap_dump_close(dump_info->p);
|
|
|
|
/*
|
|
* Compress the file we just closed, if the user asked for it
|
|
*/
|
|
if (zflag != NULL)
|
|
compress_savefile(dump_info->CurrentFileName);
|
|
|
|
/*
|
|
* Check to see if we've exceeded the Wflag (when
|
|
* not using Cflag).
|
|
*/
|
|
if (Cflag == 0 && Wflag > 0 && Gflag_count >= Wflag) {
|
|
(void)fprintf(stderr, "Maximum file limit reached: %d\n",
|
|
Wflag);
|
|
exit(0);
|
|
/* NOTREACHED */
|
|
}
|
|
if (dump_info->CurrentFileName != NULL)
|
|
free(dump_info->CurrentFileName);
|
|
/* Allocate space for max filename + \0. */
|
|
dump_info->CurrentFileName = (char *)malloc(PATH_MAX + 1);
|
|
if (dump_info->CurrentFileName == NULL)
|
|
error("dump_packet_and_trunc: malloc");
|
|
/*
|
|
* Gflag was set otherwise we wouldn't be here. Reset the count
|
|
* so multiple files would end with 1,2,3 in the filename.
|
|
* The counting is handled with the -C flow after this.
|
|
*/
|
|
Cflag_count = 0;
|
|
|
|
/*
|
|
* This is always the first file in the Cflag
|
|
* rotation: e.g. 0
|
|
* We also don't need numbering if Cflag is not set.
|
|
*/
|
|
if (Cflag != 0)
|
|
MakeFilename(dump_info->CurrentFileName, dump_info->WFileName, 0,
|
|
WflagChars);
|
|
else
|
|
MakeFilename(dump_info->CurrentFileName, dump_info->WFileName, 0, 0);
|
|
|
|
#ifdef HAVE_CAP_NG_H
|
|
capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
|
|
capng_apply(CAPNG_EFFECTIVE);
|
|
#endif /* HAVE_CAP_NG_H */
|
|
#ifdef HAVE_CAPSICUM
|
|
fd = openat(dump_info->dirfd,
|
|
dump_info->CurrentFileName,
|
|
O_CREAT | O_WRONLY | O_TRUNC, 0644);
|
|
if (fd < 0) {
|
|
error("unable to open file %s",
|
|
dump_info->CurrentFileName);
|
|
}
|
|
fp = fdopen(fd, "w");
|
|
if (fp == NULL) {
|
|
error("unable to fdopen file %s",
|
|
dump_info->CurrentFileName);
|
|
}
|
|
dump_info->p = pcap_dump_fopen(dump_info->pd, fp);
|
|
#else /* !HAVE_CAPSICUM */
|
|
dump_info->p = pcap_dump_open(dump_info->pd, dump_info->CurrentFileName);
|
|
#endif
|
|
#ifdef HAVE_CAP_NG_H
|
|
capng_update(CAPNG_DROP, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
|
|
capng_apply(CAPNG_EFFECTIVE);
|
|
#endif /* HAVE_CAP_NG_H */
|
|
if (dump_info->p == NULL)
|
|
error("%s", pcap_geterr(pd));
|
|
#ifdef HAVE_CAPSICUM
|
|
cap_rights_init(&rights, CAP_SEEK, CAP_WRITE);
|
|
if (cap_rights_limit(fileno(pcap_dump_file(dump_info->p)),
|
|
&rights) < 0 && errno != ENOSYS) {
|
|
error("unable to limit dump descriptor");
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* XXX - this won't prevent capture files from getting
|
|
* larger than Cflag - the last packet written to the
|
|
* file could put it over Cflag.
|
|
*/
|
|
if (Cflag != 0 && pcap_dump_ftell(dump_info->p) > Cflag) {
|
|
#ifdef HAVE_CAPSICUM
|
|
FILE *fp;
|
|
int fd;
|
|
#endif
|
|
|
|
/*
|
|
* Close the current file and open a new one.
|
|
*/
|
|
pcap_dump_close(dump_info->p);
|
|
|
|
/*
|
|
* Compress the file we just closed, if the user asked for it
|
|
*/
|
|
if (zflag != NULL)
|
|
compress_savefile(dump_info->CurrentFileName);
|
|
|
|
Cflag_count++;
|
|
if (Wflag > 0) {
|
|
if (Cflag_count >= Wflag)
|
|
Cflag_count = 0;
|
|
}
|
|
if (dump_info->CurrentFileName != NULL)
|
|
free(dump_info->CurrentFileName);
|
|
dump_info->CurrentFileName = (char *)malloc(PATH_MAX + 1);
|
|
if (dump_info->CurrentFileName == NULL)
|
|
error("dump_packet_and_trunc: malloc");
|
|
MakeFilename(dump_info->CurrentFileName, dump_info->WFileName, Cflag_count, WflagChars);
|
|
#ifdef HAVE_CAPSICUM
|
|
fd = openat(dump_info->dirfd, dump_info->CurrentFileName,
|
|
O_CREAT | O_WRONLY | O_TRUNC, 0644);
|
|
if (fd < 0) {
|
|
error("unable to open file %s",
|
|
dump_info->CurrentFileName);
|
|
}
|
|
fp = fdopen(fd, "w");
|
|
if (fp == NULL) {
|
|
error("unable to fdopen file %s",
|
|
dump_info->CurrentFileName);
|
|
}
|
|
dump_info->p = pcap_dump_fopen(dump_info->pd, fp);
|
|
#else /* !HAVE_CAPSICUM */
|
|
dump_info->p = pcap_dump_open(dump_info->pd, dump_info->CurrentFileName);
|
|
#endif
|
|
if (dump_info->p == NULL)
|
|
error("%s", pcap_geterr(pd));
|
|
#ifdef HAVE_CAPSICUM
|
|
cap_rights_init(&rights, CAP_SEEK, CAP_WRITE);
|
|
if (cap_rights_limit(fileno(pcap_dump_file(dump_info->p)),
|
|
&rights) < 0 && errno != ENOSYS) {
|
|
error("unable to limit dump descriptor");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
pcap_dump((u_char *)dump_info->p, h, sp);
|
|
#ifdef HAVE_PCAP_DUMP_FLUSH
|
|
if (Uflag)
|
|
pcap_dump_flush(dump_info->p);
|
|
#endif
|
|
|
|
--infodelay;
|
|
if (infoprint)
|
|
info(0);
|
|
}
|
|
|
|
static void
|
|
dump_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
|
|
{
|
|
++packets_captured;
|
|
|
|
++infodelay;
|
|
|
|
pcap_dump(user, h, sp);
|
|
#ifdef HAVE_PCAP_DUMP_FLUSH
|
|
if (Uflag)
|
|
pcap_dump_flush((pcap_dumper_t *)user);
|
|
#endif
|
|
|
|
--infodelay;
|
|
if (infoprint)
|
|
info(0);
|
|
}
|
|
|
|
static void
|
|
print_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
|
|
{
|
|
struct print_info *print_info;
|
|
u_int hdrlen;
|
|
netdissect_options *ndo;
|
|
|
|
++packets_captured;
|
|
|
|
++infodelay;
|
|
|
|
print_info = (struct print_info *)user;
|
|
ndo = print_info->ndo;
|
|
|
|
if(ndo->ndo_packet_number)
|
|
ND_PRINT((ndo, "%5u ", packets_captured));
|
|
|
|
ts_print(ndo, &h->ts);
|
|
|
|
/*
|
|
* Some printers want to check that they're not walking off the
|
|
* end of the packet.
|
|
* Rather than pass it all the way down, we set this global.
|
|
*/
|
|
ndo->ndo_snapend = sp + h->caplen;
|
|
|
|
if(print_info->ndo_type) {
|
|
hdrlen = (*print_info->p.ndo_printer)(print_info->ndo, h, sp);
|
|
} else {
|
|
hdrlen = (*print_info->p.printer)(h, sp);
|
|
}
|
|
|
|
if (ndo->ndo_Xflag) {
|
|
/*
|
|
* Print the raw packet data in hex and ASCII.
|
|
*/
|
|
if (ndo->ndo_Xflag > 1) {
|
|
/*
|
|
* Include the link-layer header.
|
|
*/
|
|
hex_and_ascii_print(ndo, "\n\t", sp, h->caplen);
|
|
} else {
|
|
/*
|
|
* Don't include the link-layer header - and if
|
|
* we have nothing past the link-layer header,
|
|
* print nothing.
|
|
*/
|
|
if (h->caplen > hdrlen)
|
|
hex_and_ascii_print(ndo, "\n\t", sp + hdrlen,
|
|
h->caplen - hdrlen);
|
|
}
|
|
} else if (ndo->ndo_xflag) {
|
|
/*
|
|
* Print the raw packet data in hex.
|
|
*/
|
|
if (ndo->ndo_xflag > 1) {
|
|
/*
|
|
* Include the link-layer header.
|
|
*/
|
|
hex_print(ndo, "\n\t", sp, h->caplen);
|
|
} else {
|
|
/*
|
|
* Don't include the link-layer header - and if
|
|
* we have nothing past the link-layer header,
|
|
* print nothing.
|
|
*/
|
|
if (h->caplen > hdrlen)
|
|
hex_print(ndo, "\n\t", sp + hdrlen,
|
|
h->caplen - hdrlen);
|
|
}
|
|
} else if (ndo->ndo_Aflag) {
|
|
/*
|
|
* Print the raw packet data in ASCII.
|
|
*/
|
|
if (ndo->ndo_Aflag > 1) {
|
|
/*
|
|
* Include the link-layer header.
|
|
*/
|
|
ascii_print(ndo, sp, h->caplen);
|
|
} else {
|
|
/*
|
|
* Don't include the link-layer header - and if
|
|
* we have nothing past the link-layer header,
|
|
* print nothing.
|
|
*/
|
|
if (h->caplen > hdrlen)
|
|
ascii_print(ndo, sp + hdrlen, h->caplen - hdrlen);
|
|
}
|
|
}
|
|
|
|
putchar('\n');
|
|
|
|
--infodelay;
|
|
if (infoprint)
|
|
info(0);
|
|
}
|
|
|
|
#ifdef WIN32
|
|
/*
|
|
* XXX - there should really be libpcap calls to get the version
|
|
* number as a string (the string would be generated from #defines
|
|
* at run time, so that it's not generated from string constants
|
|
* in the library, as, on many UNIX systems, those constants would
|
|
* be statically linked into the application executable image, and
|
|
* would thus reflect the version of libpcap on the system on
|
|
* which the application was *linked*, not the system on which it's
|
|
* *running*.
|
|
*
|
|
* That routine should be documented, unlike the "version[]"
|
|
* string, so that UNIX vendors providing their own libpcaps
|
|
* don't omit it (as a couple of vendors have...).
|
|
*
|
|
* Packet.dll should perhaps also export a routine to return the
|
|
* version number of the Packet.dll code, to supply the
|
|
* "Wpcap_version" information on Windows.
|
|
*/
|
|
char WDversion[]="current-git.tcpdump.org";
|
|
#if !defined(HAVE_GENERATED_VERSION)
|
|
char version[]="current-git.tcpdump.org";
|
|
#endif
|
|
char pcap_version[]="current-git.tcpdump.org";
|
|
char Wpcap_version[]="3.1";
|
|
#endif
|
|
|
|
/*
|
|
* By default, print the specified data out in hex and ASCII.
|
|
*/
|
|
static void
|
|
ndo_default_print(netdissect_options *ndo, const u_char *bp, u_int length)
|
|
{
|
|
hex_and_ascii_print(ndo, "\n\t", bp, length); /* pass on lf and identation string */
|
|
}
|
|
|
|
void
|
|
default_print(const u_char *bp, u_int length)
|
|
{
|
|
ndo_default_print(gndo, bp, length);
|
|
}
|
|
|
|
#ifdef SIGNAL_REQ_INFO
|
|
RETSIGTYPE requestinfo(int signo _U_)
|
|
{
|
|
if (infodelay)
|
|
++infoprint;
|
|
else
|
|
info(0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Called once each second in verbose mode while dumping to file
|
|
*/
|
|
#ifdef USE_WIN32_MM_TIMER
|
|
void CALLBACK verbose_stats_dump (UINT timer_id _U_, UINT msg _U_, DWORD_PTR arg _U_,
|
|
DWORD_PTR dw1 _U_, DWORD_PTR dw2 _U_)
|
|
{
|
|
struct pcap_stat stat;
|
|
|
|
if (infodelay == 0 && pcap_stats(pd, &stat) >= 0)
|
|
fprintf(stderr, "Got %u\r", packets_captured);
|
|
}
|
|
#elif defined(HAVE_ALARM)
|
|
static void verbose_stats_dump(int sig _U_)
|
|
{
|
|
struct pcap_stat stat;
|
|
|
|
if (infodelay == 0 && pcap_stats(pd, &stat) >= 0)
|
|
fprintf(stderr, "Got %u\r", packets_captured);
|
|
alarm(1);
|
|
}
|
|
#endif
|
|
|
|
USES_APPLE_DEPRECATED_API
|
|
static void
|
|
print_version(void)
|
|
{
|
|
extern char version[];
|
|
#ifndef HAVE_PCAP_LIB_VERSION
|
|
#if defined(WIN32) || defined(HAVE_PCAP_VERSION)
|
|
extern char pcap_version[];
|
|
#else /* defined(WIN32) || defined(HAVE_PCAP_VERSION) */
|
|
static char pcap_version[] = "unknown";
|
|
#endif /* defined(WIN32) || defined(HAVE_PCAP_VERSION) */
|
|
#endif /* HAVE_PCAP_LIB_VERSION */
|
|
|
|
#ifdef HAVE_PCAP_LIB_VERSION
|
|
#ifdef WIN32
|
|
(void)fprintf(stderr, "%s version %s, based on tcpdump version %s\n", program_name, WDversion, version);
|
|
#else /* WIN32 */
|
|
(void)fprintf(stderr, "%s version %s\n", program_name, version);
|
|
#endif /* WIN32 */
|
|
(void)fprintf(stderr, "%s\n",pcap_lib_version());
|
|
#else /* HAVE_PCAP_LIB_VERSION */
|
|
#ifdef WIN32
|
|
(void)fprintf(stderr, "%s version %s, based on tcpdump version %s\n", program_name, WDversion, version);
|
|
(void)fprintf(stderr, "WinPcap version %s, based on libpcap version %s\n",Wpcap_version, pcap_version);
|
|
#else /* WIN32 */
|
|
(void)fprintf(stderr, "%s version %s\n", program_name, version);
|
|
(void)fprintf(stderr, "libpcap version %s\n", pcap_version);
|
|
#endif /* WIN32 */
|
|
#endif /* HAVE_PCAP_LIB_VERSION */
|
|
|
|
#if defined(HAVE_LIBCRYPTO) && defined(SSLEAY_VERSION)
|
|
(void)fprintf (stderr, "%s\n", SSLeay_version(SSLEAY_VERSION));
|
|
#endif
|
|
|
|
#ifdef USE_LIBSMI
|
|
(void)fprintf (stderr, "SMI-library: %s\n", smi_version_string);
|
|
#endif
|
|
}
|
|
USES_APPLE_RST
|
|
|
|
static void
|
|
print_usage(void)
|
|
{
|
|
print_version();
|
|
(void)fprintf(stderr,
|
|
"Usage: %s [-aAbd" D_FLAG "efhH" I_FLAG J_FLAG "KlLnNOpqRStu" U_FLAG "vxX#]" B_FLAG_USAGE " [ -c count ]\n", program_name);
|
|
(void)fprintf(stderr,
|
|
"\t\t[ -C file_size ] [ -E algo:secret ] [ -F file ] [ -G seconds ]\n");
|
|
(void)fprintf(stderr,
|
|
"\t\t[ -i interface ]" j_FLAG_USAGE " [ -M secret ] [ --number ]\n");
|
|
#ifdef HAVE_PCAP_SETDIRECTION
|
|
(void)fprintf(stderr,
|
|
"\t\t[ -Q in|out|inout ]\n");
|
|
#endif
|
|
(void)fprintf(stderr,
|
|
"\t\t[ -r file ] [ -s snaplen ] ");
|
|
#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
|
|
(void)fprintf(stderr, "[ --time-stamp-precision precision ]\n");
|
|
(void)fprintf(stderr,
|
|
"\t\t");
|
|
#endif
|
|
(void)fprintf(stderr, "[ -T type ] [ --version ] [ -V file ]\n");
|
|
(void)fprintf(stderr,
|
|
"\t\t[ -w file ] [ -W filecount ] [ -y datalinktype ] [ -z command ]\n");
|
|
(void)fprintf(stderr,
|
|
"\t\t[ -Z user ] [ expression ]\n");
|
|
}
|
|
|
|
|
|
|
|
/* VARARGS */
|
|
static void
|
|
ndo_error(netdissect_options *ndo _U_, 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
|
|
ndo_warning(netdissect_options *ndo _U_, 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);
|
|
}
|
|
}
|
|
/*
|
|
* Local Variables:
|
|
* c-style: whitesmith
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|