*/
-#ifndef lint
-static const char copyright[] _U_ =
- "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
-The Regents of the University of California. All rights reserved.\n";
-#endif
-
/*
- * tcpdump - monitor tcp/ip traffic on an ethernet.
+ * tcpdump - dump traffic on a network
*
* First written in 1987 by Van Jacobson, Lawrence Berkeley Laboratory.
* Mercilessly hacked and occasionally improved since then via the
*/
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
+/*
+ * Some older versions of Mac OS X may ship pcap.h from libpcap 0.6 with a
+ * libpcap based on 0.8. That means it has pcap_findalldevs() but the
+ * header doesn't define pcap_if_t, meaning that we can't actually *use*
+ * pcap_findalldevs().
+ */
+#ifdef HAVE_PCAP_FINDALLDEVS
+#ifndef HAVE_PCAP_IF_T
+#undef HAVE_PCAP_FINDALLDEVS
+#endif
+#endif
-#ifdef WIN32
-#include "w32_fzs.h"
-extern int strcasecmp (const char *__s1, const char *__s2);
-extern int SIZE_BUF;
-#define off_t long
-#define uint UINT
-#endif /* WIN32 */
+#include "netdissect-stdinc.h"
-#ifdef HAVE_SMI_H
-#include <smi.h>
+/*
+ * This must appear after including netdissect-stdinc.h, so that _U_ is
+ * defined.
+ */
+#ifndef lint
+static const char copyright[] _U_ =
+ "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
+The Regents of the University of California. All rights reserved.\n";
+#endif
+
+#include <sys/stat.h>
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#ifdef HAVE_LIBCRYPTO
+#include <openssl/crypto.h>
#endif
#ifdef HAVE_GETOPT_LONG
#include <getopt.h>
#else
-#include "getopt_long.h"
+#include "missing/getopt_long.h"
+#endif
+/* Capsicum-specific code requires macros from <net/bpf.h>, which will fail
+ * to compile if <pcap.h> has already been included; including the headers
+ * in the opposite order works fine. For the most part anyway, because in
+ * FreeBSD <pcap/pcap.h> declares bpf_dump() instead of <net/bpf.h>. Thus
+ * interface.h takes care of it later to avoid a compiler warning.
+ */
+#ifdef HAVE_CAPSICUM
+#include <sys/capsicum.h>
+#include <sys/ioccom.h>
+#include <net/bpf.h>
+#include <libgen.h>
+#ifdef HAVE_CASPER
+#include <libcasper.h>
+#include <casper/cap_dns.h>
+#include <sys/nv.h>
+#endif /* HAVE_CASPER */
+#endif /* HAVE_CAPSICUM */
+#ifdef HAVE_PCAP_OPEN
+/*
+ * We found pcap_open() in the capture library, so we'll be using
+ * the remote capture APIs; define PCAP_REMOTE before we include pcap.h,
+ * so we get those APIs declared, and the types and #defines that they
+ * use defined.
+ *
+ * WinPcap's headers require that PCAP_REMOTE be defined in order to get
+ * remote-capture APIs declared and types and #defines that they use
+ * defined.
+ *
+ * (Versions of libpcap with those APIs, and thus Npcap, which is based on
+ * those versions of libpcap, don't require it.)
+ */
+#define HAVE_REMOTE
#endif
#include <pcap.h>
#include <signal.h>
#include <stdio.h>
+#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
-#ifndef WIN32
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <sys/time.h>
#include <sys/wait.h>
#include <sys/resource.h>
#include <pwd.h>
#include <grp.h>
-#include <errno.h>
-#endif /* WIN32 */
+#endif /* _WIN32 */
+
+/*
+ * Pathname separator.
+ * Use this in pathnames, but do *not* use it in URLs.
+ */
+#ifdef _WIN32
+#define PATH_SEPARATOR '\\'
+#else
+#define PATH_SEPARATOR '/'
+#endif
-/* capabilities convinience library */
+/* capabilities convenience library */
+/* If a code depends on HAVE_LIBCAP_NG, it depends also on HAVE_CAP_NG_H.
+ * If HAVE_CAP_NG_H is not defined, undefine HAVE_LIBCAP_NG.
+ * Thus, the later tests are done only on HAVE_LIBCAP_NG.
+ */
+#ifdef HAVE_LIBCAP_NG
#ifdef HAVE_CAP_NG_H
#include <cap-ng.h>
+#else
+#undef HAVE_LIBCAP_NG
#endif /* HAVE_CAP_NG_H */
+#endif /* HAVE_LIBCAP_NG */
+
+#ifdef __FreeBSD__
+#include <sys/sysctl.h>
+#endif /* __FreeBSD__ */
+#include "netdissect-stdinc.h"
#include "netdissect.h"
#include "interface.h"
#include "addrtoname.h"
#include "machdep.h"
-#include "setsignal.h"
-#include "gmt2local.h"
#include "pcap-missing.h"
+#include "ascii_strcasecmp.h"
+
+#include "print.h"
+
+#include "diag-control.h"
+
+#include "fptype.h"
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
-#ifdef SIGINFO
+#if defined(SIGINFO)
#define SIGNAL_REQ_INFO SIGINFO
-#elif SIGUSR1
+#elif defined(SIGUSR1)
#define SIGNAL_REQ_INFO SIGUSR1
#endif
-netdissect_options Gndo;
-netdissect_options *gndo = &Gndo;
+#if defined(HAVE_PCAP_DUMP_FLUSH) && defined(SIGUSR2)
+#define SIGNAL_FLUSH_PCAP SIGUSR2
+#endif
+#if defined(HAVE_PCAP_CREATE) || defined(_WIN32)
+static int Bflag; /* buffer size */
+#endif
+#ifdef HAVE_PCAP_DUMP_FTELL64
+static int64_t Cflag; /* rotate dump files after this many bytes */
+#else
+static long Cflag; /* rotate dump files after this many bytes */
+#endif
+static int Cflag_count; /* Keep track of which file number we're writing */
+#ifdef HAVE_PCAP_FINDALLDEVS
static int Dflag; /* list available devices and exit */
-static int dflag; /* print filter code */
+#endif
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+static char *remote_interfaces_source; /* list available devices from this source and exit */
+#endif
+
+/*
+ * This is exported because, in some versions of libpcap, if libpcap
+ * is built with optimizer debugging code (which is *NOT* the default
+ * configuration!), the library *imports*(!) a variable named dflag,
+ * under the expectation that tcpdump is exporting it, to govern
+ * how much debugging information to print when optimizing
+ * the generated BPF code.
+ *
+ * This is a horrible hack; newer versions of libpcap don't import
+ * dflag but, instead, *if* built with optimizer debugging code,
+ * *export* a routine to set that flag.
+ */
+extern int dflag;
+int dflag; /* print filter code */
+static int Gflag; /* rotate dump files after this many seconds */
+static int Gflag_count; /* number of files created with Gflag rotation */
+static time_t Gflag_time; /* The last time_t the dump file was rotated. */
static int Lflag; /* list available data link types and exit */
+static int Iflag; /* rfmon (monitor) mode */
#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
static int Jflag; /* list available time stamp types */
+static int jflag = -1; /* packet time stamp source */
#endif
+static int lflag; /* line-buffered output */
+static int pflag; /* don't go promiscuous */
#ifdef HAVE_PCAP_SETDIRECTION
-int Qflag = -1; /* restrict captured packet by send/receive direction */
+static int Qflag = -1; /* restrict captured packet by send/receive direction */
+#endif
+#ifdef HAVE_PCAP_DUMP_FLUSH
+static int Uflag; /* "unbuffered" output of dump files */
#endif
+static int Wflag; /* recycle output files after this number of files */
+static int WflagChars;
static char *zflag = NULL; /* compress each savefile using a specified command (like gzip or bzip2) */
+static int timeout = 1000; /* default timeout = 1000 ms = 1 s */
+#ifdef HAVE_PCAP_SET_IMMEDIATE_MODE
+static int immediate_mode;
+#endif
+static int count_mode;
static int infodelay;
static int infoprint;
char *program_name;
-int32_t thiszone; /* seconds offset from gmt to local time */
-
/* Forwards */
-static RETSIGTYPE cleanup(int);
-static RETSIGTYPE child_cleanup(int);
-static void usage(void) __attribute__((noreturn));
-static void show_dlts_and_exit(const char *device, pcap_t *pd) __attribute__((noreturn));
+static void (*setsignal (int sig, void (*func)(int)))(int);
+static void cleanup(int);
+static void child_cleanup(int);
+static void print_version(FILE *);
+static void print_usage(FILE *);
static void print_packet(u_char *, const struct pcap_pkthdr *, const u_char *);
-static void ndo_default_print(netdissect_options *, const u_char *, u_int);
static void dump_packet_and_trunc(u_char *, const struct pcap_pkthdr *, const u_char *);
static void dump_packet(u_char *, const struct pcap_pkthdr *, const u_char *);
-static void droproot(const char *, const char *);
-static void ndo_error(netdissect_options *ndo, const char *fmt, ...)
- __attribute__((noreturn))
-#ifdef __ATTRIBUTE___FORMAT_OK
- __attribute__((format (printf, 2, 3)))
-#endif /* __ATTRIBUTE___FORMAT_OK */
- ;
-static void ndo_warning(netdissect_options *ndo, const char *fmt, ...)
-#ifdef __ATTRIBUTE___FORMAT_OK
- __attribute__((format (printf, 2, 3)))
-#endif /* __ATTRIBUTE___FORMAT_OK */
- ;
#ifdef SIGNAL_REQ_INFO
-RETSIGTYPE requestinfo(int);
+static void requestinfo(int);
#endif
-#if defined(USE_WIN32_MM_TIMER)
- #include <MMsystem.h>
- static UINT timer_id;
- static void CALLBACK verbose_stats_dump(UINT, UINT, DWORD_PTR, DWORD_PTR, DWORD_PTR);
-#elif defined(HAVE_ALARM)
- static void verbose_stats_dump(int sig);
+#ifdef SIGNAL_FLUSH_PCAP
+static void flushpcap(int);
#endif
+#ifdef _WIN32
+ static HANDLE timer_handle = INVALID_HANDLE_VALUE;
+ static void CALLBACK verbose_stats_dump(PVOID param, BOOLEAN timer_fired);
+#else /* _WIN32 */
+ static void verbose_stats_dump(int sig);
+#endif /* _WIN32 */
+
static void info(int);
static u_int packets_captured;
-struct printer {
- if_printer f;
- int type;
-};
-
-
-struct ndo_printer {
- if_ndo_printer f;
- int type;
-};
-
-
-static const struct printer printers[] = {
- { NULL, 0 },
-};
-
-static const struct ndo_printer ndo_printers[] = {
- { ether_if_print, DLT_EN10MB },
-#ifdef DLT_IPNET
- { ipnet_if_print, DLT_IPNET },
-#endif
-#ifdef DLT_IEEE802_15_4
- { ieee802_15_4_if_print, DLT_IEEE802_15_4 },
-#endif
-#ifdef DLT_IEEE802_15_4_NOFCS
- { ieee802_15_4_if_print, DLT_IEEE802_15_4_NOFCS },
-#endif
-#ifdef DLT_PPI
- { ppi_if_print, DLT_PPI },
-#endif
-#ifdef DLT_NETANALYZER
- { netanalyzer_if_print, DLT_NETANALYZER },
-#endif
-#ifdef DLT_NETANALYZER_TRANSPARENT
- { netanalyzer_transparent_if_print, DLT_NETANALYZER_TRANSPARENT },
-#endif
-#if defined(DLT_NFLOG) && defined(HAVE_PCAP_NFLOG_H)
- { nflog_if_print, DLT_NFLOG},
-#endif
-#ifdef DLT_CIP
- { cip_if_print, DLT_CIP },
-#endif
-#ifdef DLT_ATM_CLIP
- { cip_if_print, DLT_ATM_CLIP },
-#endif
-#ifdef DLT_IP_OVER_FC
- { ipfc_if_print, DLT_IP_OVER_FC },
-#endif
- { null_if_print, DLT_NULL },
-#ifdef DLT_LOOP
- { null_if_print, DLT_LOOP },
-#endif
-#ifdef DLT_APPLE_IP_OVER_IEEE1394
- { ap1394_if_print, DLT_APPLE_IP_OVER_IEEE1394 },
-#endif
-#if defined(DLT_BLUETOOTH_HCI_H4_WITH_PHDR) && defined(HAVE_PCAP_BLUETOOTH_H)
- { bt_if_print, DLT_BLUETOOTH_HCI_H4_WITH_PHDR},
-#endif
-#ifdef DLT_LANE8023
- { lane_if_print, DLT_LANE8023 },
-#endif
- { arcnet_if_print, DLT_ARCNET },
-#ifdef DLT_ARCNET_LINUX
- { arcnet_linux_if_print, DLT_ARCNET_LINUX },
-#endif
- { raw_if_print, DLT_RAW },
-#ifdef DLT_IPV4
- { raw_if_print, DLT_IPV4 },
-#endif
-#ifdef DLT_IPV6
- { raw_if_print, DLT_IPV6 },
-#endif
-#ifdef HAVE_PCAP_USB_H
-#ifdef DLT_USB_LINUX
- { usb_linux_48_byte_print, DLT_USB_LINUX},
-#endif /* DLT_USB_LINUX */
-#ifdef DLT_USB_LINUX_MMAPPED
- { usb_linux_64_byte_print, DLT_USB_LINUX_MMAPPED},
-#endif /* DLT_USB_LINUX_MMAPPED */
-#endif /* HAVE_PCAP_USB_H */
-#ifdef DLT_SYMANTEC_FIREWALL
- { symantec_if_print, DLT_SYMANTEC_FIREWALL },
-#endif
-#ifdef DLT_C_HDLC
- { chdlc_if_print, DLT_C_HDLC },
-#endif
-#ifdef DLT_HDLC
- { chdlc_if_print, DLT_HDLC },
-#endif
-#ifdef DLT_PPP_ETHER
- { pppoe_if_print, DLT_PPP_ETHER },
-#endif
-#if defined(DLT_PFLOG) && defined(HAVE_NET_PFVAR_H)
- { pflog_if_print, DLT_PFLOG },
-#endif
- { token_if_print, DLT_IEEE802 },
- { fddi_if_print, DLT_FDDI },
-#ifdef DLT_LINUX_SLL
- { sll_if_print, DLT_LINUX_SLL },
-#endif
-#ifdef DLT_FR
- { fr_if_print, DLT_FR },
-#endif
-#ifdef DLT_FRELAY
- { fr_if_print, DLT_FRELAY },
-#endif
-#ifdef DLT_MFR
- { mfr_if_print, DLT_MFR },
-#endif
- { atm_if_print, DLT_ATM_RFC1483 },
-#ifdef DLT_SUNATM
- { sunatm_if_print, DLT_SUNATM },
-#endif
-#ifdef DLT_ENC
- { enc_if_print, DLT_ENC },
-#endif
- { sl_if_print, DLT_SLIP },
-#ifdef DLT_SLIP_BSDOS
- { sl_bsdos_if_print, DLT_SLIP_BSDOS },
-#endif
-#ifdef DLT_LTALK
- { ltalk_if_print, DLT_LTALK },
-#endif
-#ifdef DLT_JUNIPER_ATM1
- { juniper_atm1_print, DLT_JUNIPER_ATM1 },
-#endif
-#ifdef DLT_JUNIPER_ATM2
- { juniper_atm2_print, DLT_JUNIPER_ATM2 },
-#endif
-#ifdef DLT_JUNIPER_MFR
- { juniper_mfr_print, DLT_JUNIPER_MFR },
-#endif
-#ifdef DLT_JUNIPER_MLFR
- { juniper_mlfr_print, DLT_JUNIPER_MLFR },
-#endif
-#ifdef DLT_JUNIPER_MLPPP
- { juniper_mlppp_print, DLT_JUNIPER_MLPPP },
-#endif
-#ifdef DLT_JUNIPER_PPPOE
- { juniper_pppoe_print, DLT_JUNIPER_PPPOE },
-#endif
-#ifdef DLT_JUNIPER_PPPOE_ATM
- { juniper_pppoe_atm_print, DLT_JUNIPER_PPPOE_ATM },
-#endif
-#ifdef DLT_JUNIPER_GGSN
- { juniper_ggsn_print, DLT_JUNIPER_GGSN },
-#endif
-#ifdef DLT_JUNIPER_ES
- { juniper_es_print, DLT_JUNIPER_ES },
-#endif
-#ifdef DLT_JUNIPER_MONITOR
- { juniper_monitor_print, DLT_JUNIPER_MONITOR },
-#endif
-#ifdef DLT_JUNIPER_SERVICES
- { juniper_services_print, DLT_JUNIPER_SERVICES },
-#endif
-#ifdef DLT_JUNIPER_ETHER
- { juniper_ether_print, DLT_JUNIPER_ETHER },
-#endif
-#ifdef DLT_JUNIPER_PPP
- { juniper_ppp_print, DLT_JUNIPER_PPP },
-#endif
-#ifdef DLT_JUNIPER_FRELAY
- { juniper_frelay_print, DLT_JUNIPER_FRELAY },
-#endif
-#ifdef DLT_JUNIPER_CHDLC
- { juniper_chdlc_print, DLT_JUNIPER_CHDLC },
-#endif
-#ifdef DLT_PKTAP
- { pktap_if_print, DLT_PKTAP },
-#endif
-#ifdef DLT_IEEE802_11_RADIO
- { ieee802_11_radio_if_print, DLT_IEEE802_11_RADIO },
-#endif
-#ifdef DLT_IEEE802_11
- { ieee802_11_if_print, DLT_IEEE802_11},
-#endif
-#ifdef DLT_IEEE802_11_RADIO_AVS
- { ieee802_11_radio_avs_if_print, DLT_IEEE802_11_RADIO_AVS },
-#endif
-#ifdef DLT_PRISM_HEADER
- { prism_if_print, DLT_PRISM_HEADER },
-#endif
- { ppp_if_print, DLT_PPP },
-#ifdef DLT_PPP_WITHDIRECTION
- { ppp_if_print, DLT_PPP_WITHDIRECTION },
-#endif
-#ifdef DLT_PPP_BSDOS
- { ppp_bsdos_if_print, DLT_PPP_BSDOS },
-#endif
-#ifdef DLT_PPP_SERIAL
- { ppp_hdlc_if_print, DLT_PPP_SERIAL },
-#endif
- { NULL, 0 },
-};
-
+#ifdef HAVE_PCAP_FINDALLDEVS
static const struct tok status_flags[] = {
#ifdef PCAP_IF_UP
{ PCAP_IF_UP, "Up" },
{ PCAP_IF_RUNNING, "Running" },
#endif
{ PCAP_IF_LOOPBACK, "Loopback" },
+#ifdef PCAP_IF_WIRELESS
+ { PCAP_IF_WIRELESS, "Wireless" },
+#endif
{ 0, NULL }
};
-
-if_printer
-lookup_printer(int type)
-{
- const struct printer *p;
-
- for (p = printers; p->f; ++p)
- if (type == p->type)
- return p->f;
-
- return NULL;
- /* NOTREACHED */
-}
-
-if_ndo_printer
-lookup_ndo_printer(int type)
-{
- const struct ndo_printer *p;
-
- for (p = ndo_printers; p->f; ++p)
- if (type == p->type)
- return p->f;
-
-#if defined(DLT_USER2) && defined(DLT_PKTAP)
- /*
- * Apple incorrectly chose to use DLT_USER2 for their PKTAP
- * header.
- *
- * We map DLT_PKTAP, whether it's DLT_USER2 as it is on Darwin-
- * based OSes or the same value as LINKTYPE_PKTAP as it is on
- * other OSes, to LINKTYPE_PKTAP, so files written with
- * this version of libpcap for a DLT_PKTAP capture have a link-
- * layer header type of LINKTYPE_PKTAP.
- *
- * However, files written on OS X Mavericks for a DLT_PKTAP
- * capture have a link-layer header type of LINKTYPE_USER2.
- * If we don't have a printer for DLT_USER2, and type is
- * DLT_USER2, we look up the printer for DLT_PKTAP and use
- * that.
- */
- if (type == DLT_USER2) {
- for (p = ndo_printers; p->f; ++p)
- if (DLT_PKTAP == p->type)
- return p->f;
- }
#endif
- return NULL;
- /* NOTREACHED */
-}
-
static pcap_t *pd;
+static pcap_dumper_t *pdd = NULL;
static int supports_monitor_mode;
extern int opterr;
extern char *optarg;
-struct print_info {
- netdissect_options *ndo;
- union {
- if_printer printer;
- if_ndo_printer ndo_printer;
- } p;
- int ndo_type;
-};
-
struct dump_info {
char *WFileName;
char *CurrentFileName;
pcap_t *pd;
- pcap_dumper_t *p;
+ pcap_dumper_t *pdd;
+ netdissect_options *ndo;
+#ifdef HAVE_CAPSICUM
+ int dirfd;
+#endif
};
-#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
+#if defined(HAVE_PCAP_SET_PARSER_DEBUG)
+/*
+ * We have pcap_set_parser_debug() in libpcap; declare it (it's not declared
+ * by any libpcap header, because it's a special hack, only available if
+ * libpcap was configured to include it, and only intended for use by
+ * libpcap developers trying to debug the parser for filter expressions).
+ */
+#ifdef _WIN32
+__declspec(dllimport)
+#else /* _WIN32 */
+extern
+#endif /* _WIN32 */
+void pcap_set_parser_debug(int);
+#elif defined(HAVE_PCAP_DEBUG) || defined(HAVE_YYDEBUG)
+/*
+ * We don't have pcap_set_parser_debug() in libpcap, but we do have
+ * pcap_debug or yydebug. Make a local version of pcap_set_parser_debug()
+ * to set the flag, and define HAVE_PCAP_SET_PARSER_DEBUG.
+ */
static void
-show_tstamp_types_and_exit(const char *device, pcap_t *pd)
+pcap_set_parser_debug(int value)
+{
+#ifdef HAVE_PCAP_DEBUG
+ extern int pcap_debug;
+
+ pcap_debug = value;
+#else /* HAVE_PCAP_DEBUG */
+ extern int yydebug;
+
+ yydebug = value;
+#endif /* HAVE_PCAP_DEBUG */
+}
+
+#define HAVE_PCAP_SET_PARSER_DEBUG
+#endif
+
+#if defined(HAVE_PCAP_SET_OPTIMIZER_DEBUG)
+/*
+ * We have pcap_set_optimizer_debug() in libpcap; declare it (it's not declared
+ * by any libpcap header, because it's a special hack, only available if
+ * libpcap was configured to include it, and only intended for use by
+ * libpcap developers trying to debug the optimizer for filter expressions).
+ */
+#ifdef _WIN32
+__declspec(dllimport)
+#else /* _WIN32 */
+extern
+#endif /* _WIN32 */
+void pcap_set_optimizer_debug(int);
+#endif
+
+static void NORETURN
+exit_tcpdump(const int status)
+{
+ nd_cleanup();
+ exit(status);
+}
+
+/* VARARGS */
+static void NORETURN PRINTFLIKE(1, 2)
+error(FORMAT_STRING(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_tcpdump(S_ERR_HOST_PROGRAM);
+ /* NOTREACHED */
+}
+
+/* VARARGS */
+static void PRINTFLIKE(1, 2)
+warning(FORMAT_STRING(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);
+ }
+}
+
+#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
+static void NORETURN
+show_tstamp_types_and_exit(pcap_t *pc, const char *device)
{
int n_tstamp_types;
int *tstamp_types = 0;
const char *tstamp_type_name;
int i;
- n_tstamp_types = pcap_list_tstamp_types(pd, &tstamp_types);
+ n_tstamp_types = pcap_list_tstamp_types(pc, &tstamp_types);
if (n_tstamp_types < 0)
- error("%s", pcap_geterr(pd));
+ error("%s", pcap_geterr(pc));
if (n_tstamp_types == 0) {
fprintf(stderr, "Time stamp type cannot be set for %s\n",
device);
- exit(0);
+ exit_tcpdump(S_SUCCESS);
}
- fprintf(stderr, "Time stamp types for %s (use option -j to set):\n",
+ fprintf(stdout, "Time stamp types for %s (use option -j to set):\n",
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,
+ (void) fprintf(stdout, " %s (%s)\n", tstamp_type_name,
pcap_tstamp_type_val_to_description(tstamp_types[i]));
} else {
- (void) fprintf(stderr, " %d\n", tstamp_types[i]);
+ (void) fprintf(stdout, " %d\n", tstamp_types[i]);
}
}
pcap_free_tstamp_types(tstamp_types);
- exit(0);
+ exit_tcpdump(S_SUCCESS);
}
#endif
-static void
-show_dlts_and_exit(const char *device, pcap_t *pd)
+static void NORETURN
+show_dlts_and_exit(pcap_t *pc, const char *device)
{
- int n_dlts;
+ int n_dlts, i;
int *dlts = 0;
const char *dlt_name;
- n_dlts = pcap_list_datalinks(pd, &dlts);
+ n_dlts = pcap_list_datalinks(pc, &dlts);
if (n_dlts < 0)
- error("%s", pcap_geterr(pd));
+ error("%s", pcap_geterr(pc));
else if (n_dlts == 0 || !dlts)
error("No data link types.");
* monitor mode might be different from the ones available when
* not in monitor mode).
*/
+ (void) fprintf(stdout, "Data link types for ");
if (supports_monitor_mode)
- (void) fprintf(stderr, "Data link types for %s %s (use option -y to set):\n",
+ (void) fprintf(stdout, "%s %s",
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",
+ (void) fprintf(stdout, "%s",
device);
+ (void) fprintf(stdout, " (use option -y to set):\n");
- while (--n_dlts >= 0) {
- dlt_name = pcap_datalink_val_to_name(dlts[n_dlts]);
+ for (i = 0; i < n_dlts; i++) {
+ dlt_name = pcap_datalink_val_to_name(dlts[i]);
if (dlt_name != NULL) {
- (void) fprintf(stderr, " %s (%s)", dlt_name,
- pcap_datalink_val_to_description(dlts[n_dlts]));
+ (void) fprintf(stdout, " %s (%s)", dlt_name,
+ pcap_datalink_val_to_description(dlts[i]));
/*
* 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");
+ if (!has_printer(dlts[i]))
+ (void) fprintf(stdout, " (printing not supported)");
+ fprintf(stdout, "\n");
} else {
- (void) fprintf(stderr, " DLT %d (printing not supported)\n",
- dlts[n_dlts]);
+ (void) fprintf(stdout, " DLT %d (printing not supported)\n",
+ dlts[i]);
}
}
#ifdef HAVE_PCAP_FREE_DATALINKS
pcap_free_datalinks(dlts);
#endif
- exit(0);
+ exit_tcpdump(S_SUCCESS);
}
#ifdef HAVE_PCAP_FINDALLDEVS
-static void
-show_devices_and_exit (void)
+static void NORETURN
+show_devices_and_exit(void)
{
- pcap_if_t *devpointer;
+ pcap_if_t *dev, *devlist;
char ebuf[PCAP_ERRBUF_SIZE];
int i;
- if (pcap_findalldevs(&devpointer, ebuf) < 0)
+ if (pcap_findalldevs(&devlist, 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;
+ for (i = 0, dev = devlist; dev != NULL; i++, dev = dev->next) {
+ printf("%d.%s", i+1, dev->name);
+ if (dev->description != NULL)
+ printf(" (%s)", dev->description);
+ if (dev->flags != 0) {
+ printf(" [");
+ printf("%s", bittok2str(status_flags, "none", dev->flags));
+#ifdef PCAP_IF_WIRELESS
+ if (dev->flags & PCAP_IF_WIRELESS) {
+ switch (dev->flags & PCAP_IF_CONNECTION_STATUS) {
+
+ case PCAP_IF_CONNECTION_STATUS_UNKNOWN:
+ printf(", Association status unknown");
+ break;
+
+ case PCAP_IF_CONNECTION_STATUS_CONNECTED:
+ printf(", Associated");
+ break;
+
+ case PCAP_IF_CONNECTION_STATUS_DISCONNECTED:
+ printf(", Not associated");
+ break;
+
+ case PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE:
+ break;
+ }
+ } else {
+ switch (dev->flags & PCAP_IF_CONNECTION_STATUS) {
+
+ case PCAP_IF_CONNECTION_STATUS_UNKNOWN:
+ printf(", Connection status unknown");
+ break;
+
+ case PCAP_IF_CONNECTION_STATUS_CONNECTED:
+ printf(", Connected");
+ break;
+
+ case PCAP_IF_CONNECTION_STATUS_DISCONNECTED:
+ printf(", Disconnected");
+ break;
+
+ case PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE:
+ break;
+ }
+ }
+#endif
+ printf("]");
}
+ printf("\n");
+ }
+ pcap_freealldevs(devlist);
+ exit_tcpdump(S_SUCCESS);
+}
+#endif /* HAVE_PCAP_FINDALLDEVS */
+
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+static void NORETURN
+show_remote_devices_and_exit(void)
+{
+ pcap_if_t *dev, *devlist;
+ char ebuf[PCAP_ERRBUF_SIZE];
+ int i;
+
+ if (pcap_findalldevs_ex(remote_interfaces_source, NULL, &devlist,
+ ebuf) < 0)
+ error("%s", ebuf);
+ for (i = 0, dev = devlist; dev != NULL; i++, dev = dev->next) {
+ printf("%d.%s", i+1, dev->name);
+ if (dev->description != NULL)
+ printf(" (%s)", dev->description);
+ if (dev->flags != 0)
+ printf(" [%s]", bittok2str(status_flags, "none", dev->flags));
+ printf("\n");
}
- exit(0);
+ pcap_freealldevs(devlist);
+ exit_tcpdump(S_SUCCESS);
}
#endif /* HAVE_PCAP_FINDALLDEVS */
* 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
+ * macOS 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
+ * macOS tcpdump uses -k to specify that packet comments in pcapng 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
+ * macOS tcpdump uses -P to indicate that -w should write pcapng rather
* than pcap files.
+ *
+ * macOS tcpdump also uses -Q to specify expressions that match packet
+ * metadata, including but not limited to the packet direction.
+ * The expression syntax is different from a simple "in|out|inout",
+ * and those expressions aren't accepted by macOS tcpdump, but the
+ * equivalents would be "in" = "dir=in", "out" = "dir=out", and
+ * "inout" = "dir=in or dir=out", and the parser could conceivably
+ * special-case "in", "out", and "inout" as expressions for backwards
+ * compatibility, so all is not (yet) lost.
*/
/*
* 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)
+#if defined(HAVE_PCAP_CREATE) || defined(_WIN32)
#define B_FLAG "B:"
#define B_FLAG_USAGE " [ -B size ]"
-#else /* defined(HAVE_PCAP_CREATE) || defined(WIN32) */
+#else /* defined(HAVE_PCAP_CREATE) || defined(_WIN32) */
#define B_FLAG
#define B_FLAG_USAGE
-#endif /* defined(HAVE_PCAP_CREATE) || defined(WIN32) */
+#endif /* defined(HAVE_PCAP_CREATE) || defined(_WIN32) */
+
+#ifdef HAVE_PCAP_FINDALLDEVS
+#define D_FLAG "D"
+#else
+#define D_FLAG
+#endif
#ifdef HAVE_PCAP_CREATE
#define I_FLAG "I"
#define J_FLAG
#endif /* PCAP_ERROR_TSTAMP_TYPE_NOTSUP */
-#ifdef HAVE_PCAP_FINDALLDEVS
-#ifndef HAVE_PCAP_IF_T
-#undef HAVE_PCAP_FINDALLDEVS
-#endif
+#ifdef USE_LIBSMI
+#define m_FLAG_USAGE "[ -m module ] ..."
#endif
-#ifdef HAVE_PCAP_FINDALLDEVS
-#define D_FLAG "D"
+#ifdef HAVE_PCAP_SETDIRECTION
+#define Q_FLAG "Q:"
+#define Q_FLAG_USAGE " [ -Q in|out|inout ]"
#else
-#define D_FLAG
+#define Q_FLAG
+#define Q_FLAG_USAGE
#endif
#ifdef HAVE_PCAP_DUMP_FLUSH
#define U_FLAG
#endif
-#ifdef HAVE_PCAP_SETDIRECTION
-#define Q_FLAG "Q:"
-#else
-#define Q_FLAG
-#endif
+#define SHORTOPTS "aAb" B_FLAG "c:C:d" D_FLAG "eE:fF:G:hHi:" I_FLAG j_FLAG J_FLAG "KlLm:M:nNOpq" Q_FLAG "r:s:StT:u" U_FLAG "vV:w:W:xXy:Yz:Z:#"
/*
* Long options.
* doesn't make sense; it should be --verbosity={N} or something such
* as that.
*
- * We do not currently have long options with no corresponding short
- * options; for those, we should 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.
+ * 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.
*/
-static struct option longopts[] = {
-#if defined(HAVE_PCAP_CREATE) || defined(WIN32)
+#define OPTION_VERSION 128
+#define OPTION_TSTAMP_PRECISION 129
+#define OPTION_IMMEDIATE_MODE 130
+#define OPTION_PRINT 131
+#define OPTION_LIST_REMOTE_INTERFACES 132
+#define OPTION_TSTAMP_MICRO 133
+#define OPTION_TSTAMP_NANO 134
+#define OPTION_FP_TYPE 135
+#define OPTION_COUNT 136
+
+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' },
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+ { "list-remote-interfaces", required_argument, NULL, OPTION_LIST_REMOTE_INTERFACES },
+#endif
{ "help", no_argument, NULL, 'h' },
{ "interface", required_argument, NULL, 'i' },
#ifdef HAVE_PCAP_CREATE
#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
+ { "micro", no_argument, NULL, OPTION_TSTAMP_MICRO},
+ { "nano", no_argument, NULL, OPTION_TSTAMP_NANO},
+ { "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' },
{ "packet-buffered", no_argument, NULL, 'U' },
#endif
{ "linktype", required_argument, NULL, 'y' },
-#if defined(HAVE_PCAP_DEBUG) || defined(HAVE_YYDEBUG)
+#ifdef HAVE_PCAP_SET_IMMEDIATE_MODE
+ { "immediate-mode", no_argument, NULL, OPTION_IMMEDIATE_MODE },
+#endif
+#ifdef HAVE_PCAP_SET_PARSER_DEBUG
{ "debug-filter-parser", no_argument, NULL, 'Y' },
#endif
{ "relinquish-privileges", required_argument, NULL, 'Z' },
+ { "count", no_argument, NULL, OPTION_COUNT },
+ { "fp-type", no_argument, NULL, OPTION_FP_TYPE },
+ { "number", no_argument, NULL, '#' },
+ { "print", no_argument, NULL, OPTION_PRINT },
+ { "version", no_argument, NULL, OPTION_VERSION },
{ NULL, 0, NULL, 0 }
};
-#ifndef WIN32
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+#define LIST_REMOTE_INTERFACES_USAGE "[ --list-remote-interfaces remote-source ]"
+#else
+#define LIST_REMOTE_INTERFACES_USAGE
+#endif
+
+#ifdef HAVE_PCAP_SET_IMMEDIATE_MODE
+#define IMMEDIATE_MODE_USAGE " [ --immediate-mode ]"
+#else
+#define IMMEDIATE_MODE_USAGE ""
+#endif
+
+#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);
- }
+ if (chroot_dir && !username)
+ error("Chroot without dropping root is insecure");
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);
- }
+ if (chroot(chroot_dir) != 0 || chdir ("/") != 0)
+ error("Couldn't chroot/chdir to '%.64s': %s",
+ chroot_dir, pcap_strerror(errno));
}
-#ifdef HAVE_CAP_NG_H
- int ret = capng_change_id(pw->pw_uid, pw->pw_gid, CAPNG_NO_FLAG);
- if (ret < 0) {
- printf("error : ret %d\n", ret);
+#ifdef HAVE_LIBCAP_NG
+ {
+ int ret = capng_change_id(pw->pw_uid, pw->pw_gid, CAPNG_NO_FLAG);
+ if (ret < 0)
+ error("capng_change_id(): return %d\n", ret);
+ else
+ fprintf(stderr, "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);
+ setgid(pw->pw_gid) != 0 || setuid(pw->pw_uid) != 0)
+ error("Couldn't change to '%.32s' uid=%lu gid=%lu: %s",
+ username,
+ (unsigned long)pw->pw_uid,
+ (unsigned long)pw->pw_gid,
+ pcap_strerror(errno));
+ else {
+ fprintf(stderr, "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 /* HAVE_LIBCAP_NG */
+ } else
+ error("Couldn't find user '%.32s'", username);
+#ifdef HAVE_LIBCAP_NG
+ /* We don't need CAP_SETUID, CAP_SETGID and CAP_SYS_CHROOT any more. */
+DIAG_OFF_ASSIGN_ENUM
+ capng_updatev(
+ CAPNG_DROP,
+ CAPNG_EFFECTIVE | CAPNG_PERMITTED,
+ CAP_SETUID,
+ CAP_SETGID,
+ CAP_SYS_CHROOT,
+ -1);
+DIAG_ON_ASSIGN_ENUM
+ capng_apply(CAPNG_SELECT_BOTH);
+#endif /* HAVE_LIBCAP_NG */
+
}
-#endif /* WIN32 */
+#endif /* _WIN32 */
static int
getWflagChars(int x)
{
char *filename = malloc(PATH_MAX + 1);
if (filename == NULL)
- error("Makefilename: malloc");
+ error("%s: malloc", __func__);
/* Process with strftime if Gflag is set. */
if (Gflag != 0) {
/* Convert Gflag_time to a usable format */
if ((local_tm = localtime(&Gflag_time)) == NULL) {
- error("MakeTimedFilename: localtime");
+ error("%s: localtime", __func__);
}
/* There's no good way to detect an error in strftime since a return
free(filename);
}
-static int tcpdump_printf(netdissect_options *ndo _U_,
- const char *fmt, ...)
+static char *
+get_next_file(FILE *VFile, char *ptr)
{
+ char *ret;
+ size_t len;
- va_list args;
- int ret;
+ ret = fgets(ptr, PATH_MAX, VFile);
+ if (!ret)
+ return NULL;
- va_start(args, fmt);
- ret=vfprintf(stdout, fmt, args);
- va_end(args);
+ len = strlen (ptr);
+ if (len > 0 && ptr[len - 1] == '\n')
+ ptr[len - 1] = '\0';
+
+ return ret;
+}
+
+#ifdef HAVE_CASPER
+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)
+ error("unable to create casper process");
+ 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_CASPER */
+
+#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
+
+#ifdef HAVE_CAPSICUM
+/*
+ * Ensure that, on a dump file's descriptor, we have all the rights
+ * necessary to make the standard I/O library work with an fdopen()ed
+ * FILE * from that descriptor.
+ *
+ * A long time ago in a galaxy far, far away, AT&T decided that, instead
+ * of providing separate APIs for getting and setting the FD_ flags on a
+ * descriptor, getting and setting the O_ flags on a descriptor, and
+ * locking files, they'd throw them all into a kitchen-sink fcntl() call
+ * along the lines of ioctl(), the fact that ioctl() operations are
+ * largely specific to particular character devices but fcntl() operations
+ * are either generic to all descriptors or generic to all descriptors for
+ * regular files nonwithstanding.
+ *
+ * The Capsicum people decided that fine-grained control of descriptor
+ * operations was required, so that you need to grant permission for
+ * reading, writing, seeking, and fcntl-ing. The latter, courtesy of
+ * AT&T's decision, means that "fcntl-ing" isn't a thing, but a motley
+ * collection of things, so there are *individual* fcntls for which
+ * permission needs to be granted.
+ *
+ * The FreeBSD standard I/O people implemented some optimizations that
+ * requires that the standard I/O routines be able to determine whether
+ * the descriptor for the FILE * is open append-only or not; as that
+ * descriptor could have come from an open() rather than an fopen(),
+ * that requires that it be able to do an F_GETFL fcntl() to read
+ * the O_ flags.
+ *
+ * Tcpdump uses ftell() to determine how much data has been written
+ * to a file in order to, when used with -C, determine when it's time
+ * to rotate capture files. ftell() therefore needs to do an lseek()
+ * to find out the file offset and must, thanks to the aforementioned
+ * optimization, also know whether the descriptor is open append-only
+ * or not.
+ *
+ * The net result of all the above is that we need to grant CAP_SEEK,
+ * CAP_WRITE, and CAP_FCNTL with the CAP_FCNTL_GETFL subcapability.
+ *
+ * Perhaps this is the universe's way of saying that either
+ *
+ * 1) there needs to be an fopenat() call and a pcap_dump_openat() call
+ * using it, so that Capsicum-capable tcpdump wouldn't need to do
+ * an fdopen()
+ *
+ * or
+ *
+ * 2) there needs to be a cap_fdopen() call in the FreeBSD standard
+ * I/O library that knows what rights are needed by the standard
+ * I/O library, based on the open mode, and assigns them, perhaps
+ * with an additional argument indicating, for example, whether
+ * seeking should be allowed, so that tcpdump doesn't need to know
+ * what the standard I/O library happens to require this week.
+ */
+static void
+set_dumper_capsicum_rights(pcap_dumper_t *p)
+{
+ int fd = fileno(pcap_dump_file(p));
+ cap_rights_t rights;
+
+ cap_rights_init(&rights, CAP_SEEK, CAP_WRITE, CAP_FCNTL);
+ if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS) {
+ error("unable to limit dump descriptor");
+ }
+ if (cap_fcntls_limit(fd, CAP_FCNTL_GETFL) < 0 && errno != ENOSYS) {
+ error("unable to limit dump descriptor fcntls");
+ }
+}
+#endif
+
+/*
+ * Copy arg vector into a new buffer, concatenating arguments with spaces.
+ */
+static char *
+copy_argv(char **argv)
+{
+ char **p;
+ size_t len = 0;
+ char *buf;
+ char *src, *dst;
+
+ p = argv;
+ if (*p == NULL)
+ return 0;
+
+ while (*p)
+ len += strlen(*p++) + 1;
+
+ buf = (char *)malloc(len);
+ if (buf == NULL)
+ error("%s: malloc", __func__);
+
+ p = argv;
+ dst = buf;
+ while ((src = *p++) != NULL) {
+ while ((*dst++ = *src++) != '\0')
+ ;
+ dst[-1] = ' ';
+ }
+ dst[-1] = '\0';
+
+ return buf;
+}
+
+/*
+ * On Windows, we need to open the file in binary mode, so that
+ * we get all the bytes specified by the size we get from "fstat()".
+ * On UNIX, that's not necessary. O_BINARY is defined on Windows;
+ * we define it as 0 if it's not defined, so it does nothing.
+ */
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+static char *
+read_infile(char *fname)
+{
+ int i, fd;
+ ssize_t cc;
+ char *cp;
+ our_statb buf;
+
+ fd = open(fname, O_RDONLY|O_BINARY);
+ if (fd < 0)
+ error("can't open %s: %s", fname, pcap_strerror(errno));
+
+ if (our_fstat(fd, &buf) < 0)
+ error("can't stat %s: %s", fname, pcap_strerror(errno));
+
+ /*
+ * Reject files whose size doesn't fit into an int; a filter
+ * *that* large will probably be too big.
+ */
+ if (buf.st_size > INT_MAX)
+ error("%s is too large", fname);
+
+ cp = malloc((u_int)buf.st_size + 1);
+ if (cp == NULL)
+ error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
+ fname, pcap_strerror(errno));
+ cc = read(fd, cp, (u_int)buf.st_size);
+ if (cc < 0)
+ error("read %s: %s", fname, pcap_strerror(errno));
+ if (cc != buf.st_size)
+ error("short read %s (%d != %d)", fname, (int) cc,
+ (int)buf.st_size);
+
+ close(fd);
+ /* replace "# comment" with spaces */
+ for (i = 0; i < cc; i++) {
+ if (cp[i] == '#')
+ while (i < cc && cp[i] != '\n')
+ cp[i++] = ' ';
+ }
+ cp[cc] = '\0';
+ return (cp);
+}
+
+#ifdef HAVE_PCAP_FINDALLDEVS
+static long
+parse_interface_number(const char *device)
+{
+ const char *p;
+ long devnum;
+ char *end;
+
+ /*
+ * Search for a colon, terminating any scheme at the beginning
+ * of the device.
+ */
+ p = strchr(device, ':');
+ if (p != NULL) {
+ /*
+ * We found it. Is it followed by "//"?
+ */
+ p++; /* skip the : */
+ if (strncmp(p, "//", 2) == 0) {
+ /*
+ * Yes. Search for the next /, at the end of the
+ * authority part of the URL.
+ */
+ p += 2; /* skip the // */
+ p = strchr(p, '/');
+ if (p != NULL) {
+ /*
+ * OK, past the / is the path.
+ */
+ device = p + 1;
+ }
+ }
+ }
+ devnum = strtol(device, &end, 10);
+ if (device != end && *end == '\0') {
+ /*
+ * It's all-numeric, but is it a valid number?
+ */
+ if (devnum <= 0) {
+ /*
+ * No, it's not an ordinal.
+ */
+ error("Invalid adapter index");
+ }
+ return (devnum);
+ } else {
+ /*
+ * It's not all-numeric; return -1, so our caller
+ * knows that.
+ */
+ return (-1);
+ }
+}
+
+static char *
+find_interface_by_number(const char *url
+#ifndef HAVE_PCAP_FINDALLDEVS_EX
+_U_
+#endif
+, long devnum)
+{
+ pcap_if_t *dev, *devlist;
+ long i;
+ char ebuf[PCAP_ERRBUF_SIZE];
+ char *device;
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+ const char *endp;
+ char *host_url;
+#endif
+ int status;
- return ret;
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+ /*
+ * Search for a colon, terminating any scheme at the beginning
+ * of the URL.
+ */
+ endp = strchr(url, ':');
+ if (endp != NULL) {
+ /*
+ * We found it. Is it followed by "//"?
+ */
+ endp++; /* skip the : */
+ if (strncmp(endp, "//", 2) == 0) {
+ /*
+ * Yes. Search for the next /, at the end of the
+ * authority part of the URL.
+ */
+ endp += 2; /* skip the // */
+ endp = strchr(endp, '/');
+ } else
+ endp = NULL;
+ }
+ if (endp != NULL) {
+ /*
+ * OK, everything from device to endp is a URL to hand
+ * to pcap_findalldevs_ex().
+ */
+ endp++; /* Include the trailing / in the URL; pcap_findalldevs_ex() requires it */
+ host_url = malloc(endp - url + 1);
+ if (host_url == NULL && (endp - url + 1) > 0)
+ error("Invalid allocation for host");
+
+ memcpy(host_url, url, endp - url);
+ host_url[endp - url] = '\0';
+ status = pcap_findalldevs_ex(host_url, NULL, &devlist, ebuf);
+ free(host_url);
+ } else
+#endif
+ status = pcap_findalldevs(&devlist, ebuf);
+ if (status < 0)
+ error("%s", ebuf);
+ /*
+ * Look for the devnum-th entry in the list of devices (1-based).
+ */
+ for (i = 0, dev = devlist; i < devnum-1 && dev != NULL;
+ i++, dev = dev->next)
+ ;
+ if (dev == NULL)
+ error("Invalid adapter index");
+ device = strdup(dev->name);
+ pcap_freealldevs(devlist);
+ return (device);
}
+#endif
+
+#ifdef HAVE_PCAP_OPEN
+/*
+ * Prefixes for rpcap URLs.
+ */
+static char rpcap_prefix[] = "rpcap://";
+static char rpcap_ssl_prefix[] = "rpcaps://";
+#endif
-static struct print_info
-get_print_info(int type)
+static pcap_t *
+open_interface(const char *device, netdissect_options *ndo, char *ebuf)
{
- 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);
+ pcap_t *pc;
+#ifdef HAVE_PCAP_CREATE
+ int status;
+ char *cp;
+#endif
+
+#ifdef HAVE_PCAP_OPEN
+ /*
+ * Is this an rpcap URL?
+ */
+ if (strncmp(device, rpcap_prefix, sizeof(rpcap_prefix) - 1) == 0 ||
+ strncmp(device, rpcap_ssl_prefix, sizeof(rpcap_ssl_prefix) - 1) == 0) {
+ /*
+ * Yes. Open it with pcap_open().
+ */
+ *ebuf = '\0';
+ pc = pcap_open(device, ndo->ndo_snaplen,
+ pflag ? 0 : PCAP_OPENFLAG_PROMISCUOUS, timeout, NULL,
+ ebuf);
+ if (pc == NULL) {
+ /*
+ * If this failed with "No such device" or "The system
+ * cannot find the device specified", that means
+ * the interface doesn't exist; return NULL, so that
+ * the caller can see whether the device name is
+ * actually an interface index.
+ */
+ if (strstr(ebuf, "No such device") != NULL ||
+ strstr(ebuf, "The system cannot find the device specified") != NULL)
+ return (NULL);
+ error("%s", ebuf);
}
+ if (*ebuf)
+ warning("%s", ebuf);
+ return (pc);
}
- return (printinfo);
-}
-
-static char *
-get_next_file(FILE *VFile, char *ptr)
-{
- char *ret;
+#endif /* HAVE_PCAP_OPEN */
- ret = fgets(ptr, PATH_MAX, VFile);
- if (!ret)
- return NULL;
+#ifdef HAVE_PCAP_CREATE
+ pc = pcap_create(device, ebuf);
+ if (pc == NULL) {
+ /*
+ * If this failed with "No such device", that means
+ * the interface doesn't exist; return NULL, so that
+ * the caller can see whether the device name is
+ * actually an interface index.
+ */
+ if (strstr(ebuf, "No such device") != NULL)
+ return (NULL);
+ error("%s", ebuf);
+ }
+#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
+ if (Jflag)
+ show_tstamp_types_and_exit(pc, device);
+#endif
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+ status = pcap_set_tstamp_precision(pc, ndo->ndo_tstamp_precision);
+ if (status != 0)
+ error("%s: Can't set %ssecond time stamp precision: %s",
+ device,
+ tstamp_precision_to_string(ndo->ndo_tstamp_precision),
+ pcap_statustostr(status));
+#endif
- if (ptr[strlen(ptr) - 1] == '\n')
- ptr[strlen(ptr) - 1] = '\0';
+#ifdef HAVE_PCAP_SET_IMMEDIATE_MODE
+ if (immediate_mode) {
+ status = pcap_set_immediate_mode(pc, 1);
+ if (status != 0)
+ error("%s: Can't set immediate mode: %s",
+ device, pcap_statustostr(status));
+ }
+#endif
+ /*
+ * Is this an interface that supports monitor mode?
+ */
+ if (pcap_can_set_rfmon(pc) == 1)
+ supports_monitor_mode = 1;
+ else
+ supports_monitor_mode = 0;
+ if (ndo->ndo_snaplen != 0) {
+ /*
+ * A snapshot length was explicitly specified;
+ * use it.
+ */
+ status = pcap_set_snaplen(pc, ndo->ndo_snaplen);
+ if (status != 0)
+ error("%s: Can't set snapshot length: %s",
+ device, pcap_statustostr(status));
+ }
+ status = pcap_set_promisc(pc, !pflag);
+ if (status != 0)
+ error("%s: Can't set promiscuous mode: %s",
+ device, pcap_statustostr(status));
+ if (Iflag) {
+ status = pcap_set_rfmon(pc, 1);
+ if (status != 0)
+ error("%s: Can't set monitor mode: %s",
+ device, pcap_statustostr(status));
+ }
+ status = pcap_set_timeout(pc, timeout);
+ if (status != 0)
+ error("%s: pcap_set_timeout failed: %s",
+ device, pcap_statustostr(status));
+ if (Bflag != 0) {
+ status = pcap_set_buffer_size(pc, 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(pc, jflag);
+ if (status < 0)
+ error("%s: Can't set time stamp type: %s",
+ device, pcap_statustostr(status));
+ else if (status > 0)
+ warning("When trying to set timestamp type '%s' on %s: %s",
+ pcap_tstamp_type_val_to_name(jflag), device,
+ pcap_statustostr(status));
+ }
+#endif
+ status = pcap_activate(pc);
+ if (status < 0) {
+ /*
+ * pcap_activate() failed.
+ */
+ cp = pcap_geterr(pc);
+ if (status == PCAP_ERROR)
+ error("%s", cp);
+ else if (status == PCAP_ERROR_NO_SUCH_DEVICE) {
+ /*
+ * Return an error for our caller to handle.
+ */
+ snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s: %s\n(%s)",
+ device, pcap_statustostr(status), cp);
+ } else if (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. */
+ /* FIXME: incrementing the index this way is not going to work well
+ * when the index is 9 or greater but the only consequence in this
+ * specific case would be an error message that looks a bit odd.
+ */
+ 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\n"
+ "and use %s as the tcpdump interface",
+ device, newdev, parent, newdev);
+ }
+#endif
+ else
+ error("%s: %s", device,
+ pcap_statustostr(status));
+ pcap_close(pc);
+ return (NULL);
+ } else if (status > 0) {
+ /*
+ * pcap_activate() succeeded, but it's warning us
+ * of a problem it had.
+ */
+ cp = pcap_geterr(pc);
+ 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(pc, Qflag);
+ if (status != 0)
+ error("%s: pcap_setdirection() failed: %s",
+ device, pcap_geterr(pc));
+ }
+#endif /* HAVE_PCAP_SETDIRECTION */
+#else /* HAVE_PCAP_CREATE */
+ *ebuf = '\0';
+ /*
+ * If no snapshot length was specified, or a length of 0 was
+ * specified, default to 256KB.
+ */
+ if (ndo->ndo_snaplen == 0)
+ ndo->ndo_snaplen = MAXIMUM_SNAPLEN;
+ pc = pcap_open_live(device, ndo->ndo_snaplen, !pflag, timeout, ebuf);
+ if (pc == NULL) {
+ /*
+ * If this failed with "No such device", that means
+ * the interface doesn't exist; return NULL, so that
+ * the caller can see whether the device name is
+ * actually an interface index.
+ */
+ if (strstr(ebuf, "No such device") != NULL)
+ return (NULL);
+ error("%s", ebuf);
+ }
+ if (*ebuf)
+ warning("%s", ebuf);
+#endif /* HAVE_PCAP_CREATE */
- return ret;
+ return (pc);
}
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;
+ int cnt, op, i;
+ bpf_u_int32 localnet = 0, netmask = 0;
+ char *cp, *infile, *cmdbuf, *device, *RFileName, *VFileName, *WFileName;
+ char *endp;
pcap_handler callback;
- int type;
int dlt;
- int new_dlt;
const char *dlt_name;
struct bpf_program fcode;
-#ifndef WIN32
- RETSIGTYPE (*oldhandler)(int);
+#ifndef _WIN32
+ void (*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;
+ const char *username = NULL;
+#ifndef _WIN32
+ const char *chroot_dir = NULL;
+#endif
char *ret = NULL;
char *end;
#ifdef HAVE_PCAP_FINDALLDEVS
- pcap_if_t *devpointer;
- int devnum;
+ pcap_if_t *devlist;
+ long devnum;
#endif
int status;
FILE *VFile;
-#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;
+#ifdef HAVE_CAPSICUM
+ cap_rights_t rights;
+ int cansandbox;
+#endif /* HAVE_CAPSICUM */
+ int Oflag = 1; /* run filter code optimizer */
+ int yflag_dlt = -1;
+ const char *yflag_dlt_name = NULL;
+ int print = 0;
+ long Cflagmult;
+
+ netdissect_options Ndo;
+ netdissect_options *ndo = &Ndo;
+
+ /*
+ * Initialize the netdissect code.
+ */
+ if (nd_init(ebuf, sizeof(ebuf)) == -1)
+ error("%s", ebuf);
+
+ memset(ndo, 0, sizeof(*ndo));
+ ndo_set_function_pointers(ndo);
cnt = -1;
device = NULL;
VFile = NULL;
WFileName = NULL;
dlt = -1;
- if ((cp = strrchr(argv[0], '/')) != NULL)
- program_name = cp + 1;
+ if ((cp = strrchr(argv[0], PATH_SEPARATOR)) != NULL)
+ ndo->program_name = program_name = cp + 1;
else
- program_name = argv[0];
+ ndo->program_name = program_name = argv[0];
+
+#if defined(HAVE_PCAP_WSOCKINIT)
+ if (pcap_wsockinit() != 0)
+ error("Attempting to initialize Winsock failed");
+#elif defined(HAVE_WSOCKINIT)
+ if (wsockinit() != 0)
+ error("Attempting to initialize Winsock failed");
+#endif
+ /*
+ * On platforms where the CPU doesn't support unaligned loads,
+ * force unaligned accesses to abort with SIGBUS, rather than
+ * being fixed up (slowly) by the OS kernel; on those platforms,
+ * misaligned accesses are bugs, and we want tcpdump to crash so
+ * that the bugs are reported.
+ */
if (abort_on_misalignment(ebuf, sizeof(ebuf)) < 0)
error("%s", ebuf);
-#ifdef 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)
+ (op = getopt_long(argc, argv, SHORTOPTS, longopts, NULL)) != -1)
switch (op) {
case 'a':
break;
case 'A':
- ++Aflag;
+ ++ndo->ndo_Aflag;
break;
case 'b':
- ++bflag;
+ ++ndo->ndo_bflag;
break;
-#if defined(HAVE_PCAP_CREATE) || defined(WIN32)
+#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) */
+#endif /* defined(HAVE_PCAP_CREATE) || defined(_WIN32) */
case 'c':
cnt = atoi(optarg);
break;
case 'C':
- Cflag = atoi(optarg) * 1000000;
- if (Cflag < 0)
+ errno = 0;
+#ifdef HAVE_PCAP_DUMP_FTELL64
+ Cflag = strtoint64_t(optarg, &endp, 10);
+#else
+ Cflag = strtol(optarg, &endp, 10);
+#endif
+ if (endp == optarg || errno != 0 || Cflag <= 0)
error("invalid file size %s", optarg);
+
+ if (*endp == '\0') {
+ /*
+ * There's nothing after the file size,
+ * so the size is in units of 1 MB
+ * (1,000,000 bytes).
+ */
+ Cflagmult = 1000000;
+ } else {
+ /*
+ * There's something after the file
+ * size.
+ *
+ * If it's a single letter, then:
+ *
+ * if the letter is k or K, the size
+ * is in units of 1 KiB (1024 bytes);
+ *
+ * if the letter is m or M, the size
+ * is in units of 1 MiB (1,048,576 bytes);
+ *
+ * if the letter is g or G, the size
+ * is in units of 1 GiB (1,073,741,824 bytes).
+ *
+ * Otherwise, it's an error.
+ */
+ switch (*endp) {
+
+ case 'k':
+ case 'K':
+ Cflagmult = 1024;
+ break;
+
+ case 'm':
+ case 'M':
+ Cflagmult = 1024*1024;
+ break;
+
+ case 'g':
+ case 'G':
+ Cflagmult = 1024*1024*1024;
+ break;
+
+ default:
+ error("invalid file size %s", optarg);
+ }
+
+ /*
+ * OK, there was a letter that we treat
+ * as a units indication; was there
+ * anything after it?
+ */
+ endp++;
+ if (*endp != '\0') {
+ /* Yes - error */
+ error("invalid file size %s", optarg);
+ }
+ }
+
+ /*
+ * Will multiplying it by multiplier overflow?
+ */
+#ifdef HAVE_PCAP_DUMP_FTELL64
+ if (Cflag > INT64_T_CONSTANT(0x7fffffffffffffff) / Cflagmult)
+#else
+ if (Cflag > LONG_MAX / Cflagmult)
+#endif
+ error("file size %s is too large", optarg);
+ Cflag *= Cflagmult;
break;
case 'd':
++dflag;
break;
+#ifdef HAVE_PCAP_FINDALLDEVS
case 'D':
Dflag++;
break;
+#endif
+
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+ case OPTION_LIST_REMOTE_INTERFACES:
+ remote_interfaces_source = optarg;
+ break;
+#endif
case 'L':
Lflag++;
break;
case 'e':
- ++eflag;
+ ++ndo->ndo_eflag;
break;
case 'E':
#ifndef HAVE_LIBCRYPTO
warning("crypto code not compiled in");
#endif
- gndo->ndo_espsecret = optarg;
+ ndo->ndo_espsecret = optarg;
break;
case 'f':
- ++fflag;
+ ++ndo->ndo_fflag;
break;
case 'F':
/* 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));
+ error("%s: can't get current time: %s",
+ __func__, pcap_strerror(errno));
}
break;
case 'h':
- usage();
+ print_usage(stdout);
+ exit_tcpdump(S_SUCCESS);
break;
case 'H':
- ++Hflag;
+ ++ndo->ndo_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;
#endif
case 'l':
-#ifdef WIN32
+#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
+ * not _WIN32, if, for example, MinGW has its own
* C library that is more UNIX-compatible.
*/
setvbuf(stdout, NULL, _IONBF, 0);
-#else /* WIN32 */
+#else /* _WIN32 */
#ifdef HAVE_SETLINEBUF
setlinebuf(stdout);
#else
setvbuf(stdout, NULL, _IOLBF, 0);
#endif
-#endif /* WIN32 */
+#endif /* _WIN32 */
+ lflag = 1;
break;
case 'K':
- ++Kflag;
+ ++ndo->ndo_Kflag;
break;
case 'm':
-#ifdef LIBSMI
- if (smiLoadModule(optarg) == 0) {
- error("could not load MIB module %s", optarg);
+ if (nd_have_smi_support()) {
+ if (nd_load_smi_module(optarg, ebuf, sizeof(ebuf)) == -1)
+ error("%s", ebuf);
+ } else {
+ (void)fprintf(stderr, "%s: ignoring option `-m %s' ",
+ program_name, optarg);
+ (void)fprintf(stderr, "(no libsmi support)\n");
}
- 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':
#ifndef HAVE_LIBCRYPTO
warning("crypto code not compiled in");
#endif
- sigsecret = optarg;
+ ndo->ndo_sigsecret = optarg;
break;
case 'n':
- ++nflag;
+ ++ndo->ndo_nflag;
break;
case 'N':
- ++Nflag;
+ ++ndo->ndo_Nflag;
break;
case 'O':
break;
case 'q':
- ++qflag;
- ++suppress_default_print;
+ ++ndo->ndo_qflag;
+ ++ndo->ndo_suppress_default_print;
break;
#ifdef HAVE_PCAP_SETDIRECTION
case 'Q':
- if (strcasecmp(optarg, "in") == 0)
+ if (ascii_strcasecmp(optarg, "in") == 0)
Qflag = PCAP_D_IN;
- else if (strcasecmp(optarg, "out") == 0)
+ else if (ascii_strcasecmp(optarg, "out") == 0)
Qflag = PCAP_D_OUT;
- else if (strcasecmp(optarg, "inout") == 0)
+ else if (ascii_strcasecmp(optarg, "inout") == 0)
Qflag = PCAP_D_INOUT;
else
error("unknown capture direction `%s'", optarg);
RFileName = optarg;
break;
- case 'R':
- Rflag = 0;
- break;
-
case 's':
- snaplen = strtol(optarg, &end, 0);
+ ndo->ndo_snaplen = (int)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;
+ || ndo->ndo_snaplen < 0 || ndo->ndo_snaplen > MAXIMUM_SNAPLEN)
+ error("invalid snaplen %s (must be >= 0 and <= %d)",
+ optarg, MAXIMUM_SNAPLEN);
break;
case 'S':
- ++Sflag;
+ ++ndo->ndo_Sflag;
break;
case 't':
- ++tflag;
+ ++ndo->ndo_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;
+ if (ascii_strcasecmp(optarg, "vat") == 0)
+ ndo->ndo_packettype = PT_VAT;
+ else if (ascii_strcasecmp(optarg, "wb") == 0)
+ ndo->ndo_packettype = PT_WB;
+ else if (ascii_strcasecmp(optarg, "rpc") == 0)
+ ndo->ndo_packettype = PT_RPC;
+ else if (ascii_strcasecmp(optarg, "rtp") == 0)
+ ndo->ndo_packettype = PT_RTP;
+ else if (ascii_strcasecmp(optarg, "rtcp") == 0)
+ ndo->ndo_packettype = PT_RTCP;
+ else if (ascii_strcasecmp(optarg, "snmp") == 0)
+ ndo->ndo_packettype = PT_SNMP;
+ else if (ascii_strcasecmp(optarg, "cnfp") == 0)
+ ndo->ndo_packettype = PT_CNFP;
+ else if (ascii_strcasecmp(optarg, "tftp") == 0)
+ ndo->ndo_packettype = PT_TFTP;
+ else if (ascii_strcasecmp(optarg, "aodv") == 0)
+ ndo->ndo_packettype = PT_AODV;
+ else if (ascii_strcasecmp(optarg, "carp") == 0)
+ ndo->ndo_packettype = PT_CARP;
+ else if (ascii_strcasecmp(optarg, "radius") == 0)
+ ndo->ndo_packettype = PT_RADIUS;
+ else if (ascii_strcasecmp(optarg, "zmtp1") == 0)
+ ndo->ndo_packettype = PT_ZMTP1;
+ else if (ascii_strcasecmp(optarg, "vxlan") == 0)
+ ndo->ndo_packettype = PT_VXLAN;
+ else if (ascii_strcasecmp(optarg, "pgm") == 0)
+ ndo->ndo_packettype = PT_PGM;
+ else if (ascii_strcasecmp(optarg, "pgm_zmtp1") == 0)
+ ndo->ndo_packettype = PT_PGM_ZMTP1;
+ else if (ascii_strcasecmp(optarg, "lmp") == 0)
+ ndo->ndo_packettype = PT_LMP;
+ else if (ascii_strcasecmp(optarg, "resp") == 0)
+ ndo->ndo_packettype = PT_RESP;
+ else if (ascii_strcasecmp(optarg, "ptp") == 0)
+ ndo->ndo_packettype = PT_PTP;
+ else if (ascii_strcasecmp(optarg, "someip") == 0)
+ ndo->ndo_packettype = PT_SOMEIP;
+ else if (ascii_strcasecmp(optarg, "domain") == 0)
+ ndo->ndo_packettype = PT_DOMAIN;
+ else if (ascii_strcasecmp(optarg, "quic") == 0)
+ ndo->ndo_packettype = PT_QUIC;
else
error("unknown packet type `%s'", optarg);
break;
case 'u':
- ++uflag;
+ ++ndo->ndo_uflag;
break;
#ifdef HAVE_PCAP_DUMP_FLUSH
#endif
case 'v':
- ++vflag;
+ ++ndo->ndo_vflag;
break;
case 'V':
case 'W':
Wflag = atoi(optarg);
- if (Wflag < 0)
+ if (Wflag <= 0)
error("invalid number of output files %s", optarg);
WflagChars = getWflagChars(Wflag);
break;
case 'x':
- ++xflag;
- ++suppress_default_print;
+ ++ndo->ndo_xflag;
+ ++ndo->ndo_suppress_default_print;
break;
case 'X':
- ++Xflag;
- ++suppress_default_print;
+ ++ndo->ndo_Xflag;
+ ++ndo->ndo_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);
+ yflag_dlt_name = optarg;
+ yflag_dlt =
+ pcap_datalink_name_to_val(yflag_dlt_name);
+ if (yflag_dlt < 0)
+ error("invalid data link type %s", yflag_dlt_name);
break;
-#if defined(HAVE_PCAP_DEBUG) || defined(HAVE_YYDEBUG)
+#ifdef HAVE_PCAP_SET_PARSER_DEBUG
case 'Y':
{
/* Undocumented flag */
-#ifdef HAVE_PCAP_DEBUG
- extern int pcap_debug;
- pcap_debug = 1;
-#else
- extern int yydebug;
- yydebug = 1;
-#endif
+ pcap_set_parser_debug(1);
}
break;
#endif
case 'z':
- zflag = strdup(optarg);
+ zflag = optarg;
break;
case 'Z':
- username = strdup(optarg);
+ username = optarg;
+ break;
+
+ case '#':
+ ndo->ndo_packet_number = 1;
+ break;
+
+ case OPTION_VERSION:
+ print_version(stdout);
+ exit_tcpdump(S_SUCCESS);
+ break;
+
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+ case OPTION_TSTAMP_PRECISION:
+ ndo->ndo_tstamp_precision = tstamp_precision_from_string(optarg);
+ if (ndo->ndo_tstamp_precision < 0)
+ error("unsupported time stamp precision");
+ break;
+#endif
+
+#ifdef HAVE_PCAP_SET_IMMEDIATE_MODE
+ case OPTION_IMMEDIATE_MODE:
+ immediate_mode = 1;
+ break;
+#endif
+
+ case OPTION_PRINT:
+ print = 1;
+ break;
+
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+ case OPTION_TSTAMP_MICRO:
+ ndo->ndo_tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO;
+ break;
+
+ case OPTION_TSTAMP_NANO:
+ ndo->ndo_tstamp_precision = PCAP_TSTAMP_PRECISION_NANO;
+ break;
+#endif
+
+ case OPTION_FP_TYPE:
+ /*
+ * Print out the type of floating-point arithmetic
+ * we're doing; it's probably IEEE, unless somebody
+ * tries to run this on a VAX, but the precision
+ * may differ (e.g., it might be 32-bit, 64-bit,
+ * or 80-bit).
+ */
+ float_type_check(0x4e93312d);
+ return 0;
+
+ case OPTION_COUNT:
+ count_mode = 1;
break;
default:
- usage();
+ print_usage(stderr);
+ exit_tcpdump(S_ERR_HOST_PROGRAM);
/* NOTREACHED */
}
if (Dflag)
show_devices_and_exit();
#endif
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+ if (remote_interfaces_source != NULL)
+ show_remote_devices_and_exit();
+#endif
- switch (tflag) {
+#if defined(DLT_LINUX_SLL2) && defined(HAVE_PCAP_SET_DATALINK)
+/* Set default linktype DLT_LINUX_SLL2 when capturing on the "any" device */
+ if (device != NULL &&
+ strncmp (device, "any", strlen("any")) == 0
+ && yflag_dlt == -1)
+ yflag_dlt = DLT_LINUX_SLL2;
+#endif
- case 0: /* Default */
- case 4: /* Default + Date*/
- thiszone = gmt2local(0);
- break;
+ switch (ndo->ndo_tflag) {
+ case 0: /* Default */
case 1: /* No time stamp */
case 2: /* Unix timeval style */
- case 3: /* Microseconds since previous packet */
- case 5: /* Microseconds since first packet */
+ case 3: /* Microseconds/nanoseconds since previous packet */
+ case 4: /* Date + Default */
+ case 5: /* Microseconds/nanoseconds since first packet */
break;
default: /* Not supported */
break;
}
- if (fflag != 0 && (VFileName != NULL || RFileName != NULL))
+ if (ndo->ndo_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.");
+ /*
+ * If we're printing dissected packets to the standard output,
+ * and either the standard output is a terminal or we're doing
+ * "line" buffering, set the capture timeout to .1 second rather
+ * than 1 second, as the user's probably expecting to see packets
+ * pop up immediately shortly after they arrive.
+ *
+ * XXX - would there be some value appropriate for all cases,
+ * based on, say, the buffer size and packet input rate?
+ */
+ if ((WFileName == NULL || print) && (isatty(1) || lflag))
+ timeout = 100;
+
#ifdef WITH_CHROOT
/* if run as root, prepare for chrooting */
if (getuid() == 0 || geteuid() == 0) {
* In either case, we're reading a savefile, not doing
* a live capture.
*/
-#ifndef WIN32
+#ifndef _WIN32
/*
* We don't need network access, so relinquish any set-UID
* or set-GID privileges we have (if any).
*/
if (setgid(getgid()) != 0 || setuid(getuid()) != 0 )
fprintf(stderr, "Warning: setgid/setuid failed !\n");
-#endif /* WIN32 */
+#endif /* _WIN32 */
if (VFileName != NULL) {
if (VFileName[0] == '-' && VFileName[1] == '\0')
VFile = stdin;
VFile = fopen(VFileName, "r");
if (VFile == NULL)
- error("Unable to open file: %s\n", strerror(errno));
+ error("Unable to open file: %s\n", pcap_strerror(errno));
ret = get_next_file(VFile, VFileLine);
if (!ret)
RFileName = VFileLine;
}
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+ pd = pcap_open_offline_with_tstamp_precision(RFileName,
+ ndo->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);
+ fprintf(stderr, "reading from file %s", RFileName);
if (dlt_name == NULL) {
- fprintf(stderr, "reading from file %s, link-type %u\n",
- RFileName, dlt);
+ fprintf(stderr, ", link-type %u", dlt);
} else {
- fprintf(stderr,
- "reading from file %s, link-type %s (%s)\n",
- RFileName, dlt_name,
- pcap_datalink_val_to_description(dlt));
+ fprintf(stderr, ", link-type %s (%s)", dlt_name,
+ pcap_datalink_val_to_description(dlt));
}
+ fprintf(stderr, ", snapshot length %d\n", pcap_snapshot(pd));
+#ifdef DLT_LINUX_SLL2
+ if (dlt == DLT_LINUX_SLL2)
+ fprintf(stderr, "Warning: interface names might be incorrect\n");
+#endif
+ } else if (dflag && !device) {
+ int dump_dlt = DLT_EN10MB;
+ /*
+ * We're dumping the compiled code without an explicit
+ * device specification. (If a device is specified, we
+ * definitely want to open it to use the DLT of that device.)
+ * Either default to DLT_EN10MB with a warning, or use
+ * the user-specified value if supplied.
+ */
+ /*
+ * If no snapshot length was specified, or a length of 0 was
+ * specified, default to 256KB.
+ */
+ if (ndo->ndo_snaplen == 0)
+ ndo->ndo_snaplen = MAXIMUM_SNAPLEN;
+ /*
+ * If a DLT was specified with the -y flag, use that instead.
+ */
+ if (yflag_dlt != -1)
+ dump_dlt = yflag_dlt;
+ else
+ fprintf(stderr, "Warning: assuming Ethernet\n");
+ pd = pcap_open_dead(dump_dlt, ndo->ndo_snaplen);
} else {
/*
* We're doing a live capture.
*/
if (device == NULL) {
+ /*
+ * No interface was specified. Pick one.
+ */
+#ifdef HAVE_PCAP_FINDALLDEVS
+ /*
+ * Find the list of interfaces, and pick
+ * the first interface.
+ */
+ if (pcap_findalldevs(&devlist, ebuf) == -1)
+ error("%s", ebuf);
+ if (devlist == NULL)
+ error("no interfaces available for capture");
+ device = strdup(devlist->name);
+ pcap_freealldevs(devlist);
+#else /* HAVE_PCAP_FINDALLDEVS */
+ /*
+ * Use whatever interface pcap_lookupdev()
+ * chooses.
+ */
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);
+#endif
}
- 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
/*
- * Is this an interface that supports monitor mode?
+ * Try to open the interface with the specified name.
*/
- 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) {
+ pd = open_interface(device, ndo, ebuf);
+ if (pd == NULL) {
/*
- * pcap_activate() failed.
+ * That failed. If we can get a list of
+ * interfaces, and the interface name
+ * is purely numeric, try to use it as
+ * a 1-based index in the list of
+ * interfaces.
*/
- 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);
- else
- error("%s: %s", device,
- pcap_statustostr(status));
- } else if (status > 0) {
+#ifdef HAVE_PCAP_FINDALLDEVS
+ devnum = parse_interface_number(device);
+ if (devnum == -1) {
+ /*
+ * It's not a number; just report
+ * the open error and fail.
+ */
+ error("%s", ebuf);
+ }
+
/*
- * pcap_activate() succeeded, but it's warning us
- * of a problem it had.
+ * OK, it's a number; try to find the
+ * interface with that index, and try
+ * to open it.
+ *
+ * find_interface_by_number() exits if it
+ * couldn't be found.
+ */
+ device = find_interface_by_number(device, devnum);
+ pd = open_interface(device, ndo, ebuf);
+ if (pd == NULL)
+ error("%s", ebuf);
+#else /* HAVE_PCAP_FINDALLDEVS */
+ /*
+ * We can't get a list of interfaces; just
+ * fail.
*/
- 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 */
+#endif /* HAVE_PCAP_FINDALLDEVS */
+ }
+
/*
- * Let user own process after socket has been opened.
+ * Let user own process after capture device has
+ * been opened.
*/
-#ifndef WIN32
+#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)
+#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) */
+#endif /* !defined(HAVE_PCAP_CREATE) && defined(_WIN32) */
if (Lflag)
- show_dlts_and_exit(device, pd);
- if (gndo->ndo_dlt >= 0) {
+ show_dlts_and_exit(pd, device);
+ if (yflag_dlt >= 0) {
#ifdef HAVE_PCAP_SET_DATALINK
- if (pcap_set_datalink(pd, gndo->ndo_dlt) < 0)
+ if (pcap_set_datalink(pd, yflag_dlt) < 0)
error("%s", pcap_geterr(pd));
#else
/*
* data link type, so we only let them
* set it to what it already is.
*/
- if (gndo->ndo_dlt != pcap_datalink(pd)) {
+ if (yflag_dlt != pcap_datalink(pd)) {
error("%s is not one of the DLTs supported by this device\n",
- gndo->ndo_dltname);
+ yflag_dlt_name);
}
#endif
(void)fprintf(stderr, "%s: data link type %s\n",
- program_name, gndo->ndo_dltname);
+ program_name,
+ pcap_datalink_val_to_name(yflag_dlt));
(void)fflush(stderr);
}
i = pcap_snapshot(pd);
- if (snaplen < i) {
- warning("snaplen raised from %d to %d", snaplen, i);
- snaplen = i;
+ if (ndo->ndo_snaplen < i) {
+ if (ndo->ndo_snaplen != 0)
+ warning("snaplen raised from %d to %d", ndo->ndo_snaplen, i);
+ ndo->ndo_snaplen = i;
+ } else if (ndo->ndo_snaplen > i) {
+ warning("snaplen lowered from %d to %d", ndo->ndo_snaplen, i);
+ ndo->ndo_snaplen = i;
}
- if(fflag != 0) {
+ if(ndo->ndo_fflag != 0) {
if (pcap_lookupnet(device, &localnet, &netmask, ebuf) < 0) {
warning("foreign (-f) flag used but: %s", ebuf);
}
else
cmdbuf = copy_argv(&argv[optind]);
+#ifdef HAVE_PCAP_SET_OPTIMIZER_DEBUG
+ pcap_set_optimizer_debug(dflag);
+#endif
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);
+ pcap_freecode(&fcode);
+ exit_tcpdump(S_SUCCESS);
}
- init_addrtoname(gndo, localnet, netmask);
- init_checksum();
-#ifndef WIN32
+#ifdef HAVE_CASPER
+ if (!ndo->ndo_nflag)
+ capdns = capdns_setup();
+#endif /* HAVE_CASPER */
+
+ init_print(ndo, localnet, netmask);
+
+#ifndef _WIN32
(void)setsignal(SIGPIPE, cleanup);
(void)setsignal(SIGTERM, cleanup);
+#endif /* _WIN32 */
(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
+#ifndef _WIN32
if ((oldhandler = setsignal(SIGHUP, cleanup)) != SIG_DFL)
(void)setsignal(SIGHUP, oldhandler);
-#endif /* WIN32 */
+#endif /* _WIN32 */
-#ifndef 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,
* 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 (getuid() == 0 || geteuid() == 0) {
+#ifdef HAVE_LIBCAP_NG
+ /* Initialize capng */
+ capng_clear(CAPNG_SELECT_BOTH);
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);
+DIAG_OFF_ASSIGN_ENUM
+ capng_updatev(
+ CAPNG_ADD,
+ CAPNG_PERMITTED | CAPNG_EFFECTIVE,
+ CAP_SETUID,
+ CAP_SETGID,
+ -1);
+DIAG_ON_ASSIGN_ENUM
+ }
+ if (chroot_dir) {
+DIAG_OFF_ASSIGN_ENUM
+ capng_update(
+ CAPNG_ADD,
+ CAPNG_PERMITTED | CAPNG_EFFECTIVE,
+ CAP_SYS_CHROOT
+ );
+DIAG_ON_ASSIGN_ENUM
}
- }
-#endif /* HAVE_CAP_NG_H */
- if (getuid() == 0 || geteuid() == 0) {
+ if (WFileName) {
+DIAG_OFF_ASSIGN_ENUM
+ capng_update(
+ CAPNG_ADD,
+ CAPNG_PERMITTED | CAPNG_EFFECTIVE,
+ CAP_DAC_OVERRIDE
+ );
+DIAG_ON_ASSIGN_ENUM
+ }
+ capng_apply(CAPNG_SELECT_BOTH);
+#endif /* HAVE_LIBCAP_NG */
if (username || chroot_dir)
droproot(username, chroot_dir);
}
-#endif /* WIN32 */
+#endif /* _WIN32 */
if (pcap_setfilter(pd, &fcode) < 0)
error("%s", pcap_geterr(pd));
+#ifdef HAVE_CAPSICUM
+ if (RFileName == NULL && VFileName == NULL && pcap_fileno(pd) != -1) {
+ static const unsigned long cmds[] = { BIOCGSTATS, BIOCROTZBUF };
+
+ /*
+ * The various libpcap devices use a combination of
+ * read (bpf), ioctl (bpf, netmap), poll (netmap)
+ * so we add the relevant access rights.
+ */
+ cap_rights_init(&rights, CAP_IOCTL, CAP_READ, CAP_EVENT);
+ 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);
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)
+ pdd = pcap_dump_open(pd, dumpinfo.CurrentFileName);
+#ifdef HAVE_LIBCAP_NG
+ /* Give up CAP_DAC_OVERRIDE capability.
+ * Only allow it to be restored if the -C or -G flag have been
+ * set since we may need to create more files later on.
+ */
+ capng_update(
+ CAPNG_DROP,
+ (Cflag || Gflag ? 0 : CAPNG_PERMITTED)
+ | CAPNG_EFFECTIVE,
+ CAP_DAC_OVERRIDE
+ );
+ capng_apply(CAPNG_SELECT_BOTH);
+#endif /* HAVE_LIBCAP_NG */
+ if (pdd == NULL)
error("%s", pcap_geterr(pd));
+#ifdef HAVE_CAPSICUM
+ set_dumper_capsicum_rights(pdd);
+#endif
if (Cflag != 0 || Gflag != 0) {
- callback = dump_packet_and_trunc;
+#ifdef HAVE_CAPSICUM
+ /*
+ * basename() and dirname() may modify their input buffer
+ * and they do since FreeBSD 12.0, but they didn't before.
+ * Hence use the return value only, but always assume the
+ * input buffer has been modified and would need to be
+ * reset before the next use.
+ */
+ char *WFileName_copy;
+
+ if ((WFileName_copy = strdup(WFileName)) == NULL) {
+ error("Unable to allocate memory for file %s",
+ WFileName);
+ }
+ DIAG_OFF_C11_EXTENSIONS
+ dumpinfo.WFileName = strdup(basename(WFileName_copy));
+ DIAG_ON_C11_EXTENSIONS
+ if (dumpinfo.WFileName == NULL) {
+ error("Unable to allocate memory for file %s",
+ WFileName);
+ }
+ free(WFileName_copy);
+
+ if ((WFileName_copy = strdup(WFileName)) == NULL) {
+ error("Unable to allocate memory for file %s",
+ WFileName);
+ }
+ DIAG_OFF_C11_EXTENSIONS
+ char *WFileName_dirname = dirname(WFileName_copy);
+ DIAG_ON_C11_EXTENSIONS
+ dumpinfo.dirfd = open(WFileName_dirname,
+ O_DIRECTORY | O_RDONLY);
+ if (dumpinfo.dirfd < 0) {
+ error("unable to open directory %s",
+ WFileName_dirname);
+ }
+ free(WFileName_dirname);
+ free(WFileName_copy);
+
+ 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");
+ }
+ if (cap_fcntls_limit(dumpinfo.dirfd, CAP_FCNTL_GETFL) < 0 &&
+ errno != ENOSYS) {
+ error("unable to limit dump descriptor fcntls");
+ }
+#else /* !HAVE_CAPSICUM */
dumpinfo.WFileName = WFileName;
+#endif
+ callback = dump_packet_and_trunc;
dumpinfo.pd = pd;
- dumpinfo.p = p;
+ dumpinfo.pdd = pdd;
pcap_userdata = (u_char *)&dumpinfo;
} else {
callback = dump_packet;
- pcap_userdata = (u_char *)p;
+ dumpinfo.WFileName = WFileName;
+ dumpinfo.pd = pd;
+ dumpinfo.pdd = pdd;
+ pcap_userdata = (u_char *)&dumpinfo;
}
+ if (print) {
+ dlt = pcap_datalink(pd);
+ ndo->ndo_if_printer = get_if_printer(dlt);
+ dumpinfo.ndo = ndo;
+ } else
+ dumpinfo.ndo = NULL;
+
#ifdef HAVE_PCAP_DUMP_FLUSH
if (Uflag)
- pcap_dump_flush(p);
+ pcap_dump_flush(pdd);
#endif
} else {
- type = pcap_datalink(pd);
- printinfo = get_print_info(type);
+ dlt = pcap_datalink(pd);
+ ndo->ndo_if_printer = get_if_printer(dlt);
callback = print_packet;
- pcap_userdata = (u_char *)&printinfo;
+ pcap_userdata = (u_char *)ndo;
}
#ifdef SIGNAL_REQ_INFO
if (RFileName == NULL)
(void)setsignal(SIGNAL_REQ_INFO, requestinfo);
#endif
+#ifdef SIGNAL_FLUSH_PCAP
+ (void)setsignal(SIGNAL_FLUSH_PCAP, flushpcap);
+#endif
- if (vflag > 0 && WFileName) {
+ if (ndo->ndo_vflag > 0 && WFileName && RFileName == NULL && !print) {
+ /*
+ * When capturing to a file, if "--print" wasn't specified,
+ *"-v" means tcpdump should, once per second,
+ * "v"erbosely report the number of packets captured.
+ * Except when reading from a file, because -r, -w and -v
+ * together used to make a corner case, in which pcap_loop()
+ * errored due to EINTR (see GH #155 for details).
+ */
+#ifdef _WIN32
/*
- * When capturing to a file, "-v" means tcpdump should,
- * every 10 secodns, "v"erbosely report the number of
- * packets captured.
+ * https://blogs.msdn.microsoft.com/oldnewthing/20151230-00/?p=92741
+ *
+ * suggests that this dates back to W2K.
+ *
+ * I don't know what a "long wait" is, but we'll assume
+ * that printing the stats could be a "long wait".
*/
-#ifdef USE_WIN32_MM_TIMER
- /* call verbose_stats_dump() each 1000 +/-100msec */
- timer_id = timeSetEvent(1000, 100, verbose_stats_dump, 0, TIME_PERIODIC);
+ CreateTimerQueueTimer(&timer_handle, NULL,
+ verbose_stats_dump, NULL, 1000, 1000,
+ WT_EXECUTEDEFAULT|WT_EXECUTELONGFUNCTION);
setvbuf(stderr, NULL, _IONBF, 0);
-#elif defined(HAVE_ALARM)
+#else /* _WIN32 */
+ /*
+ * Assume this is UN*X, and that it has setitimer(); that
+ * dates back to UNIX 95.
+ */
+ struct itimerval timer;
(void)setsignal(SIGALRM, verbose_stats_dump);
- alarm(1);
-#endif
+ timer.it_interval.tv_sec = 1;
+ timer.it_interval.tv_usec = 0;
+ timer.it_value.tv_sec = 1;
+ timer.it_value.tv_usec = 1;
+ setitimer(ITIMER_REAL, &timer, NULL);
+#endif /* _WIN32 */
}
-#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) {
+ if (!ndo->ndo_vflag && !WFileName) {
(void)fprintf(stderr,
- "%s: verbose output suppressed, use -v or -vv for full protocol decode\n",
+ "%s: verbose output suppressed, use -v[v]... 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);
+ (void)fprintf(stderr, "listening on %s", device);
if (dlt_name == NULL) {
- (void)fprintf(stderr, "listening on %s, link-type %u, capture size %u bytes\n",
- device, dlt, snaplen);
+ (void)fprintf(stderr, ", link-type %u", dlt);
} 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)fprintf(stderr, ", link-type %s (%s)", dlt_name,
+ pcap_datalink_val_to_description(dlt));
}
+ (void)fprintf(stderr, ", snapshot length %d bytes\n", ndo->ndo_snaplen);
(void)fflush(stderr);
}
-#endif /* WIN32 */
+
+#ifdef HAVE_CAPSICUM
+ cansandbox = (VFileName == NULL && zflag == NULL);
+#ifdef HAVE_CASPER
+ cansandbox = (cansandbox && (ndo->ndo_nflag || capdns != NULL));
+#else
+ cansandbox = (cansandbox && ndo->ndo_nflag);
+#endif /* HAVE_CASPER */
+ if (cansandbox && cap_enter() < 0 && errno != ENOSYS)
+ error("unable to enter the capability mode");
+#endif /* HAVE_CAPSICUM */
+
do {
status = pcap_loop(pd, cnt, callback, pcap_userdata);
if (WFileName == NULL) {
if (VFileName != NULL) {
ret = get_next_file(VFile, VFileLine);
if (ret) {
+ int new_dlt;
+
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 (new_dlt != dlt) {
+ /*
+ * The new file has a different
+ * link-layer header type from the
+ * previous one.
+ */
+ if (WFileName != NULL) {
+ /*
+ * We're writing raw packets
+ * that match the filter to
+ * a pcap file. pcap files
+ * don't support multiple
+ * different link-layer
+ * header types, so we fail
+ * here.
+ */
+ error("%s: new dlt does not match original", RFileName);
+ }
+
+ /*
+ * We're printing the decoded packets;
+ * switch to the new DLT.
+ *
+ * To do that, we need to change
+ * the printer, change the DLT name,
+ * and recompile the filter with
+ * the new DLT.
+ */
+ dlt = new_dlt;
+ ndo->ndo_if_printer = get_if_printer(dlt);
+ if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
+ error("%s", pcap_geterr(pd));
}
- if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
- error("%s", pcap_geterr(pd));
+
+ /*
+ * Set the filter on the new file.
+ */
if (pcap_setfilter(pd, &fcode) < 0)
error("%s", pcap_geterr(pd));
+
+ /*
+ * Report the new file.
+ */
+ dlt_name = pcap_datalink_val_to_name(dlt);
+ fprintf(stderr, "reading from file %s", RFileName);
+ if (dlt_name == NULL) {
+ fprintf(stderr, ", link-type %u", dlt);
+ } else {
+ fprintf(stderr, ", link-type %s (%s)",
+ dlt_name,
+ pcap_datalink_val_to_description(dlt));
+ }
+ fprintf(stderr, ", snapshot length %d\n", pcap_snapshot(pd));
}
}
}
while (ret != NULL);
+ if (count_mode && RFileName != NULL)
+ fprintf(stdout, "%u packet%s\n", packets_captured,
+ PLURAL_SUFFIX(packets_captured));
+
free(cmdbuf);
- exit(status == -1 ? 1 : 0);
+ pcap_freecode(&fcode);
+ exit_tcpdump(status == -1 ? 1 : 0);
+}
+
+/*
+ * Catch a signal.
+ */
+static void
+(*setsignal (int sig, void (*func)(int)))(int)
+{
+#ifdef _WIN32
+ return (signal(sig, func));
+#else
+ struct sigaction old, new;
+
+ memset(&new, 0, sizeof(new));
+ new.sa_handler = func;
+ if (sig == SIGCHLD)
+ new.sa_flags = SA_RESTART;
+ if (sigaction(sig, &new, &old) < 0)
+ return (SIG_ERR);
+ return (old.sa_handler);
+#endif
}
/* make a clean exit on interrupts */
-static RETSIGTYPE
+static void
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 _WIN32
+ if (timer_handle != INVALID_HANDLE_VALUE) {
+ DeleteTimerQueueTimer(NULL, timer_handle, NULL);
+ CloseHandle(timer_handle);
+ timer_handle = INVALID_HANDLE_VALUE;
+ }
+#else /* _WIN32 */
+ struct itimerval timer;
+
+ timer.it_interval.tv_sec = 0;
+ timer.it_interval.tv_usec = 0;
+ timer.it_value.tv_sec = 0;
+ timer.it_value.tv_usec = 0;
+ setitimer(ITIMER_REAL, &timer, NULL);
+#endif /* _WIN32 */
#ifdef HAVE_PCAP_BREAKLOOP
/*
(void)fflush(stdout);
info(1);
}
- exit(0);
+ exit_tcpdump(S_SUCCESS);
#endif
}
waiting a child processes to die
*/
#if defined(HAVE_FORK) || defined(HAVE_VFORK)
-static RETSIGTYPE
+static void
child_cleanup(int signo _U_)
{
wait(NULL);
#endif /* HAVE_FORK && HAVE_VFORK */
static void
-info(register int verbose)
+info(int verbose)
{
- struct pcap_stat stat;
+ struct pcap_stat stats;
/*
* 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) {
+ stats.ps_ifdrop = 0;
+ if (pcap_stats(pd, &stats) < 0) {
(void)fprintf(stderr, "pcap_stats: %s\n", pcap_geterr(pd));
infoprint = 0;
return;
fputs(", ", stderr);
else
putc('\n', stderr);
- (void)fprintf(stderr, "%u packet%s received by filter", stat.ps_recv,
- PLURAL_SUFFIX(stat.ps_recv));
+ (void)fprintf(stderr, "%u packet%s received by filter", stats.ps_recv,
+ PLURAL_SUFFIX(stats.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) {
+ (void)fprintf(stderr, "%u packet%s dropped by kernel", stats.ps_drop,
+ PLURAL_SUFFIX(stats.ps_drop));
+ if (stats.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));
+ stats.ps_ifdrop, PLURAL_SUFFIX(stats.ps_ifdrop));
} else
putc('\n', stderr);
infoprint = 0;
}
#if defined(HAVE_FORK) || defined(HAVE_VFORK)
+#ifdef HAVE_FORK
+#define fork_subprocess() fork()
+#else
+#define fork_subprocess() vfork()
+#endif
static void
compress_savefile(const char *filename)
{
-# ifdef HAVE_FORK
- if (fork())
-# else
- if (vfork())
-# endif
+ pid_t child;
+
+ child = fork_subprocess();
+ if (child == -1) {
+ fprintf(stderr,
+ "compress_savefile: fork failed: %s\n",
+ pcap_strerror(errno));
+ return;
+ }
+ if (child != 0) {
+ /* Parent process. */
return;
+ }
+
/*
- * Set to lowest priority so that this doesn't disturb the capture
+ * Child process.
+ * Set to lowest priority so that this doesn't disturb the capture.
*/
#ifdef NZERO
setpriority(PRIO_PROCESS, 0, NZERO - 1);
#endif
if (execlp(zflag, zflag, filename, (char *)NULL) == -1)
fprintf(stderr,
- "compress_savefile:execlp(%s, %s): %s\n",
+ "compress_savefile: execlp(%s, %s) failed: %s\n",
zflag,
filename,
- strerror(errno));
-# ifdef HAVE_FORK
- exit(1);
-# else
- _exit(1);
-# endif
+ pcap_strerror(errno));
+#ifdef HAVE_FORK
+ exit(S_ERR_HOST_PROGRAM);
+#else
+ _exit(S_ERR_HOST_PROGRAM);
+#endif
}
#else /* HAVE_FORK && HAVE_VFORK */
static void
/* 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));
+ error("%s: can't get current_time: %s",
+ __func__, 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 */
/*
* Close the current file and open a new one.
*/
- pcap_dump_close(dump_info->p);
+ pcap_dump_close(dump_info->pdd);
/*
* Compress the file we just closed, if the user asked for it
if (Cflag == 0 && Wflag > 0 && Gflag_count >= Wflag) {
(void)fprintf(stderr, "Maximum file limit reached: %d\n",
Wflag);
- exit(0);
+ info(1);
+ exit_tcpdump(S_SUCCESS);
/* NOTREACHED */
}
if (dump_info->CurrentFileName != NULL)
else
MakeFilename(dump_info->CurrentFileName, dump_info->WFileName, 0, 0);
-#ifdef HAVE_CAP_NG_H
+#ifdef HAVE_LIBCAP_NG
capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
- capng_apply(CAPNG_EFFECTIVE);
-#endif /* HAVE_CAP_NG_H */
- dump_info->p = pcap_dump_open(dump_info->pd, dump_info->CurrentFileName);
-#ifdef HAVE_CAP_NG_H
+ capng_apply(CAPNG_SELECT_BOTH);
+#endif /* HAVE_LIBCAP_NG */
+#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->pdd = pcap_dump_fopen(dump_info->pd, fp);
+#else /* !HAVE_CAPSICUM */
+ dump_info->pdd = pcap_dump_open(dump_info->pd, dump_info->CurrentFileName);
+#endif
+#ifdef HAVE_LIBCAP_NG
capng_update(CAPNG_DROP, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
- capng_apply(CAPNG_EFFECTIVE);
-#endif /* HAVE_CAP_NG_H */
- if (dump_info->p == NULL)
+ capng_apply(CAPNG_SELECT_BOTH);
+#endif /* HAVE_LIBCAP_NG */
+ if (dump_info->pdd == NULL)
error("%s", pcap_geterr(pd));
+#ifdef HAVE_CAPSICUM
+ set_dumper_capsicum_rights(dump_info->pdd);
+#endif
}
}
* 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) {
+ if (Cflag != 0) {
+#ifdef HAVE_PCAP_DUMP_FTELL64
+ int64_t size = pcap_dump_ftell64(dump_info->pdd);
+#else
/*
- * Close the current file and open a new one.
+ * XXX - this only handles a Cflag value > 2^31-1 on
+ * LP64 platforms; to handle ILP32 (32-bit UN*X and
+ * Windows) or LLP64 (64-bit Windows) would require
+ * a version of libpcap with pcap_dump_ftell64().
*/
- pcap_dump_close(dump_info->p);
+ long size = pcap_dump_ftell(dump_info->pdd);
+#endif
- /*
- * Compress the file we just closed, if the user asked for it
- */
- if (zflag != NULL)
- compress_savefile(dump_info->CurrentFileName);
+ if (size == -1)
+ error("ftell fails on output file");
+ if (size > Cflag) {
+#ifdef HAVE_CAPSICUM
+ FILE *fp;
+ int fd;
+#endif
+
+ /*
+ * Close the current file and open a new one.
+ */
+ pcap_dump_close(dump_info->pdd);
+
+ /*
+ * 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;
+ 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("%s: malloc", __func__);
+ MakeFilename(dump_info->CurrentFileName, dump_info->WFileName, Cflag_count, WflagChars);
+#ifdef HAVE_LIBCAP_NG
+ capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
+ capng_apply(CAPNG_SELECT_BOTH);
+#endif /* HAVE_LIBCAP_NG */
+#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->pdd = pcap_dump_fopen(dump_info->pd, fp);
+#else /* !HAVE_CAPSICUM */
+ dump_info->pdd = pcap_dump_open(dump_info->pd, dump_info->CurrentFileName);
+#endif
+#ifdef HAVE_LIBCAP_NG
+ capng_update(CAPNG_DROP, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
+ capng_apply(CAPNG_SELECT_BOTH);
+#endif /* HAVE_LIBCAP_NG */
+ if (dump_info->pdd == NULL)
+ error("%s", pcap_geterr(pd));
+#ifdef HAVE_CAPSICUM
+ set_dumper_capsicum_rights(dump_info->pdd);
+#endif
}
- 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);
- dump_info->p = pcap_dump_open(dump_info->pd, dump_info->CurrentFileName);
- if (dump_info->p == NULL)
- error("%s", pcap_geterr(pd));
}
- pcap_dump((u_char *)dump_info->p, h, sp);
+ pcap_dump((u_char *)dump_info->pdd, h, sp);
#ifdef HAVE_PCAP_DUMP_FLUSH
if (Uflag)
- pcap_dump_flush(dump_info->p);
+ pcap_dump_flush(dump_info->pdd);
#endif
+ if (dump_info->ndo != NULL)
+ pretty_print_packet(dump_info->ndo, h, sp, packets_captured);
+
--infodelay;
if (infoprint)
info(0);
static void
dump_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
{
+ struct dump_info *dump_info;
+
++packets_captured;
++infodelay;
- pcap_dump(user, h, sp);
+ dump_info = (struct dump_info *)user;
+
+ pcap_dump((u_char *)dump_info->pdd, h, sp);
#ifdef HAVE_PCAP_DUMP_FLUSH
if (Uflag)
- pcap_dump_flush((pcap_dumper_t *)user);
+ pcap_dump_flush(dump_info->pdd);
#endif
+ if (dump_info->ndo != NULL)
+ pretty_print_packet(dump_info->ndo, h, sp, packets_captured);
+
--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;
- 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');
+ if (!count_mode)
+ pretty_print_packet((netdissect_options *)user, h, sp, packets_captured);
--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.
- */
+#ifdef SIGNAL_REQ_INFO
static void
-ndo_default_print(netdissect_options *ndo, const u_char *bp, u_int length)
+requestinfo(int signo _U_)
{
- hex_and_ascii_print(ndo, "\n\t", bp, length); /* pass on lf and identation string */
+ if (infodelay)
+ ++infoprint;
+ else
+ info(0);
}
+#endif
-void
-default_print(const u_char *bp, u_int length)
+#ifdef SIGNAL_FLUSH_PCAP
+static void
+flushpcap(int signo _U_)
{
- ndo_default_print(gndo, bp, length);
+ if (pdd != NULL)
+ pcap_dump_flush(pdd);
}
+#endif
-#ifdef SIGNAL_REQ_INFO
-RETSIGTYPE requestinfo(int signo _U_)
+static void
+print_packets_captured (void)
{
- if (infodelay)
- ++infoprint;
- else
- info(0);
+ static u_int prev_packets_captured, first = 1;
+
+ if (infodelay == 0 && (first || packets_captured != prev_packets_captured)) {
+ fprintf(stderr, "Got %u\r", packets_captured);
+ first = 0;
+ prev_packets_captured = packets_captured;
+ }
}
-#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_)
+#ifdef _WIN32
+static void CALLBACK verbose_stats_dump(PVOID param _U_,
+ BOOLEAN timer_fired _U_)
{
- struct pcap_stat stat;
-
- if (infodelay == 0 && pcap_stats(pd, &stat) >= 0)
- fprintf(stderr, "Got %u\r", packets_captured);
+ print_packets_captured();
}
-#elif defined(HAVE_ALARM)
+#else /* _WIN32 */
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);
+ print_packets_captured();
}
-#endif
+#endif /* _WIN32 */
+DIAG_OFF_DEPRECATION
static void
-usage(void)
+print_version(FILE *f)
{
- extern char version[];
#ifndef HAVE_PCAP_LIB_VERSION
-#if defined(WIN32) || defined(HAVE_PCAP_VERSION)
+ #ifdef HAVE_PCAP_VERSION
extern char pcap_version[];
-#else /* defined(WIN32) || defined(HAVE_PCAP_VERSION) */
+ #else /* HAVE_PCAP_VERSION */
static char pcap_version[] = "unknown";
-#endif /* defined(WIN32) || defined(HAVE_PCAP_VERSION) */
+ #endif /* HAVE_PCAP_VERSION */
#endif /* HAVE_PCAP_LIB_VERSION */
+ const char *smi_version_string;
+ (void)fprintf(f, "%s version " PACKAGE_VERSION "\n", program_name);
#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());
+ (void)fprintf(f, "%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 */
+ (void)fprintf(f, "libpcap version %s\n", pcap_version);
#endif /* HAVE_PCAP_LIB_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 ]\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 ] [ -T type ] [ -V file ] [ -w file ]\n");
- (void)fprintf(stderr,
-"\t\t[ -W filecount ] [ -y datalinktype ] [ -z command ]\n");
- (void)fprintf(stderr,
-"\t\t[ -Z user ] [ expression ]\n");
- exit(1);
-}
-
+#if defined(HAVE_LIBCRYPTO) && defined(SSLEAY_VERSION)
+ (void)fprintf (f, "%s\n", SSLeay_version(SSLEAY_VERSION));
+#endif
-/* VARARGS */
-static void
-ndo_error(netdissect_options *ndo _U_, const char *fmt, ...)
-{
- va_list ap;
+ smi_version_string = nd_smi_version_string();
+ if (smi_version_string != NULL)
+ (void)fprintf (f, "SMI-library: %s\n", smi_version_string);
- (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 */
+#if defined(__SANITIZE_ADDRESS__)
+ (void)fprintf (f, "Compiled with AddressSanitizer/GCC.\n");
+#elif defined(__has_feature)
+# if __has_feature(address_sanitizer)
+ (void)fprintf (f, "Compiled with AddressSanitizer/Clang.\n");
+# elif __has_feature(memory_sanitizer)
+ (void)fprintf (f, "Compiled with MemorySanitizer/Clang.\n");
+# endif
+#endif /* __SANITIZE_ADDRESS__ or __has_feature */
}
+DIAG_ON_DEPRECATION
-/* VARARGS */
static void
-ndo_warning(netdissect_options *ndo _U_, const char *fmt, ...)
+print_usage(FILE *f)
{
- 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);
- }
+ print_version(f);
+ (void)fprintf(f,
+"Usage: %s [-Abd" D_FLAG "efhH" I_FLAG J_FLAG "KlLnNOpqStu" U_FLAG "vxX#]" B_FLAG_USAGE " [ -c count ] [--count]\n", program_name);
+ (void)fprintf(f,
+"\t\t[ -C file_size ] [ -E algo:secret ] [ -F file ] [ -G seconds ]\n");
+ (void)fprintf(f,
+"\t\t[ -i interface ]" IMMEDIATE_MODE_USAGE j_FLAG_USAGE "\n");
+#ifdef HAVE_PCAP_FINDALLDEVS_EX
+ (void)fprintf(f,
+"\t\t" LIST_REMOTE_INTERFACES_USAGE "\n");
+#endif
+#ifdef USE_LIBSMI
+ (void)fprintf(f,
+"\t\t" m_FLAG_USAGE "\n");
+#endif
+ (void)fprintf(f,
+"\t\t[ -M secret ] [ --number ] [ --print ]" Q_FLAG_USAGE "\n");
+ (void)fprintf(f,
+"\t\t[ -r file ] [ -s snaplen ] [ -T type ] [ --version ]\n");
+ (void)fprintf(f,
+"\t\t[ -V file ] [ -w file ] [ -W filecount ] [ -y datalinktype ]\n");
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+ (void)fprintf(f,
+"\t\t[ --time-stamp-precision precision ] [ --micro ] [ --nano ]\n");
+#endif
+ (void)fprintf(f,
+"\t\t[ -z postrotate-command ] [ -Z user ] [ expression ]\n");
}
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 8
- * End:
- */
projects / tcpdump / blobdiff