#include <grp.h>
#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 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.
#include "print.h"
+#include "fptype.h"
+
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
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
static int Qflag = -1; /* restrict captured packet by send/receive direction */
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;
static void (*setsignal (int sig, void (*func)(int)))(int);
static void cleanup(int);
static void child_cleanup(int);
-static void print_version(void);
-static void print_usage(void);
+static void print_version(FILE *);
+static void print_usage(FILE *);
#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
static NORETURN void show_tstamp_types_and_exit(pcap_t *, const char *device);
#endif
#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)
{ "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 },
* 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
+ * 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
*/
*ebuf = '\0';
pc = pcap_open(device, ndo->ndo_snaplen,
- pflag ? 0 : PCAP_OPENFLAG_PROMISCUOUS, 1000, NULL,
+ pflag ? 0 : PCAP_OPENFLAG_PROMISCUOUS, timeout, NULL,
ebuf);
if (pc == NULL) {
/*
error("%s: Can't set monitor mode: %s",
device, pcap_statustostr(status));
}
- status = pcap_set_timeout(pc, 1000);
+ status = pcap_set_timeout(pc, timeout);
if (status != 0)
error("%s: pcap_set_timeout failed: %s",
device, pcap_statustostr(status));
*/
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s: %s\n(%s)",
device, pcap_statustostr(status), cp);
- pcap_close(pc);
- return (NULL);
} else if (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));
+ pcap_close(pc);
+ return (NULL);
} else if (status > 0) {
/*
* pcap_activate() succeeded, but it's warning us
*/
if (ndo->ndo_snaplen == 0)
ndo->ndo_snaplen = MAXIMUM_SNAPLEN;
- pc = pcap_open_live(device, ndo->ndo_snaplen, !pflag, 1000, ebuf);
+ pc = pcap_open_live(device, ndo->ndo_snaplen, !pflag, timeout, ebuf);
if (pc == NULL) {
/*
* If this failed with "No such device", that means
VFile = NULL;
WFileName = NULL;
dlt = -1;
- if ((cp = strrchr(argv[0], '/')) != NULL)
+ if ((cp = strrchr(argv[0], PATH_SEPARATOR)) != NULL)
ndo->program_name = program_name = cp + 1;
else
ndo->program_name = program_name = argv[0];
break;
case 'h':
- print_usage();
+ print_usage(stdout);
exit_tcpdump(S_SUCCESS);
break;
setvbuf(stdout, NULL, _IOLBF, 0);
#endif
#endif /* _WIN32 */
+ lflag = 1;
break;
case 'K':
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
error("unknown packet type `%s'", optarg);
break;
break;
case OPTION_VERSION:
- print_version();
+ print_version(stdout);
exit_tcpdump(S_SUCCESS);
break;
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:
- print_usage();
+ print_usage(stderr);
exit_tcpdump(S_ERR_HOST_PROGRAM);
/* NOTREACHED */
}
show_remote_devices_and_exit();
#endif
+#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
+
switch (ndo->ndo_tflag) {
case 0: /* Default */
if (VFileName != NULL && RFileName != NULL)
error("-V and -r are mutually exclusive.");
-#ifdef HAVE_PCAP_SET_IMMEDIATE_MODE
/*
- * If we're printing dissected packets to the standard output
- * and the standard output is a terminal, use immediate mode,
- * as the user's probably expecting to see packets pop up
- * immediately.
+ * 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 - set the timeout to a lower value, instead? If so,
- * what value would be appropriate?
+ * 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))
- immediate_mode = 1;
-#endif
+ if ((WFileName == NULL || print) && (isatty(1) || lflag))
+ timeout = 100;
#ifdef WITH_CHROOT
/* if run as root, prepare for chrooting */
}
#endif
(void)fprintf(stderr, "%s: data link type %s\n",
- program_name, yflag_dlt_name);
+ program_name,
+ pcap_datalink_val_to_name(yflag_dlt));
(void)fflush(stderr);
}
i = pcap_snapshot(pd);
}
if (print) {
dlt = pcap_datalink(pd);
- ndo->ndo_if_printer = get_if_printer(ndo, dlt);
+ ndo->ndo_if_printer = get_if_printer(dlt);
dumpinfo.ndo = ndo;
} else
dumpinfo.ndo = NULL;
#endif
} else {
dlt = pcap_datalink(pd);
- ndo->ndo_if_printer = get_if_printer(ndo, dlt);
+ ndo->ndo_if_printer = get_if_printer(dlt);
callback = print_packet;
pcap_userdata = (u_char *)ndo;
}
(void)setsignal(SIGNAL_FLUSH_PCAP, flushpcap);
#endif
- if (ndo->ndo_vflag > 0 && WFileName && !print) {
+ 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
/*
*/
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);
* the new DLT.
*/
dlt = new_dlt;
- ndo->ndo_if_printer = get_if_printer(ndo, dlt);
+ ndo->ndo_if_printer = get_if_printer(dlt);
if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
error("%s", pcap_geterr(pd));
}
}
while (ret != NULL);
+ if (count_mode && RFileName != NULL)
+ fprintf(stderr, "%u packet%s\n", packets_captured,
+ PLURAL_SUFFIX(packets_captured));
+
free(cmdbuf);
pcap_freecode(&fcode);
exit_tcpdump(status == -1 ? 1 : 0);
++infodelay;
- pretty_print_packet((netdissect_options *)user, h, sp, packets_captured);
+ if (!count_mode)
+ pretty_print_packet((netdissect_options *)user, h, sp, packets_captured);
--infodelay;
if (infoprint)
USES_APPLE_DEPRECATED_API
static void
-print_version(void)
+print_version(FILE *f)
{
#ifndef HAVE_PCAP_LIB_VERSION
#ifdef HAVE_PCAP_VERSION
#endif /* HAVE_PCAP_LIB_VERSION */
const char *smi_version_string;
- (void)fprintf(stderr, "%s version " PACKAGE_VERSION "\n", program_name);
+ (void)fprintf(f, "%s version " PACKAGE_VERSION "\n", program_name);
#ifdef HAVE_PCAP_LIB_VERSION
- (void)fprintf(stderr, "%s\n", pcap_lib_version());
+ (void)fprintf(f, "%s\n", pcap_lib_version());
#else /* HAVE_PCAP_LIB_VERSION */
- (void)fprintf(stderr, "libpcap version %s\n", pcap_version);
+ (void)fprintf(f, "libpcap version %s\n", pcap_version);
#endif /* HAVE_PCAP_LIB_VERSION */
#if defined(HAVE_LIBCRYPTO) && defined(SSLEAY_VERSION)
- (void)fprintf (stderr, "%s\n", SSLeay_version(SSLEAY_VERSION));
+ (void)fprintf (f, "%s\n", SSLeay_version(SSLEAY_VERSION));
#endif
smi_version_string = nd_smi_version_string();
if (smi_version_string != NULL)
- (void)fprintf (stderr, "SMI-library: %s\n", smi_version_string);
+ (void)fprintf (f, "SMI-library: %s\n", smi_version_string);
#if defined(__SANITIZE_ADDRESS__)
- (void)fprintf (stderr, "Compiled with AddressSanitizer/GCC.\n");
+ (void)fprintf (f, "Compiled with AddressSanitizer/GCC.\n");
#elif defined(__has_feature)
# if __has_feature(address_sanitizer)
- (void)fprintf (stderr, "Compiled with AddressSanitizer/CLang.\n");
+ (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 */
}
USES_APPLE_RST
static void
-print_usage(void)
+print_usage(FILE *f)
{
- print_version();
- (void)fprintf(stderr,
-"Usage: %s [-aAbd" D_FLAG "efhH" I_FLAG J_FLAG "KlLnNOpqStu" U_FLAG "vxX#]" B_FLAG_USAGE " [ -c count ]\n", program_name);
- (void)fprintf(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(stderr,
+ (void)fprintf(f,
"\t\t[ -i interface ]" IMMEDIATE_MODE_USAGE j_FLAG_USAGE "\n");
#ifdef HAVE_PCAP_FINDALLDEVS_EX
- (void)fprintf(stderr,
+ (void)fprintf(f,
"\t\t" LIST_REMOTE_INTERFACES_USAGE "\n");
#endif
#ifdef USE_LIBSMI
- (void)fprintf(stderr,
+ (void)fprintf(f,
"\t\t" m_FLAG_USAGE "\n");
#endif
- (void)fprintf(stderr,
+ (void)fprintf(f,
"\t\t[ -M secret ] [ --number ] [ --print ]" Q_FLAG_USAGE "\n");
- (void)fprintf(stderr,
+ (void)fprintf(f,
"\t\t[ -r file ] [ -s snaplen ] [ -T type ] [ --version ]\n");
- (void)fprintf(stderr,
+ (void)fprintf(f,
"\t\t[ -V file ] [ -w file ] [ -W filecount ] [ -y datalinktype ]\n");
#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
- (void)fprintf(stderr,
+ (void)fprintf(f,
"\t\t[ --time-stamp-precision precision ] [ --micro ] [ --nano ]\n");
#endif
- (void)fprintf(stderr,
+ (void)fprintf(f,
"\t\t[ -z postrotate-command ] [ -Z user ] [ expression ]\n");
}
projects / tcpdump / blobdiff