*/
#include <config.h>
+#ifndef TCPDUMP_CONFIG_H_
+#error "The included config.h header is not from the tcpdump build."
+#endif
#include "netdissect-stdinc.h"
#include <sys/sysctl.h>
#endif /* __FreeBSD__ */
-#include "netdissect-stdinc.h"
#include "netdissect.h"
#include "interface.h"
#include "addrtoname.h"
-#include "pcap-missing.h"
#include "ascii_strcasecmp.h"
#include "print.h"
static int Uflag; /* "unbuffered" output of dump files */
static int Wflag; /* recycle output files after this number of files */
static int WflagChars;
+#if defined(HAVE_FORK) || defined(HAVE_VFORK)
static char *zflag = NULL; /* compress each savefile using a specified command (like gzip or bzip2) */
+#endif
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 u_int packets_skipped;
+static u_int packets_to_skip;
static int infodelay;
static int infoprint;
char **endp, int64_t minval, int64_t maxval, int base);
static void (*setsignal (int sig, void (*func)(int)))(int);
static void cleanup(int);
+#if defined(HAVE_FORK) || defined(HAVE_VFORK)
static void child_cleanup(int);
+#endif
static void print_version(FILE *);
static void print_usage(FILE *);
#define m_FLAG_USAGE "[ -m module ] ..."
#endif
-#define SHORTOPTS "aAbB:c:C:dDeE:fF:G:hHi:I" j_FLAG J_FLAG "KlLm:M:nNOpqQ:r:s:StT:uUvV:w:W:xXy:Yz:Z:#"
+#if defined(HAVE_FORK) || defined(HAVE_VFORK)
+#define z_FLAG "z:"
+#define z_FLAG_USAGE "[ -z postrotate-command ] "
+#else
+#define z_FLAG
+#define z_FLAG_USAGE
+#endif
+
+#ifdef HAVE_LIBCRYPTO
+#define E_FLAG "E:"
+#define E_FLAG_USAGE "[ -E algo:secret ] "
+#define M_FLAG "M:"
+#define M_FLAG_USAGE "[ -M secret ] "
+#else
+#define E_FLAG
+#define E_FLAG_USAGE
+#define M_FLAG
+#define M_FLAG_USAGE
+#endif
+
+#define SHORTOPTS "aAbB:c:C:dDe" E_FLAG "fF:G:hHi:I" j_FLAG J_FLAG "KlLm:" M_FLAG "nNOpqQ:r:s:StT:uUvV:w:W:xXy:Y" z_FLAG "Z:#"
/*
* Long options.
{
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);
+ error("capng_change_id(): return %d", ret);
else
fprintf(stderr, "dropped privs to %s\n", username);
}
} else if (status == PCAP_ERROR_PERM_DENIED && *cp != '\0')
error("%s: %s\n(%s)", device,
pcap_statustostr(status), cp);
+#ifdef PCAP_ERROR_CAPTURE_NOTSUP
+ else if (status == PCAP_ERROR_CAPTURE_NOTSUP && *cp != '\0')
+ error("%s: %s\n(%s)", device,
+ pcap_statustostr(status), cp);
+#endif
#ifdef __FreeBSD__
else if (status == PCAP_ERROR_RFMON_NOTSUP &&
strncmp(device, "wlan", 4) == 0) {
* 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"
+ error("%s is not a monitor mode VAP"
"To create a new monitor mode VAP use:\n"
" ifconfig %s create wlandev %s wlanmode monitor\n"
"and use %s as the tcpdump interface",
++ndo->ndo_eflag;
break;
+#ifdef HAVE_LIBCRYPTO
case 'E':
-#ifndef HAVE_LIBCRYPTO
- warning("crypto code not compiled in");
-#endif
ndo->ndo_espsecret = optarg;
break;
+#endif
case 'f':
++ndo->ndo_fflag;
}
break;
+#ifdef HAVE_LIBCRYPTO
case 'M':
/* TCP-MD5 shared secret */
-#ifndef HAVE_LIBCRYPTO
- warning("crypto code not compiled in");
-#endif
ndo->ndo_sigsecret = optarg;
break;
+#endif
case 'n':
++ndo->ndo_nflag;
}
break;
#endif
+
+#if defined(HAVE_FORK) || defined(HAVE_VFORK)
case 'z':
zflag = optarg;
break;
+#endif
case 'Z':
username = optarg;
break;
case OPTION_SKIP:
- packets_skipped = parse_u_int("packet skip count",
- optarg, NULL, 1, UINT_MAX, 0);
+ packets_to_skip = parse_u_int("packet skip count",
+ optarg, NULL, 0, INT_MAX, 0);
break;
#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
}
if (ndo->ndo_Aflag && ndo->ndo_xflag)
- warning("-A and -x[x] are mutually exclusive. -A ignored.");
+ error("-A and -x[x] are mutually exclusive.");
if (ndo->ndo_Aflag && ndo->ndo_Xflag)
- warning("-A and -X[X] are mutually exclusive. -A ignored.");
+ error("-A and -X[X] are mutually exclusive.");
if (ndo->ndo_xflag && ndo->ndo_Xflag)
- warning("-x[x] and -X[X] are mutually exclusive. -x[x] ignored.");
+ error("-x[x] and -X[X] are mutually exclusive.");
+ if (Cflag != 0 && WFileName == NULL)
+ error("-C cannot be used without -w.");
+ if (Gflag != 0 && WFileName == NULL)
+ error("-G cannot be used without -w.");
+#if defined(HAVE_FORK) || defined(HAVE_VFORK)
+ if (zflag != NULL && (WFileName == NULL || (Cflag == 0 && Gflag == 0)))
+ error("-z cannot be used without -w and (-C or -G).");
+#endif
+
+ if (cnt != -1)
+ if ((int)packets_to_skip > (INT_MAX - cnt))
+ // cnt + (int)packets_to_skip used in pcap_loop() call
+ error("Overflow (-c count) %d + (--skip count) %d", cnt,
+ (int)packets_to_skip);
if (Dflag)
show_devices_and_exit();
}
if (ndo->ndo_fflag != 0 && (VFileName != NULL || RFileName != NULL))
- error("-f can not be used with -V or -r");
+ error("-f cannot be used with -V or -r.");
if (VFileName != NULL && RFileName != NULL)
error("-V and -r are mutually exclusive.");
VFile = fopen(VFileName, "r");
if (VFile == NULL)
- error("Unable to open file: %s\n", pcap_strerror(errno));
+ error("Unable to open file: %s", pcap_strerror(errno));
ret = get_next_file(VFile, VFileLine);
if (!ret)
- error("Nothing in %s\n", VFileName);
+ error("Nothing in %s", VFileName);
RFileName = VFileLine;
}
#ifdef HAVE_PCAP_SET_OPTIMIZER_DEBUG
pcap_set_optimizer_debug(dflag);
#endif
- if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
+ /*
+ * netmask is in network byte order, pcap_compile() takes it
+ * in host byte order.
+ */
+ if (pcap_compile(pd, &fcode, cmdbuf, Oflag, ntohl(netmask)) < 0)
error("%s", pcap_geterr(pd));
if (dflag) {
bpf_dump(&fcode, dflag);
capdns = capdns_setup();
#endif /* HAVE_CASPER */
+ // Both localnet and netmask are in network byte order.
init_print(ndo, localnet, netmask);
#ifndef _WIN32
do {
status = pcap_loop(pd,
- cnt + (cnt == -1 ? 0 : packets_skipped),
+ (cnt == -1 ? -1 : cnt + (int)packets_to_skip),
callback, pcap_userdata);
if (WFileName == NULL) {
/*
ndo->ndo_if_printer = get_if_printer(dlt);
/* Free the old filter */
pcap_freecode(&fcode);
- if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
+ /*
+ * netmask is in network byte order, pcap_compile() takes it
+ * in host byte order.
+ */
+ if (pcap_compile(pd, &fcode, cmdbuf, Oflag, ntohl(netmask)) < 0)
error("%s", pcap_geterr(pd));
}
child = fork_subprocess();
if (child == -1) {
fprintf(stderr,
- "compress_savefile: fork failed: %s\n",
- pcap_strerror(errno));
+ "%s: fork failed: %s\n",
+ __func__, pcap_strerror(errno));
return;
}
if (child != 0) {
#endif
if (execlp(zflag, zflag, filename, (char *)NULL) == -1)
fprintf(stderr,
- "compress_savefile: execlp(%s, %s) failed: %s\n",
- zflag,
- filename,
- pcap_strerror(errno));
+ "%s: execlp(%s, %s) failed: %s\n",
+ __func__, zflag, filename, 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
-compress_savefile(const char *filename)
-{
- fprintf(stderr,
- "compress_savefile failed. Functionality not implemented under your system\n");
-}
-#endif /* HAVE_FORK && HAVE_VFORK */
+#endif /* HAVE_FORK || HAVE_VFORK */
static void
close_old_dump_file(struct dump_info *dump_info)
*/
pcap_dump_close(dump_info->pdd);
+#if defined(HAVE_FORK) || defined(HAVE_VFORK)
/*
* Compress the file we just closed, if the user asked for it.
*/
if (zflag != NULL)
compress_savefile(dump_info->CurrentFileName);
+#endif
}
static void
dump_info = (struct dump_info *)user;
- if (packets_captured <= packets_skipped)
+ if (packets_captured <= packets_to_skip)
return;
/*
dump_info = (struct dump_info *)user;
- if (packets_captured <= packets_skipped)
+ if (packets_captured <= packets_to_skip)
return;
pcap_dump((u_char *)dump_info->pdd, h, sp);
++infodelay;
- if (!count_mode && packets_captured > packets_skipped)
+ if (!count_mode && packets_captured > packets_to_skip)
pretty_print_packet((netdissect_options *)user, h, sp, packets_captured);
--infodelay;
(void)fprintf(f,
"Usage: %s [-AbdDefhHI" J_FLAG "KlLnNOpqStuUvxX#] [ -B size ] [ -c count ] [--count]\n", program_name);
(void)fprintf(f,
-"\t\t[ -C file_size ] [ -E algo:secret ] [ -F file ] [ -G seconds ]\n");
+"\t\t[ -C file_size ] " E_FLAG_USAGE "[ -F file ] [ -G seconds ]\n");
(void)fprintf(f,
"\t\t[ -i interface ]" IMMEDIATE_MODE_USAGE j_FLAG_USAGE "\n");
(void)fprintf(f,
"\t\t" m_FLAG_USAGE "\n");
#endif
(void)fprintf(f,
-"\t\t[ -M secret ] [ --number ] [ --print ]\n");
+"\t\t" M_FLAG_USAGE "[ --number ] [ --print ]\n");
(void)fprintf(f,
"\t\t[ --print-sampling nth ] [ -Q in|out|inout ] [ -r file ]\n");
(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");
+"\t\t" z_FLAG_USAGE "[ -Z user ] [ expression ]\n");
}
projects / tcpdump / blobdiff