"@(#) 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";
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.199 2003-01-08 04:33:27 guy Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.216 2003-11-04 07:29:16 guy Exp $ (LBL)";
#endif
/*
#include "gmt2local.h"
#include "pcap-missing.h"
-int aflag; /* translate network and broadcast addresses */
int dflag; /* print filter code */
int eflag; /* print ethernet header */
int fflag; /* don't translate "foreign" IP address */
#endif
static void info(int);
+static u_int packets_captured;
/* Length of saved portion of packet. */
int snaplen = DEFAULT_SNAPLEN;
static struct printer printers[] = {
{ arcnet_if_print, DLT_ARCNET },
+#ifdef DLT_ARCNET_LINUX
+ { arcnet_linux_if_print, DLT_ARCNET_LINUX },
+#endif
{ ether_if_print, DLT_EN10MB },
{ token_if_print, DLT_IEEE802 },
#ifdef DLT_LANE8023
{ cip_if_print, DLT_ATM_CLIP },
#endif
{ sl_if_print, DLT_SLIP },
+#ifdef DLT_SLIP_BSDOS
{ sl_bsdos_if_print, DLT_SLIP_BSDOS },
+#endif
{ ppp_if_print, DLT_PPP },
+#ifdef DLT_PPP_BSDOS
{ ppp_bsdos_if_print, DLT_PPP_BSDOS },
+#endif
{ fddi_if_print, DLT_FDDI },
{ null_if_print, DLT_NULL },
#ifdef DLT_LOOP
#endif
#ifdef DLT_IEEE802_11_RADIO
{ ieee802_11_radio_if_print, DLT_IEEE802_11_RADIO },
+#endif
+#ifdef DLT_ENC
+ { enc_if_print, DLT_ENC },
#endif
{ NULL, 0 },
};
pcap_if_t *devpointer;
int devnum;
#endif
+ int status;
#ifdef WIN32
- DWORD dwVersion;
- DWORD dwWindowsMajorVersion;
- u_int UserBufferSize=1000000;
-#endif
-
-#ifdef WIN32
- dwVersion=GetVersion(); /* get the OS version */
- dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
- if(wsockinit()!=0) return 1;
+ u_int UserBufferSize = 1000000;
+ if(wsockinit() != 0) return 1;
#endif /* WIN32 */
cnt = -1;
switch (op) {
case 'a':
- ++aflag;
+ /* compatibility for old -a */
break;
case 'A':
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
error("unknown packet type `%s'", optarg);
break;
/* NOTREACHED */
}
- if (aflag && nflag)
- error("-a and -n options are incompatible");
-
if (tflag > 0)
thiszone = gmt2local(0);
if (RFileName != NULL) {
+ int dlt;
+ const char *dlt_name;
+
+#ifndef WIN32
/*
- * We don't need network access, so set it back to the user id.
- * Also, this prevents the user from reading anyone's
- * trace file.
+ * We don't need network access, so relinquish any set-UID
+ * or set-GID privileges we have (if any).
+ *
+ * We do *not* want set-UID privileges when opening a
+ * trace file, as that might let the user read other
+ * people's trace files (especially if we're set-UID
+ * root).
*/
-#ifndef WIN32
setuid(getuid());
#endif /* WIN32 */
-
pd = pcap_open_offline(RFileName, ebuf);
if (pd == NULL)
error("%s", ebuf);
+ dlt = pcap_datalink(pd);
+ dlt_name = pcap_datalink_val_to_name(dlt);
+ if (dlt_name == NULL)
+ dlt_name = "???";
+ printf("reading from file %s, link-type %u (%s)\n",
+ RFileName, dlt, dlt_name);
localnet = 0;
netmask = 0;
if (fflag != 0)
error("%s", ebuf);
}
#ifdef WIN32
- PrintCapBegins(program_name,device);
+ if(IsTextUnicode(device,
+ wcslen((short*)device), // Device always ends with a double \0, so this way to determine its
+ // length should be always valid
+ NULL))
+ {
+ fprintf(stderr, "%s: listening on %ws\n", program_name, device);
+ }
+ else
+ {
+ fprintf(stderr, "%s: listening on %s\n", program_name, device);
+ }
+
+ fflush(stderr);
#endif /* WIN32 */
*ebuf = '\0';
- pd = pcap_open_live(device, snaplen, !pflag, 1000, ebuf);
+ pd = pcap_open_live(device, snaplen, !pflag, 10000, ebuf);
if (pd == NULL)
error("%s", ebuf);
else if (*ebuf)
}
init_addrtoname(localnet, netmask);
+#ifndef WIN32
+ (void)setsignal(SIGPIPE, cleanup);
+#endif /* WIN32 */
(void)setsignal(SIGTERM, cleanup);
(void)setsignal(SIGINT, cleanup);
/* Cooperate with nohup(1) */
#endif
#ifndef WIN32
if (RFileName == NULL) {
+ int dlt;
+ const char *dlt_name;
+
if (!vflag && !WFileName) {
(void)fprintf(stderr,
"%s: verbose output suppressed, use -v or -vv for full protocol decode\n",
program_name);
} else
(void)fprintf(stderr, "%s: ", program_name);
- (void)fprintf(stderr, "listening on %s, capture size %u bytes\n",
- device, snaplen);
+ dlt = pcap_datalink(pd);
+ dlt_name = pcap_datalink_val_to_name(dlt);
+ if (dlt_name == NULL)
+ dlt_name = "???";
+ (void)fprintf(stderr, "listening on %s, link-type %u (%s), capture size %u bytes\n",
+ device, dlt, dlt_name, snaplen);
(void)fflush(stderr);
}
#endif /* WIN32 */
- if (pcap_loop(pd, cnt, callback, pcap_userdata) < 0) {
+ status = pcap_loop(pd, cnt, callback, pcap_userdata);
+ if (WFileName == NULL) {
+ /*
+ * We're printing packets. Flush the printed output,
+ * so it doesn't get intermingled with error output.
+ */
+ if (status == -2) {
+ /*
+ * We got interrupted, so perhaps we didn't
+ * manage to finish a line we were printing.
+ * Print an extra newline, just in case.
+ */
+ putchar('\n');
+ }
+ (void)fflush(stdout);
+ }
+ if (status == -1) {
+ /*
+ * Error. Report it.
+ */
(void)fprintf(stderr, "%s: pcap_loop: %s\n",
program_name, pcap_geterr(pd));
- cleanup(0);
- pcap_close(pd);
- exit(1);
}
- if (RFileName == NULL)
+ if (RFileName == NULL) {
+ /*
+ * We're doing a live capture. Report the capture
+ * statistics.
+ */
info(1);
+ }
pcap_close(pd);
- exit(0);
+ exit(status == -1 ? 1 : 0);
}
/* make a clean exit on interrupts */
static RETSIGTYPE
-cleanup(int signo)
+cleanup(int signo _U_)
{
-
- /* Can't print the summary if reading from a savefile */
+#ifdef HAVE_PCAP_BREAKLOOP
+ /*
+ * We have "pcap_breakloop()"; use it, so that we do as little
+ * as possible in the signal handler (it's probably not safe
+ * to do anything with standard I/O streams in a signal handler -
+ * the ANSI C standard doesn't say it is).
+ */
+ pcap_breakloop(pd);
+#else
+ /*
+ * We don't have "pcap_breakloop()"; this isn't safe, but
+ * it's the best we can do. Print the summary if we're
+ * not reading from a savefile - i.e., if we're doing a
+ * live capture - and exit.
+ */
if (pd != NULL && pcap_file(pd) == NULL) {
+ /*
+ * We got interrupted, so perhaps we didn't
+ * manage to finish a line we were printing.
+ * Print an extra newline, just in case.
+ */
+ putchar('\n');
(void)fflush(stdout);
- putc('\n', stderr);
info(1);
}
- if (signo)
- exit(0);
+ exit(0);
+#endif
}
static void
if (!verbose)
fprintf(stderr, "%s: ", program_name);
+ (void)fprintf(stderr, "%u packets captured", packets_captured);
+ if (!verbose)
+ fputs(", ", stderr);
+ else
+ putc('\n', stderr);
(void)fprintf(stderr, "%d packets received by filter", stat.ps_recv);
if (!verbose)
fputs(", ", stderr);
static uint cnt = 2;
char *name;
+ ++packets_captured;
+
++infodelay;
dump_info = (struct dump_info *)user;
static void
dump_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
{
+ ++packets_captured;
+
++infodelay;
pcap_dump(user, h, sp);
struct print_info *print_info;
u_int hdrlen;
+ ++packets_captured;
+
++infodelay;
ts_print(&h->ts);
usage(void)
{
extern char version[];
+#ifndef HAVE_PCAP_LIB_VERSION
#if defined(WIN32) || defined(HAVE_PCAP_VERSION)
extern char pcap_version[];
-#else
+#else /* defined(WIN32) || defined(HAVE_PCAP_VERSION) */
static char pcap_version[] = "unknown";
-#endif
+#endif /* defined(WIN32) || defined(HAVE_PCAP_VERSION) */
+#endif /* HAVE_PCAP_LIB_VERSION */
+#ifdef HAVE_PCAP_LIB_VERSION
+ (void)fprintf(stderr, "%s version %s\n", program_name, version);
+ (void)fprintf(stderr, "%s\n", pcap_lib_version());
+#else /* HAVE_PCAP_LIB_VERSION */
#ifdef WIN32
(void)fprintf(stderr, "%s version %s, based on tcpdump version %s\n", program_name, WDversion, version);
(void)fprintf(stderr, "WinPcap version %s, based on libpcap version %s\n",Wpcap_version, pcap_version);
-#else
+#else /* WIN32 */
(void)fprintf(stderr, "%s version %s\n", program_name, version);
(void)fprintf(stderr, "libpcap version %s\n", pcap_version);
#endif /* WIN32 */
+#endif /* HAVE_PCAP_LIB_VERSION */
(void)fprintf(stderr,
-"Usage: %s [-aAd" D_FLAG "eflLnNOpqRStu" U_FLAG "vxXy]" B_FLAG_USAGE " [-c count] [ -C file_size ]\n", program_name);
+"Usage: %s [-aAd" D_FLAG "eflLnNOpqRStu" U_FLAG "vxX]" B_FLAG_USAGE " [-c count] [ -C file_size ]\n", program_name);
(void)fprintf(stderr,
"\t\t[ -E algo:secret ] [ -F file ] [ -i interface ] [ -r file ]\n");
(void)fprintf(stderr,
projects / tcpdump / blobdiff