X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/0f24a43a7e9fbdcff2baae3990939b2bc25d9fd1..40f1cf8aa72185cce0994aaaf8b14d524e5a4d8b:/tcpdump.c?ds=inline

diff --git a/tcpdump.c b/tcpdump.c
index 1ed33461..ba154278 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -92,6 +92,19 @@ The Regents of the University of California.  All rights reserved.\n";
 #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>
@@ -179,6 +192,7 @@ static char *remote_interfaces_source;	/* list available devices from this sourc
  * 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 */
@@ -669,6 +683,8 @@ show_remote_devices_and_exit(void)
 #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
 
 static const struct option longopts[] = {
 #if defined(HAVE_PCAP_CREATE) || defined(_WIN32)
@@ -688,6 +704,8 @@ static const struct option longopts[] = {
 	{ "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' },
@@ -728,12 +746,6 @@ static const struct option longopts[] = {
 #define IMMEDIATE_MODE_USAGE ""
 #endif
 
-#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
-#define TIME_STAMP_PRECISION_USAGE " [ --time-stamp-precision precision ]"
-#else
-#define TIME_STAMP_PRECISION_USAGE
-#endif
-
 #ifndef _WIN32
 /* Drop root privileges and chroot if necessary */
 static void
@@ -1029,7 +1041,8 @@ copy_argv(char **argv)
 static char *
 read_infile(char *fname)
 {
-	int i, fd, cc;
+	int i, fd;
+	ssize_t cc;
 	char *cp;
 	struct stat buf;
 
@@ -1048,7 +1061,7 @@ read_infile(char *fname)
 	if (cc < 0)
 		error("read %s: %s", fname, pcap_strerror(errno));
 	if (cc != buf.st_size)
-		error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
+		error("short read %s (%zd != %d)", fname, cc, (int)buf.st_size);
 
 	close(fd);
 	/* replace "# comment" with spaces */
@@ -1434,7 +1447,7 @@ main(int argc, char **argv)
 	char ebuf[PCAP_ERRBUF_SIZE];
 	char VFileLine[PATH_MAX + 1];
 	char *username = NULL;
-	char *chroot_dir = NULL;
+	const char *chroot_dir = NULL;
 	char *ret = NULL;
 	char *end;
 #ifdef HAVE_PCAP_FINDALLDEVS
@@ -1715,7 +1728,7 @@ main(int argc, char **argv)
 			break;
 
 		case 's':
-			ndo->ndo_snaplen = strtol(optarg, &end, 0);
+			ndo->ndo_snaplen = (int)strtol(optarg, &end, 0);
 			if (optarg == end || *end != '\0'
 			    || ndo->ndo_snaplen < 0 || ndo->ndo_snaplen > MAXIMUM_SNAPLEN)
 				error("invalid snaplen %s (must be >= 0 and <= %d)",
@@ -1859,6 +1872,16 @@ main(int argc, char **argv)
 			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
+
 		default:
 			print_usage();
 			exit_tcpdump(S_ERR_HOST_PROGRAM);
@@ -3073,11 +3096,13 @@ print_usage(void)
 	(void)fprintf(stderr,
 "\t\t[ -M secret ] [ --number ] [ --print ]" Q_FLAG_USAGE "\n");
 	(void)fprintf(stderr,
-"\t\t[ -r file ] [ -s snaplen ]" TIME_STAMP_PRECISION_USAGE "\n");
+"\t\t[ -r file ] [ -s snaplen ] [ -T type ] [ --version ]\n");
 	(void)fprintf(stderr,
-"\t\t[ -T type ] [ --version ] [ -V file ] [ -w file ]\n");
+"\t\t[ -V file ] [ -w file ] [ -W filecount ] [ -y datalinktype ]\n");
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
 	(void)fprintf(stderr,
-"\t\t[ -W filecount ] [ -y datalinktype ]\n");
+"\t\t[ --time-stamp-precision precision ] [ --micro ] [ --nano ]\n");
+#endif
 	(void)fprintf(stderr,
 "\t\t[ -z postrotate-command ] [ -Z user ] [ expression ]\n");
 }