Virgin import of unmodified tcpdump v3.2.1 distribution from LBL.

Obtained from: ftp://ftp.ee.lbl.gov/tcpdump.tar.Z on 19-Aug-1996.

1 files changed, 337 insertions, 0 deletions

diff --git a/contrib/tcpdump/util.c b/contrib/tcpdump/util.c
new file mode 100644
index 0000000..9c74a3a
--- /dev/null
+++ b/contrib/tcpdump/util.c
@@ -0,0 +1,337 @@
+/*
+ * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+static char rcsid[] =
+    "@(#) $Header: util.c,v 1.52 96/07/15 18:22:54 leres Exp $ (LBL)";
+#endif
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <errno.h>
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <pcap.h>
+#include <stdio.h>
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+#ifdef TIME_WITH_SYS_TIME
+#include <time.h>
+#endif
+#include <unistd.h>
+
+#include "interface.h"
+
+/*
+ * Print out a filename (or other ascii string).
+ * If ep is NULL, assume no truncation check is needed.
+ * Return true if truncated.
+ */
+int
+fn_print(register const u_char *s, register const u_char *ep)
+{
+	register int ret;
+	register u_char c;
+
+	ret = 1;			/* assume truncated */
+	while (ep == NULL || s < ep) {
+		c = *s++;
+		if (c == '\0') {
+			ret = 0;
+			break;
+		}
+		if (!isascii(c)) {
+			c = toascii(c);
+			putchar('M');
+			putchar('-');
+		}
+		if (!isprint(c)) {
+			c ^= 0x40;	/* DEL to ?, others to alpha */
+			putchar('^');
+		}
+		putchar(c);
+	}
+	return(ret);
+}
+
+/*
+ * Print out a counted filename (or other ascii string).
+ * If ep is NULL, assume no truncation check is needed.
+ * Return true if truncated.
+ */
+int
+fn_printn(register const u_char *s, register u_int n,
+	  register const u_char *ep)
+{
+	register int ret;
+	register u_char c;
+
+	ret = 1;			/* assume truncated */
+	while (ep == NULL || s < ep) {
+		if (n-- <= 0) {
+			ret = 0;
+			break;
+		}
+		c = *s++;
+		if (!isascii(c)) {
+			c = toascii(c);
+			putchar('M');
+			putchar('-');
+		}
+		if (!isprint(c)) {
+			c ^= 0x40;	/* DEL to ?, others to alpha */
+			putchar('^');
+		}
+		putchar(c);
+	}
+	return(ret);
+}
+
+/*
+ * Print the timestamp
+ */
+void
+ts_print(register const struct timeval *tvp)
+{
+	register int s;
+
+	if (tflag > 0) {
+		/* Default */
+		s = (tvp->tv_sec + thiszone) % 86400;
+		(void)printf("%02d:%02d:%02d.%06u ",
+		    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
+	} else if (tflag < 0) {
+		/* Unix timeval style */
+		(void)printf("%u.%06u ",
+		    (u_int32_t)tvp->tv_sec, (u_int32_t)tvp->tv_usec);
+	}
+}
+
+/*
+ * Convert a token value to a string; use "fmt" if not found.
+ */
+const char *
+tok2str(register const struct tok *lp, register const char *fmt,
+	register int v)
+{
+	static char buf[128];
+
+	while (lp->s != NULL) {
+		if (lp->v == v)
+			return (lp->s);
+		++lp;
+	}
+	if (fmt == NULL)
+		fmt = "#%d";
+	(void)sprintf(buf, fmt, v);
+	return (buf);
+}
+
+
+/* VARARGS */
+__dead void
+#if __STDC__
+error(const char *fmt, ...)
+#else
+error(fmt, va_alist)
+	const char *fmt;
+	va_dcl
+#endif
+{
+	va_list ap;
+
+	(void)fprintf(stderr, "%s: ", program_name);
+#if __STDC__
+	va_start(ap, fmt);
+#else
+	va_start(ap);
+#endif
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	if (*fmt) {
+		fmt += strlen(fmt);
+		if (fmt[-1] != '\n')
+			(void)fputc('\n', stderr);
+	}
+	exit(1);
+	/* NOTREACHED */
+}
+
+/* VARARGS */
+void
+#if __STDC__
+warning(const char *fmt, ...)
+#else
+warning(fmt, va_alist)
+	const char *fmt;
+	va_dcl
+#endif
+{
+	va_list ap;
+
+	(void)fprintf(stderr, "%s: WARNING: ", program_name);
+#if __STDC__
+	va_start(ap, fmt);
+#else
+	va_start(ap);
+#endif
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	if (*fmt) {
+		fmt += strlen(fmt);
+		if (fmt[-1] != '\n')
+			(void)fputc('\n', stderr);
+	}
+}
+
+/*
+ * Copy arg vector into a new buffer, concatenating arguments with spaces.
+ */
+char *
+copy_argv(register char **argv)
+{
+	register char **p;
+	register u_int len = 0;
+	char *buf;
+	char *src, *dst;
+
+	p = argv;
+	if (*p == 0)
+		return 0;
+
+	while (*p)
+		len += strlen(*p++) + 1;
+
+	buf = (char *)malloc(len);
+	if (buf == NULL)
+		error("copy_argv: malloc");
+
+	p = argv;
+	dst = buf;
+	while ((src = *p++) != NULL) {
+		while ((*dst++ = *src++) != '\0')
+			;
+		dst[-1] = ' ';
+	}
+	dst[-1] = '\0';
+
+	return buf;
+}
+
+/* A replacement for strdup() that cuts down on malloc() overhead */
+char *
+savestr(register const char *str)
+{
+	register u_int size;
+	register char *p;
+	static char *strptr = NULL;
+	static u_int strsize = 0;
+
+	size = strlen(str) + 1;
+	if (size > strsize) {
+		strsize = 1024;
+		if (strsize < size)
+			strsize = size;
+		strptr = (char *)malloc(strsize);
+		if (strptr == NULL)
+			error("savestr: malloc");
+	}
+	(void)strcpy(strptr, str);
+	p = strptr;
+	strptr += size;
+	strsize -= size;
+	return (p);
+}
+
+char *
+read_infile(char *fname)
+{
+	register int fd, cc;
+	register char *cp;
+	struct stat buf;
+
+	fd = open(fname, O_RDONLY);
+	if (fd < 0)
+		error("can't open %s: %s", fname, pcap_strerror(errno));
+
+	if (fstat(fd, &buf) < 0)
+		error("can't stat %s: %s", fname, pcap_strerror(errno));
+
+	cp = malloc((u_int)buf.st_size + 1);
+	cc = read(fd, cp, (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, cc, (int)buf.st_size);
+	cp[(int)buf.st_size] = '\0';
+
+	return (cp);
+}
+
+int32_t
+gmt2local()
+{
+	register int t;
+#if !defined(HAVE_ALTZONE) && !defined(HAVE_TIMEZONE)
+	struct timeval tv;
+	struct timezone tz;
+	register struct tm *tm;
+#endif
+
+	t = 0;
+#if !defined(HAVE_ALTZONE) && !defined(HAVE_TIMEZONE)
+	if (gettimeofday(&tv, &tz) < 0)
+		error("gettimeofday");
+	tm = localtime((time_t *)&tv.tv_sec);
+#ifdef HAVE_TM_GMTOFF
+	t = tm->tm_gmtoff;
+#else
+	t = tz.tz_minuteswest * -60;
+	/* XXX Some systems need this, some auto offset tz_minuteswest... */
+	if (tm->tm_isdst)
+		t += 60 * 60;
+#endif
+#endif
+
+#ifdef HAVE_TIMEZONE
+	tzset();
+	t = -timezone;
+	if (daylight)
+		t += 60 * 60;
+#endif
+
+#ifdef HAVE_ALTZONE
+	tzset();
+	t = -altzone;
+#endif
+
+	return (t);
+}