/*
* 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);
}
