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