459 lines
10 KiB
C
459 lines
10 KiB
C
/*
|
|
* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
|
|
* 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 const char rcsid[] _U_ =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/util.c,v 1.87.2.3 2003/12/29 22:42:23 hannes Exp $ (LBL)";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <sys/stat.h>
|
|
|
|
#include <errno.h>
|
|
#ifdef HAVE_FCNTL_H
|
|
#include <fcntl.h>
|
|
#endif
|
|
#include <pcap.h>
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <string.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 u_char c;
|
|
|
|
while (n > 0 && (ep == NULL || s < ep)) {
|
|
n--;
|
|
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 (n == 0) ? 0 : 1;
|
|
}
|
|
|
|
/*
|
|
* Print the timestamp
|
|
*/
|
|
void
|
|
ts_print(register const struct timeval *tvp)
|
|
{
|
|
register int s;
|
|
struct tm *tm;
|
|
time_t Time;
|
|
static unsigned b_sec;
|
|
static unsigned b_usec;
|
|
|
|
switch(tflag) {
|
|
case 1: /* Default */
|
|
s = (tvp->tv_sec + thiszone) % 86400;
|
|
(void)printf("%02d:%02d:%02d.%06u ",
|
|
s / 3600, (s % 3600) / 60, s % 60,
|
|
(unsigned)tvp->tv_usec);
|
|
break;
|
|
case -1: /* Unix timeval style */
|
|
(void)printf("%u.%06u ",
|
|
(unsigned)tvp->tv_sec,
|
|
(unsigned)tvp->tv_usec);
|
|
break;
|
|
case -2:
|
|
if (b_sec == 0) {
|
|
printf("000000 ");
|
|
} else {
|
|
int d_usec = tvp->tv_usec - b_usec;
|
|
int d_sec = tvp->tv_sec - b_sec;
|
|
|
|
while (d_usec < 0) {
|
|
d_usec += 1000000;
|
|
d_sec--;
|
|
}
|
|
if (d_sec)
|
|
printf("%d. ", d_sec);
|
|
printf("%06d ", d_usec);
|
|
}
|
|
b_sec = tvp->tv_sec;
|
|
b_usec = tvp->tv_usec;
|
|
break;
|
|
case -3: /* Default + Date*/
|
|
s = (tvp->tv_sec + thiszone) % 86400;
|
|
Time = (tvp->tv_sec + thiszone) - s;
|
|
tm = gmtime (&Time);
|
|
if (!tm)
|
|
printf("Date fail ");
|
|
else
|
|
printf("%04d-%02d-%02d ",
|
|
tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday);
|
|
printf("%02d:%02d:%02d.%06u ",
|
|
s / 3600, (s % 3600) / 60, s % 60, (unsigned)tvp->tv_usec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print a relative number of seconds (e.g. hold time, prune timer)
|
|
* in the form 5m1s. This does no truncation, so 32230861 seconds
|
|
* is represented as 1y1w1d1h1m1s.
|
|
*/
|
|
void
|
|
relts_print(int secs)
|
|
{
|
|
static const char *lengths[] = {"y", "w", "d", "h", "m", "s"};
|
|
static const int seconds[] = {31536000, 604800, 86400, 3600, 60, 1};
|
|
const char **l = lengths;
|
|
const int *s = seconds;
|
|
|
|
if (secs == 0) {
|
|
(void)printf("0s");
|
|
return;
|
|
}
|
|
if (secs < 0) {
|
|
(void)printf("-");
|
|
secs = -secs;
|
|
}
|
|
while (secs > 0) {
|
|
if (secs >= *s) {
|
|
(void)printf("%d%s", secs / *s, *l);
|
|
secs -= (secs / *s) * *s;
|
|
}
|
|
s++;
|
|
l++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* this is a generic routine for printing unknown data;
|
|
* we pass on the linefeed plus indentation string to
|
|
* get a proper output - returns 0 on error
|
|
*/
|
|
|
|
int
|
|
print_unknown_data(const u_char *cp,const char *ident,int len)
|
|
{
|
|
hex_print(ident,cp,len);
|
|
return(1); /* everything is ok */
|
|
}
|
|
|
|
/*
|
|
* 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)snprintf(buf, sizeof(buf), fmt, v);
|
|
return (buf);
|
|
}
|
|
|
|
/*
|
|
* Convert a bit token value to a string; use "fmt" if not found.
|
|
* this is useful for parsing bitfields, the output strings are comma seperated
|
|
*/
|
|
char *
|
|
bittok2str(register const struct tok *lp, register const char *fmt,
|
|
register int v)
|
|
{
|
|
static char buf[256]; /* our stringbuffer */
|
|
int buflen=0;
|
|
register int rotbit; /* this is the bit we rotate through all bitpositions */
|
|
register int tokval;
|
|
|
|
while (lp->s != NULL) {
|
|
tokval=lp->v; /* load our first value */
|
|
rotbit=1;
|
|
while (rotbit != 0) {
|
|
/*
|
|
* lets AND the rotating bit with our token value
|
|
* and see if we have got a match
|
|
*/
|
|
if (tokval == (v&rotbit)) {
|
|
/* ok we have found something */
|
|
buflen+=snprintf(buf+buflen, sizeof(buf)-buflen, "%s, ",lp->s);
|
|
break;
|
|
}
|
|
rotbit=rotbit<<1; /* no match - lets shift and try again */
|
|
}
|
|
lp++;
|
|
}
|
|
|
|
if (buflen != 0) { /* did we find anything */
|
|
/* yep, set the the trailing zero 2 bytes before to eliminate the last comma & whitespace */
|
|
buf[buflen-2] = '\0';
|
|
return (buf);
|
|
}
|
|
else {
|
|
/* bummer - lets print the "unknown" message as advised in the fmt string if we got one */
|
|
if (fmt == NULL)
|
|
fmt = "#%d";
|
|
(void)snprintf(buf, sizeof(buf), fmt, v);
|
|
return (buf);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Convert a value to a string using an array; the macro
|
|
* tok2strary() in <interface.h> is the public interface to
|
|
* this function and ensures that the second argument is
|
|
* correct for bounds-checking.
|
|
*/
|
|
const char *
|
|
tok2strary_internal(register const char **lp, int n, register const char *fmt,
|
|
register int v)
|
|
{
|
|
static char buf[128];
|
|
|
|
if (v >= 0 && v < n && lp[v] != NULL)
|
|
return lp[v];
|
|
if (fmt == NULL)
|
|
fmt = "#%d";
|
|
(void)snprintf(buf, sizeof(buf), fmt, v);
|
|
return (buf);
|
|
}
|
|
|
|
/*
|
|
* Convert a 32-bit netmask to prefixlen if possible
|
|
* the function returns the prefix-len; if plen == -1
|
|
* then conversion was not possible;
|
|
*/
|
|
|
|
int
|
|
mask2plen (u_int32_t mask)
|
|
{
|
|
u_int32_t bitmasks[33] = {
|
|
0x00000000,
|
|
0x80000000, 0xc0000000, 0xe0000000, 0xf0000000,
|
|
0xf8000000, 0xfc000000, 0xfe000000, 0xff000000,
|
|
0xff800000, 0xffc00000, 0xffe00000, 0xfff00000,
|
|
0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000,
|
|
0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000,
|
|
0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00,
|
|
0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0,
|
|
0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff
|
|
};
|
|
int prefix_len = 32;
|
|
|
|
/* let's see if we can transform the mask into a prefixlen */
|
|
while (prefix_len >= 0) {
|
|
if (bitmasks[prefix_len] == mask)
|
|
break;
|
|
prefix_len--;
|
|
}
|
|
return (prefix_len);
|
|
}
|
|
|
|
/* VARARGS */
|
|
void
|
|
error(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
(void)fprintf(stderr, "%s: ", program_name);
|
|
va_start(ap, fmt);
|
|
(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
|
|
warning(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
(void)fprintf(stderr, "%s: WARNING: ", program_name);
|
|
va_start(ap, fmt);
|
|
(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;
|
|
}
|
|
|
|
/*
|
|
* On Windows, we need to open the file in binary mode, so that
|
|
* we get all the bytes specified by the size we get from "fstat()".
|
|
* On UNIX, that's not necessary. O_BINARY is defined on Windows;
|
|
* we define it as 0 if it's not defined, so it does nothing.
|
|
*/
|
|
#ifndef O_BINARY
|
|
#define O_BINARY 0
|
|
#endif
|
|
|
|
char *
|
|
read_infile(char *fname)
|
|
{
|
|
register int i, fd, cc;
|
|
register char *cp;
|
|
struct stat buf;
|
|
|
|
fd = open(fname, O_RDONLY|O_BINARY);
|
|
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);
|
|
if (cp == NULL)
|
|
error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
|
|
fname, pcap_strerror(errno));
|
|
cc = read(fd, cp, (u_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);
|
|
|
|
close(fd);
|
|
/* replace "# comment" with spaces */
|
|
for (i = 0; i < cc; i++) {
|
|
if (cp[i] == '#')
|
|
while (i < cc && cp[i] != '\n')
|
|
cp[i++] = ' ';
|
|
}
|
|
cp[cc] = '\0';
|
|
return (cp);
|
|
}
|
|
|
|
void
|
|
safeputs(const char *s)
|
|
{
|
|
while (*s) {
|
|
safeputchar(*s);
|
|
s++;
|
|
}
|
|
}
|
|
|
|
void
|
|
safeputchar(int c)
|
|
{
|
|
unsigned char ch;
|
|
|
|
ch = (unsigned char)(c & 0xff);
|
|
if (ch < 0x80 && isprint(ch))
|
|
printf("%c", ch);
|
|
else
|
|
printf("\\%03o", ch);
|
|
}
|