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Import old rinetd 0.61.

Browse Source 
Taken from the Debian archive:
  http://archive.debian.org/debian-security/pool/updates/main/r/rinetd/
This commit is contained in:
Sam Hocevar 2016-01-10 20:50:29 +01:00
parent d46367a44a
commit e6552ce4fa
10 changed files with 1228 additions and 101 deletions

8
CHANGES
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@ -38,3 +38,11 @@ log file before writing log entries.
Version 0.52: documentation added regarding the
ability to bind to all IP addresses, if desired,
using the special address 0.0.0.0.
Version 0.6: ported to Win32. Various compatibility
fixes were made and some minor oversights without
functional consequences were corrected.
Version 0.61: fixed a bug in 0.6 which completely
broke rinetd under Linux. Oops.

19
README
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@ -1,15 +1,22 @@
rinetd version 0.51, by Thomas Boutell. Released under
the terms of the GNU Public License, version 2 or later.
rinetd version 0.61, by Thomas Boutell. Released under
the terms of the GNU General Public License, version 2 or later.
This program is used to efficiently redirect connections
from one IP address/port combination to another. It is
useful when operating virtual servers, firewalls
and the like.
To build, check the Makefile for platform-specific
details and then type make. To install, type
A binary for 32-bit Windows (95, 98, NT) is included (see the
file rinetd.exe). Windows 3.1 is not supported.
To build under Unix, check the Makefile for platform-
specific details and then type make. To install, type
"make install" as root.
For documentation run "make install", then type
"man rinetd" for details.
To build under Windows, use the provided project
files with Microsoft Visual C++. Windows 3.1 is not supported.
For documentation run "make install", then type
"man rinetd" for details. Or, read index.html in
your browser.

756
getopt.c Normal file
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/* THIS IS HERE FOR WIN32's BENEFIT ONLY. */
/* Getopt for GNU.
NOTE: getopt is now part of the C library, so if you don't know what
"Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu
before changing it!
Copyright (C) 1987, 88, 89, 90, 91, 92, 1993
Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef __STDC__
# ifndef const
# define const
# endif
#endif
/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. */
#ifndef _NO_PROTO
#define _NO_PROTO
#endif
#include <stdio.h>
/* Comment out all this code if we are using the GNU C Library, and are not
actually compiling the library itself. This code is part of the GNU C
Library, but also included in many other GNU distributions. Compiling
and linking in this code is a waste when using the GNU C library
(especially if it is a shared library). Rather than having every GNU
program understand `configure --with-gnu-libc' and omit the object files,
it is simpler to just do this in the source for each such file. */
#if defined (_LIBC) || !defined (__GNU_LIBRARY__)
/* This needs to come after some library #include
to get __GNU_LIBRARY__ defined. */
#ifdef __GNU_LIBRARY__
/* Don't include stdlib.h for non-GNU C libraries because some of them
contain conflicting prototypes for getopt. */
#include <stdlib.h>
#endif /* GNU C library. */
/* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a
long-named option. Because this is not POSIX.2 compliant, it is
being phased out. */
/* #define GETOPT_COMPAT */
/* This version of `getopt' appears to the caller like standard Unix `getopt'
but it behaves differently for the user, since it allows the user
to intersperse the options with the other arguments.
As `getopt' works, it permutes the elements of ARGV so that,
when it is done, all the options precede everything else. Thus
all application programs are extended to handle flexible argument order.
Setting the environment variable POSIXLY_CORRECT disables permutation.
Then the behavior is completely standard.
GNU application programs can use a third alternative mode in which
they can distinguish the relative order of options and other arguments. */
#include "getopt.h"
/* For communication from `getopt' to the caller.
When `getopt' finds an option that takes an argument,
the argument value is returned here.
Also, when `ordering' is RETURN_IN_ORDER,
each non-option ARGV-element is returned here. */
char *optarg = 0;
/* Index in ARGV of the next element to be scanned.
This is used for communication to and from the caller
and for communication between successive calls to `getopt'.
On entry to `getopt', zero means this is the first call; initialize.
When `getopt' returns EOF, this is the index of the first of the
non-option elements that the caller should itself scan.
Otherwise, `optind' communicates from one call to the next
how much of ARGV has been scanned so far. */
/* XXX 1003.2 says this must be 1 before any call. */
int optind = 0;
/* The next char to be scanned in the option-element
in which the last option character we returned was found.
This allows us to pick up the scan where we left off.
If this is zero, or a null string, it means resume the scan
by advancing to the next ARGV-element. */
static char *nextchar;
/* Callers store zero here to inhibit the error message
for unrecognized options. */
int opterr = 1;
/* Set to an option character which was unrecognized.
This must be initialized on some systems to avoid linking in the
system's own getopt implementation. */
#define BAD_OPTION '\0'
int optopt = BAD_OPTION;
/* Describe how to deal with options that follow non-option ARGV-elements.
If the caller did not specify anything,
the default is REQUIRE_ORDER if the environment variable
POSIXLY_CORRECT is defined, PERMUTE otherwise.
REQUIRE_ORDER means don't recognize them as options;
stop option processing when the first non-option is seen.
This is what Unix does.
This mode of operation is selected by either setting the environment
variable POSIXLY_CORRECT, or using `+' as the first character
of the list of option characters.
PERMUTE is the default. We permute the contents of ARGV as we scan,
so that eventually all the non-options are at the end. This allows options
to be given in any order, even with programs that were not written to
expect this.
RETURN_IN_ORDER is an option available to programs that were written
to expect options and other ARGV-elements in any order and that care about
the ordering of the two. We describe each non-option ARGV-element
as if it were the argument of an option with character code 1.
Using `-' as the first character of the list of option characters
selects this mode of operation.
The special argument `--' forces an end of option-scanning regardless
of the value of `ordering'. In the case of RETURN_IN_ORDER, only
`--' can cause `getopt' to return EOF with `optind' != ARGC. */
static enum
{
REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
} ordering;
#ifdef __GNU_LIBRARY__
/* We want to avoid inclusion of string.h with non-GNU libraries
because there are many ways it can cause trouble.
On some systems, it contains special magic macros that don't work
in GCC. */
#include <string.h>
#define my_index strchr
#define my_strlen strlen
#else
/* Avoid depending on library functions or files
whose names are inconsistent. */
#if __STDC__ || defined(PROTO)
extern char *getenv(const char *name);
extern int strcmp (const char *s1, const char *s2);
extern int strncmp(const char *s1, const char *s2, int n);
static int my_strlen(const char *s);
static char *my_index (const char *str, int chr);
#else
extern char *getenv ();
#endif
static int
my_strlen (str)
const char *str;
{
int n = 0;
while (*str++)
n++;
return n;
}
static char *
my_index (str, chr)
const char *str;
int chr;
{
while (*str)
{
if (*str == chr)
return (char *) str;
str++;
}
return 0;
}
#endif /* GNU C library. */
/* Handle permutation of arguments. */
/* Describe the part of ARGV that contains non-options that have
been skipped. `first_nonopt' is the index in ARGV of the first of them;
`last_nonopt' is the index after the last of them. */
static int first_nonopt;
static int last_nonopt;
/* Exchange two adjacent subsequences of ARGV.
One subsequence is elements [first_nonopt,last_nonopt)
which contains all the non-options that have been skipped so far.
The other is elements [last_nonopt,optind), which contains all
the options processed since those non-options were skipped.
`first_nonopt' and `last_nonopt' are relocated so that they describe
the new indices of the non-options in ARGV after they are moved.
To perform the swap, we first reverse the order of all elements. So
all options now come before all non options, but they are in the
wrong order. So we put back the options and non options in original
order by reversing them again. For example:
original input: a b c -x -y
reverse all: -y -x c b a
reverse options: -x -y c b a
reverse non options: -x -y a b c
*/
#if __STDC__ || defined(PROTO)
static void exchange (char **argv);
#endif
static void
exchange (argv)
char **argv;
{
char *temp, **first, **last;
/* Reverse all the elements [first_nonopt, optind) */
first = &argv[first_nonopt];
last = &argv[optind-1];
while (first < last) {
temp = *first; *first = *last; *last = temp; first++; last--;
}
/* Put back the options in order */
first = &argv[first_nonopt];
first_nonopt += (optind - last_nonopt);
last = &argv[first_nonopt - 1];
while (first < last) {
temp = *first; *first = *last; *last = temp; first++; last--;
}
/* Put back the non options in order */
first = &argv[first_nonopt];
last_nonopt = optind;
last = &argv[last_nonopt-1];
while (first < last) {
temp = *first; *first = *last; *last = temp; first++; last--;
}
}
/* Scan elements of ARGV (whose length is ARGC) for option characters
given in OPTSTRING.
If an element of ARGV starts with '-', and is not exactly "-" or "--",
then it is an option element. The characters of this element
(aside from the initial '-') are option characters. If `getopt'
is called repeatedly, it returns successively each of the option characters
from each of the option elements.
If `getopt' finds another option character, it returns that character,
updating `optind' and `nextchar' so that the next call to `getopt' can
resume the scan with the following option character or ARGV-element.
If there are no more option characters, `getopt' returns `EOF'.
Then `optind' is the index in ARGV of the first ARGV-element
that is not an option. (The ARGV-elements have been permuted
so that those that are not options now come last.)
OPTSTRING is a string containing the legitimate option characters.
If an option character is seen that is not listed in OPTSTRING,
return BAD_OPTION after printing an error message. If you set `opterr' to
zero, the error message is suppressed but we still return BAD_OPTION.
If a char in OPTSTRING is followed by a colon, that means it wants an arg,
so the following text in the same ARGV-element, or the text of the following
ARGV-element, is returned in `optarg'. Two colons mean an option that
wants an optional arg; if there is text in the current ARGV-element,
it is returned in `optarg', otherwise `optarg' is set to zero.
If OPTSTRING starts with `-' or `+', it requests different methods of
handling the non-option ARGV-elements.
See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
Long-named options begin with `--' instead of `-'.
Their names may be abbreviated as long as the abbreviation is unique
or is an exact match for some defined option. If they have an
argument, it follows the option name in the same ARGV-element, separated
from the option name by a `=', or else the in next ARGV-element.
When `getopt' finds a long-named option, it returns 0 if that option's
`flag' field is nonzero, the value of the option's `val' field
if the `flag' field is zero.
The elements of ARGV aren't really const, because we permute them.
But we pretend they're const in the prototype to be compatible
with other systems.
LONGOPTS is a vector of `struct option' terminated by an
element containing a name which is zero.
LONGIND returns the index in LONGOPT of the long-named option found.
It is only valid when a long-named option has been found by the most
recent call.
If LONG_ONLY is nonzero, '-' as well as '--' can introduce
long-named options. */
int
_getopt_internal (argc, argv, optstring, longopts, longind, long_only)
int argc;
char *const *argv;
const char *optstring;
const struct option *longopts;
int *longind;
int long_only;
{
int option_index;
optarg = 0;
/* Initialize the internal data when the first call is made.
Start processing options with ARGV-element 1 (since ARGV-element 0
is the program name); the sequence of previously skipped
non-option ARGV-elements is empty. */
if (optind == 0)
{
first_nonopt = last_nonopt = optind = 1;
nextchar = NULL;
/* Determine how to handle the ordering of options and nonoptions. */
if (optstring[0] == '-')
{
ordering = RETURN_IN_ORDER;
++optstring;
}
else if (optstring[0] == '+')
{
ordering = REQUIRE_ORDER;
++optstring;
}
else if (getenv ("POSIXLY_CORRECT") != NULL)
ordering = REQUIRE_ORDER;
else
ordering = PERMUTE;
}
if (nextchar == NULL || *nextchar == '\0')
{
if (ordering == PERMUTE)
{
/* If we have just processed some options following some non-options,
exchange them so that the options come first. */
if (first_nonopt != last_nonopt && last_nonopt != optind)
exchange ((char **) argv);
else if (last_nonopt != optind)
first_nonopt = optind;
/* Now skip any additional non-options
and extend the range of non-options previously skipped. */
while (optind < argc
&& (argv[optind][0] != '-' || argv[optind][1] == '\0')
#ifdef GETOPT_COMPAT
&& (longopts == NULL
|| argv[optind][0] != '+' || argv[optind][1] == '\0')
#endif /* GETOPT_COMPAT */
)
optind++;
last_nonopt = optind;
}
/* Special ARGV-element `--' means premature end of options.
Skip it like a null option,
then exchange with previous non-options as if it were an option,
then skip everything else like a non-option. */
if (optind != argc && !strcmp (argv[optind], "--"))
{
optind++;
if (first_nonopt != last_nonopt && last_nonopt != optind)
exchange ((char **) argv);
else if (first_nonopt == last_nonopt)
first_nonopt = optind;
last_nonopt = argc;
optind = argc;
}
/* If we have done all the ARGV-elements, stop the scan
and back over any non-options that we skipped and permuted. */
if (optind == argc)
{
/* Set the next-arg-index to point at the non-options
that we previously skipped, so the caller will digest them. */
if (first_nonopt != last_nonopt)
optind = first_nonopt;
return EOF;
}
/* If we have come to a non-option and did not permute it,
either stop the scan or describe it to the caller and pass it by. */
if ((argv[optind][0] != '-' || argv[optind][1] == '\0')
#ifdef GETOPT_COMPAT
&& (longopts == NULL
|| argv[optind][0] != '+' || argv[optind][1] == '\0')
#endif /* GETOPT_COMPAT */
)
{
if (ordering == REQUIRE_ORDER)
return EOF;
optarg = argv[optind++];
return 1;
}
/* We have found another option-ARGV-element.
Start decoding its characters. */
nextchar = (argv[optind] + 1
+ (longopts != NULL && argv[optind][1] == '-'));
}
if (longopts != NULL
&& ((argv[optind][0] == '-'
&& (argv[optind][1] == '-' || long_only))
#ifdef GETOPT_COMPAT
|| argv[optind][0] == '+'
#endif /* GETOPT_COMPAT */
))
{
const struct option *p;
char *s = nextchar;
int exact = 0;
int ambig = 0;
const struct option *pfound = NULL;
int indfound = 0;
while (*s && *s != '=')
s++;
/* Test all options for either exact match or abbreviated matches. */
for (p = longopts, option_index = 0; p->name;
p++, option_index++)
if (!strncmp (p->name, nextchar, s - nextchar))
{
if (s - nextchar == my_strlen (p->name))
{
/* Exact match found. */
pfound = p;
indfound = option_index;
exact = 1;
break;
}
else if (pfound == NULL)
{
/* First nonexact match found. */
pfound = p;
indfound = option_index;
}
else
/* Second nonexact match found. */
ambig = 1;
}
if (ambig && !exact)
{
if (opterr)
fprintf (stderr, "%s: option `%s' is ambiguous\n",
argv[0], argv[optind]);
nextchar += my_strlen (nextchar);
optind++;
return BAD_OPTION;
}
if (pfound != NULL)
{
option_index = indfound;
optind++;
if (*s)
{
/* Don't test has_arg with >, because some C compilers don't
allow it to be used on enums. */
if (pfound->has_arg)
optarg = s + 1;
else
{
if (opterr)
{
if (argv[optind - 1][1] == '-')
/* --option */
fprintf (stderr,
"%s: option `--%s' doesn't allow an argument\n",
argv[0], pfound->name);
else
/* +option or -option */
fprintf (stderr,
"%s: option `%c%s' doesn't allow an argument\n",
argv[0], argv[optind - 1][0], pfound->name);
}
nextchar += my_strlen (nextchar);
return BAD_OPTION;
}
}
else if (pfound->has_arg == 1)
{
if (optind < argc)
optarg = argv[optind++];
else
{
if (opterr)
fprintf (stderr, "%s: option `%s' requires an argument\n",
argv[0], argv[optind - 1]);
nextchar += my_strlen (nextchar);
return optstring[0] == ':' ? ':' : BAD_OPTION;
}
}
nextchar += my_strlen (nextchar);
if (longind != NULL)
*longind = option_index;
if (pfound->flag)
{
*(pfound->flag) = pfound->val;
return 0;
}
return pfound->val;
}
/* Can't find it as a long option. If this is not getopt_long_only,
or the option starts with '--' or is not a valid short
option, then it's an error.
Otherwise interpret it as a short option. */
if (!long_only || argv[optind][1] == '-'
#ifdef GETOPT_COMPAT
|| argv[optind][0] == '+'
#endif /* GETOPT_COMPAT */
|| my_index (optstring, *nextchar) == NULL)
{
if (opterr)
{
if (argv[optind][1] == '-')
/* --option */
fprintf (stderr, "%s: unrecognized option `--%s'\n",
argv[0], nextchar);
else
/* +option or -option */
fprintf (stderr, "%s: unrecognized option `%c%s'\n",
argv[0], argv[optind][0], nextchar);
}
nextchar = (char *) "";
optind++;
return BAD_OPTION;
}
}
/* Look at and handle the next option-character. */
{
char c = *nextchar++;
char *temp = my_index (optstring, c);
/* Increment `optind' when we start to process its last character. */
if (*nextchar == '\0')
++optind;
if (temp == NULL || c == ':')
{
if (opterr)
{
#if 0
if (c < 040 || c >= 0177)
fprintf (stderr, "%s: unrecognized option, character code 0%o\n",
argv[0], c);
else
fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c);
#else
/* 1003.2 specifies the format of this message. */
fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c);
#endif
}
optopt = c;
return BAD_OPTION;
}
if (temp[1] == ':')
{
if (temp[2] == ':')
{
/* This is an option that accepts an argument optionally. */
if (*nextchar != '\0')
{
optarg = nextchar;
optind++;
}
else
optarg = 0;
nextchar = NULL;
}
else
{
/* This is an option that requires an argument. */
if (*nextchar != '\0')
{
optarg = nextchar;
/* If we end this ARGV-element by taking the rest as an arg,
we must advance to the next element now. */
optind++;
}
else if (optind == argc)
{
if (opterr)
{
#if 0
fprintf (stderr, "%s: option `-%c' requires an argument\n",
argv[0], c);
#else
/* 1003.2 specifies the format of this message. */
fprintf (stderr, "%s: option requires an argument -- %c\n",
argv[0], c);
#endif
}
optopt = c;
if (optstring[0] == ':')
c = ':';
else
c = BAD_OPTION;
}
else
/* We already incremented `optind' once;
increment it again when taking next ARGV-elt as argument. */
optarg = argv[optind++];
nextchar = NULL;
}
}
return c;
}
}
int
getopt (argc, argv, optstring)
int argc;
char *const *argv;
const char *optstring;
{
return _getopt_internal (argc, argv, optstring,
(const struct option *) 0,
(int *) 0,
0);
}
int
getopt_long (argc, argv, options, long_options, opt_index)
int argc;
char *const *argv;
const char *options;
const struct option *long_options;
int *opt_index;
{
return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
}
#endif /* _LIBC or not __GNU_LIBRARY__. */
#ifdef TEST
/* Compile with -DTEST to make an executable for use in testing
the above definition of `getopt'. */
int
main (argc, argv)
int argc;
char **argv;
{
int c;
int digit_optind = 0;
while (1)
{
int this_option_optind = optind ? optind : 1;
c = getopt (argc, argv, "abc:d:0123456789");
if (c == EOF)
break;
switch (c)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (digit_optind != 0 && digit_optind != this_option_optind)
printf ("digits occur in two different argv-elements.\n");
digit_optind = this_option_optind;
printf ("option %c\n", c);
break;
case 'a':
printf ("option a\n");
break;
case 'b':
printf ("option b\n");
break;
case 'c':
printf ("option c with value `%s'\n", optarg);
break;
case BAD_OPTION:
break;
default:
printf ("?? getopt returned character code 0%o ??\n", c);
}
}
if (optind < argc)
{
printf ("non-option ARGV-elements: ");
while (optind < argc)
printf ("%s ", argv[optind++]);
printf ("\n");
}
exit (0);
}
#endif /* TEST */

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/* THIS IS HERE FOR WIN32's BENEFIT ONLY. */
/* Declarations for getopt.
Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef _GETOPT_H
#define _GETOPT_H 1
#ifdef __cplusplus
extern "C" {
#endif
/* For communication from `getopt' to the caller.
When `getopt' finds an option that takes an argument,
the argument value is returned here.
Also, when `ordering' is RETURN_IN_ORDER,
each non-option ARGV-element is returned here. */
extern char *optarg;
/* Index in ARGV of the next element to be scanned.
This is used for communication to and from the caller
and for communication between successive calls to `getopt'.
On entry to `getopt', zero means this is the first call; initialize.
When `getopt' returns EOF, this is the index of the first of the
non-option elements that the caller should itself scan.
Otherwise, `optind' communicates from one call to the next
how much of ARGV has been scanned so far. */
extern int optind;
/* Callers store zero here to inhibit the error message `getopt' prints
for unrecognized options. */
extern int opterr;
/* Set to an option character which was unrecognized. */
extern int optopt;
/* Describe the long-named options requested by the application.
The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
of `struct option' terminated by an element containing a name which is
zero.
The field `has_arg' is:
no_argument (or 0) if the option does not take an argument,
required_argument (or 1) if the option requires an argument,
optional_argument (or 2) if the option takes an optional argument.
If the field `flag' is not NULL, it points to a variable that is set
to the value given in the field `val' when the option is found, but
left unchanged if the option is not found.
To have a long-named option do something other than set an `int' to
a compiled-in constant, such as set a value from `optarg', set the
option's `flag' field to zero and its `val' field to a nonzero
value (the equivalent single-letter option character, if there is
one). For long options that have a zero `flag' field, `getopt'
returns the contents of the `val' field. */
struct option
{
#if __STDC__
const char *name;
#else
char *name;
#endif
/* has_arg can't be an enum because some compilers complain about
type mismatches in all the code that assumes it is an int. */
int has_arg;
int *flag;
int val;
};
/* Names for the values of the `has_arg' field of `struct option'. */
#define no_argument 0
#define required_argument 1
#define optional_argument 2
#if __STDC__ || defined(PROTO)
#if defined(__GNU_LIBRARY__)
/* Many other libraries have conflicting prototypes for getopt, with
differences in the consts, in stdlib.h. To avoid compilation
errors, only prototype getopt for the GNU C library. */
extern int getopt (int argc, char *const *argv, const char *shortopts);
#endif /* not __GNU_LIBRARY__ */
extern int getopt_long (int argc, char *const *argv, const char *shortopts,
const struct option *longopts, int *longind);
extern int getopt_long_only (int argc, char *const *argv,
const char *shortopts,
const struct option *longopts, int *longind);
/* Internal only. Users should not call this directly. */
extern int _getopt_internal (int argc, char *const *argv,
const char *shortopts,
const struct option *longopts, int *longind,
int long_only);
#else /* not __STDC__ */
extern int getopt ();
extern int getopt_long ();
extern int getopt_long_only ();
extern int _getopt_internal ();
#endif /* not __STDC__ */
#ifdef __cplusplus
}
#endif
#endif /* _GETOPT_H */

29
index.html
View File

@ -4,9 +4,9 @@
</head>
<body bgcolor="#FFFFF0">
<!--
Copyright (c) 1997, 1998, Thomas Boutell and Boutell.Com, Inc.
Copyright (c) 1997, 1998, 1999, Thomas Boutell and Boutell.Com, Inc.
This software is released for free use under the terms of
the GNU Public License, version 2 or higher.
the GNU General Public License, version 2 or higher.
-->
<table>
<tr>
@ -26,14 +26,20 @@ rinetd -- internet ``redirection server''
<p>
<font color="#FF8888" size="4">VERSION</font>
<p>
Version 0.52, 8/7/1998.
Version 0.61, 3/1/1999.
<p>
<font color="#FF8888" size="4">WHERE TO GET</font>
<p>
<strong>For Linux:</strong>
<a href="ftp://ftp.boutell.com/pub/boutell/rinetd/rinetd.tar.gz">By
anonymous FTP from ftp.boutell.com</a> in the subdirectory
<code>boutell/rinetd</code> as the file <code>rinetd.tar.gz</code>.
<p>
<strong>For Windows 95/98/NT:</strong>
<a href="ftp://ftp.boutell.com/pub/boutell/rinetd/rinetd.zip">By
anonymous FTP from ftp.boutell.com</a> in the subdirectory
<code>boutell/rinetd</code> as the file <code>rinetd.zip</code>.
<p>
<font color="#FF8888" size="4">DESCRIPTION</font>
<p>
Redirects TCP connections from one IP address and port to another. rinetd
@ -78,7 +84,7 @@ can be used. For example:
<pre>
0.0.0.0 23 10.1.1.2 23
</pre>
Would redirect all connections to port 80, for all IP addresses
Would redirect all connections to port 23, for all IP addresses
assigned to the server. This is the default behavior for most
other programs.
<p>
@ -200,9 +206,9 @@ configuration file option.
The server redirected to is not able to identify the host the
client really came from. This cannot be corrected; however,
the log produced by rinetd provides a way to obtain this
information. Sockets would theoretically lose data when closed
information. Under Unix, sockets would theoretically lose data when closed
with <code>SO_LINGER</code> turned off, but in Linux this is not the case
(kernel source comments support this belief on my part). On non-Linux
(kernel source comments support this belief on my part). On non-Linux Unix
platforms, alternate code which uses a different trick to work around
blocking <code>close()</code> is provided, but this code is untested.
<p>
@ -210,11 +216,11 @@ The logging is inadequate. The duration of the connection should be logged.
<p>
<font color="#FF8888" size="4">LICENSE</font>
<p>
Copyright (c) 1997, 1998,
Copyright (c) 1997, 1998, 1999,
<a href="http://www.boutell.com/boutell">Thomas Boutell</a> and
<a href="http://www.boutell.com/">Boutell.Com, Inc.</a>
This software is released for free use under the terms of
the GNU Public License, version 2 or higher.
the GNU General Public License, version 2 or higher.
<p>
<font color="#FF8888" size="4">CONTACT INFORMATION</font>
<p>
@ -225,8 +231,9 @@ Thomas Boutell can be reached by email:
<p>
<font color="#FF8888" size="4">THANKS</font>
<p>
Thanks are due to Bill Davidsen, Libor Pechachek, Sascha Ziemann, the
Apache Group, and many others who have contributed advice
and/or source code to this and other open software projects.
Thanks are due to Bill Davidsen, Libor Pechachek, Sascha Ziemann,
Joel S. Noble, the Apache Group, and many others who have contributed
advice, encouragement and/or source code to this and other open
software projects.
</body>
</html>

35
match.c
View File

@ -12,8 +12,11 @@ int matchNoCase(char *sorig, char *p)
return matchBody(sorig, p, 1);
}
#define CASE(x) (nocase ? tolower(x) : (x))
int matchBody(char *sorig, char *p, int nocase)
{
static int dummy = 0;
/* Algorithm:
Word separator: *. End-of-string
@ -28,7 +31,7 @@ int matchBody(char *sorig, char *p, int nocase)
and s contain end-of-string at that
point, return success.
\ escapes the next character, including \ itself.
\ escapes the next character, including \ itself (6.0).
For each *:
@ -49,7 +52,11 @@ int matchBody(char *sorig, char *p, int nocase)
char *s = sorig;
int escaped = 0;
if (strstr(p, "WS-0000")) {
if (strstr(s, "ws_ftp_pro.html")) {
dummy = 1;
}
}
while (1) {
char *word;
int wordLen;
@ -61,14 +68,8 @@ int matchBody(char *sorig, char *p, int nocase)
if ((*s == '\0') && (*p == '\0')) {
return 1;
}
if (nocase) {
if (tolower(*p) != tolower(*s)) {
goto nextPattern;
}
} else {
if (*p != *s) {
goto nextPattern;
}
if (CASE(*p) != CASE(*s)) {
goto nextPattern;
}
p++;
s++;
@ -111,7 +112,7 @@ int matchBody(char *sorig, char *p, int nocase)
}
break;
}
if ((((*s) == word[wordPos]) ||
if ((((CASE(*s)) == CASE(word[wordPos])) ||
((*s == '\0') &&
(word[wordPos] == '|'))) ||
(((*s != '\0') && (*s != '|')) &&
@ -138,15 +139,9 @@ int matchBody(char *sorig, char *p, int nocase)
(*p == '|'))) {
return 1;
}
if (nocase) {
if (tolower(*p) != tolower(*s)) {
goto nextPattern;
}
} else {
if (*p != *s) {
goto nextPattern;
}
}
if (CASE(*p) != CASE(*s)) {
goto nextPattern;
}
p++;
s++;
break;

14
rinetd.8
View File

@ -1,8 +1,8 @@
.\" Copyright (c) 1997, 1998, Thomas Boutell and Boutell.Com, Inc.
.\" Copyright (c) 1997, 1998, 1999, Thomas Boutell and Boutell.Com, Inc.
.\" This software is released for free use under the terms of
.\" the GNU Public License, version 2 or higher.
.\"
.Dd February 11, 1998
.Dd February 18, 1999
.Dt RINETD 8
.Os LINUX
.Sh NAME
@ -12,7 +12,7 @@
.Sh SYNOPSIS
.Nm /usr/sbin/rinetd
.Sh VERSION
Version 0.52, 9/7/1998.
Version 0.61, 3/1/1999.
.Sh DESCRIPTION
.Nm rinetd
redirects TCP connections from one IP address and port to another. rinetd
@ -54,7 +54,7 @@ can be used. For example:
.Pp
0.0.0.0 23 10.1.1.2 23
.Pp
Would redirect all connections to port 80, for all IP addresses
Would redirect all connections to port 23, for all IP addresses
assigned to the server. This is the default behavior for most
other programs.
.Pp
@ -170,14 +170,14 @@ use a single TCP socket. This rules out FTP.
The server redirected to is not able to identify the host the
client really came from. This cannot be corrected; however,
the log produced by rinetd provides a way to obtain this
information. Sockets would theoretically lose data when closed
information. Under Unix, Sockets would theoretically lose data when closed
with SO_LINGER turned off, but in Linux this is not the case (kernel
source comments support this belief on my part). On non-Linux platforms,
source comments support this belief on my part). On non-Linux Unix platforms,
alternate code which uses a different trick to work around blocking close()
is provided, but this code is untested. The logging is inadequate.
The duration of each connection should be logged.
.Sh LICENSE
Copyright (c) 1997, 1998, Thomas Boutell and Boutell.Com, Inc.
Copyright (c) 1997, 1998, 1999, Thomas Boutell and Boutell.Com, Inc.
This software is released for free use under the terms of
the GNU Public License, version 2 or higher. NO WARRANTY
IS EXPRESSED OR IMPLIED. USE THIS SOFTWARE AT YOUR OWN RISK.

213
rinetd.c
View File

@ -1,19 +1,75 @@
#include <stdio.h>
#include <string.h>
#define VERSION "0.61"
#ifdef WIN32
#include <windows.h>
#include <winsock.h>
#include "getopt.h"
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netdb.h>
#include <signal.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/time.h>
#include <time.h>
#include <getopt.h>
#include <errno.h>
#define INVALID_SOCKET (-1)
#include <sys/time.h>
#endif /* WIN32 */
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <fcntl.h>
#include <time.h>
#include <ctype.h>
#define VERSION "0.52"
#ifndef WIN32
/* Windows sockets compatibility defines */
#define INVALID_SOCKET (-1)
#define SOCKET_ERROR (-1)
int closesocket(int s);
int closesocket(int s) {
return close(s);
}
#define ioctlsocket ioctl
#define MAKEWORD(a, b)
#define WSAStartup(a, b) (0)
#define WSACleanup()
#ifdef __MAC__
/* The constants for these are a little screwy in the prelinked
MSL GUSI lib and we can't rebuild it, so roll with it */
#define WSAEWOULDBLOCK EWOULDBLOCK
#define WSAEAGAIN EAGAIN
#define WSAEINPROGRESS EINPROGRESS
#else
#define WSAEWOULDBLOCK EWOULDBLOCK
#define WSAEAGAIN EAGAIN
#define WSAEINPROGRESS EINPROGRESS
#endif /* __MAC__ */
#define WSAEINTR EINTR
#define SOCKET int
#define GetLastError() (errno)
typedef struct {
int dummy;
} WSADATA;
void Sleep(long ms);
void Sleep(long ms)
{
struct timeval tv;
tv.tv_sec = ms / 1000;
tv.tv_usec = ms * 1000;
select(0, 0, 0, 0, &tv);
}
#else
/* WIN32 doesn't really have WSAEAGAIN */
#ifndef WSAEAGAIN
#define WSAEAGAIN WSAEWOULDBLOCK
#endif
#endif /* WIN32 */
#ifndef TRUE
#define TRUE 1
@ -29,7 +85,15 @@
#define PERROR(x)
#endif /* DEBUG */
int *seFds = 0;
/* We've got to get FIONBIO from somewhere. Try the Solaris location
if it isn't defined yet by the above includes. */
#ifndef FIONBIO
#include <sys/filio.h>
#endif /* FIONBIO */
#include "match.h"
SOCKET *seFds = 0;
/* In network order, for network purposes */
struct in_addr *seLocalAddrs = 0;
unsigned short *seLocalPorts = 0;
@ -49,8 +113,8 @@ int *seDenyRules = 0;
int *seDenyRulesTotal = 0;
int globalDenyRules = 0;
int *reFds = 0;
int *loFds = 0;
SOCKET *reFds = 0;
SOCKET *loFds = 0;
unsigned char *reAddresses = 0;
int *coInputRPos = 0;
int *coInputWPos = 0;
@ -111,6 +175,8 @@ void selectLoop(void);
void log(int i, int coSe, int result);
int getAddress(char *host, struct in_addr *iaddr);
char *logMessages[] = {
"done-local-closed",
"done-remote-closed",
@ -151,24 +217,37 @@ RinetdOptions options = {
"/etc/rinetd.conf"
};
int readAargs (int argc,
int readArgs (int argc,
char **argv,
RinetdOptions *options);
int main(int argc, char *argv[])
{
WSADATA wsaData;
int result = WSAStartup(MAKEWORD(1, 1), &wsaData);
if (result != 0) {
fprintf(stderr, "Your computer was not connected "
"to the Internet at the time that "
"this program was launched, or you "
"do not have a 32-bit "
"connection to the Internet.");
exit(1);
}
readArgs(argc, argv, &options);
#ifndef WIN32
#ifndef DEBUG
if (!fork()) {
if (!fork()) {
#endif /* DEBUG */
signal(SIGPIPE, plumber);
signal(SIGHUP, hup);
#endif /* WIN32 */
signal(SIGTERM, term);
initArrays();
readConfiguration();
RegisterPID();
selectLoop();
#ifndef WIN32
#ifndef DEBUG
} else {
exit(0);
@ -177,6 +256,7 @@ int main(int argc, char *argv[])
exit(0);
}
#endif /* DEBUG */
#endif /* WIN32 */
return 0;
}
@ -196,7 +276,7 @@ void readConfiguration(void)
/* Close existing server sockets. */
for (i = 0; (i < seTotal); i++) {
if (seFds[i] != -1) {
close(seFds[i]);
closesocket(seFds[i]);
free(seFromHosts[i]);
free(seToHosts[i]);
}
@ -272,7 +352,7 @@ void readConfiguration(void)
}
}
fclose(in);
seFds = (int *) malloc(sizeof(int) * seTotal);
seFds = (SOCKET *) malloc(sizeof(int) * seTotal);
if (!seFds) {
goto lowMemory;
}
@ -498,49 +578,51 @@ void readConfiguration(void)
}
/* Make a server socket */
seFds[i] = socket(PF_INET, SOCK_STREAM, 0);
if (seFds[i] < 0) {
if (seFds[i] == INVALID_SOCKET) {
fprintf(stderr, "rinetd: couldn't create "
"server socket!\n");
seFds[i] = -1;
continue;
}
#ifndef WIN32
if (seFds[i] > maxfd) {
maxfd = seFds[i];
}
#endif
saddr.sin_family = AF_INET;
memcpy(&saddr.sin_addr, &iaddr, sizeof(iaddr));
saddr.sin_port = htons(bindPort);
j = 1;
setsockopt(seFds[i], SOL_SOCKET, SO_REUSEADDR,
&j, sizeof(j));
(const char *) &j, sizeof(j));
if (bind(seFds[i], (struct sockaddr *)
&saddr, sizeof(saddr)) < 0)
&saddr, sizeof(saddr)) == SOCKET_ERROR)
{
/* Warn -- don't exit. */
fprintf(stderr, "rinetd: couldn't bind to "
"address %s port %d\n",
bindAddress, bindPort);
close(seFds[i]);
seFds[i] = -1;
closesocket(seFds[i]);
seFds[i] = INVALID_SOCKET;
continue;
}
if (listen(seFds[i], 5) < 0) {
if (listen(seFds[i], 5) == SOCKET_ERROR) {
/* Warn -- don't exit. */
fprintf(stderr, "rinetd: couldn't listen to "
"address %s port %d\n",
bindAddress, bindPort);
close(seFds[i]);
seFds[i] = -1;
closesocket(seFds[i]);
seFds[i] = INVALID_SOCKET;
continue;
}
fcntl(seFds[i], F_SETFL, O_NONBLOCK);
ioctlsocket(seFds[i], FIONBIO, &j);
if (!getAddress(connectAddress, &iaddr)) {
/* Warn -- don't exit. */
fprintf(stderr, "rinetd: host %s could not be "
"resolved on line %d.\n",
bindAddress, lnum);
close(seFds[i]);
seFds[i] = -1;
closesocket(seFds[i]);
seFds[i] = INVALID_SOCKET;
continue;
}
seLocalAddrs[i] = iaddr;
@ -610,8 +692,8 @@ void initArrays(void)
{
int j;
coTotal = 64;
reFds = (int *) malloc(sizeof(int) * coTotal);
loFds = (int *) malloc(sizeof(int) * coTotal);
reFds = (SOCKET *) malloc(sizeof(int) * coTotal);
loFds = (SOCKET *) malloc(sizeof(int) * coTotal);
coInputRPos = (int *) malloc(sizeof(int) * coTotal);
coInputWPos = (int *) malloc(sizeof(int) * coTotal);
coOutputRPos = (int *) malloc(sizeof(int) * coTotal);
@ -675,7 +757,7 @@ void selectPass(void) {
FD_ZERO(&writefds);
/* Server sockets */
for (i = 0; (i < seTotal); i++) {
if (seFds[i] != -1) {
if (seFds[i] != INVALID_SOCKET) {
FD_SET(seFds[i], &readfds);
}
}
@ -763,10 +845,10 @@ void handleRemoteRead(int i)
return;
}
if (got < 0) {
if (errno == EWOULDBLOCK) {
if (GetLastError() == WSAEWOULDBLOCK) {
return;
}
if (errno == EINPROGRESS) {
if (GetLastError() == WSAEINPROGRESS) {
return;
}
handleCloseFromRemote(i);
@ -784,16 +866,16 @@ void handleRemoteWrite(int i)
coClosed[i] = 1;
PERROR("rinetd: local closed and no more output");
log(i, coSe[i], logDone | coLog[i]);
close(reFds[i]);
closesocket(reFds[i]);
return;
}
got = send(reFds[i], coOutput[i] + coOutputWPos[i],
coOutputRPos[i] - coOutputWPos[i], 0);
if (got < 0) {
if (errno == EWOULDBLOCK) {
if (GetLastError() == WSAEWOULDBLOCK) {
return;
}
if (errno == EINPROGRESS) {
if (GetLastError() == WSAEINPROGRESS) {
return;
}
handleCloseFromRemote(i);
@ -820,10 +902,10 @@ void handleLocalRead(int i)
return;
}
if (got < 0) {
if (errno == EWOULDBLOCK) {
if (GetLastError() == WSAEWOULDBLOCK) {
return;
}
if (errno == EINPROGRESS) {
if (GetLastError() == WSAEINPROGRESS) {
return;
}
handleCloseFromLocal(i);
@ -840,16 +922,16 @@ void handleLocalWrite(int i)
coClosed[i] = 1;
PERROR("remote closed and no more input");
log(i, coSe[i], logDone | coLog[i]);
close(loFds[i]);
closesocket(loFds[i]);
return;
}
got = send(loFds[i], coInput[i] + coInputWPos[i],
coInputRPos[i] - coInputWPos[i], 0);
if (got < 0) {
if (errno == EWOULDBLOCK) {
if (GetLastError() == WSAEWOULDBLOCK) {
return;
}
if (errno == EINPROGRESS) {
if (GetLastError() == WSAEINPROGRESS) {
return;
}
handleCloseFromLocal(i);
@ -869,10 +951,11 @@ void handleCloseFromLocal(int i)
/* The local end fizzled out, so make sure
we're all done with that */
PERROR("close from local");
close(loFds[i]);
closesocket(loFds[i]);
loClosed[i] = 1;
if (!reClosed[i]) {
#ifndef LINUX
#ifndef WIN32
/* Now set up the remote end for a polite closing */
/* Request a low-water mark equal to the entire
@ -881,6 +964,7 @@ void handleCloseFromLocal(int i)
arg = 1024;
setsockopt(reFds[i], SOL_SOCKET, SO_SNDLOWAT,
&arg, sizeof(arg));
#endif /* WIN32 */
#endif /* LINUX */
coLog[i] = logLocalClosedFirst;
}
@ -893,10 +977,11 @@ void handleCloseFromRemote(int i)
/* The remote end fizzled out, so make sure
we're all done with that */
PERROR("close from remote");
close(reFds[i]);
closesocket(reFds[i]);
reClosed[i] = 1;
if (!loClosed[i]) {
#ifndef LINUX
#ifndef WIN32
/* Now set up the local end for a polite closing */
/* Request a low-water mark equal to the entire
@ -905,6 +990,7 @@ void handleCloseFromRemote(int i)
arg = 1024;
setsockopt(loFds[i], SOL_SOCKET, SO_SNDLOWAT,
&arg, sizeof(arg));
#endif /* WIN32 */
#endif /* LINUX */
loClosed[i] = 0;
coLog[i] = logRemoteClosedFirst;
@ -923,20 +1009,24 @@ void handleAccept(int i)
int addrlen;
int index = -1;
int o;
int nfd;
SOCKET nfd;
addrlen = sizeof(addr);
nfd = accept(seFds[i], &addr, &addrlen);
if (nfd < 0) {
if (nfd == INVALID_SOCKET) {
log(-1, i, logAcceptFailed);
return;
}
#ifndef WIN32
if (nfd > maxfd) {
maxfd = nfd;
}
#endif /* WIN32 */
j = 1;
fcntl(nfd, F_SETFL, O_NONBLOCK);
ioctlsocket(nfd, FIONBIO, &j);
j = 0;
#ifndef WIN32
setsockopt(nfd, SOL_SOCKET, SO_LINGER, &j, sizeof(j));
#endif
for (j = 0; (j < coTotal); j++) {
if (coClosed[j]) {
index = j;
@ -947,12 +1037,12 @@ void handleAccept(int i)
o = coTotal;
coTotal *= 2;
if (!SAFE_REALLOC(&reFds, sizeof(int) * o,
sizeof(int) * coTotal))
sizeof(SOCKET) * coTotal))
{
goto shortage;
}
if (!SAFE_REALLOC(&loFds, sizeof(int) * o,
sizeof(int) * coTotal))
sizeof(SOCKET) * coTotal))
{
goto shortage;
}
@ -1142,24 +1232,26 @@ void openLocalFd(int se, int i)
int j;
struct sockaddr_in saddr;
loFds[i] = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (loFds[i] < 0) {
close(reFds[i]);
if (loFds[i] == INVALID_SOCKET) {
closesocket(reFds[i]);
reClosed[i] = 1;
loClosed[i] = 1;
coClosed[i] = 1;
log(i, coSe[i], logLocalSocketFailed);
return;
}
#ifndef WIN32
if (loFds[i] > maxfd) {
maxfd = loFds[i];
}
#endif /* WIN32 */
/* Bind the local socket */
saddr.sin_family = AF_INET;
saddr.sin_port = INADDR_ANY;
saddr.sin_addr.s_addr = 0;
if (bind(loFds[i], (struct sockaddr *) &saddr, sizeof(saddr)) < 0) {
close(loFds[i]);
close(reFds[i]);
if (bind(loFds[i], (struct sockaddr *) &saddr, sizeof(saddr)) == SOCKET_ERROR) {
closesocket(loFds[i]);
closesocket(reFds[i]);
reClosed[i] = 1;
loClosed[i] = 1;
coClosed[i] = 1;
@ -1170,6 +1262,7 @@ void openLocalFd(int se, int i)
saddr.sin_family = AF_INET;
memcpy(&saddr.sin_addr, &seLocalAddrs[se], sizeof(struct in_addr));
saddr.sin_port = seLocalPorts[se];
#ifndef WIN32
#ifdef LINUX
j = 0;
setsockopt(loFds[i], SOL_SOCKET, SO_LINGER, &j, sizeof(j));
@ -1177,15 +1270,18 @@ void openLocalFd(int se, int i)
j = 1024;
setsockopt(loFds[i], SOL_SOCKET, SO_SNDBUF, &j, sizeof(j));
#endif /* LINUX */
#endif /* WIN32 */
j = 1;
fcntl(loFds[i], F_SETFL, O_NONBLOCK);
ioctlsocket(loFds[i], FIONBIO, &j);
if (connect(loFds[i], (struct sockaddr *)&saddr,
sizeof(struct sockaddr_in)) < 0)
sizeof(struct sockaddr_in)) == INVALID_SOCKET)
{
if (errno != EINPROGRESS) {
if ((GetLastError() != WSAEINPROGRESS) &&
(GetLastError() != WSAEWOULDBLOCK))
{
PERROR("rinetd: connect");
close(loFds[i]);
close(reFds[i]);
closesocket(loFds[i]);
closesocket(reFds[i]);
reClosed[i] = 1;
loClosed[i] = 1;
coClosed[i] = 1;
@ -1223,6 +1319,7 @@ int getAddress(char *host, struct in_addr *iaddr)
}
}
#ifndef WIN32
void plumber(int s)
{
/* Just reinstall */
@ -1236,6 +1333,7 @@ void hup(int s)
/* And reinstall the signal handler */
signal(SIGHUP, hup);
}
#endif /* WIN32 */
int safeRealloc(void **data, int oldsize, int newsize)
{
@ -1406,6 +1504,7 @@ int readArgs (int argc,
exit (1);
}
}
return 0;
}
/* get_gmtoff was borrowed from Apache. Thanks folks. */
@ -1443,7 +1542,7 @@ int patternBad(char *pattern)
void refuse(int index, int logCode)
{
close(reFds[index]);
closesocket(reFds[index]);
reClosed[index] = 1;
loClosed[index] = 1;
coClosed[index] = 1;

97
rinetd.dsp Normal file
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@ -0,0 +1,97 @@
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