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SSLproxy/nat.h

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Update with SSLsplit 0.5.2 and develop branch changes as of 270218
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/*-
Update copyright, license and tagline - Update copyright to 2015 - Remove the non-standard "unmodified" from the 2-clause BSD license - Remove scalable from the tagline to avoid misinterpretations
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* SSLsplit - transparent SSL/TLS interception
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* https://www.roe.ch/SSLsplit
*
* Copyright (c) 2009-2018, Daniel Roethlisberger <daniel@roe.ch>.
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* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
Update with SSLsplit 0.5.2 and develop branch changes as of 270218
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* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
Initial import of sslsplit-0.4.2
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*
Update with SSLsplit 0.5.2 and develop branch changes as of 270218
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
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*/
#ifndef NAT_H
#define NAT_H
Use WUNRES and MALLOC attribs and fix sloppy code
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#include "attrib.h"
Initial import of sslsplit-0.4.2
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#include <sys/types.h>
#include <sys/socket.h>
#include <event2/util.h>
Refactor process lookup out of NAT engine code Local process lookup is independent of the NAT engine used, it depends only on the operating system's process enumeration API. Moving the code out of NAT lookup also makes it work for static and SNI proxyspecs.
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typedef int (*nat_lookup_cb_t)(struct sockaddr *, socklen_t *, evutil_socket_t,
Initial import of sslsplit-0.4.2
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struct sockaddr *, socklen_t);
typedef int (*nat_socket_cb_t)(evutil_socket_t);
Use WUNRES and MALLOC attribs and fix sloppy code
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int nat_exist(const char *) WUNRES;
Don't allow -u on Mac OS X with pf proxyspecs Apple checks EUID==0 on ioctl(/dev/pf), whereas OpenBSD and FreeBSD only check permissions on open(/dev/pf). This means that on OS X, it is not possible to open /dev/pf, drop privileges, and send an ioctl to the file descriptor opened earlier with EUID==0. It also means Apple broke the Unix way of dealing with device nodes - why are there file permissions on /dev/pf when they later enforce EUID==0 on use, thereby breaking basic Unix mechanisms? Work around this by disallowing -u with pf proxyspecs and by not automatically dropping to nobody on Mac OS X. Issue: #65 Reported by: Vladimir Marteev
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int nat_used(const char *) WUNRES;
Use WUNRES and MALLOC attribs and fix sloppy code
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nat_lookup_cb_t nat_getlookupcb(const char *) WUNRES;
nat_socket_cb_t nat_getsocketcb(const char *) WUNRES;
int nat_ipv6ready(const char *) WUNRES;
Initial import of sslsplit-0.4.2
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Use WUNRES and MALLOC attribs and fix sloppy code
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const char *nat_getdefaultname(void) WUNRES;
Initial import of sslsplit-0.4.2
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void nat_list_engines(void);
Use WUNRES and MALLOC attribs and fix sloppy code
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int nat_preinit(void) WUNRES;
Introduce privilege separation architecture Fork into a monitor parent process and an actual proxy child process, communicating over AF_UNIX sockets. Certain privileged operations are performed through the privileged parent process, like opening log files or listener sockets, while all other operations happen in the child process, which can now drop its privileges without side-effects for log file opening and other privileged operations. This is also a preparation for -l/-L logfile reopening through SIGUSR1. This means that -S and -F are no longer relative to chroot() if used with -j. This is a deliberate POLA violation.
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void nat_preinit_undo(void);
Use WUNRES and MALLOC attribs and fix sloppy code
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int nat_init(void) WUNRES;
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void nat_fini(void);
void nat_version(void);
#endif /* !NAT_H */
/* vim: set noet ft=c: */
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