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natlook.h
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natlook.h
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/* ------------------------------------------------------------------------------------------------------------------ */
/* TS-Warp - Transparent proxy server and traffic wrapper */
/* ------------------------------------------------------------------------------------------------------------------ */
/*
* Copyright (c) 2021-2024, Mikhail Zakharov <zmey20000@yahoo.com>
*
* Redistribution and use in source and binary forms, with or without 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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.
*/
/*
* Copyright (c) 2001 Daniel Hartmeier
* Copyright (c) 2002 - 2013 Henning Brauer <henning@openbsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 HOLDERS 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.
*/
/* -- IP address NAT lookup structure definitions ------------------------------------------------------------------- */
#include <sys/socket.h>
#include <netinet/in.h>
#define PF_DEV "/dev/pf"
/* Structures defined in netpfil/pf/pf.h and net/pfvar.h for PF packet filer. */
enum { PF_INOUT, PF_IN, PF_OUT };
struct pf_addr {
union {
struct in_addr v4;
struct in6_addr v6;
u_int8_t addr8[16];
u_int16_t addr16[8];
u_int32_t addr32[4];
} pfa;
#define v4 pfa.v4
#define v6 pfa.v6
#define addr8 pfa.addr8
#define addr16 pfa.addr16
#define addr32 pfa.addr32
};
struct pfioc_natlook {
struct pf_addr saddr;
struct pf_addr daddr;
struct pf_addr rsaddr;
struct pf_addr rdaddr;
#if defined(__OpenBSD__)
u_int16_t rdomain;
u_int16_t rrdomain;
#endif
#if defined(__APPLE__)
union { u_int16_t sport; u_int32_t _f1; }; /* _f1 to _f5 are some Apple specific unused fields */
union { u_int16_t dport; u_int32_t _f2; };
union { u_int16_t rsport; u_int32_t _f3; };
union { u_int16_t rdport; u_int32_t _f4; };
#else
u_int16_t sport;
u_int16_t dport;
u_int16_t rsport;
u_int16_t rdport;
#endif
sa_family_t af;
u_int8_t proto;
#if defined(__APPLE__)
u_int8_t _f5;
#endif
u_int8_t direction;
};
#define DIOCNATLOOK _IOWR('D', 23, struct pfioc_natlook)
/* -- Function prototypes ------------------------------------------------------------------------------------------- */
int pf_open();
int pf_close(int pfd);
int nat_lookup(int pfd, struct sockaddr_storage *caddr, struct sockaddr_storage *iaddr, struct sockaddr_storage *daddr);