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268 lines
6.9 KiB
C
268 lines
6.9 KiB
C
/*
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* Copyright (c) 2012 Tristan Le Guern <leguern AT medu DOT se>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* Copyright (c) 2016 Mahdi Mokhtari <mokhi64@gmail.com>
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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 the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#if defined Windows
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#else /* Unix */
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#include <sys/socket.h>
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#endif
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#if !defined Windows /* Unix :) */
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#if !defined Linux
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#include <netinet/in.h>
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#endif
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#if defined(Linux)
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// Once we drop xenial support we can just include net/if.h on linux
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#include <linux/if.h>
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#else
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#include <net/if.h>
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#endif
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#if defined Linux
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#include <netinet/in.h>
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#elif defined(iOS)
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#include <net/ethernet.h>
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#else
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#include <netinet/if_ether.h>
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#endif
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#endif
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#include <stdint.h>
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#ifndef LIBTUNTAP_H_
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#define LIBTUNTAP_H_
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#if defined IFNAMSIZ && !defined IF_NAMESIZE
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#define IF_NAMESIZE IFNAMSIZ /* Historical BSD name */
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#elif !defined IF_NAMESIZE
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#define IF_NAMESIZE 16
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#endif
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#define IF_DESCRSIZE 50 /* XXX: Tests needed on NetBSD and OpenBSD */
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#if defined TUNSETDEBUG
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#define TUNSDEBUG TUNSETDEBUG
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#endif
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#if defined Windows
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#define TUNFD_INVALID_VALUE INVALID_HANDLE_VALUE
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#else /* Unix */
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#define TUNFD_INVALID_VALUE -1
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#endif
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/*
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* Uniformize types
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* - t_tun: tun device file descriptor
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* - t_tun_in_addr: struct in_addr/IN_ADDR
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* - t_tun_in6_addr: struct in6_addr/IN6_ADDR
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*/
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#if defined Windows
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#include <windows.h>
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#include <in6addr.h>
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#include <winsock2.h>
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typedef HANDLE t_tun;
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typedef IN_ADDR t_tun_in_addr;
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typedef IN6_ADDR t_tun_in6_addr;
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#else /* Unix */
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typedef int t_tun;
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typedef struct in_addr t_tun_in_addr;
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typedef struct in6_addr t_tun_in6_addr;
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#endif
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/*
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* Windows helpers
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*/
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#if defined Windows
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//#define strncat(x, y, z) strncat_s((x), _countof(x), (y), (z));
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#define strdup(x) _strdup(x)
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#endif
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#define TUNTAP_ID_MAX 256
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#define TUNTAP_ID_ANY 257
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#define TUNTAP_MODE_ETHERNET 0x0001
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#define TUNTAP_MODE_TUNNEL 0x0002
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#define TUNTAP_MODE_PERSIST 0x0004
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#define TUNTAP_LOG_NONE 0x0000
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#define TUNTAP_LOG_DEBUG 0x0001
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#define TUNTAP_LOG_INFO 0x0002
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#define TUNTAP_LOG_NOTICE 0x0004
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#define TUNTAP_LOG_WARN 0x0008
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#define TUNTAP_LOG_ERR 0x0016
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/* Versioning: 0xMMmm, with 'M' for major and 'm' for minor */
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#define TUNTAP_VERSION_MAJOR 0
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#define TUNTAP_VERSION_MINOR 3
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#define TUNTAP_VERSION ((TUNTAP_VERSION_MAJOR << 8) | TUNTAP_VERSION_MINOR)
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#define TUNTAP_GET_FD(x) (x)->tun_fd
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/* Handle Windows symbols export */
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#if defined Windows
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#if defined(tuntap_EXPORTS) && defined(_USRDLL) /* CMake generated goo */
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#define TUNTAP_EXPORT __declspec(dllexport)
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#elif defined(tuntap_EXPORTS)
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#define TUNTAP_EXPORT __declspec(dllimport)
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#else
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#define TUNTAP_EXPORT extern
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#endif
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#else /* Unix */
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#define TUNTAP_EXPORT extern
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#endif
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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struct device
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{
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/** set me on ios and android to block on a promise for the fd */
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int (*obtain_fd)(struct device*);
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/** user data */
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void* user;
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t_tun tun_fd;
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int ctrl_sock;
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int flags; /* ifr.ifr_flags on Unix */
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char if_name[IF_NAMESIZE];
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#if defined(Windows)
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int idx; /* needed to set ipv6 address */
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DWORD bindaddr; /* set DNS client address */
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#endif
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#if defined(FreeBSD)
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int mode;
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#endif
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#if defined(__sun)
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int ip_fd;
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int reserved;
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char internal_name[IF_NAMESIZE];
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#endif
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};
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/* User definable log callback */
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typedef void (*t_tuntap_log)(int, int, const char*, const char*);
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TUNTAP_EXPORT t_tuntap_log __tuntap_log;
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#ifndef LOG_TAG
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#define LOG_TAG "tuntap"
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#endif
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#define tuntap_log(lvl, msg) __tuntap_log(lvl, __LINE__, LOG_TAG, msg)
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/* Portable "public" functions */
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TUNTAP_EXPORT struct device*
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tuntap_init(void);
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TUNTAP_EXPORT int
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tuntap_version(void);
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TUNTAP_EXPORT void
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tuntap_destroy(struct device*);
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TUNTAP_EXPORT void
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tuntap_release(struct device*);
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TUNTAP_EXPORT int
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tuntap_start(struct device*, int, int);
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TUNTAP_EXPORT char*
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tuntap_get_ifname(struct device*);
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TUNTAP_EXPORT int
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tuntap_set_ifname(struct device*, const char*);
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TUNTAP_EXPORT int
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tuntap_set_descr(struct device*, const char*);
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TUNTAP_EXPORT int
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tuntap_up(struct device*);
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TUNTAP_EXPORT int
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tuntap_down(struct device*);
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TUNTAP_EXPORT int
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tuntap_get_mtu(struct device*);
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TUNTAP_EXPORT int
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tuntap_set_mtu(struct device*, int);
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/** set ip address and netmask
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*/
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TUNTAP_EXPORT int
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tuntap_set_ip(struct device*, const char* srcaddr, const char* dstaddr, int netmask);
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// TUNTAP_EXPORT int tuntap_set_ip_old(struct device *, const char
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// *, int);
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/*TUNTAP_EXPORT int tuntap_set_ip_old(struct device *, const char
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* *, int);*/
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TUNTAP_EXPORT int
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tuntap_read(struct device*, void*, size_t);
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TUNTAP_EXPORT int
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tuntap_write(struct device*, void*, size_t);
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TUNTAP_EXPORT int
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tuntap_get_readable(struct device*);
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TUNTAP_EXPORT int
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tuntap_set_nonblocking(struct device* dev, int);
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TUNTAP_EXPORT int
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tuntap_set_debug(struct device* dev, int);
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/* Logging functions */
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TUNTAP_EXPORT void
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tuntap_log_set_cb(t_tuntap_log cb);
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void
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tuntap_log_default(int, int, const char*, const char*);
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void
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tuntap_log_hexdump(void*, size_t);
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void
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tuntap_log_chksum(void*, int);
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/* OS specific functions */
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int
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tuntap_sys_start(struct device*, int, int);
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void
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tuntap_sys_destroy(struct device*);
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int
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tuntap_sys_set_ipv4(struct device*, t_tun_in_addr*, uint32_t);
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#if defined(Windows)
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int
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tuntap_sys_set_dns(struct device* dev, t_tun_in_addr* s, uint32_t mask);
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#endif
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#if defined(FreeBSD)
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int
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tuntap_sys_set_ipv4_tap(struct device*, t_tun_in_addr*, uint32_t);
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int
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tuntap_sys_set_ipv4_tun(
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struct device* dev, t_tun_in_addr* s4, t_tun_in_addr* s4dest, uint32_t bits, int netmask);
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#endif
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int
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tuntap_sys_set_ipv6(struct device*, t_tun_in6_addr*, uint32_t);
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int
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tuntap_sys_set_ifname(struct device*, const char*, size_t);
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int
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tuntap_sys_set_descr(struct device*, const char*, size_t);
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#ifdef __cplusplus
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}
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#endif
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#endif
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