--- /dev/null
+/*
+ have.h -- include headers which are known to exist
+ Copyright (C) 1998-2005 Ivo Timmermans
+ 2003-2012 Guus Sliepen <guus@tinc-vpn.org>
+
+ 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 of the License, 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, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef __TINC_HAVE_H__
+#define __TINC_HAVE_H__
+
+#ifdef HAVE_MINGW
+#ifdef WITH_WINDOWS2000
+#define WINVER Windows2000
+#else
+#define WINVER WindowsXP
+#endif
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef HAVE_MINGW
+#include <w32api.h>
+#include <winsock2.h>
+#include <windows.h>
+#include <ws2tcpip.h>
+#endif
+
+#ifdef HAVE_STDBOOL_H
+#include <stdbool.h>
+#endif
+
+#ifdef HAVE_TERMIOS_H
+#include <termios.h>
+#endif
+
+#ifdef HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+
+/* Include system specific headers */
+
+#ifdef HAVE_SYSLOG_H
+#include <syslog.h>
+#endif
+
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+
+#ifdef HAVE_SYS_FILE_H
+#include <sys/file.h>
+#endif
+
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+
+#ifdef HAVE_SYS_UIO_H
+#include <sys/uio.h>
+#endif
+
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+
+/* SunOS really wants sys/socket.h BEFORE net/if.h,
+ and FreeBSD wants these lines below the rest. */
+
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+
+#ifdef HAVE_NET_IF_TYPES_H
+#include <net/if_types.h>
+#endif
+
+#ifdef HAVE_NET_IF_TUN_H
+#include <net/if_tun.h>
+#endif
+
+#ifdef HAVE_NET_TUN_IF_TUN_H
+#include <net/tun/if_tun.h>
+#endif
+
+#ifdef HAVE_NET_IF_TAP_H
+#include <net/if_tap.h>
+#endif
+
+#ifdef HAVE_NET_TAP_IF_TAP_H
+#include <net/tap/if_tap.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_SYSTM_H
+#include <netinet/in_systm.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+
+#ifdef HAVE_NETINET_IP_H
+#include <netinet/ip.h>
+#endif
+
+#ifdef HAVE_NETINET_TCP_H
+#include <netinet/tcp.h>
+#endif
+
+#ifdef HAVE_NETINET_IN6_H
+#include <netinet/in6.h>
+#endif
+
+#ifdef HAVE_NETINET_IP6_H
+#include <netinet/ip6.h>
+#endif
+
+#ifdef HAVE_NET_ETHERNET_H
+#include <net/ethernet.h>
+#endif
+
+#ifdef HAVE_NET_IF_ARP_H
+#include <net/if_arp.h>
+#endif
+
+#ifdef HAVE_NETINET_IP_ICMP_H
+#include <netinet/ip_icmp.h>
+#endif
+
+#ifdef HAVE_NETINET_ICMP6_H
+#include <netinet/icmp6.h>
+#endif
+
+#ifdef HAVE_NETINET_IF_ETHER_H
+#include <netinet/if_ether.h>
+#endif
+
+#ifdef HAVE_MINGW
+#define SLASH "\\"
+#else
+#define SLASH "/"
+#endif
+
+#endif /* __TINC_SYSTEM_H__ */