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haproxy/include/common/compat.h
Willy Tarreau f4c1e56b5e BUILD: signals: FreeBSD has SI_LWP instead of SI_TKILL 
SI_TKILL is for Linux. We're again in the non-portable area. Both OSes
use macros to define these values so we can #ifdef them. Let's make
SI_TKILL defined based on SI_LWP when only the latter is defined.
2019-05-23 08:40:50 +02:00

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/*
* include/common/compat.h
* Operating system compatibility interface.
*
* Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _COMMON_COMPAT_H
#define _COMMON_COMPAT_H
#include <limits.h>
#include <signal.h>
#include <time.h>
#include <unistd.h>
/* This is needed on Linux for Netfilter includes */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
/* set any optional field in a struct to this type to save ifdefs. Its address
* will still be valid but it will not reserve any room nor require any
* initialization.
*/
typedef struct { } empty_t;
// Redefine some limits that are not present everywhere
#ifndef LLONG_MAX
# define LLONG_MAX 9223372036854775807LL
# define LLONG_MIN (-LLONG_MAX - 1LL)
#endif
#ifndef ULLONG_MAX
# define ULLONG_MAX (LLONG_MAX * 2ULL + 1)
#endif
#ifndef LONGBITS
#define LONGBITS ((unsigned int)sizeof(long) * 8)
#endif
#ifndef BITS_PER_INT
#define BITS_PER_INT (8*sizeof(int))
#endif
/* this is for libc5 for example */
#ifndef TCP_NODELAY
#define TCP_NODELAY 1
#endif
#ifndef SHUT_RD
#define SHUT_RD 0
#endif
#ifndef SHUT_WR
#define SHUT_WR 1
#endif
/* only Linux defines it */
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif
/* AIX does not define MSG_DONTWAIT. We'll define it to zero, and test it
* wherever appropriate.
*/
#ifndef MSG_DONTWAIT
#define MSG_DONTWAIT 0
#endif
/* Only Linux defines MSG_MORE */
#ifndef MSG_MORE
#define MSG_MORE 0
#endif
/* On Linux 2.4 and above, MSG_TRUNC can be used on TCP sockets to drop any
* pending data. Let's rely on NETFILTER to detect if this is supported.
*/
#ifdef USE_NETFILTER
#define MSG_TRUNC_CLEARS_INPUT
#endif
/* Maximum path length, OS-dependant */
#ifndef MAXPATHLEN
#define MAXPATHLEN 128
#endif
/* On Linux, allows pipes to be resized */
#ifndef F_SETPIPE_SZ
#define F_SETPIPE_SZ (1024 + 7)
#endif
/* On FreeBSD we don't have SI_TKILL but SI_LWP instead */
#if !defined(SI_TKILL) && defined(SI_LWP)
#define SI_TKILL SI_LWP
#endif
/* systems without such defines do not know clockid_t or timer_t */
#if !(_POSIX_TIMERS > 0)
#undef clockid_t
#define clockid_t empty_t
#undef timer_t
#define timer_t empty_t
#endif
/* define a dummy value to designate "no timer". Use only 32 bits. */
#ifndef TIMER_INVALID
#define TIMER_INVALID ((timer_t)(unsigned long)(0xfffffffful))
#endif
#if defined(USE_TPROXY) && defined(USE_NETFILTER)
#include <linux/types.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter_ipv4.h>
#endif
/* On Linux, IP_TRANSPARENT and/or IP_FREEBIND generally require a kernel patch */
#if defined(USE_LINUX_TPROXY)
#if !defined(IP_FREEBIND)
#define IP_FREEBIND 15
#endif /* !IP_FREEBIND */
#if !defined(IP_TRANSPARENT)
#define IP_TRANSPARENT 19
#endif /* !IP_TRANSPARENT */
#if !defined(IPV6_TRANSPARENT)
#define IPV6_TRANSPARENT 75
#endif /* !IPV6_TRANSPARENT */
#endif /* USE_LINUX_TPROXY */
#if defined(IP_FREEBIND) \
|| defined(IP_BINDANY) \
|| defined(IPV6_BINDANY) \
|| defined(SO_BINDANY) \
|| defined(IP_TRANSPARENT) \
|| defined(IPV6_TRANSPARENT)
#define CONFIG_HAP_TRANSPARENT
#endif
/* We'll try to enable SO_REUSEPORT on Linux 2.4 and 2.6 if not defined.
* There are two families of values depending on the architecture. Those
* are at least valid on Linux 2.4 and 2.6, reason why we'll rely on the
* USE_NETFILTER define.
*/
#if !defined(SO_REUSEPORT) && defined(USE_NETFILTER)
#if (SO_REUSEADDR == 2)
#define SO_REUSEPORT 15
#elif (SO_REUSEADDR == 0x0004)
#define SO_REUSEPORT 0x0200
#endif /* SO_REUSEADDR */
#endif /* SO_REUSEPORT */
/* only Linux defines TCP_FASTOPEN */
#ifdef USE_TFO
#ifndef TCP_FASTOPEN
#define TCP_FASTOPEN 23
#endif
#ifndef TCP_FASTOPEN_CONNECT
#define TCP_FASTOPEN_CONNECT 30
#endif
#endif
/* FreeBSD doesn't define SOL_IP and prefers IPPROTO_IP */
#ifndef SOL_IP
#define SOL_IP IPPROTO_IP
#endif
/* same for SOL_TCP */
#ifndef SOL_TCP
#define SOL_TCP IPPROTO_TCP
#endif
/* If IPv6 is supported, define IN6_IS_ADDR_V4MAPPED() if missing. */
#if defined(IPV6_TCLASS) && !defined(IN6_IS_ADDR_V4MAPPED)
#define IN6_IS_ADDR_V4MAPPED(a) \
((((const uint32_t *) (a))[0] == 0) \
&& (((const uint32_t *) (a))[1] == 0) \
&& (((const uint32_t *) (a))[2] == htonl (0xffff)))
#endif
#if defined(__dietlibc__)
#include <strings.h>
#endif
/* crypt_r() has been present in glibc since 2.2 and on FreeBSD since 12.0
* (12000002). No other OS makes any mention of it for now. Feel free to add
* valid known combinations below if needed to relax the crypt() lock when
* using threads.
*/
#if (defined(__GNU_LIBRARY__) && (__GLIBC__ > 2 || __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)) \
|| (defined(__FreeBSD__) && __FreeBSD_version >= 1200002)
#define HA_HAVE_CRYPT_R
#endif
#endif /* _COMMON_COMPAT_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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