/* * 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 #include #include #include /* This is needed on Linux for Netfilter includes */ #include #include #include #include #include #include /* 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 #include #include #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 #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 /* some backtrace() implementations are broken or incomplete, in this case we * can replace them. We must not do it all the time as some are more accurate * than ours. */ #ifdef USE_BACKTRACE #if defined(__aarch64__) /* on aarch64 at least from gcc-4.7.4 to 7.4.1 we only get a single entry, which * is pointless. Ours works though it misses the faulty function itself, * probably due to an alternate stack for the signal handler which does not * create a new frame hence doesn't store the caller's return address. */ #elif defined(__clang__) && defined(__x86_64__) /* this is on FreeBSD, clang 4.0 to 8.0 produce don't go further than the * sighandler. */ #else #define HA_HAVE_WORKING_BACKTRACE #endif #endif #endif /* _COMMON_COMPAT_H */ /* * Local variables: * c-indent-level: 8 * c-basic-offset: 8 * End: */