| Willy Tarreau | 1bc4aab | 2012-10-08 20:11:03 +0200 | [diff] [blame] | 1 | /* |
| 2 | * include/common/accept4.h |
| 3 | * Definition of the accept4 system call for older Linux libc. |
| 4 | * |
| 5 | * Copyright 2000-2012 Willy Tarreau <w@1wt.eu> |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation, version 2.1 |
| 10 | * exclusively. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with this library; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #ifndef _COMMON_ACCEPT4_H |
| 24 | #define _COMMON_ACCEPT4_H |
| 25 | |
| 26 | #if defined (__linux__) && defined(USE_ACCEPT4) |
| 27 | |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/socket.h> |
| 30 | #include <sys/syscall.h> |
| 31 | #include <errno.h> |
| 32 | #include <fcntl.h> |
| 33 | #include <unistd.h> |
| 34 | #include <common/syscall.h> |
| 35 | |
| 36 | /* On recent Linux kernels, the accept4() syscall may be used to avoid an fcntl() |
| 37 | * call to set O_NONBLOCK on the resulting socket. It was introduced in Linux |
| 38 | * 2.6.28 and is not present in older libcs. |
| 39 | */ |
| 40 | #ifndef SOCK_NONBLOCK |
| 41 | #define SOCK_NONBLOCK O_NONBLOCK |
| 42 | #endif |
| 43 | |
| 44 | #if defined(USE_MY_ACCEPT4) || !defined(SYS_ACCEPT4) |
| 45 | #if defined(CONFIG_HAP_LINUX_VSYSCALL) && defined(__linux__) && defined(__i386__) |
| 46 | /* The syscall is redefined somewhere else */ |
| 47 | extern int accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags); |
| 48 | #elif ACCEPT4_USE_SOCKETCALL |
| Willy Tarreau | 7fca87f | 2012-10-10 08:26:12 +0200 | [diff] [blame] | 49 | static inline _syscall2(int, socketcall, int, call, unsigned long *, args); |
| Willy Tarreau | 1bc4aab | 2012-10-08 20:11:03 +0200 | [diff] [blame] | 50 | static int accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags) |
| 51 | { |
| 52 | unsigned long args[4]; |
| Willy Tarreau | 1bc4aab | 2012-10-08 20:11:03 +0200 | [diff] [blame] | 53 | |
| 54 | args[0] = (unsigned long)sockfd; |
| 55 | args[1] = (unsigned long)addr; |
| 56 | args[2] = (unsigned long)addrlen; |
| 57 | args[3] = (unsigned long)flags; |
| 58 | return socketcall(SYS_ACCEPT4, args); |
| 59 | } |
| 60 | #else |
| 61 | static _syscall4(int, accept4, int, sockfd, struct sockaddr *, addr, socklen_t *, addrlen, int, flags); |
| 62 | #endif /* VSYSCALL etc... */ |
| 63 | #endif /* USE_MY_ACCEPT4 */ |
| 64 | #endif /* __linux__ && USE_ACCEPT4 */ |
| 65 | #endif /* _COMMON_ACCEPT4_H */ |
| 66 | |
| 67 | /* |
| 68 | * Local variables: |
| 69 | * c-indent-level: 8 |
| 70 | * c-basic-offset: 8 |
| 71 | * End: |
| 72 | */ |