sysdeps/unix/sysv/linux/socketcall.h

   1 /* ID for functions called via socketcall system call.
   2    Copyright (C) 1995-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SYS_SOCKETCALL_H
  20 #define _SYS_SOCKETCALL_H       1
  21
  22 #include <sysdep.h>
  23
  24 /* Define unique numbers for the operations permitted on socket.  Linux
  25    uses a single system call for all these functions.  The relevant code
  26    file is /usr/include/linux/net.h.
  27    We cannot use an enum here because the values are used in assembler
  28    code.  */
  29
  30 #define SOCKOP_invalid          -1
  31 #define SOCKOP_socket           1
  32 #define SOCKOP_bind             2
  33 #define SOCKOP_connect          3
  34 #define SOCKOP_listen           4
  35 #define SOCKOP_accept           5
  36 #define SOCKOP_getsockname      6
  37 #define SOCKOP_getpeername      7
  38 #define SOCKOP_socketpair       8
  39 #define SOCKOP_send             9
  40 #define SOCKOP_recv             10
  41 #define SOCKOP_sendto           11
  42 #define SOCKOP_recvfrom         12
  43 #define SOCKOP_shutdown         13
  44 #define SOCKOP_setsockopt       14
  45 #define SOCKOP_getsockopt       15
  46 #define SOCKOP_sendmsg          16
  47 #define SOCKOP_recvmsg          17
  48 #define SOCKOP_accept4          18
  49 #define SOCKOP_recvmmsg         19
  50 #define SOCKOP_sendmmsg         20
  51
  52 #define __SOCKETCALL1(name, a1) \
  53   INLINE_SYSCALL (socketcall, 2, name, \
  54      ((long int [1]) { (long int) (a1) }))
  55 #define __SOCKETCALL2(name, a1, a2) \
  56   INLINE_SYSCALL (socketcall, 2, name, \
  57      ((long int [2]) { (long int) (a1), (long int) (a2) }))
  58 #define __SOCKETCALL3(name, a1, a2, a3) \
  59   INLINE_SYSCALL (socketcall, 2, name, \
  60      ((long int [3]) { (long int) (a1), (long int) (a2), (long int) (a3) }))
  61 #define __SOCKETCALL4(name, a1, a2, a3, a4) \
  62   INLINE_SYSCALL (socketcall, 2, name, \
  63      ((long int [4]) { (long int) (a1), (long int) (a2), (long int) (a3), \
  64                        (long int) (a4) }))
  65 #define __SOCKETCALL5(name, a1, a2, a3, a4, a5) \
  66   INLINE_SYSCALL (socketcall, 2, name, \
  67      ((long int [5]) { (long int) (a1), (long int) (a2), (long int) (a3), \
  68                        (long int) (a4), (long int) (a5) }))
  69 #define __SOCKETCALL6(name, a1, a2, a3, a4, a5, a6) \
  70   INLINE_SYSCALL (socketcall, 2, name, \
  71      ((long int [6]) { (long int) (a1), (long int) (a2), (long int) (a3), \
  72                        (long int) (a4), (long int) (a5), (long int) (a6) }))
  73
  74 #define __SOCKETCALL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n
  75 #define __SOCKETCALL_NARGS(...) \
  76   __SOCKETCALL_NARGS_X (__VA_ARGS__,7,6,5,4,3,2,1,0,)
  77 #define __SOCKETCALL_CONCAT_X(a,b)     a##b
  78 #define __SOCKETCALL_CONCAT(a,b)       __SOCKETCALL_CONCAT_X (a, b)
  79 #define __SOCKETCALL_DISP(b,...) \
  80   __SOCKETCALL_CONCAT (b,__SOCKETCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
  81
  82 #define __SOCKETCALL(...) __SOCKETCALL_DISP (__SOCKETCALL, __VA_ARGS__)
  83
  84
  85 #define SOCKETCALL(name, args...)                                       \
  86   ({                                                                    \
  87     long int sc_ret = __SOCKETCALL (SOCKOP_##name, args);               \
  88     sc_ret;                                                             \
  89   })
  90
  91
  92 #if IS_IN (libc)
  93 # define __pthread_enable_asynccancel  __libc_enable_asynccancel
  94 # define __pthread_disable_asynccancel __libc_disable_asynccancel
  95 #endif
  96
  97 #define SOCKETCALL_CANCEL(name, args...)                                \
  98   ({                                                                    \
  99     int oldtype = LIBC_CANCEL_ASYNC ();                                 \
 100     long int sc_ret = __SOCKETCALL (SOCKOP_##name, args);               \
 101     LIBC_CANCEL_RESET (oldtype);                                        \
 102     sc_ret;                                                             \
 103   })
 104
 105
 106 #endif /* sys/socketcall.h */