include/uapi/linux/socket.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI_LINUX_SOCKET_H
   3 #define _UAPI_LINUX_SOCKET_H
   4
   5 /*
   6  * Desired design of maximum size and alignment (see RFC2553)
   7  */
   8 #define _K_SS_MAXSIZE   128     /* Implementation specific max size */
   9 #define _K_SS_ALIGNSIZE (__alignof__ (struct sockaddr *))
  10                                 /* Implementation specific desired alignment */
  11
  12 typedef unsigned short __kernel_sa_family_t;
  13
  14 struct __kernel_sockaddr_storage {
  15         __kernel_sa_family_t    ss_family;              /* address family */
  16         /* Following field(s) are implementation specific */
  17         char            __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
  18                                 /* space to achieve desired size, */
  19                                 /* _SS_MAXSIZE value minus size of ss_family */
  20 } __attribute__ ((aligned(_K_SS_ALIGNSIZE)));   /* force desired alignment */
  21
  22 #endif /* _UAPI_LINUX_SOCKET_H */