1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _LINUX_SOCKET_H
3#define _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
10typedef unsigned short __kernel_sa_family_t;
11
12/*
13 * The definition uses anonymous union and struct in order to control the
14 * default alignment.
15 */
16struct __kernel_sockaddr_storage {
17 union {
18 struct {
19 __kernel_sa_family_t ss_family; /* address family */
20 /* Following field(s) are implementation specific */
21 char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
22 /* space to achieve desired size, */
23 /* _SS_MAXSIZE value minus size of ss_family */
24 };
25 void *__align; /* implementation specific desired alignment */
26 };
27};
28
29#endif /* _LINUX_SOCKET_H */
30

source code of include/linux/socket.h