root/include/uapi/linux/socket.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_SOCKET_H
#define _UAPI_LINUX_SOCKET_H

/*
 * Desired design of maximum size and alignment (see RFC2553)
 */
#define _K_SS_MAXSIZE   128     /* Implementation specific max size */

typedef unsigned short __kernel_sa_family_t;

/*
 * The definition uses anonymous union and struct in order to control the
 * default alignment.
 */
struct __kernel_sockaddr_storage {
        union {
                struct {
                        __kernel_sa_family_t    ss_family; /* address family */
                        /* Following field(s) are implementation specific */
                        char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
                                /* space to achieve desired size, */
                                /* _SS_MAXSIZE value minus size of ss_family */
                };
                void *__align; /* implementation specific desired alignment */
        };
};

#define SOCK_SNDBUF_LOCK        1
#define SOCK_RCVBUF_LOCK        2

#define SOCK_BUF_LOCK_MASK (SOCK_SNDBUF_LOCK | SOCK_RCVBUF_LOCK)

#define SOCK_TXREHASH_DEFAULT   255
#define SOCK_TXREHASH_DISABLED  0
#define SOCK_TXREHASH_ENABLED   1

#endif /* _UAPI_LINUX_SOCKET_H */