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 
10 typedef 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  */
16 struct __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 #define SOCK_SNDBUF_LOCK	1
30 #define SOCK_RCVBUF_LOCK	2
31 
32 #define SOCK_BUF_LOCK_MASK (SOCK_SNDBUF_LOCK | SOCK_RCVBUF_LOCK)
33 
34 #define SOCK_TXREHASH_DEFAULT	255
35 #define SOCK_TXREHASH_DISABLED	0
36 #define SOCK_TXREHASH_ENABLED	1
37 
38 #endif /* _UAPI_LINUX_SOCKET_H */
39