uapi/linux/socket.h

0001 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
0002 #ifndef _UAPI_LINUX_SOCKET_H
0003 #define _UAPI_LINUX_SOCKET_H
0004
0005 /*
0006  * Desired design of maximum size and alignment (see RFC2553)
0007  */
0008 #define _K_SS_MAXSIZE   128 /* Implementation specific max size */
0009
0010 typedef unsigned short __kernel_sa_family_t;
0011
0012 /*
0013  * The definition uses anonymous union and struct in order to control the
0014  * default alignment.
0015  */
0016 struct __kernel_sockaddr_storage {
0017     union {
0018         struct {
0019             __kernel_sa_family_t    ss_family; /* address family */
0020             /* Following field(s) are implementation specific */
0021             char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
0022                 /* space to achieve desired size, */
0023                 /* _SS_MAXSIZE value minus size of ss_family */
0024         };
0025         void *__align; /* implementation specific desired alignment */
0026     };
0027 };
0028
0029 #define SOCK_SNDBUF_LOCK    1
0030 #define SOCK_RCVBUF_LOCK    2
0031
0032 #define SOCK_BUF_LOCK_MASK (SOCK_SNDBUF_LOCK | SOCK_RCVBUF_LOCK)
0033
0034 #define SOCK_TXREHASH_DEFAULT   255
0035 #define SOCK_TXREHASH_DISABLED  0
0036 #define SOCK_TXREHASH_ENABLED   1
0037
0038 #endif /* _UAPI_LINUX_SOCKET_H */