2 * NET An implementation of the SOCKET network access protocol.
3 * This is the master header file for the Linux NET layer,
4 * or, in plain English: the networking handling part of the
7 * Version: @(#)net.h 1.0.3 05/25/93
9 * Authors: Orest Zborowski, <obz@Kodak.COM>
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
21 #include <linux/socket.h>
22 #include <asm/socket.h>
26 #define SYS_SOCKET 1 /* sys_socket(2) */
27 #define SYS_BIND 2 /* sys_bind(2) */
28 #define SYS_CONNECT 3 /* sys_connect(2) */
29 #define SYS_LISTEN 4 /* sys_listen(2) */
30 #define SYS_ACCEPT 5 /* sys_accept(2) */
31 #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
32 #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
33 #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
34 #define SYS_SEND 9 /* sys_send(2) */
35 #define SYS_RECV 10 /* sys_recv(2) */
36 #define SYS_SENDTO 11 /* sys_sendto(2) */
37 #define SYS_RECVFROM 12 /* sys_recvfrom(2) */
38 #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
39 #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
40 #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
41 #define SYS_SENDMSG 16 /* sys_sendmsg(2) */
42 #define SYS_RECVMSG 17 /* sys_recvmsg(2) */
43 #define SYS_ACCEPT4 18 /* sys_accept4(2) */
44 #define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */
47 SS_FREE = 0, /* not allocated */
48 SS_UNCONNECTED, /* unconnected to any socket */
49 SS_CONNECTING, /* in process of connecting */
50 SS_CONNECTED, /* connected to socket */
51 SS_DISCONNECTING /* in process of disconnecting */
54 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */
57 #include <linux/stringify.h>
58 #include <linux/random.h>
59 #include <linux/wait.h>
60 #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
61 #include <linux/kmemcheck.h>
62 #include <linux/rcupdate.h>
64 struct poll_table_struct;
65 struct pipe_inode_info;
69 #define SOCK_ASYNC_NOSPACE 0
70 #define SOCK_ASYNC_WAITDATA 1
71 #define SOCK_NOSPACE 2
72 #define SOCK_PASSCRED 3
73 #define SOCK_PASSSEC 4
75 #ifndef ARCH_HAS_SOCKET_TYPES
77 * enum sock_type - Socket types
78 * @SOCK_STREAM: stream (connection) socket
79 * @SOCK_DGRAM: datagram (conn.less) socket
80 * @SOCK_RAW: raw socket
81 * @SOCK_RDM: reliably-delivered message
82 * @SOCK_SEQPACKET: sequential packet socket
83 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
84 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
85 * For writing rarp and other similar things on the user level.
87 * When adding some new socket type please
88 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
89 * overrides this enum for binary compat reasons.
101 #define SOCK_MAX (SOCK_PACKET + 1)
102 /* Mask which covers at least up to SOCK_MASK-1. The
103 * remaining bits are used as flags. */
104 #define SOCK_TYPE_MASK 0xf
106 /* Flags for socket, socketpair, accept4 */
107 #define SOCK_CLOEXEC O_CLOEXEC
108 #ifndef SOCK_NONBLOCK
109 #define SOCK_NONBLOCK O_NONBLOCK
112 #endif /* ARCH_HAS_SOCKET_TYPES */
114 enum sock_shutdown_cmd {
121 wait_queue_head_t wait;
122 struct fasync_struct *fasync_list;
124 } ____cacheline_aligned_in_smp;
127 * struct socket - general BSD socket
128 * @state: socket state (%SS_CONNECTED, etc)
129 * @type: socket type (%SOCK_STREAM, etc)
130 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
131 * @ops: protocol specific socket operations
132 * @file: File back pointer for gc
133 * @sk: internal networking protocol agnostic socket representation
134 * @wq: wait queue for several uses
139 kmemcheck_bitfield_begin(type);
141 kmemcheck_bitfield_end(type);
145 struct socket_wq *wq;
149 const struct proto_ops *ops;
152 struct vm_area_struct;
161 struct module *owner;
162 int (*release) (struct socket *sock);
163 int (*bind) (struct socket *sock,
164 struct sockaddr *myaddr,
166 int (*connect) (struct socket *sock,
167 struct sockaddr *vaddr,
168 int sockaddr_len, int flags);
169 int (*socketpair)(struct socket *sock1,
170 struct socket *sock2);
171 int (*accept) (struct socket *sock,
172 struct socket *newsock, int flags);
173 int (*getname) (struct socket *sock,
174 struct sockaddr *addr,
175 int *sockaddr_len, int peer);
176 unsigned int (*poll) (struct file *file, struct socket *sock,
177 struct poll_table_struct *wait);
178 int (*ioctl) (struct socket *sock, unsigned int cmd,
181 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
184 int (*listen) (struct socket *sock, int len);
185 int (*shutdown) (struct socket *sock, int flags);
186 int (*setsockopt)(struct socket *sock, int level,
187 int optname, char __user *optval, unsigned int optlen);
188 int (*getsockopt)(struct socket *sock, int level,
189 int optname, char __user *optval, int __user *optlen);
191 int (*compat_setsockopt)(struct socket *sock, int level,
192 int optname, char __user *optval, unsigned int optlen);
193 int (*compat_getsockopt)(struct socket *sock, int level,
194 int optname, char __user *optval, int __user *optlen);
196 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
197 struct msghdr *m, size_t total_len);
198 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
199 struct msghdr *m, size_t total_len,
201 int (*mmap) (struct file *file, struct socket *sock,
202 struct vm_area_struct * vma);
203 ssize_t (*sendpage) (struct socket *sock, struct page *page,
204 int offset, size_t size, int flags);
205 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
206 struct pipe_inode_info *pipe, size_t len, unsigned int flags);
209 #define DECLARE_SOCKADDR(type, dst, src) \
210 type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
212 struct net_proto_family {
214 int (*create)(struct net *net, struct socket *sock,
215 int protocol, int kern);
216 struct module *owner;
229 extern int sock_wake_async(struct socket *sk, int how, int band);
230 extern int sock_register(const struct net_proto_family *fam);
231 extern void sock_unregister(int family);
232 extern int __sock_create(struct net *net, int family, int type, int proto,
233 struct socket **res, int kern);
234 extern int sock_create(int family, int type, int proto,
235 struct socket **res);
236 extern int sock_create_kern(int family, int type, int proto,
237 struct socket **res);
238 extern int sock_create_lite(int family, int type, int proto,
239 struct socket **res);
240 extern void sock_release(struct socket *sock);
241 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
243 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
244 size_t size, int flags);
245 extern int sock_map_fd(struct socket *sock, int flags);
246 extern struct socket *sockfd_lookup(int fd, int *err);
247 #define sockfd_put(sock) fput(sock->file)
248 extern int net_ratelimit(void);
250 #define net_random() random32()
251 #define net_srandom(seed) srandom32((__force u32)seed)
253 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
254 struct kvec *vec, size_t num, size_t len);
255 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
256 struct kvec *vec, size_t num,
257 size_t len, int flags);
259 extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
261 extern int kernel_listen(struct socket *sock, int backlog);
262 extern int kernel_accept(struct socket *sock, struct socket **newsock,
264 extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
265 int addrlen, int flags);
266 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
268 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
270 extern int kernel_getsockopt(struct socket *sock, int level, int optname,
271 char *optval, int *optlen);
272 extern int kernel_setsockopt(struct socket *sock, int level, int optname,
273 char *optval, unsigned int optlen);
274 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
275 size_t size, int flags);
276 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
277 extern int kernel_sock_shutdown(struct socket *sock,
278 enum sock_shutdown_cmd how);
280 #define MODULE_ALIAS_NETPROTO(proto) \
281 MODULE_ALIAS("net-pf-" __stringify(proto))
283 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
284 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
286 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
287 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
288 "-type-" __stringify(type))
291 #include <linux/sysctl.h>
292 #include <linux/ratelimit.h>
293 extern struct ratelimit_state net_ratelimit_state;
296 #endif /* __KERNEL__ */
297 #endif /* _LINUX_NET_H */