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/wait.h>
22 #include <linux/socket.h>
23 #include <linux/fcntl.h> /* For O_CLOEXEC */
24 #include <asm/socket.h>
26 struct poll_table_struct
;
27 struct pipe_inode_info
;
33 #define SYS_SOCKET 1 /* sys_socket(2) */
34 #define SYS_BIND 2 /* sys_bind(2) */
35 #define SYS_CONNECT 3 /* sys_connect(2) */
36 #define SYS_LISTEN 4 /* sys_listen(2) */
37 #define SYS_ACCEPT 5 /* sys_accept(2) */
38 #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
39 #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
40 #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
41 #define SYS_SEND 9 /* sys_send(2) */
42 #define SYS_RECV 10 /* sys_recv(2) */
43 #define SYS_SENDTO 11 /* sys_sendto(2) */
44 #define SYS_RECVFROM 12 /* sys_recvfrom(2) */
45 #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
46 #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
47 #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
48 #define SYS_SENDMSG 16 /* sys_sendmsg(2) */
49 #define SYS_RECVMSG 17 /* sys_recvmsg(2) */
50 #define SYS_PACCEPT 18 /* sys_paccept(2) */
53 SS_FREE
= 0, /* not allocated */
54 SS_UNCONNECTED
, /* unconnected to any socket */
55 SS_CONNECTING
, /* in process of connecting */
56 SS_CONNECTED
, /* connected to socket */
57 SS_DISCONNECTING
/* in process of disconnecting */
60 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */
63 #include <linux/stringify.h>
64 #include <linux/random.h>
66 #define SOCK_ASYNC_NOSPACE 0
67 #define SOCK_ASYNC_WAITDATA 1
68 #define SOCK_NOSPACE 2
69 #define SOCK_PASSCRED 3
70 #define SOCK_PASSSEC 4
72 #ifndef ARCH_HAS_SOCKET_TYPES
74 * enum sock_type - Socket types
75 * @SOCK_STREAM: stream (connection) socket
76 * @SOCK_DGRAM: datagram (conn.less) socket
77 * @SOCK_RAW: raw socket
78 * @SOCK_RDM: reliably-delivered message
79 * @SOCK_SEQPACKET: sequential packet socket
80 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
81 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
82 * For writing rarp and other similar things on the user level.
84 * When adding some new socket type please
85 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
86 * overrides this enum for binary compat reasons.
98 #define SOCK_MAX (SOCK_PACKET + 1)
99 /* Mask which covers at least up to SOCK_MASK-1. The
100 * remaining bits are used as flags. */
101 #define SOCK_TYPE_MASK 0xf
103 /* Flags for socket, socketpair, paccept */
104 #define SOCK_CLOEXEC O_CLOEXEC
106 #endif /* ARCH_HAS_SOCKET_TYPES */
108 enum sock_shutdown_cmd
{
115 * struct socket - general BSD socket
116 * @state: socket state (%SS_CONNECTED, etc)
117 * @type: socket type (%SOCK_STREAM, etc)
118 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
119 * @ops: protocol specific socket operations
120 * @fasync_list: Asynchronous wake up list
121 * @file: File back pointer for gc
122 * @sk: internal networking protocol agnostic socket representation
123 * @wait: wait queue for several uses
129 const struct proto_ops
*ops
;
130 struct fasync_struct
*fasync_list
;
133 wait_queue_head_t wait
;
136 struct vm_area_struct
;
145 struct module
*owner
;
146 int (*release
) (struct socket
*sock
);
147 int (*bind
) (struct socket
*sock
,
148 struct sockaddr
*myaddr
,
150 int (*connect
) (struct socket
*sock
,
151 struct sockaddr
*vaddr
,
152 int sockaddr_len
, int flags
);
153 int (*socketpair
)(struct socket
*sock1
,
154 struct socket
*sock2
);
155 int (*accept
) (struct socket
*sock
,
156 struct socket
*newsock
, int flags
);
157 int (*getname
) (struct socket
*sock
,
158 struct sockaddr
*addr
,
159 int *sockaddr_len
, int peer
);
160 unsigned int (*poll
) (struct file
*file
, struct socket
*sock
,
161 struct poll_table_struct
*wait
);
162 int (*ioctl
) (struct socket
*sock
, unsigned int cmd
,
164 int (*compat_ioctl
) (struct socket
*sock
, unsigned int cmd
,
166 int (*listen
) (struct socket
*sock
, int len
);
167 int (*shutdown
) (struct socket
*sock
, int flags
);
168 int (*setsockopt
)(struct socket
*sock
, int level
,
169 int optname
, char __user
*optval
, int optlen
);
170 int (*getsockopt
)(struct socket
*sock
, int level
,
171 int optname
, char __user
*optval
, int __user
*optlen
);
172 int (*compat_setsockopt
)(struct socket
*sock
, int level
,
173 int optname
, char __user
*optval
, int optlen
);
174 int (*compat_getsockopt
)(struct socket
*sock
, int level
,
175 int optname
, char __user
*optval
, int __user
*optlen
);
176 int (*sendmsg
) (struct kiocb
*iocb
, struct socket
*sock
,
177 struct msghdr
*m
, size_t total_len
);
178 int (*recvmsg
) (struct kiocb
*iocb
, struct socket
*sock
,
179 struct msghdr
*m
, size_t total_len
,
181 int (*mmap
) (struct file
*file
, struct socket
*sock
,
182 struct vm_area_struct
* vma
);
183 ssize_t (*sendpage
) (struct socket
*sock
, struct page
*page
,
184 int offset
, size_t size
, int flags
);
185 ssize_t (*splice_read
)(struct socket
*sock
, loff_t
*ppos
,
186 struct pipe_inode_info
*pipe
, size_t len
, unsigned int flags
);
189 struct net_proto_family
{
191 int (*create
)(struct net
*net
, struct socket
*sock
, int protocol
);
192 struct module
*owner
;
205 extern int sock_wake_async(struct socket
*sk
, int how
, int band
);
206 extern int sock_register(const struct net_proto_family
*fam
);
207 extern void sock_unregister(int family
);
208 extern int sock_create(int family
, int type
, int proto
,
209 struct socket
**res
);
210 extern int sock_create_kern(int family
, int type
, int proto
,
211 struct socket
**res
);
212 extern int sock_create_lite(int family
, int type
, int proto
,
213 struct socket
**res
);
214 extern void sock_release(struct socket
*sock
);
215 extern int sock_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
217 extern int sock_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
218 size_t size
, int flags
);
219 extern int sock_map_fd(struct socket
*sock
, int flags
);
220 extern struct socket
*sockfd_lookup(int fd
, int *err
);
221 #define sockfd_put(sock) fput(sock->file)
222 extern int net_ratelimit(void);
223 extern long do_accept(int fd
, struct sockaddr __user
*upeer_sockaddr
,
224 int __user
*upeer_addrlen
, int flags
);
226 #define net_random() random32()
227 #define net_srandom(seed) srandom32((__force u32)seed)
229 extern int kernel_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
230 struct kvec
*vec
, size_t num
, size_t len
);
231 extern int kernel_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
232 struct kvec
*vec
, size_t num
,
233 size_t len
, int flags
);
235 extern int kernel_bind(struct socket
*sock
, struct sockaddr
*addr
,
237 extern int kernel_listen(struct socket
*sock
, int backlog
);
238 extern int kernel_accept(struct socket
*sock
, struct socket
**newsock
,
240 extern int kernel_connect(struct socket
*sock
, struct sockaddr
*addr
,
241 int addrlen
, int flags
);
242 extern int kernel_getsockname(struct socket
*sock
, struct sockaddr
*addr
,
244 extern int kernel_getpeername(struct socket
*sock
, struct sockaddr
*addr
,
246 extern int kernel_getsockopt(struct socket
*sock
, int level
, int optname
,
247 char *optval
, int *optlen
);
248 extern int kernel_setsockopt(struct socket
*sock
, int level
, int optname
,
249 char *optval
, int optlen
);
250 extern int kernel_sendpage(struct socket
*sock
, struct page
*page
, int offset
,
251 size_t size
, int flags
);
252 extern int kernel_sock_ioctl(struct socket
*sock
, int cmd
, unsigned long arg
);
253 extern int kernel_sock_shutdown(struct socket
*sock
,
254 enum sock_shutdown_cmd how
);
257 #define SOCKOPS_WRAPPED(name) name
258 #define SOCKOPS_WRAP(name, fam)
261 #define SOCKOPS_WRAPPED(name) __unlocked_##name
263 #define SOCKCALL_WRAP(name, call, parms, args) \
264 static int __lock_##name##_##call parms \
268 ret = __unlocked_##name##_ops.call args ;\
273 #define SOCKCALL_UWRAP(name, call, parms, args) \
274 static unsigned int __lock_##name##_##call parms \
278 ret = __unlocked_##name##_ops.call args ;\
284 #define SOCKOPS_WRAP(name, fam) \
285 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
286 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
287 (sock, uaddr, addr_len)) \
288 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
289 int addr_len, int flags), \
290 (sock, uaddr, addr_len, flags)) \
291 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
293 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
294 int flags), (sock, newsock, flags)) \
295 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
296 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
297 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
298 (file, sock, wait)) \
299 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
300 unsigned long arg), (sock, cmd, arg)) \
301 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
302 unsigned long arg), (sock, cmd, arg)) \
303 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
304 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
305 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
306 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
307 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
308 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
309 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
310 (iocb, sock, m, len)) \
311 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
312 (iocb, sock, m, len, flags)) \
313 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
316 static const struct proto_ops name##_ops = { \
318 .owner = THIS_MODULE, \
319 .release = __lock_##name##_release, \
320 .bind = __lock_##name##_bind, \
321 .connect = __lock_##name##_connect, \
322 .socketpair = __lock_##name##_socketpair, \
323 .accept = __lock_##name##_accept, \
324 .getname = __lock_##name##_getname, \
325 .poll = __lock_##name##_poll, \
326 .ioctl = __lock_##name##_ioctl, \
327 .compat_ioctl = __lock_##name##_compat_ioctl, \
328 .listen = __lock_##name##_listen, \
329 .shutdown = __lock_##name##_shutdown, \
330 .setsockopt = __lock_##name##_setsockopt, \
331 .getsockopt = __lock_##name##_getsockopt, \
332 .sendmsg = __lock_##name##_sendmsg, \
333 .recvmsg = __lock_##name##_recvmsg, \
334 .mmap = __lock_##name##_mmap, \
339 #define MODULE_ALIAS_NETPROTO(proto) \
340 MODULE_ALIAS("net-pf-" __stringify(proto))
342 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
343 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
345 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
346 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
347 "-type-" __stringify(type))
350 #include <linux/sysctl.h>
351 extern int net_msg_cost
;
352 extern int net_msg_burst
;
355 #endif /* __KERNEL__ */
356 #endif /* _LINUX_NET_H */