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/config.h>
22 #include <linux/wait.h>
23 #include <linux/stringify.h>
24 #include <asm/socket.h>
26 struct poll_table_struct
;
29 #define NPROTO 32 /* should be enough for now.. */
31 #define SYS_SOCKET 1 /* sys_socket(2) */
32 #define SYS_BIND 2 /* sys_bind(2) */
33 #define SYS_CONNECT 3 /* sys_connect(2) */
34 #define SYS_LISTEN 4 /* sys_listen(2) */
35 #define SYS_ACCEPT 5 /* sys_accept(2) */
36 #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
37 #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
38 #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
39 #define SYS_SEND 9 /* sys_send(2) */
40 #define SYS_RECV 10 /* sys_recv(2) */
41 #define SYS_SENDTO 11 /* sys_sendto(2) */
42 #define SYS_RECVFROM 12 /* sys_recvfrom(2) */
43 #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
44 #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
45 #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
46 #define SYS_SENDMSG 16 /* sys_sendmsg(2) */
47 #define SYS_RECVMSG 17 /* sys_recvmsg(2) */
50 SS_FREE
= 0, /* not allocated */
51 SS_UNCONNECTED
, /* unconnected to any socket */
52 SS_CONNECTING
, /* in process of connecting */
53 SS_CONNECTED
, /* connected to socket */
54 SS_DISCONNECTING
/* in process of disconnecting */
57 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */
61 #define SOCK_ASYNC_NOSPACE 0
62 #define SOCK_ASYNC_WAITDATA 1
63 #define SOCK_NOSPACE 2
64 #define SOCK_PASSCRED 3
66 #ifndef ARCH_HAS_SOCKET_TYPES
68 * enum sock_type - Socket types
69 * @SOCK_STREAM: stream (connection) socket
70 * @SOCK_DGRAM: datagram (conn.less) socket
71 * @SOCK_RAW: raw socket
72 * @SOCK_RDM: reliably-delivered message
73 * @SOCK_SEQPACKET: sequential packet socket
74 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
75 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
76 * For writing rarp and other similar things on the user level.
78 * When adding some new socket type please
79 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
80 * overrides this enum for binary compat reasons.
92 #define SOCK_MAX (SOCK_PACKET + 1)
94 #endif /* ARCH_HAS_SOCKET_TYPES */
97 * struct socket - general BSD socket
98 * @state: socket state (%SS_CONNECTED, etc)
99 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
100 * @ops: protocol specific socket operations
101 * @fasync_list: Asynchronous wake up list
102 * @file: File back pointer for gc
103 * @sk: internal networking protocol agnostic socket representation
104 * @wait: wait queue for several uses
105 * @type: socket type (%SOCK_STREAM, etc)
110 const struct proto_ops
*ops
;
111 struct fasync_struct
*fasync_list
;
114 wait_queue_head_t wait
;
118 struct vm_area_struct
;
127 struct module
*owner
;
128 int (*release
) (struct socket
*sock
);
129 int (*bind
) (struct socket
*sock
,
130 struct sockaddr
*myaddr
,
132 int (*connect
) (struct socket
*sock
,
133 struct sockaddr
*vaddr
,
134 int sockaddr_len
, int flags
);
135 int (*socketpair
)(struct socket
*sock1
,
136 struct socket
*sock2
);
137 int (*accept
) (struct socket
*sock
,
138 struct socket
*newsock
, int flags
);
139 int (*getname
) (struct socket
*sock
,
140 struct sockaddr
*addr
,
141 int *sockaddr_len
, int peer
);
142 unsigned int (*poll
) (struct file
*file
, struct socket
*sock
,
143 struct poll_table_struct
*wait
);
144 int (*ioctl
) (struct socket
*sock
, unsigned int cmd
,
146 int (*compat_ioctl
) (struct socket
*sock
, unsigned int cmd
,
148 int (*listen
) (struct socket
*sock
, int len
);
149 int (*shutdown
) (struct socket
*sock
, int flags
);
150 int (*setsockopt
)(struct socket
*sock
, int level
,
151 int optname
, char __user
*optval
, int optlen
);
152 int (*getsockopt
)(struct socket
*sock
, int level
,
153 int optname
, char __user
*optval
, int __user
*optlen
);
154 int (*compat_setsockopt
)(struct socket
*sock
, int level
,
155 int optname
, char __user
*optval
, int optlen
);
156 int (*compat_getsockopt
)(struct socket
*sock
, int level
,
157 int optname
, char __user
*optval
, int __user
*optlen
);
158 int (*sendmsg
) (struct kiocb
*iocb
, struct socket
*sock
,
159 struct msghdr
*m
, size_t total_len
);
160 int (*recvmsg
) (struct kiocb
*iocb
, struct socket
*sock
,
161 struct msghdr
*m
, size_t total_len
,
163 int (*mmap
) (struct file
*file
, struct socket
*sock
,
164 struct vm_area_struct
* vma
);
165 ssize_t (*sendpage
) (struct socket
*sock
, struct page
*page
,
166 int offset
, size_t size
, int flags
);
169 struct net_proto_family
{
171 int (*create
)(struct socket
*sock
, int protocol
);
172 /* These are counters for the number of different methods of
174 short authentication
;
177 struct module
*owner
;
183 extern int sock_wake_async(struct socket
*sk
, int how
, int band
);
184 extern int sock_register(struct net_proto_family
*fam
);
185 extern int sock_unregister(int family
);
186 extern int sock_create(int family
, int type
, int proto
,
187 struct socket
**res
);
188 extern int sock_create_kern(int family
, int type
, int proto
,
189 struct socket
**res
);
190 extern int sock_create_lite(int family
, int type
, int proto
,
191 struct socket
**res
);
192 extern void sock_release(struct socket
*sock
);
193 extern int sock_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
195 extern int sock_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
196 size_t size
, int flags
);
197 extern int sock_map_fd(struct socket
*sock
);
198 extern struct socket
*sockfd_lookup(int fd
, int *err
);
199 #define sockfd_put(sock) fput(sock->file)
200 extern int net_ratelimit(void);
201 extern unsigned long net_random(void);
202 extern void net_srandom(unsigned long);
203 extern void net_random_init(void);
205 extern int kernel_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
206 struct kvec
*vec
, size_t num
, size_t len
);
207 extern int kernel_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
208 struct kvec
*vec
, size_t num
,
209 size_t len
, int flags
);
212 #define SOCKOPS_WRAPPED(name) name
213 #define SOCKOPS_WRAP(name, fam)
216 #define SOCKOPS_WRAPPED(name) __unlocked_##name
218 #define SOCKCALL_WRAP(name, call, parms, args) \
219 static int __lock_##name##_##call parms \
223 ret = __unlocked_##name##_ops.call args ;\
228 #define SOCKCALL_UWRAP(name, call, parms, args) \
229 static unsigned int __lock_##name##_##call parms \
233 ret = __unlocked_##name##_ops.call args ;\
239 #define SOCKOPS_WRAP(name, fam) \
240 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
241 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
242 (sock, uaddr, addr_len)) \
243 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
244 int addr_len, int flags), \
245 (sock, uaddr, addr_len, flags)) \
246 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
248 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
249 int flags), (sock, newsock, flags)) \
250 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
251 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
252 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
253 (file, sock, wait)) \
254 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
255 unsigned long arg), (sock, cmd, arg)) \
256 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
257 unsigned long arg), (sock, cmd, arg)) \
258 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
259 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
260 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
261 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
262 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
263 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
264 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
265 (iocb, sock, m, len)) \
266 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
267 (iocb, sock, m, len, flags)) \
268 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
271 static const struct proto_ops name##_ops = { \
273 .owner = THIS_MODULE, \
274 .release = __lock_##name##_release, \
275 .bind = __lock_##name##_bind, \
276 .connect = __lock_##name##_connect, \
277 .socketpair = __lock_##name##_socketpair, \
278 .accept = __lock_##name##_accept, \
279 .getname = __lock_##name##_getname, \
280 .poll = __lock_##name##_poll, \
281 .ioctl = __lock_##name##_ioctl, \
282 .compat_ioctl = __lock_##name##_compat_ioctl, \
283 .listen = __lock_##name##_listen, \
284 .shutdown = __lock_##name##_shutdown, \
285 .setsockopt = __lock_##name##_setsockopt, \
286 .getsockopt = __lock_##name##_getsockopt, \
287 .sendmsg = __lock_##name##_sendmsg, \
288 .recvmsg = __lock_##name##_recvmsg, \
289 .mmap = __lock_##name##_mmap, \
294 #define MODULE_ALIAS_NETPROTO(proto) \
295 MODULE_ALIAS("net-pf-" __stringify(proto))
297 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
298 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
301 #include <linux/sysctl.h>
302 extern ctl_table net_table
[];
303 extern int net_msg_cost
;
304 extern int net_msg_burst
;
307 #endif /* __KERNEL__ */
308 #endif /* _LINUX_NET_H */