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
65 #define SOCK_USER_SOCKET 4
67 #ifndef ARCH_HAS_SOCKET_TYPES
69 * enum sock_type - Socket types
70 * @SOCK_STREAM: stream (connection) socket
71 * @SOCK_DGRAM: datagram (conn.less) socket
72 * @SOCK_RAW: raw socket
73 * @SOCK_RDM: reliably-delivered message
74 * @SOCK_SEQPACKET: sequential packet socket
75 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
76 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
77 * For writing rarp and other similar things on the user level.
79 * When adding some new socket type please
80 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
81 * overrides this enum for binary compat reasons.
93 #define SOCK_MAX (SOCK_PACKET + 1)
95 #endif /* ARCH_HAS_SOCKET_TYPES */
98 * struct socket - general BSD socket
99 * @state: socket state (%SS_CONNECTED, etc)
100 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
101 * @ops: protocol specific socket operations
102 * @fasync_list: Asynchronous wake up list
103 * @file: File back pointer for gc
104 * @sk: internal networking protocol agnostic socket representation
105 * @wait: wait queue for several uses
106 * @type: socket type (%SOCK_STREAM, etc)
111 const struct proto_ops *ops;
112 struct fasync_struct *fasync_list;
115 wait_queue_head_t wait;
119 struct vm_area_struct;
128 struct module *owner;
129 int (*release) (struct socket *sock);
130 int (*bind) (struct socket *sock,
131 struct sockaddr *myaddr,
133 int (*connect) (struct socket *sock,
134 struct sockaddr *vaddr,
135 int sockaddr_len, int flags);
136 int (*socketpair)(struct socket *sock1,
137 struct socket *sock2);
138 int (*accept) (struct socket *sock,
139 struct socket *newsock, int flags);
140 int (*getname) (struct socket *sock,
141 struct sockaddr *addr,
142 int *sockaddr_len, int peer);
143 unsigned int (*poll) (struct file *file, struct socket *sock,
144 struct poll_table_struct *wait);
145 int (*ioctl) (struct socket *sock, unsigned int cmd,
147 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
149 int (*listen) (struct socket *sock, int len);
150 int (*shutdown) (struct socket *sock, int flags);
151 int (*setsockopt)(struct socket *sock, int level,
152 int optname, char __user *optval, int optlen);
153 int (*getsockopt)(struct socket *sock, int level,
154 int optname, char __user *optval, int __user *optlen);
155 int (*compat_setsockopt)(struct socket *sock, int level,
156 int optname, char __user *optval, int optlen);
157 int (*compat_getsockopt)(struct socket *sock, int level,
158 int optname, char __user *optval, int __user *optlen);
159 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
160 struct msghdr *m, size_t total_len);
161 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
162 struct msghdr *m, size_t total_len,
164 int (*mmap) (struct file *file, struct socket *sock,
165 struct vm_area_struct * vma);
166 ssize_t (*sendpage) (struct socket *sock, struct page *page,
167 int offset, size_t size, int flags);
170 struct net_proto_family {
172 int (*create)(struct socket *sock, int protocol);
173 /* These are counters for the number of different methods of
175 short authentication;
178 struct module *owner;
184 extern int sock_wake_async(struct socket *sk, int how, int band);
185 extern int sock_register(struct net_proto_family *fam);
186 extern int sock_unregister(int family);
187 extern int sock_create(int family, int type, int proto,
188 struct socket **res);
189 extern int sock_create_kern(int family, int type, int proto,
190 struct socket **res);
191 extern int sock_create_lite(int family, int type, int proto,
192 struct socket **res);
193 extern struct socket *sock_alloc(void);
194 extern void sock_release(struct socket *sock);
195 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
197 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
198 size_t size, int flags);
199 extern int sock_map_fd(struct socket *sock);
200 extern struct socket *sockfd_lookup(int fd, int *err);
201 #define sockfd_put(sock) fput(sock->file)
202 extern int net_ratelimit(void);
203 extern unsigned long net_random(void);
204 extern void net_srandom(unsigned long);
205 extern void net_random_init(void);
207 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
208 struct kvec *vec, size_t num, size_t len);
209 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
210 struct kvec *vec, size_t num,
211 size_t len, int flags);
214 #define SOCKOPS_WRAPPED(name) name
215 #define SOCKOPS_WRAP(name, fam)
218 #define SOCKOPS_WRAPPED(name) __unlocked_##name
220 #define SOCKCALL_WRAP(name, call, parms, args) \
221 static int __lock_##name##_##call parms \
225 ret = __unlocked_##name##_ops.call args ;\
230 #define SOCKCALL_UWRAP(name, call, parms, args) \
231 static unsigned int __lock_##name##_##call parms \
235 ret = __unlocked_##name##_ops.call args ;\
241 #define SOCKOPS_WRAP(name, fam) \
242 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
243 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
244 (sock, uaddr, addr_len)) \
245 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
246 int addr_len, int flags), \
247 (sock, uaddr, addr_len, flags)) \
248 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
250 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
251 int flags), (sock, newsock, flags)) \
252 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
253 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
254 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
255 (file, sock, wait)) \
256 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
257 unsigned long arg), (sock, cmd, arg)) \
258 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
259 unsigned long arg), (sock, cmd, arg)) \
260 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
261 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
262 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
263 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
264 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
265 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
266 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
267 (iocb, sock, m, len)) \
268 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
269 (iocb, sock, m, len, flags)) \
270 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
273 static const struct proto_ops name##_ops = { \
275 .owner = THIS_MODULE, \
276 .release = __lock_##name##_release, \
277 .bind = __lock_##name##_bind, \
278 .connect = __lock_##name##_connect, \
279 .socketpair = __lock_##name##_socketpair, \
280 .accept = __lock_##name##_accept, \
281 .getname = __lock_##name##_getname, \
282 .poll = __lock_##name##_poll, \
283 .ioctl = __lock_##name##_ioctl, \
284 .compat_ioctl = __lock_##name##_compat_ioctl, \
285 .listen = __lock_##name##_listen, \
286 .shutdown = __lock_##name##_shutdown, \
287 .setsockopt = __lock_##name##_setsockopt, \
288 .getsockopt = __lock_##name##_getsockopt, \
289 .sendmsg = __lock_##name##_sendmsg, \
290 .recvmsg = __lock_##name##_recvmsg, \
291 .mmap = __lock_##name##_mmap, \
296 #define MODULE_ALIAS_NETPROTO(proto) \
297 MODULE_ALIAS("net-pf-" __stringify(proto))
299 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
300 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
303 #include <linux/sysctl.h>
304 extern ctl_table net_table[];
305 extern int net_msg_cost;
306 extern int net_msg_burst;
309 #endif /* __KERNEL__ */
310 #endif /* _LINUX_NET_H */