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 <asm/socket.h>
24 struct poll_table_struct;
27 #define NPROTO 32 /* should be enough for now.. */
29 #define SYS_SOCKET 1 /* sys_socket(2) */
30 #define SYS_BIND 2 /* sys_bind(2) */
31 #define SYS_CONNECT 3 /* sys_connect(2) */
32 #define SYS_LISTEN 4 /* sys_listen(2) */
33 #define SYS_ACCEPT 5 /* sys_accept(2) */
34 #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
35 #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
36 #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
37 #define SYS_SEND 9 /* sys_send(2) */
38 #define SYS_RECV 10 /* sys_recv(2) */
39 #define SYS_SENDTO 11 /* sys_sendto(2) */
40 #define SYS_RECVFROM 12 /* sys_recvfrom(2) */
41 #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
42 #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
43 #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
44 #define SYS_SENDMSG 16 /* sys_sendmsg(2) */
45 #define SYS_RECVMSG 17 /* sys_recvmsg(2) */
48 SS_FREE = 0, /* not allocated */
49 SS_UNCONNECTED, /* unconnected to any socket */
50 SS_CONNECTING, /* in process of connecting */
51 SS_CONNECTED, /* connected to socket */
52 SS_DISCONNECTING /* in process of disconnecting */
55 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */
58 #include <linux/stringify.h>
60 #define SOCK_ASYNC_NOSPACE 0
61 #define SOCK_ASYNC_WAITDATA 1
62 #define SOCK_NOSPACE 2
63 #define SOCK_PASSCRED 3
64 #define SOCK_PASSSEC 4
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);
211 extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
213 extern int kernel_listen(struct socket *sock, int backlog);
214 extern int kernel_accept(struct socket *sock, struct socket **newsock,
216 extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
217 int addrlen, int flags);
218 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
220 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
222 extern int kernel_getsockopt(struct socket *sock, int level, int optname,
223 char *optval, int *optlen);
224 extern int kernel_setsockopt(struct socket *sock, int level, int optname,
225 char *optval, int optlen);
226 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
227 size_t size, int flags);
228 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
231 #define SOCKOPS_WRAPPED(name) name
232 #define SOCKOPS_WRAP(name, fam)
235 #define SOCKOPS_WRAPPED(name) __unlocked_##name
237 #define SOCKCALL_WRAP(name, call, parms, args) \
238 static int __lock_##name##_##call parms \
242 ret = __unlocked_##name##_ops.call args ;\
247 #define SOCKCALL_UWRAP(name, call, parms, args) \
248 static unsigned int __lock_##name##_##call parms \
252 ret = __unlocked_##name##_ops.call args ;\
258 #define SOCKOPS_WRAP(name, fam) \
259 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
260 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
261 (sock, uaddr, addr_len)) \
262 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
263 int addr_len, int flags), \
264 (sock, uaddr, addr_len, flags)) \
265 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
267 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
268 int flags), (sock, newsock, flags)) \
269 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
270 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
271 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
272 (file, sock, wait)) \
273 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
274 unsigned long arg), (sock, cmd, arg)) \
275 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
276 unsigned long arg), (sock, cmd, arg)) \
277 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
278 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
279 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
280 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
281 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
282 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
283 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
284 (iocb, sock, m, len)) \
285 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
286 (iocb, sock, m, len, flags)) \
287 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
290 static const struct proto_ops name##_ops = { \
292 .owner = THIS_MODULE, \
293 .release = __lock_##name##_release, \
294 .bind = __lock_##name##_bind, \
295 .connect = __lock_##name##_connect, \
296 .socketpair = __lock_##name##_socketpair, \
297 .accept = __lock_##name##_accept, \
298 .getname = __lock_##name##_getname, \
299 .poll = __lock_##name##_poll, \
300 .ioctl = __lock_##name##_ioctl, \
301 .compat_ioctl = __lock_##name##_compat_ioctl, \
302 .listen = __lock_##name##_listen, \
303 .shutdown = __lock_##name##_shutdown, \
304 .setsockopt = __lock_##name##_setsockopt, \
305 .getsockopt = __lock_##name##_getsockopt, \
306 .sendmsg = __lock_##name##_sendmsg, \
307 .recvmsg = __lock_##name##_recvmsg, \
308 .mmap = __lock_##name##_mmap, \
313 #define MODULE_ALIAS_NETPROTO(proto) \
314 MODULE_ALIAS("net-pf-" __stringify(proto))
316 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
317 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
320 #include <linux/sysctl.h>
321 extern ctl_table net_table[];
322 extern int net_msg_cost;
323 extern int net_msg_burst;
326 #endif /* __KERNEL__ */
327 #endif /* _LINUX_NET_H */