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_PACKET: linux specific way of getting packets at the dev level.
75 * For writing rarp and other similar things on the user level.
77 * When adding some new socket type please
78 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
79 * overrides this enum for binary compat reasons.
91 #define SOCK_MAX (SOCK_PACKET + 1)
93 #endif /* ARCH_HAS_SOCKET_TYPES */
96 * struct socket - general BSD socket
97 * @state: socket state (%SS_CONNECTED, etc)
98 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
99 * @ops: protocol specific socket operations
100 * @fasync_list: Asynchronous wake up list
101 * @file: File back pointer for gc
102 * @sk: internal networking protocol agnostic socket representation
103 * @wait: wait queue for several uses
104 * @type: socket type (%SOCK_STREAM, etc)
109 struct proto_ops *ops;
110 struct fasync_struct *fasync_list;
113 wait_queue_head_t wait;
117 struct vm_area_struct;
126 struct module *owner;
127 int (*release) (struct socket *sock);
128 int (*bind) (struct socket *sock,
129 struct sockaddr *myaddr,
131 int (*connect) (struct socket *sock,
132 struct sockaddr *vaddr,
133 int sockaddr_len, int flags);
134 int (*socketpair)(struct socket *sock1,
135 struct socket *sock2);
136 int (*accept) (struct socket *sock,
137 struct socket *newsock, int flags);
138 int (*getname) (struct socket *sock,
139 struct sockaddr *addr,
140 int *sockaddr_len, int peer);
141 unsigned int (*poll) (struct file *file, struct socket *sock,
142 struct poll_table_struct *wait);
143 int (*ioctl) (struct socket *sock, unsigned int cmd,
145 int (*listen) (struct socket *sock, int len);
146 int (*shutdown) (struct socket *sock, int flags);
147 int (*setsockopt)(struct socket *sock, int level,
148 int optname, char __user *optval, int optlen);
149 int (*getsockopt)(struct socket *sock, int level,
150 int optname, char __user *optval, int __user *optlen);
151 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
152 struct msghdr *m, size_t total_len);
153 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
154 struct msghdr *m, size_t total_len,
156 int (*mmap) (struct file *file, struct socket *sock,
157 struct vm_area_struct * vma);
158 ssize_t (*sendpage) (struct socket *sock, struct page *page,
159 int offset, size_t size, int flags);
162 struct net_proto_family {
164 int (*create)(struct socket *sock, int protocol);
165 /* These are counters for the number of different methods of
167 short authentication;
170 struct module *owner;
176 extern int sock_wake_async(struct socket *sk, int how, int band);
177 extern int sock_register(struct net_proto_family *fam);
178 extern int sock_unregister(int family);
179 extern int sock_create(int family, int type, int proto,
180 struct socket **res);
181 extern int sock_create_kern(int family, int type, int proto,
182 struct socket **res);
183 extern int sock_create_lite(int family, int type, int proto,
184 struct socket **res);
185 extern void sock_release(struct socket *sock);
186 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
188 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
189 size_t size, int flags);
190 extern int sock_map_fd(struct socket *sock);
191 extern struct socket *sockfd_lookup(int fd, int *err);
192 #define sockfd_put(sock) fput(sock->file)
193 extern int net_ratelimit(void);
194 extern unsigned long net_random(void);
195 extern void net_srandom(unsigned long);
196 extern void net_random_init(void);
198 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
199 struct kvec *vec, size_t num, size_t len);
200 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
201 struct kvec *vec, size_t num,
202 size_t len, int flags);
205 #define SOCKOPS_WRAPPED(name) name
206 #define SOCKOPS_WRAP(name, fam)
209 #define SOCKOPS_WRAPPED(name) __unlocked_##name
211 #define SOCKCALL_WRAP(name, call, parms, args) \
212 static int __lock_##name##_##call parms \
216 ret = __unlocked_##name##_ops.call args ;\
221 #define SOCKCALL_UWRAP(name, call, parms, args) \
222 static unsigned int __lock_##name##_##call parms \
226 ret = __unlocked_##name##_ops.call args ;\
232 #define SOCKOPS_WRAP(name, fam) \
233 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
234 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
235 (sock, uaddr, addr_len)) \
236 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
237 int addr_len, int flags), \
238 (sock, uaddr, addr_len, flags)) \
239 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
241 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
242 int flags), (sock, newsock, flags)) \
243 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
244 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
245 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
246 (file, sock, wait)) \
247 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
248 unsigned long arg), (sock, cmd, arg)) \
249 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
250 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
251 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
252 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
253 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
254 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
255 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
256 (iocb, sock, m, len)) \
257 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
258 (iocb, sock, m, len, flags)) \
259 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
262 static struct proto_ops name##_ops = { \
264 .owner = THIS_MODULE, \
265 .release = __lock_##name##_release, \
266 .bind = __lock_##name##_bind, \
267 .connect = __lock_##name##_connect, \
268 .socketpair = __lock_##name##_socketpair, \
269 .accept = __lock_##name##_accept, \
270 .getname = __lock_##name##_getname, \
271 .poll = __lock_##name##_poll, \
272 .ioctl = __lock_##name##_ioctl, \
273 .listen = __lock_##name##_listen, \
274 .shutdown = __lock_##name##_shutdown, \
275 .setsockopt = __lock_##name##_setsockopt, \
276 .getsockopt = __lock_##name##_getsockopt, \
277 .sendmsg = __lock_##name##_sendmsg, \
278 .recvmsg = __lock_##name##_recvmsg, \
279 .mmap = __lock_##name##_mmap, \
283 #define MODULE_ALIAS_NETPROTO(proto) \
284 MODULE_ALIAS("net-pf-" __stringify(proto))
286 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
287 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
290 #include <linux/sysctl.h>
291 extern ctl_table net_table[];
292 extern int net_msg_cost;
293 extern int net_msg_burst;
296 #endif /* __KERNEL__ */
297 #endif /* _LINUX_NET_H */