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;
25 struct pipe_inode_info;
29 #define NPROTO 34 /* 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 */
60 #include <linux/stringify.h>
61 #include <linux/random.h>
63 #define SOCK_ASYNC_NOSPACE 0
64 #define SOCK_ASYNC_WAITDATA 1
65 #define SOCK_NOSPACE 2
66 #define SOCK_PASSCRED 3
67 #define SOCK_PASSSEC 4
69 #ifndef ARCH_HAS_SOCKET_TYPES
71 * enum sock_type - Socket types
72 * @SOCK_STREAM: stream (connection) socket
73 * @SOCK_DGRAM: datagram (conn.less) socket
74 * @SOCK_RAW: raw socket
75 * @SOCK_RDM: reliably-delivered message
76 * @SOCK_SEQPACKET: sequential packet socket
77 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
78 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
79 * For writing rarp and other similar things on the user level.
81 * When adding some new socket type please
82 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
83 * overrides this enum for binary compat reasons.
95 #define SOCK_MAX (SOCK_PACKET + 1)
97 #endif /* ARCH_HAS_SOCKET_TYPES */
99 enum sock_shutdown_cmd {
106 * struct socket - general BSD socket
107 * @state: socket state (%SS_CONNECTED, etc)
108 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
109 * @ops: protocol specific socket operations
110 * @fasync_list: Asynchronous wake up list
111 * @file: File back pointer for gc
112 * @sk: internal networking protocol agnostic socket representation
113 * @wait: wait queue for several uses
114 * @type: socket type (%SOCK_STREAM, etc)
119 const struct proto_ops *ops;
120 struct fasync_struct *fasync_list;
123 wait_queue_head_t wait;
127 struct vm_area_struct;
136 struct module *owner;
137 int (*release) (struct socket *sock);
138 int (*bind) (struct socket *sock,
139 struct sockaddr *myaddr,
141 int (*connect) (struct socket *sock,
142 struct sockaddr *vaddr,
143 int sockaddr_len, int flags);
144 int (*socketpair)(struct socket *sock1,
145 struct socket *sock2);
146 int (*accept) (struct socket *sock,
147 struct socket *newsock, int flags);
148 int (*getname) (struct socket *sock,
149 struct sockaddr *addr,
150 int *sockaddr_len, int peer);
151 unsigned int (*poll) (struct file *file, struct socket *sock,
152 struct poll_table_struct *wait);
153 int (*ioctl) (struct socket *sock, unsigned int cmd,
155 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
157 int (*listen) (struct socket *sock, int len);
158 int (*shutdown) (struct socket *sock, int flags);
159 int (*setsockopt)(struct socket *sock, int level,
160 int optname, char __user *optval, int optlen);
161 int (*getsockopt)(struct socket *sock, int level,
162 int optname, char __user *optval, int __user *optlen);
163 int (*compat_setsockopt)(struct socket *sock, int level,
164 int optname, char __user *optval, int optlen);
165 int (*compat_getsockopt)(struct socket *sock, int level,
166 int optname, char __user *optval, int __user *optlen);
167 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
168 struct msghdr *m, size_t total_len);
169 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
170 struct msghdr *m, size_t total_len,
172 int (*mmap) (struct file *file, struct socket *sock,
173 struct vm_area_struct * vma);
174 ssize_t (*sendpage) (struct socket *sock, struct page *page,
175 int offset, size_t size, int flags);
176 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
177 struct pipe_inode_info *pipe, size_t len, unsigned int flags);
180 struct net_proto_family {
182 int (*create)(struct net *net, struct socket *sock, int protocol);
183 struct module *owner;
196 extern int sock_wake_async(struct socket *sk, int how, int band);
197 extern int sock_register(const struct net_proto_family *fam);
198 extern void sock_unregister(int family);
199 extern int sock_create(int family, int type, int proto,
200 struct socket **res);
201 extern int sock_create_kern(int family, int type, int proto,
202 struct socket **res);
203 extern int sock_create_lite(int family, int type, int proto,
204 struct socket **res);
205 extern void sock_release(struct socket *sock);
206 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
208 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
209 size_t size, int flags);
210 extern int sock_map_fd(struct socket *sock);
211 extern struct socket *sockfd_lookup(int fd, int *err);
212 #define sockfd_put(sock) fput(sock->file)
213 extern int net_ratelimit(void);
215 #define net_random() random32()
216 #define net_srandom(seed) srandom32((__force u32)seed)
218 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
219 struct kvec *vec, size_t num, size_t len);
220 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
221 struct kvec *vec, size_t num,
222 size_t len, int flags);
224 extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
226 extern int kernel_listen(struct socket *sock, int backlog);
227 extern int kernel_accept(struct socket *sock, struct socket **newsock,
229 extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
230 int addrlen, int flags);
231 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
233 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
235 extern int kernel_getsockopt(struct socket *sock, int level, int optname,
236 char *optval, int *optlen);
237 extern int kernel_setsockopt(struct socket *sock, int level, int optname,
238 char *optval, int optlen);
239 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
240 size_t size, int flags);
241 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
242 extern int kernel_sock_shutdown(struct socket *sock,
243 enum sock_shutdown_cmd how);
246 #define SOCKOPS_WRAPPED(name) name
247 #define SOCKOPS_WRAP(name, fam)
250 #define SOCKOPS_WRAPPED(name) __unlocked_##name
252 #define SOCKCALL_WRAP(name, call, parms, args) \
253 static int __lock_##name##_##call parms \
257 ret = __unlocked_##name##_ops.call args ;\
262 #define SOCKCALL_UWRAP(name, call, parms, args) \
263 static unsigned int __lock_##name##_##call parms \
267 ret = __unlocked_##name##_ops.call args ;\
273 #define SOCKOPS_WRAP(name, fam) \
274 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
275 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
276 (sock, uaddr, addr_len)) \
277 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
278 int addr_len, int flags), \
279 (sock, uaddr, addr_len, flags)) \
280 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
282 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
283 int flags), (sock, newsock, flags)) \
284 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
285 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
286 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
287 (file, sock, wait)) \
288 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
289 unsigned long arg), (sock, cmd, arg)) \
290 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
291 unsigned long arg), (sock, cmd, arg)) \
292 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
293 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
294 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
295 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
296 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
297 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
298 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
299 (iocb, sock, m, len)) \
300 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
301 (iocb, sock, m, len, flags)) \
302 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
305 static const struct proto_ops name##_ops = { \
307 .owner = THIS_MODULE, \
308 .release = __lock_##name##_release, \
309 .bind = __lock_##name##_bind, \
310 .connect = __lock_##name##_connect, \
311 .socketpair = __lock_##name##_socketpair, \
312 .accept = __lock_##name##_accept, \
313 .getname = __lock_##name##_getname, \
314 .poll = __lock_##name##_poll, \
315 .ioctl = __lock_##name##_ioctl, \
316 .compat_ioctl = __lock_##name##_compat_ioctl, \
317 .listen = __lock_##name##_listen, \
318 .shutdown = __lock_##name##_shutdown, \
319 .setsockopt = __lock_##name##_setsockopt, \
320 .getsockopt = __lock_##name##_getsockopt, \
321 .sendmsg = __lock_##name##_sendmsg, \
322 .recvmsg = __lock_##name##_recvmsg, \
323 .mmap = __lock_##name##_mmap, \
328 #define MODULE_ALIAS_NETPROTO(proto) \
329 MODULE_ALIAS("net-pf-" __stringify(proto))
331 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
332 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
334 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
335 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
336 "-type-" __stringify(type))
339 #include <linux/sysctl.h>
340 extern int net_msg_cost;
341 extern int net_msg_burst;
344 #endif /* __KERNEL__ */
345 #endif /* _LINUX_NET_H */