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 <linux/socket.h>
23 #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
24 #include <asm/socket.h>
26 struct poll_table_struct;
27 struct pipe_inode_info;
33 #define SYS_SOCKET 1 /* sys_socket(2) */
34 #define SYS_BIND 2 /* sys_bind(2) */
35 #define SYS_CONNECT 3 /* sys_connect(2) */
36 #define SYS_LISTEN 4 /* sys_listen(2) */
37 #define SYS_ACCEPT 5 /* sys_accept(2) */
38 #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
39 #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
40 #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
41 #define SYS_SEND 9 /* sys_send(2) */
42 #define SYS_RECV 10 /* sys_recv(2) */
43 #define SYS_SENDTO 11 /* sys_sendto(2) */
44 #define SYS_RECVFROM 12 /* sys_recvfrom(2) */
45 #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
46 #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
47 #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
48 #define SYS_SENDMSG 16 /* sys_sendmsg(2) */
49 #define SYS_RECVMSG 17 /* sys_recvmsg(2) */
50 #define SYS_PACCEPT 18 /* sys_paccept(2) */
53 SS_FREE = 0, /* not allocated */
54 SS_UNCONNECTED, /* unconnected to any socket */
55 SS_CONNECTING, /* in process of connecting */
56 SS_CONNECTED, /* connected to socket */
57 SS_DISCONNECTING /* in process of disconnecting */
60 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */
63 #include <linux/stringify.h>
64 #include <linux/random.h>
66 #define SOCK_ASYNC_NOSPACE 0
67 #define SOCK_ASYNC_WAITDATA 1
68 #define SOCK_NOSPACE 2
69 #define SOCK_PASSCRED 3
70 #define SOCK_PASSSEC 4
72 #ifndef ARCH_HAS_SOCKET_TYPES
74 * enum sock_type - Socket types
75 * @SOCK_STREAM: stream (connection) socket
76 * @SOCK_DGRAM: datagram (conn.less) socket
77 * @SOCK_RAW: raw socket
78 * @SOCK_RDM: reliably-delivered message
79 * @SOCK_SEQPACKET: sequential packet socket
80 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
81 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
82 * For writing rarp and other similar things on the user level.
84 * When adding some new socket type please
85 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
86 * overrides this enum for binary compat reasons.
98 #define SOCK_MAX (SOCK_PACKET + 1)
99 /* Mask which covers at least up to SOCK_MASK-1. The
100 * remaining bits are used as flags. */
101 #define SOCK_TYPE_MASK 0xf
103 /* Flags for socket, socketpair, paccept */
104 #define SOCK_CLOEXEC O_CLOEXEC
105 #ifndef SOCK_NONBLOCK
106 #define SOCK_NONBLOCK O_NONBLOCK
109 #endif /* ARCH_HAS_SOCKET_TYPES */
111 enum sock_shutdown_cmd {
118 * struct socket - general BSD socket
119 * @state: socket state (%SS_CONNECTED, etc)
120 * @type: socket type (%SOCK_STREAM, etc)
121 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
122 * @ops: protocol specific socket operations
123 * @fasync_list: Asynchronous wake up list
124 * @file: File back pointer for gc
125 * @sk: internal networking protocol agnostic socket representation
126 * @wait: wait queue for several uses
132 const struct proto_ops *ops;
133 struct fasync_struct *fasync_list;
136 wait_queue_head_t wait;
139 struct vm_area_struct;
148 struct module *owner;
149 int (*release) (struct socket *sock);
150 int (*bind) (struct socket *sock,
151 struct sockaddr *myaddr,
153 int (*connect) (struct socket *sock,
154 struct sockaddr *vaddr,
155 int sockaddr_len, int flags);
156 int (*socketpair)(struct socket *sock1,
157 struct socket *sock2);
158 int (*accept) (struct socket *sock,
159 struct socket *newsock, int flags);
160 int (*getname) (struct socket *sock,
161 struct sockaddr *addr,
162 int *sockaddr_len, int peer);
163 unsigned int (*poll) (struct file *file, struct socket *sock,
164 struct poll_table_struct *wait);
165 int (*ioctl) (struct socket *sock, unsigned int cmd,
167 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
169 int (*listen) (struct socket *sock, int len);
170 int (*shutdown) (struct socket *sock, int flags);
171 int (*setsockopt)(struct socket *sock, int level,
172 int optname, char __user *optval, int optlen);
173 int (*getsockopt)(struct socket *sock, int level,
174 int optname, char __user *optval, int __user *optlen);
175 int (*compat_setsockopt)(struct socket *sock, int level,
176 int optname, char __user *optval, int optlen);
177 int (*compat_getsockopt)(struct socket *sock, int level,
178 int optname, char __user *optval, int __user *optlen);
179 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
180 struct msghdr *m, size_t total_len);
181 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
182 struct msghdr *m, size_t total_len,
184 int (*mmap) (struct file *file, struct socket *sock,
185 struct vm_area_struct * vma);
186 ssize_t (*sendpage) (struct socket *sock, struct page *page,
187 int offset, size_t size, int flags);
188 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
189 struct pipe_inode_info *pipe, size_t len, unsigned int flags);
192 struct net_proto_family {
194 int (*create)(struct net *net, struct socket *sock, int protocol);
195 struct module *owner;
208 extern int sock_wake_async(struct socket *sk, int how, int band);
209 extern int sock_register(const struct net_proto_family *fam);
210 extern void sock_unregister(int family);
211 extern int sock_create(int family, int type, int proto,
212 struct socket **res);
213 extern int sock_create_kern(int family, int type, int proto,
214 struct socket **res);
215 extern int sock_create_lite(int family, int type, int proto,
216 struct socket **res);
217 extern void sock_release(struct socket *sock);
218 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
220 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
221 size_t size, int flags);
222 extern int sock_map_fd(struct socket *sock, int flags);
223 extern struct socket *sockfd_lookup(int fd, int *err);
224 #define sockfd_put(sock) fput(sock->file)
225 extern int net_ratelimit(void);
226 extern long do_accept(int fd, struct sockaddr __user *upeer_sockaddr,
227 int __user *upeer_addrlen, int flags);
229 #define net_random() random32()
230 #define net_srandom(seed) srandom32((__force u32)seed)
232 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
233 struct kvec *vec, size_t num, size_t len);
234 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
235 struct kvec *vec, size_t num,
236 size_t len, int flags);
238 extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
240 extern int kernel_listen(struct socket *sock, int backlog);
241 extern int kernel_accept(struct socket *sock, struct socket **newsock,
243 extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
244 int addrlen, int flags);
245 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
247 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
249 extern int kernel_getsockopt(struct socket *sock, int level, int optname,
250 char *optval, int *optlen);
251 extern int kernel_setsockopt(struct socket *sock, int level, int optname,
252 char *optval, int optlen);
253 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
254 size_t size, int flags);
255 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
256 extern int kernel_sock_shutdown(struct socket *sock,
257 enum sock_shutdown_cmd how);
260 #define SOCKOPS_WRAPPED(name) name
261 #define SOCKOPS_WRAP(name, fam)
264 #define SOCKOPS_WRAPPED(name) __unlocked_##name
266 #define SOCKCALL_WRAP(name, call, parms, args) \
267 static int __lock_##name##_##call parms \
271 ret = __unlocked_##name##_ops.call args ;\
276 #define SOCKCALL_UWRAP(name, call, parms, args) \
277 static unsigned int __lock_##name##_##call parms \
281 ret = __unlocked_##name##_ops.call args ;\
287 #define SOCKOPS_WRAP(name, fam) \
288 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
289 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
290 (sock, uaddr, addr_len)) \
291 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
292 int addr_len, int flags), \
293 (sock, uaddr, addr_len, flags)) \
294 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
296 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
297 int flags), (sock, newsock, flags)) \
298 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
299 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
300 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
301 (file, sock, wait)) \
302 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
303 unsigned long arg), (sock, cmd, arg)) \
304 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
305 unsigned long arg), (sock, cmd, arg)) \
306 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
307 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
308 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
309 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
310 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
311 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
312 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
313 (iocb, sock, m, len)) \
314 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
315 (iocb, sock, m, len, flags)) \
316 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
319 static const struct proto_ops name##_ops = { \
321 .owner = THIS_MODULE, \
322 .release = __lock_##name##_release, \
323 .bind = __lock_##name##_bind, \
324 .connect = __lock_##name##_connect, \
325 .socketpair = __lock_##name##_socketpair, \
326 .accept = __lock_##name##_accept, \
327 .getname = __lock_##name##_getname, \
328 .poll = __lock_##name##_poll, \
329 .ioctl = __lock_##name##_ioctl, \
330 .compat_ioctl = __lock_##name##_compat_ioctl, \
331 .listen = __lock_##name##_listen, \
332 .shutdown = __lock_##name##_shutdown, \
333 .setsockopt = __lock_##name##_setsockopt, \
334 .getsockopt = __lock_##name##_getsockopt, \
335 .sendmsg = __lock_##name##_sendmsg, \
336 .recvmsg = __lock_##name##_recvmsg, \
337 .mmap = __lock_##name##_mmap, \
342 #define MODULE_ALIAS_NETPROTO(proto) \
343 MODULE_ALIAS("net-pf-" __stringify(proto))
345 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
346 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
348 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
349 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
350 "-type-" __stringify(type))
353 #include <linux/sysctl.h>
354 extern struct ratelimit_state net_ratelimit_state;
357 #endif /* __KERNEL__ */
358 #endif /* _LINUX_NET_H */