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[deliverable/linux.git] / include / linux / net.h
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1da177e4
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1/*
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
5 * kernel.
6 *
7 * Version: @(#)net.h 1.0.3 05/25/93
8 *
9 * Authors: Orest Zborowski, <obz@Kodak.COM>
02c30a84 10 * Ross Biro
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11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *
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.
17 */
18#ifndef _LINUX_NET_H
19#define _LINUX_NET_H
20
1da177e4 21#include <linux/wait.h>
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22#include <asm/socket.h>
23
24struct poll_table_struct;
25struct inode;
26
27#define NPROTO 32 /* should be enough for now.. */
28
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) */
46
47typedef enum {
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 */
53} socket_state;
54
55#define __SO_ACCEPTCON (1 << 16) /* performed a listen */
56
57#ifdef __KERNEL__
eacf17bd 58#include <linux/stringify.h>
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59
60#define SOCK_ASYNC_NOSPACE 0
61#define SOCK_ASYNC_WAITDATA 1
62#define SOCK_NOSPACE 2
63#define SOCK_PASSCRED 3
64
65#ifndef ARCH_HAS_SOCKET_TYPES
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66/**
67 * enum sock_type - Socket types
68 * @SOCK_STREAM: stream (connection) socket
69 * @SOCK_DGRAM: datagram (conn.less) socket
70 * @SOCK_RAW: raw socket
71 * @SOCK_RDM: reliably-delivered message
72 * @SOCK_SEQPACKET: sequential packet socket
8f2709b5 73 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
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PP
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.
76 *
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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.
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80 */
81enum sock_type {
82 SOCK_STREAM = 1,
83 SOCK_DGRAM = 2,
84 SOCK_RAW = 3,
85 SOCK_RDM = 4,
86 SOCK_SEQPACKET = 5,
7c657876 87 SOCK_DCCP = 6,
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88 SOCK_PACKET = 10,
89};
90
91#define SOCK_MAX (SOCK_PACKET + 1)
92
93#endif /* ARCH_HAS_SOCKET_TYPES */
94
95/**
96 * struct socket - general BSD socket
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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)
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105 */
106struct socket {
107 socket_state state;
108 unsigned long flags;
90ddc4f0 109 const struct proto_ops *ops;
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110 struct fasync_struct *fasync_list;
111 struct file *file;
112 struct sock *sk;
113 wait_queue_head_t wait;
114 short type;
115};
116
117struct vm_area_struct;
118struct page;
119struct kiocb;
120struct sockaddr;
121struct msghdr;
122struct module;
123
124struct proto_ops {
125 int family;
126 struct module *owner;
127 int (*release) (struct socket *sock);
128 int (*bind) (struct socket *sock,
129 struct sockaddr *myaddr,
130 int sockaddr_len);
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,
144 unsigned long arg);
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SP
145 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
146 unsigned long arg);
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147 int (*listen) (struct socket *sock, int len);
148 int (*shutdown) (struct socket *sock, int flags);
149 int (*setsockopt)(struct socket *sock, int level,
150 int optname, char __user *optval, int optlen);
151 int (*getsockopt)(struct socket *sock, int level,
152 int optname, char __user *optval, int __user *optlen);
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153 int (*compat_setsockopt)(struct socket *sock, int level,
154 int optname, char __user *optval, int optlen);
155 int (*compat_getsockopt)(struct socket *sock, int level,
156 int optname, char __user *optval, int __user *optlen);
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157 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
158 struct msghdr *m, size_t total_len);
159 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
160 struct msghdr *m, size_t total_len,
161 int flags);
162 int (*mmap) (struct file *file, struct socket *sock,
163 struct vm_area_struct * vma);
164 ssize_t (*sendpage) (struct socket *sock, struct page *page,
165 int offset, size_t size, int flags);
166};
167
168struct net_proto_family {
169 int family;
170 int (*create)(struct socket *sock, int protocol);
171 /* These are counters for the number of different methods of
172 each we support */
173 short authentication;
174 short encryption;
175 short encrypt_net;
176 struct module *owner;
177};
178
179struct iovec;
180struct kvec;
181
182extern int sock_wake_async(struct socket *sk, int how, int band);
183extern int sock_register(struct net_proto_family *fam);
184extern int sock_unregister(int family);
185extern int sock_create(int family, int type, int proto,
186 struct socket **res);
187extern int sock_create_kern(int family, int type, int proto,
188 struct socket **res);
189extern int sock_create_lite(int family, int type, int proto,
190 struct socket **res);
191extern void sock_release(struct socket *sock);
192extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
193 size_t len);
194extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
195 size_t size, int flags);
196extern int sock_map_fd(struct socket *sock);
197extern struct socket *sockfd_lookup(int fd, int *err);
198#define sockfd_put(sock) fput(sock->file)
199extern int net_ratelimit(void);
200extern unsigned long net_random(void);
201extern void net_srandom(unsigned long);
202extern void net_random_init(void);
203
204extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
205 struct kvec *vec, size_t num, size_t len);
206extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
207 struct kvec *vec, size_t num,
208 size_t len, int flags);
209
210#ifndef CONFIG_SMP
211#define SOCKOPS_WRAPPED(name) name
212#define SOCKOPS_WRAP(name, fam)
213#else
214
215#define SOCKOPS_WRAPPED(name) __unlocked_##name
216
217#define SOCKCALL_WRAP(name, call, parms, args) \
218static int __lock_##name##_##call parms \
219{ \
220 int ret; \
221 lock_kernel(); \
222 ret = __unlocked_##name##_ops.call args ;\
223 unlock_kernel(); \
224 return ret; \
225}
226
227#define SOCKCALL_UWRAP(name, call, parms, args) \
228static unsigned int __lock_##name##_##call parms \
229{ \
230 int ret; \
231 lock_kernel(); \
232 ret = __unlocked_##name##_ops.call args ;\
233 unlock_kernel(); \
234 return ret; \
235}
236
237
238#define SOCKOPS_WRAP(name, fam) \
239SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
240SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
241 (sock, uaddr, addr_len)) \
242SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
243 int addr_len, int flags), \
244 (sock, uaddr, addr_len, flags)) \
245SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
246 (sock1, sock2)) \
247SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
248 int flags), (sock, newsock, flags)) \
249SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
250 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
251SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
252 (file, sock, wait)) \
253SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
254 unsigned long arg), (sock, cmd, arg)) \
89bbfc95
SP
255SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
256 unsigned long arg), (sock, cmd, arg)) \
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257SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
258SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
259SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
260 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
261SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
262 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
263SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
264 (iocb, sock, m, len)) \
265SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
266 (iocb, sock, m, len, flags)) \
267SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
268 (file, sock, vma)) \
269 \
90ddc4f0 270static const struct proto_ops name##_ops = { \
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271 .family = fam, \
272 .owner = THIS_MODULE, \
273 .release = __lock_##name##_release, \
274 .bind = __lock_##name##_bind, \
275 .connect = __lock_##name##_connect, \
276 .socketpair = __lock_##name##_socketpair, \
277 .accept = __lock_##name##_accept, \
278 .getname = __lock_##name##_getname, \
279 .poll = __lock_##name##_poll, \
280 .ioctl = __lock_##name##_ioctl, \
89bbfc95 281 .compat_ioctl = __lock_##name##_compat_ioctl, \
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282 .listen = __lock_##name##_listen, \
283 .shutdown = __lock_##name##_shutdown, \
284 .setsockopt = __lock_##name##_setsockopt, \
285 .getsockopt = __lock_##name##_getsockopt, \
286 .sendmsg = __lock_##name##_sendmsg, \
287 .recvmsg = __lock_##name##_recvmsg, \
288 .mmap = __lock_##name##_mmap, \
289};
89bbfc95 290
1da177e4
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291#endif
292
293#define MODULE_ALIAS_NETPROTO(proto) \
294 MODULE_ALIAS("net-pf-" __stringify(proto))
295
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296#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
297 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
298
20380731
ACM
299#ifdef CONFIG_SYSCTL
300#include <linux/sysctl.h>
301extern ctl_table net_table[];
302extern int net_msg_cost;
303extern int net_msg_burst;
304#endif
305
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306#endif /* __KERNEL__ */
307#endif /* _LINUX_NET_H */
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