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>
10 *		Ross Biro, <bir7@leland.Stanford.Edu>
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
21#include <linux/config.h>
22#include <linux/socket.h>
23#include <linux/wait.h>
24
25struct poll_table_struct;
26
27#define NPROTO		32		/* should be enough for now..	*/
28
29
30#define SYS_SOCKET	1		/* sys_socket(2)		*/
31#define SYS_BIND	2		/* sys_bind(2)			*/
32#define SYS_CONNECT	3		/* sys_connect(2)		*/
33#define SYS_LISTEN	4		/* sys_listen(2)		*/
34#define SYS_ACCEPT	5		/* sys_accept(2)		*/
35#define SYS_GETSOCKNAME	6		/* sys_getsockname(2)		*/
36#define SYS_GETPEERNAME	7		/* sys_getpeername(2)		*/
37#define SYS_SOCKETPAIR	8		/* sys_socketpair(2)		*/
38#define SYS_SEND	9		/* sys_send(2)			*/
39#define SYS_RECV	10		/* sys_recv(2)			*/
40#define SYS_SENDTO	11		/* sys_sendto(2)		*/
41#define SYS_RECVFROM	12		/* sys_recvfrom(2)		*/
42#define SYS_SHUTDOWN	13		/* sys_shutdown(2)		*/
43#define SYS_SETSOCKOPT	14		/* sys_setsockopt(2)		*/
44#define SYS_GETSOCKOPT	15		/* sys_getsockopt(2)		*/
45#define SYS_SENDMSG	16		/* sys_sendmsg(2)		*/
46#define SYS_RECVMSG	17		/* sys_recvmsg(2)		*/
47
48
49typedef enum {
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	*/
55} socket_state;
56
57#define __SO_ACCEPTCON	(1<<16)		/* performed a listen		*/
58
59#ifdef __KERNEL__
60
61#define SOCK_ASYNC_NOSPACE	0
62#define SOCK_ASYNC_WAITDATA	1
63#define SOCK_NOSPACE		2
64
65struct socket
66{
67	socket_state		state;
68
69	unsigned long		flags;
70	struct proto_ops	*ops;
71	struct inode		*inode;
72	struct fasync_struct	*fasync_list;	/* Asynchronous wake up list	*/
73	struct file		*file;		/* File back pointer for gc	*/
74	struct sock		*sk;
75	wait_queue_head_t	wait;
76
77	short			type;
78	unsigned char		passcred;
79};
80
81#define SOCK_INODE(S)	((S)->inode)
82
83struct scm_cookie;
84struct vm_area_struct;
85struct page;
86
87struct proto_ops {
88  int	family;
89
90  int	(*release)	(struct socket *sock);
91  int	(*bind)		(struct socket *sock, struct sockaddr *umyaddr,
92			 int sockaddr_len);
93  int	(*connect)	(struct socket *sock, struct sockaddr *uservaddr,
94			 int sockaddr_len, int flags);
95  int	(*socketpair)	(struct socket *sock1, struct socket *sock2);
96  int	(*accept)	(struct socket *sock, struct socket *newsock,
97			 int flags);
98  int	(*getname)	(struct socket *sock, struct sockaddr *uaddr,
99			 int *usockaddr_len, int peer);
100  unsigned int (*poll)	(struct file *file, struct socket *sock, struct poll_table_struct *wait);
101  int	(*ioctl)	(struct socket *sock, unsigned int cmd,
102			 unsigned long arg);
103  int	(*listen)	(struct socket *sock, int len);
104  int	(*shutdown)	(struct socket *sock, int flags);
105  int	(*setsockopt)	(struct socket *sock, int level, int optname,
106			 char *optval, int optlen);
107  int	(*getsockopt)	(struct socket *sock, int level, int optname,
108			 char *optval, int *optlen);
109  int   (*sendmsg)	(struct socket *sock, struct msghdr *m, int total_len, struct scm_cookie *scm);
110  int   (*recvmsg)	(struct socket *sock, struct msghdr *m, int total_len, int flags, struct scm_cookie *scm);
111  int	(*mmap)		(struct file *file, struct socket *sock, struct vm_area_struct * vma);
112  ssize_t (*sendpage)	(struct socket *sock, struct page *page, int offset, size_t size, int flags);
113};
114
115struct net_proto_family
116{
117	int	family;
118	int	(*create)(struct socket *sock, int protocol);
119	/* These are counters for the number of different methods of
120	   each we support */
121	short	authentication;
122	short	encryption;
123	short	encrypt_net;
124};
125
126struct net_proto
127{
128	const char *name;		/* Protocol name */
129	void (*init_func)(struct net_proto *);	/* Bootstrap */
130};
131
132extern int	sock_wake_async(struct socket *sk, int how, int band);
133extern int	sock_register(struct net_proto_family *fam);
134extern int	sock_unregister(int family);
135extern struct socket *sock_alloc(void);
136extern int	sock_create(int family, int type, int proto, struct socket **);
137extern void	sock_release(struct socket *);
138extern int   	sock_sendmsg(struct socket *, struct msghdr *m, int len);
139extern int	sock_recvmsg(struct socket *, struct msghdr *m, int len, int flags);
140extern int	sock_readv_writev(int type, struct inode * inode, struct file * file,
141				  const struct iovec * iov, long count, long size);
142
143extern int	net_ratelimit(void);
144extern unsigned long net_random(void);
145extern void net_srandom(unsigned long);
146
147#ifndef CONFIG_SMP
148#define SOCKOPS_WRAPPED(name) name
149#define SOCKOPS_WRAP(name, fam)
150#else
151
152#define SOCKOPS_WRAPPED(name) __unlocked_##name
153
154#define SOCKCALL_WRAP(name, call, parms, args)		\
155static int __lock_##name##_##call  parms		\
156{							\
157	int ret;					\
158	lock_kernel();					\
159	ret = __unlocked_##name##_ops.call  args ;\
160	unlock_kernel();				\
161	return ret;					\
162}
163
164#define SOCKCALL_UWRAP(name, call, parms, args)		\
165static unsigned int __lock_##name##_##call  parms	\
166{							\
167	int ret;					\
168	lock_kernel();					\
169	ret = __unlocked_##name##_ops.call  args ;\
170	unlock_kernel();				\
171	return ret;					\
172}
173
174
175#define SOCKOPS_WRAP(name, fam)					\
176SOCKCALL_WRAP(name, release, (struct socket *sock), (sock))	\
177SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
178	      (sock, uaddr, addr_len))				\
179SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
180			      int addr_len, int flags), 	\
181	      (sock, uaddr, addr_len, flags))			\
182SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
183	      (sock1, sock2))					\
184SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
185			 int flags), (sock, newsock, flags)) \
186SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
187			 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
188SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
189	      (file, sock, wait)) \
190SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
191			 unsigned long arg), (sock, cmd, arg)) \
192SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
193SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
194SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
195			 char *optval, int optlen), (sock, level, optname, optval, optlen)) \
196SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
197			 char *optval, int *optlen), (sock, level, optname, optval, optlen)) \
198SOCKCALL_WRAP(name, sendmsg, (struct socket *sock, struct msghdr *m, int len, struct scm_cookie *scm), \
199	      (sock, m, len, scm)) \
200SOCKCALL_WRAP(name, recvmsg, (struct socket *sock, struct msghdr *m, int len, int flags, struct scm_cookie *scm), \
201	      (sock, m, len, flags, scm)) \
202SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
203	      (file, sock, vma)) \
204	      \
205static struct proto_ops name##_ops = {			\
206	family:		fam,				\
207							\
208	release:	__lock_##name##_release,	\
209	bind:		__lock_##name##_bind,		\
210	connect:	__lock_##name##_connect,	\
211	socketpair:	__lock_##name##_socketpair,	\
212	accept:		__lock_##name##_accept,		\
213	getname:	__lock_##name##_getname,	\
214	poll:		__lock_##name##_poll,		\
215	ioctl:		__lock_##name##_ioctl,		\
216	listen:		__lock_##name##_listen,		\
217	shutdown:	__lock_##name##_shutdown,	\
218	setsockopt:	__lock_##name##_setsockopt,	\
219	getsockopt:	__lock_##name##_getsockopt,	\
220	sendmsg:	__lock_##name##_sendmsg,	\
221	recvmsg:	__lock_##name##_recvmsg,	\
222	mmap:		__lock_##name##_mmap,		\
223};
224#endif
225
226
227#endif /* __KERNEL__ */
228#endif	/* _LINUX_NET_H */
229