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
25 struct 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
49 typedef 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
65 struct 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
83 struct scm_cookie;
84 struct vm_area_struct;
85
86 struct proto_ops {
87 int family;
88
89 int (*release) (struct socket *sock);
90 int (*bind) (struct socket *sock, struct sockaddr *umyaddr,
91 int sockaddr_len);
92 int (*connect) (struct socket *sock, struct sockaddr *uservaddr,
93 int sockaddr_len, int flags);
94 int (*socketpair) (struct socket *sock1, struct socket *sock2);
95 int (*accept) (struct socket *sock, struct socket *newsock,
96 int flags);
97 int (*getname) (struct socket *sock, struct sockaddr *uaddr,
98 int *usockaddr_len, int peer);
99 unsigned int (*poll) (struct file *file, struct socket *sock, struct poll_table_struct *wait);
100 int (*ioctl) (struct socket *sock, unsigned int cmd,
101 unsigned long arg);
102 int (*listen) (struct socket *sock, int len);
103 int (*shutdown) (struct socket *sock, int flags);
104 int (*setsockopt) (struct socket *sock, int level, int optname,
105 char *optval, int optlen);
106 int (*getsockopt) (struct socket *sock, int level, int optname,
107 char *optval, int *optlen);
108 int (*sendmsg) (struct socket *sock, struct msghdr *m, int total_len, struct scm_cookie *scm);
109 int (*recvmsg) (struct socket *sock, struct msghdr *m, int total_len, int flags, struct scm_cookie *scm);
110 int (*mmap) (struct file *file, struct socket *sock, struct vm_area_struct * vma);
111 };
112
113 struct net_proto_family
114 {
115 int family;
116 int (*create)(struct socket *sock, int protocol);
117 /* These are counters for the number of different methods of
118 each we support */
119 short authentication;
120 short encryption;
121 short encrypt_net;
122 };
123
124 struct net_proto
125 {
126 const char *name; /* Protocol name */
127 void (*init_func)(struct net_proto *); /* Bootstrap */
128 };
129
130 extern int sock_wake_async(struct socket *sk, int how, int band);
131 extern int sock_register(struct net_proto_family *fam);
132 extern int sock_unregister(int family);
133 extern struct socket *sock_alloc(void);
134 extern int sock_create(int family, int type, int proto, struct socket **);
135 extern void sock_release(struct socket *);
136 extern int sock_sendmsg(struct socket *, struct msghdr *m, int len);
137 extern int sock_recvmsg(struct socket *, struct msghdr *m, int len, int flags);
138 extern int sock_readv_writev(int type, struct inode * inode, struct file * file,
139 const struct iovec * iov, long count, long size);
140
141 extern int net_ratelimit(void);
142 extern unsigned long net_random(void);
143 extern void net_srandom(unsigned long);
144
145 #ifndef CONFIG_SMP
146 #define SOCKOPS_WRAPPED(name) name
147 #define SOCKOPS_WRAP(name, fam)
148 #else
149
150 #define SOCKOPS_WRAPPED(name) __unlocked_##name
151
152 #define SOCKCALL_WRAP(name, call, parms, args) \
153 static int __lock_##name##_##call parms \
154 { \
155 int ret; \
156 lock_kernel(); \
157 ret = __unlocked_##name##_ops.call args ;\
158 unlock_kernel(); \
159 return ret; \
160 }
161
162 #define SOCKCALL_UWRAP(name, call, parms, args) \
163 static unsigned int __lock_##name##_##call parms \
164 { \
165 int ret; \
166 lock_kernel(); \
167 ret = __unlocked_##name##_ops.call args ;\
168 unlock_kernel(); \
169 return ret; \
170 }
171
172
173 #define SOCKOPS_WRAP(name, fam) \
174 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
175 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
176 (sock, uaddr, addr_len)) \
177 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
178 int addr_len, int flags), \
179 (sock, uaddr, addr_len, flags)) \
180 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
181 (sock1, sock2)) \
182 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
183 int flags), (sock, newsock, flags)) \
184 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
185 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
186 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
187 (file, sock, wait)) \
188 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
189 unsigned long arg), (sock, cmd, arg)) \
190 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
191 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
192 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
193 char *optval, int optlen), (sock, level, optname, optval, optlen)) \
194 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
195 char *optval, int *optlen), (sock, level, optname, optval, optlen)) \
196 SOCKCALL_WRAP(name, sendmsg, (struct socket *sock, struct msghdr *m, int len, struct scm_cookie *scm), \
197 (sock, m, len, scm)) \
198 SOCKCALL_WRAP(name, recvmsg, (struct socket *sock, struct msghdr *m, int len, int flags, struct scm_cookie *scm), \
199 (sock, m, len, flags, scm)) \
200 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
201 (file, sock, vma)) \
202 \
203 static struct proto_ops name##_ops = { \
204 family: fam, \
205 \
206 release: __lock_##name##_release, \
207 bind: __lock_##name##_bind, \
208 connect: __lock_##name##_connect, \
209 socketpair: __lock_##name##_socketpair, \
210 accept: __lock_##name##_accept, \
211 getname: __lock_##name##_getname, \
212 poll: __lock_##name##_poll, \
213 ioctl: __lock_##name##_ioctl, \
214 listen: __lock_##name##_listen, \
215 shutdown: __lock_##name##_shutdown, \
216 setsockopt: __lock_##name##_setsockopt, \
217 getsockopt: __lock_##name##_getsockopt, \
218 sendmsg: __lock_##name##_sendmsg, \
219 recvmsg: __lock_##name##_recvmsg, \
220 mmap: __lock_##name##_mmap, \
221 };
222 #endif
223
224
225 #endif /* __KERNEL__ */
226 #endif /* _LINUX_NET_H */
227
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