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1da177e4 LT |
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 |
1da177e4 LT |
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> |
1da177e4 LT |
22 | #include <asm/socket.h> |
23 | ||
24 | struct poll_table_struct; | |
25 | struct inode; | |
26 | ||
17926a79 | 27 | #define NPROTO 34 /* should be enough for now.. */ |
1da177e4 LT |
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 | ||
47 | typedef 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> |
cb4db4c2 | 59 | #include <linux/random.h> |
1da177e4 LT |
60 | |
61 | #define SOCK_ASYNC_NOSPACE 0 | |
62 | #define SOCK_ASYNC_WAITDATA 1 | |
63 | #define SOCK_NOSPACE 2 | |
64 | #define SOCK_PASSCRED 3 | |
877ce7c1 | 65 | #define SOCK_PASSSEC 4 |
1da177e4 LT |
66 | |
67 | #ifndef ARCH_HAS_SOCKET_TYPES | |
4dc3b16b PP |
68 | /** |
69 | * enum sock_type - Socket types | |
70 | * @SOCK_STREAM: stream (connection) socket | |
71 | * @SOCK_DGRAM: datagram (conn.less) socket | |
72 | * @SOCK_RAW: raw socket | |
73 | * @SOCK_RDM: reliably-delivered message | |
74 | * @SOCK_SEQPACKET: sequential packet socket | |
8f2709b5 | 75 | * @SOCK_DCCP: Datagram Congestion Control Protocol socket |
4dc3b16b PP |
76 | * @SOCK_PACKET: linux specific way of getting packets at the dev level. |
77 | * For writing rarp and other similar things on the user level. | |
78 | * | |
1da177e4 LT |
79 | * When adding some new socket type please |
80 | * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS | |
81 | * overrides this enum for binary compat reasons. | |
1da177e4 LT |
82 | */ |
83 | enum sock_type { | |
84 | SOCK_STREAM = 1, | |
85 | SOCK_DGRAM = 2, | |
86 | SOCK_RAW = 3, | |
87 | SOCK_RDM = 4, | |
88 | SOCK_SEQPACKET = 5, | |
7c657876 | 89 | SOCK_DCCP = 6, |
1da177e4 LT |
90 | SOCK_PACKET = 10, |
91 | }; | |
92 | ||
93 | #define SOCK_MAX (SOCK_PACKET + 1) | |
94 | ||
95 | #endif /* ARCH_HAS_SOCKET_TYPES */ | |
96 | ||
97 | /** | |
98 | * struct socket - general BSD socket | |
4dc3b16b PP |
99 | * @state: socket state (%SS_CONNECTED, etc) |
100 | * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) | |
101 | * @ops: protocol specific socket operations | |
102 | * @fasync_list: Asynchronous wake up list | |
103 | * @file: File back pointer for gc | |
104 | * @sk: internal networking protocol agnostic socket representation | |
105 | * @wait: wait queue for several uses | |
106 | * @type: socket type (%SOCK_STREAM, etc) | |
1da177e4 LT |
107 | */ |
108 | struct socket { | |
109 | socket_state state; | |
110 | unsigned long flags; | |
90ddc4f0 | 111 | const struct proto_ops *ops; |
1da177e4 LT |
112 | struct fasync_struct *fasync_list; |
113 | struct file *file; | |
114 | struct sock *sk; | |
115 | wait_queue_head_t wait; | |
116 | short type; | |
117 | }; | |
118 | ||
119 | struct vm_area_struct; | |
120 | struct page; | |
121 | struct kiocb; | |
122 | struct sockaddr; | |
123 | struct msghdr; | |
124 | struct module; | |
125 | ||
126 | struct proto_ops { | |
127 | int family; | |
128 | struct module *owner; | |
129 | int (*release) (struct socket *sock); | |
130 | int (*bind) (struct socket *sock, | |
131 | struct sockaddr *myaddr, | |
132 | int sockaddr_len); | |
133 | int (*connect) (struct socket *sock, | |
134 | struct sockaddr *vaddr, | |
135 | int sockaddr_len, int flags); | |
136 | int (*socketpair)(struct socket *sock1, | |
137 | struct socket *sock2); | |
138 | int (*accept) (struct socket *sock, | |
139 | struct socket *newsock, int flags); | |
140 | int (*getname) (struct socket *sock, | |
141 | struct sockaddr *addr, | |
142 | int *sockaddr_len, int peer); | |
143 | unsigned int (*poll) (struct file *file, struct socket *sock, | |
144 | struct poll_table_struct *wait); | |
145 | int (*ioctl) (struct socket *sock, unsigned int cmd, | |
146 | unsigned long arg); | |
89bbfc95 SP |
147 | int (*compat_ioctl) (struct socket *sock, unsigned int cmd, |
148 | unsigned long arg); | |
1da177e4 LT |
149 | int (*listen) (struct socket *sock, int len); |
150 | int (*shutdown) (struct socket *sock, int flags); | |
151 | int (*setsockopt)(struct socket *sock, int level, | |
152 | int optname, char __user *optval, int optlen); | |
153 | int (*getsockopt)(struct socket *sock, int level, | |
154 | int optname, char __user *optval, int __user *optlen); | |
3fdadf7d DM |
155 | int (*compat_setsockopt)(struct socket *sock, int level, |
156 | int optname, char __user *optval, int optlen); | |
157 | int (*compat_getsockopt)(struct socket *sock, int level, | |
158 | int optname, char __user *optval, int __user *optlen); | |
1da177e4 LT |
159 | int (*sendmsg) (struct kiocb *iocb, struct socket *sock, |
160 | struct msghdr *m, size_t total_len); | |
161 | int (*recvmsg) (struct kiocb *iocb, struct socket *sock, | |
162 | struct msghdr *m, size_t total_len, | |
163 | int flags); | |
164 | int (*mmap) (struct file *file, struct socket *sock, | |
165 | struct vm_area_struct * vma); | |
166 | ssize_t (*sendpage) (struct socket *sock, struct page *page, | |
167 | int offset, size_t size, int flags); | |
168 | }; | |
169 | ||
170 | struct net_proto_family { | |
171 | int family; | |
172 | int (*create)(struct socket *sock, int protocol); | |
1da177e4 LT |
173 | struct module *owner; |
174 | }; | |
175 | ||
176 | struct iovec; | |
177 | struct kvec; | |
178 | ||
179 | extern int sock_wake_async(struct socket *sk, int how, int band); | |
f0fd27d4 SH |
180 | extern int sock_register(const struct net_proto_family *fam); |
181 | extern void sock_unregister(int family); | |
1da177e4 LT |
182 | extern int sock_create(int family, int type, int proto, |
183 | struct socket **res); | |
184 | extern int sock_create_kern(int family, int type, int proto, | |
185 | struct socket **res); | |
186 | extern int sock_create_lite(int family, int type, int proto, | |
187 | struct socket **res); | |
188 | extern void sock_release(struct socket *sock); | |
189 | extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, | |
190 | size_t len); | |
191 | extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, | |
192 | size_t size, int flags); | |
193 | extern int sock_map_fd(struct socket *sock); | |
194 | extern struct socket *sockfd_lookup(int fd, int *err); | |
195 | #define sockfd_put(sock) fput(sock->file) | |
196 | extern int net_ratelimit(void); | |
aaa248f6 SH |
197 | |
198 | #define net_random() random32() | |
a64b78a0 | 199 | #define net_srandom(seed) srandom32((__force u32)seed) |
1da177e4 LT |
200 | |
201 | extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
202 | struct kvec *vec, size_t num, size_t len); | |
203 | extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, | |
204 | struct kvec *vec, size_t num, | |
205 | size_t len, int flags); | |
206 | ||
ac5a488e SS |
207 | extern int kernel_bind(struct socket *sock, struct sockaddr *addr, |
208 | int addrlen); | |
209 | extern int kernel_listen(struct socket *sock, int backlog); | |
210 | extern int kernel_accept(struct socket *sock, struct socket **newsock, | |
211 | int flags); | |
212 | extern int kernel_connect(struct socket *sock, struct sockaddr *addr, | |
213 | int addrlen, int flags); | |
214 | extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
215 | int *addrlen); | |
216 | extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
217 | int *addrlen); | |
218 | extern int kernel_getsockopt(struct socket *sock, int level, int optname, | |
219 | char *optval, int *optlen); | |
220 | extern int kernel_setsockopt(struct socket *sock, int level, int optname, | |
221 | char *optval, int optlen); | |
222 | extern int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
223 | size_t size, int flags); | |
224 | extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg); | |
225 | ||
1da177e4 LT |
226 | #ifndef CONFIG_SMP |
227 | #define SOCKOPS_WRAPPED(name) name | |
228 | #define SOCKOPS_WRAP(name, fam) | |
229 | #else | |
230 | ||
231 | #define SOCKOPS_WRAPPED(name) __unlocked_##name | |
232 | ||
233 | #define SOCKCALL_WRAP(name, call, parms, args) \ | |
234 | static int __lock_##name##_##call parms \ | |
235 | { \ | |
236 | int ret; \ | |
237 | lock_kernel(); \ | |
238 | ret = __unlocked_##name##_ops.call args ;\ | |
239 | unlock_kernel(); \ | |
240 | return ret; \ | |
241 | } | |
242 | ||
243 | #define SOCKCALL_UWRAP(name, call, parms, args) \ | |
244 | static unsigned int __lock_##name##_##call parms \ | |
245 | { \ | |
246 | int ret; \ | |
247 | lock_kernel(); \ | |
248 | ret = __unlocked_##name##_ops.call args ;\ | |
249 | unlock_kernel(); \ | |
250 | return ret; \ | |
251 | } | |
252 | ||
253 | ||
254 | #define SOCKOPS_WRAP(name, fam) \ | |
255 | SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ | |
256 | SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ | |
257 | (sock, uaddr, addr_len)) \ | |
258 | SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ | |
259 | int addr_len, int flags), \ | |
260 | (sock, uaddr, addr_len, flags)) \ | |
261 | SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ | |
262 | (sock1, sock2)) \ | |
263 | SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ | |
264 | int flags), (sock, newsock, flags)) \ | |
265 | SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ | |
266 | int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ | |
267 | SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ | |
268 | (file, sock, wait)) \ | |
269 | SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ | |
270 | unsigned long arg), (sock, cmd, arg)) \ | |
89bbfc95 SP |
271 | SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \ |
272 | unsigned long arg), (sock, cmd, arg)) \ | |
1da177e4 LT |
273 | SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ |
274 | SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ | |
275 | SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ | |
276 | char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ | |
277 | SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ | |
278 | char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ | |
279 | SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ | |
280 | (iocb, sock, m, len)) \ | |
281 | SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ | |
282 | (iocb, sock, m, len, flags)) \ | |
283 | SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ | |
284 | (file, sock, vma)) \ | |
285 | \ | |
90ddc4f0 | 286 | static const struct proto_ops name##_ops = { \ |
1da177e4 LT |
287 | .family = fam, \ |
288 | .owner = THIS_MODULE, \ | |
289 | .release = __lock_##name##_release, \ | |
290 | .bind = __lock_##name##_bind, \ | |
291 | .connect = __lock_##name##_connect, \ | |
292 | .socketpair = __lock_##name##_socketpair, \ | |
293 | .accept = __lock_##name##_accept, \ | |
294 | .getname = __lock_##name##_getname, \ | |
295 | .poll = __lock_##name##_poll, \ | |
296 | .ioctl = __lock_##name##_ioctl, \ | |
89bbfc95 | 297 | .compat_ioctl = __lock_##name##_compat_ioctl, \ |
1da177e4 LT |
298 | .listen = __lock_##name##_listen, \ |
299 | .shutdown = __lock_##name##_shutdown, \ | |
300 | .setsockopt = __lock_##name##_setsockopt, \ | |
301 | .getsockopt = __lock_##name##_getsockopt, \ | |
302 | .sendmsg = __lock_##name##_sendmsg, \ | |
303 | .recvmsg = __lock_##name##_recvmsg, \ | |
304 | .mmap = __lock_##name##_mmap, \ | |
305 | }; | |
89bbfc95 | 306 | |
1da177e4 LT |
307 | #endif |
308 | ||
309 | #define MODULE_ALIAS_NETPROTO(proto) \ | |
310 | MODULE_ALIAS("net-pf-" __stringify(proto)) | |
311 | ||
4fdb3bb7 HW |
312 | #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ |
313 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) | |
314 | ||
20380731 ACM |
315 | #ifdef CONFIG_SYSCTL |
316 | #include <linux/sysctl.h> | |
317 | extern ctl_table net_table[]; | |
318 | extern int net_msg_cost; | |
319 | extern int net_msg_burst; | |
320 | #endif | |
321 | ||
1da177e4 LT |
322 | #endif /* __KERNEL__ */ |
323 | #endif /* _LINUX_NET_H */ |