Commit | Line | Data |
---|---|---|
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 | ||
0098b727 | 21 | #include <linux/socket.h> |
1da177e4 LT |
22 | #include <asm/socket.h> |
23 | ||
0098b727 | 24 | #define NPROTO AF_MAX |
1da177e4 LT |
25 | |
26 | #define SYS_SOCKET 1 /* sys_socket(2) */ | |
27 | #define SYS_BIND 2 /* sys_bind(2) */ | |
28 | #define SYS_CONNECT 3 /* sys_connect(2) */ | |
29 | #define SYS_LISTEN 4 /* sys_listen(2) */ | |
30 | #define SYS_ACCEPT 5 /* sys_accept(2) */ | |
31 | #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ | |
32 | #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ | |
33 | #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ | |
34 | #define SYS_SEND 9 /* sys_send(2) */ | |
35 | #define SYS_RECV 10 /* sys_recv(2) */ | |
36 | #define SYS_SENDTO 11 /* sys_sendto(2) */ | |
37 | #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ | |
38 | #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ | |
39 | #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ | |
40 | #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ | |
41 | #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ | |
42 | #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ | |
de11defe | 43 | #define SYS_ACCEPT4 18 /* sys_accept4(2) */ |
1da177e4 LT |
44 | |
45 | typedef enum { | |
46 | SS_FREE = 0, /* not allocated */ | |
47 | SS_UNCONNECTED, /* unconnected to any socket */ | |
48 | SS_CONNECTING, /* in process of connecting */ | |
49 | SS_CONNECTED, /* connected to socket */ | |
50 | SS_DISCONNECTING /* in process of disconnecting */ | |
51 | } socket_state; | |
52 | ||
53 | #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ | |
54 | ||
55 | #ifdef __KERNEL__ | |
eacf17bd | 56 | #include <linux/stringify.h> |
cb4db4c2 | 57 | #include <linux/random.h> |
5770a3fb DW |
58 | #include <linux/wait.h> |
59 | #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */ | |
60 | ||
61 | struct poll_table_struct; | |
62 | struct pipe_inode_info; | |
63 | struct inode; | |
64 | struct net; | |
1da177e4 LT |
65 | |
66 | #define SOCK_ASYNC_NOSPACE 0 | |
67 | #define SOCK_ASYNC_WAITDATA 1 | |
68 | #define SOCK_NOSPACE 2 | |
69 | #define SOCK_PASSCRED 3 | |
877ce7c1 | 70 | #define SOCK_PASSSEC 4 |
1da177e4 LT |
71 | |
72 | #ifndef ARCH_HAS_SOCKET_TYPES | |
4dc3b16b PP |
73 | /** |
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 | |
8f2709b5 | 80 | * @SOCK_DCCP: Datagram Congestion Control Protocol socket |
4dc3b16b PP |
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. | |
83 | * | |
1da177e4 LT |
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. | |
1da177e4 LT |
87 | */ |
88 | enum sock_type { | |
89 | SOCK_STREAM = 1, | |
90 | SOCK_DGRAM = 2, | |
91 | SOCK_RAW = 3, | |
92 | SOCK_RDM = 4, | |
93 | SOCK_SEQPACKET = 5, | |
7c657876 | 94 | SOCK_DCCP = 6, |
1da177e4 LT |
95 | SOCK_PACKET = 10, |
96 | }; | |
97 | ||
98 | #define SOCK_MAX (SOCK_PACKET + 1) | |
a677a039 UD |
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 | |
102 | ||
de11defe | 103 | /* Flags for socket, socketpair, accept4 */ |
a677a039 | 104 | #define SOCK_CLOEXEC O_CLOEXEC |
c019bbc6 UD |
105 | #ifndef SOCK_NONBLOCK |
106 | #define SOCK_NONBLOCK O_NONBLOCK | |
107 | #endif | |
1da177e4 LT |
108 | |
109 | #endif /* ARCH_HAS_SOCKET_TYPES */ | |
110 | ||
91cf45f0 TM |
111 | enum sock_shutdown_cmd { |
112 | SHUT_RD = 0, | |
113 | SHUT_WR = 1, | |
114 | SHUT_RDWR = 2, | |
115 | }; | |
116 | ||
1da177e4 LT |
117 | /** |
118 | * struct socket - general BSD socket | |
4dc3b16b | 119 | * @state: socket state (%SS_CONNECTED, etc) |
2c693610 | 120 | * @type: socket type (%SOCK_STREAM, etc) |
4dc3b16b PP |
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 | |
1da177e4 LT |
127 | */ |
128 | struct socket { | |
129 | socket_state state; | |
2c693610 | 130 | short type; |
1da177e4 | 131 | unsigned long flags; |
8bdd663a ED |
132 | /* |
133 | * Please keep fasync_list & wait fields in the same cache line | |
134 | */ | |
1da177e4 | 135 | struct fasync_struct *fasync_list; |
8bdd663a ED |
136 | wait_queue_head_t wait; |
137 | ||
1da177e4 LT |
138 | struct file *file; |
139 | struct sock *sk; | |
8bdd663a | 140 | const struct proto_ops *ops; |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct vm_area_struct; | |
144 | struct page; | |
145 | struct kiocb; | |
146 | struct sockaddr; | |
147 | struct msghdr; | |
148 | struct module; | |
149 | ||
150 | struct proto_ops { | |
151 | int family; | |
152 | struct module *owner; | |
153 | int (*release) (struct socket *sock); | |
154 | int (*bind) (struct socket *sock, | |
155 | struct sockaddr *myaddr, | |
156 | int sockaddr_len); | |
157 | int (*connect) (struct socket *sock, | |
158 | struct sockaddr *vaddr, | |
159 | int sockaddr_len, int flags); | |
160 | int (*socketpair)(struct socket *sock1, | |
161 | struct socket *sock2); | |
162 | int (*accept) (struct socket *sock, | |
163 | struct socket *newsock, int flags); | |
164 | int (*getname) (struct socket *sock, | |
165 | struct sockaddr *addr, | |
166 | int *sockaddr_len, int peer); | |
167 | unsigned int (*poll) (struct file *file, struct socket *sock, | |
168 | struct poll_table_struct *wait); | |
169 | int (*ioctl) (struct socket *sock, unsigned int cmd, | |
170 | unsigned long arg); | |
89bbfc95 SP |
171 | int (*compat_ioctl) (struct socket *sock, unsigned int cmd, |
172 | unsigned long arg); | |
1da177e4 LT |
173 | int (*listen) (struct socket *sock, int len); |
174 | int (*shutdown) (struct socket *sock, int flags); | |
175 | int (*setsockopt)(struct socket *sock, int level, | |
176 | int optname, char __user *optval, int optlen); | |
177 | int (*getsockopt)(struct socket *sock, int level, | |
178 | int optname, char __user *optval, int __user *optlen); | |
3fdadf7d DM |
179 | int (*compat_setsockopt)(struct socket *sock, int level, |
180 | int optname, char __user *optval, int optlen); | |
181 | int (*compat_getsockopt)(struct socket *sock, int level, | |
182 | int optname, char __user *optval, int __user *optlen); | |
1da177e4 LT |
183 | int (*sendmsg) (struct kiocb *iocb, struct socket *sock, |
184 | struct msghdr *m, size_t total_len); | |
185 | int (*recvmsg) (struct kiocb *iocb, struct socket *sock, | |
186 | struct msghdr *m, size_t total_len, | |
187 | int flags); | |
188 | int (*mmap) (struct file *file, struct socket *sock, | |
189 | struct vm_area_struct * vma); | |
190 | ssize_t (*sendpage) (struct socket *sock, struct page *page, | |
191 | int offset, size_t size, int flags); | |
9c55e01c JA |
192 | ssize_t (*splice_read)(struct socket *sock, loff_t *ppos, |
193 | struct pipe_inode_info *pipe, size_t len, unsigned int flags); | |
1da177e4 LT |
194 | }; |
195 | ||
196 | struct net_proto_family { | |
197 | int family; | |
1b8d7ae4 | 198 | int (*create)(struct net *net, struct socket *sock, int protocol); |
1da177e4 LT |
199 | struct module *owner; |
200 | }; | |
201 | ||
202 | struct iovec; | |
203 | struct kvec; | |
204 | ||
8d8ad9d7 PE |
205 | enum { |
206 | SOCK_WAKE_IO, | |
207 | SOCK_WAKE_WAITD, | |
208 | SOCK_WAKE_SPACE, | |
209 | SOCK_WAKE_URG, | |
210 | }; | |
211 | ||
1da177e4 | 212 | extern int sock_wake_async(struct socket *sk, int how, int band); |
f0fd27d4 SH |
213 | extern int sock_register(const struct net_proto_family *fam); |
214 | extern void sock_unregister(int family); | |
1da177e4 LT |
215 | extern int sock_create(int family, int type, int proto, |
216 | struct socket **res); | |
217 | extern int sock_create_kern(int family, int type, int proto, | |
218 | struct socket **res); | |
219 | extern int sock_create_lite(int family, int type, int proto, | |
220 | struct socket **res); | |
221 | extern void sock_release(struct socket *sock); | |
222 | extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, | |
223 | size_t len); | |
224 | extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, | |
225 | size_t size, int flags); | |
a677a039 | 226 | extern int sock_map_fd(struct socket *sock, int flags); |
1da177e4 LT |
227 | extern struct socket *sockfd_lookup(int fd, int *err); |
228 | #define sockfd_put(sock) fput(sock->file) | |
229 | extern int net_ratelimit(void); | |
aaa248f6 SH |
230 | |
231 | #define net_random() random32() | |
a64b78a0 | 232 | #define net_srandom(seed) srandom32((__force u32)seed) |
1da177e4 LT |
233 | |
234 | extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
235 | struct kvec *vec, size_t num, size_t len); | |
236 | extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, | |
237 | struct kvec *vec, size_t num, | |
238 | size_t len, int flags); | |
239 | ||
ac5a488e SS |
240 | extern int kernel_bind(struct socket *sock, struct sockaddr *addr, |
241 | int addrlen); | |
242 | extern int kernel_listen(struct socket *sock, int backlog); | |
243 | extern int kernel_accept(struct socket *sock, struct socket **newsock, | |
244 | int flags); | |
245 | extern int kernel_connect(struct socket *sock, struct sockaddr *addr, | |
246 | int addrlen, int flags); | |
247 | extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
248 | int *addrlen); | |
249 | extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
250 | int *addrlen); | |
251 | extern int kernel_getsockopt(struct socket *sock, int level, int optname, | |
252 | char *optval, int *optlen); | |
253 | extern int kernel_setsockopt(struct socket *sock, int level, int optname, | |
254 | char *optval, int optlen); | |
255 | extern int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
256 | size_t size, int flags); | |
257 | extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg); | |
91cf45f0 TM |
258 | extern int kernel_sock_shutdown(struct socket *sock, |
259 | enum sock_shutdown_cmd how); | |
ac5a488e | 260 | |
1da177e4 LT |
261 | #ifndef CONFIG_SMP |
262 | #define SOCKOPS_WRAPPED(name) name | |
263 | #define SOCKOPS_WRAP(name, fam) | |
264 | #else | |
265 | ||
266 | #define SOCKOPS_WRAPPED(name) __unlocked_##name | |
267 | ||
268 | #define SOCKCALL_WRAP(name, call, parms, args) \ | |
269 | static int __lock_##name##_##call parms \ | |
270 | { \ | |
271 | int ret; \ | |
272 | lock_kernel(); \ | |
273 | ret = __unlocked_##name##_ops.call args ;\ | |
274 | unlock_kernel(); \ | |
275 | return ret; \ | |
276 | } | |
277 | ||
278 | #define SOCKCALL_UWRAP(name, call, parms, args) \ | |
279 | static unsigned int __lock_##name##_##call parms \ | |
280 | { \ | |
281 | int ret; \ | |
282 | lock_kernel(); \ | |
283 | ret = __unlocked_##name##_ops.call args ;\ | |
284 | unlock_kernel(); \ | |
285 | return ret; \ | |
286 | } | |
287 | ||
288 | ||
289 | #define SOCKOPS_WRAP(name, fam) \ | |
290 | SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ | |
291 | SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ | |
292 | (sock, uaddr, addr_len)) \ | |
293 | SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ | |
294 | int addr_len, int flags), \ | |
295 | (sock, uaddr, addr_len, flags)) \ | |
296 | SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ | |
297 | (sock1, sock2)) \ | |
298 | SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ | |
299 | int flags), (sock, newsock, flags)) \ | |
300 | SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ | |
301 | int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ | |
302 | SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ | |
303 | (file, sock, wait)) \ | |
304 | SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ | |
305 | unsigned long arg), (sock, cmd, arg)) \ | |
89bbfc95 SP |
306 | SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \ |
307 | unsigned long arg), (sock, cmd, arg)) \ | |
1da177e4 LT |
308 | SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ |
309 | SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ | |
310 | SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ | |
311 | char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ | |
312 | SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ | |
313 | char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ | |
314 | SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ | |
315 | (iocb, sock, m, len)) \ | |
316 | SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ | |
317 | (iocb, sock, m, len, flags)) \ | |
318 | SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ | |
319 | (file, sock, vma)) \ | |
320 | \ | |
90ddc4f0 | 321 | static const struct proto_ops name##_ops = { \ |
1da177e4 LT |
322 | .family = fam, \ |
323 | .owner = THIS_MODULE, \ | |
324 | .release = __lock_##name##_release, \ | |
325 | .bind = __lock_##name##_bind, \ | |
326 | .connect = __lock_##name##_connect, \ | |
327 | .socketpair = __lock_##name##_socketpair, \ | |
328 | .accept = __lock_##name##_accept, \ | |
329 | .getname = __lock_##name##_getname, \ | |
330 | .poll = __lock_##name##_poll, \ | |
331 | .ioctl = __lock_##name##_ioctl, \ | |
89bbfc95 | 332 | .compat_ioctl = __lock_##name##_compat_ioctl, \ |
1da177e4 LT |
333 | .listen = __lock_##name##_listen, \ |
334 | .shutdown = __lock_##name##_shutdown, \ | |
335 | .setsockopt = __lock_##name##_setsockopt, \ | |
336 | .getsockopt = __lock_##name##_getsockopt, \ | |
337 | .sendmsg = __lock_##name##_sendmsg, \ | |
338 | .recvmsg = __lock_##name##_recvmsg, \ | |
339 | .mmap = __lock_##name##_mmap, \ | |
340 | }; | |
89bbfc95 | 341 | |
1da177e4 LT |
342 | #endif |
343 | ||
344 | #define MODULE_ALIAS_NETPROTO(proto) \ | |
345 | MODULE_ALIAS("net-pf-" __stringify(proto)) | |
346 | ||
4fdb3bb7 HW |
347 | #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ |
348 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) | |
349 | ||
305e1e96 JD |
350 | #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \ |
351 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ | |
352 | "-type-" __stringify(type)) | |
353 | ||
20380731 ACM |
354 | #ifdef CONFIG_SYSCTL |
355 | #include <linux/sysctl.h> | |
717115e1 | 356 | extern struct ratelimit_state net_ratelimit_state; |
20380731 ACM |
357 | #endif |
358 | ||
1da177e4 LT |
359 | #endif /* __KERNEL__ */ |
360 | #endif /* _LINUX_NET_H */ |