]>
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) */ |
a2e27255 | 44 | #define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */ |
228e548e | 45 | #define SYS_SENDMMSG 20 /* sys_sendmmsg(2) */ |
1da177e4 LT |
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> |
5770a3fb DW |
60 | #include <linux/wait.h> |
61 | #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */ | |
29a020d3 | 62 | #include <linux/kmemcheck.h> |
43815482 | 63 | #include <linux/rcupdate.h> |
5770a3fb DW |
64 | |
65 | struct poll_table_struct; | |
66 | struct pipe_inode_info; | |
67 | struct inode; | |
68 | struct net; | |
1da177e4 LT |
69 | |
70 | #define SOCK_ASYNC_NOSPACE 0 | |
71 | #define SOCK_ASYNC_WAITDATA 1 | |
72 | #define SOCK_NOSPACE 2 | |
73 | #define SOCK_PASSCRED 3 | |
877ce7c1 | 74 | #define SOCK_PASSSEC 4 |
b09e786b | 75 | #define SOCK_EXTERNALLY_ALLOCATED 5 |
1da177e4 LT |
76 | |
77 | #ifndef ARCH_HAS_SOCKET_TYPES | |
4dc3b16b PP |
78 | /** |
79 | * enum sock_type - Socket types | |
80 | * @SOCK_STREAM: stream (connection) socket | |
81 | * @SOCK_DGRAM: datagram (conn.less) socket | |
82 | * @SOCK_RAW: raw socket | |
83 | * @SOCK_RDM: reliably-delivered message | |
84 | * @SOCK_SEQPACKET: sequential packet socket | |
8f2709b5 | 85 | * @SOCK_DCCP: Datagram Congestion Control Protocol socket |
4dc3b16b PP |
86 | * @SOCK_PACKET: linux specific way of getting packets at the dev level. |
87 | * For writing rarp and other similar things on the user level. | |
88 | * | |
1da177e4 LT |
89 | * When adding some new socket type please |
90 | * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS | |
91 | * overrides this enum for binary compat reasons. | |
1da177e4 LT |
92 | */ |
93 | enum sock_type { | |
94 | SOCK_STREAM = 1, | |
95 | SOCK_DGRAM = 2, | |
96 | SOCK_RAW = 3, | |
97 | SOCK_RDM = 4, | |
98 | SOCK_SEQPACKET = 5, | |
7c657876 | 99 | SOCK_DCCP = 6, |
1da177e4 LT |
100 | SOCK_PACKET = 10, |
101 | }; | |
102 | ||
103 | #define SOCK_MAX (SOCK_PACKET + 1) | |
a677a039 UD |
104 | /* Mask which covers at least up to SOCK_MASK-1. The |
105 | * remaining bits are used as flags. */ | |
106 | #define SOCK_TYPE_MASK 0xf | |
107 | ||
de11defe | 108 | /* Flags for socket, socketpair, accept4 */ |
a677a039 | 109 | #define SOCK_CLOEXEC O_CLOEXEC |
c019bbc6 UD |
110 | #ifndef SOCK_NONBLOCK |
111 | #define SOCK_NONBLOCK O_NONBLOCK | |
112 | #endif | |
1da177e4 LT |
113 | |
114 | #endif /* ARCH_HAS_SOCKET_TYPES */ | |
115 | ||
91cf45f0 TM |
116 | enum sock_shutdown_cmd { |
117 | SHUT_RD = 0, | |
118 | SHUT_WR = 1, | |
119 | SHUT_RDWR = 2, | |
120 | }; | |
121 | ||
43815482 | 122 | struct socket_wq { |
eaefd110 | 123 | /* Note: wait MUST be first field of socket_wq */ |
43815482 ED |
124 | wait_queue_head_t wait; |
125 | struct fasync_struct *fasync_list; | |
126 | struct rcu_head rcu; | |
127 | } ____cacheline_aligned_in_smp; | |
128 | ||
1da177e4 LT |
129 | /** |
130 | * struct socket - general BSD socket | |
4dc3b16b | 131 | * @state: socket state (%SS_CONNECTED, etc) |
2c693610 | 132 | * @type: socket type (%SOCK_STREAM, etc) |
4dc3b16b PP |
133 | * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) |
134 | * @ops: protocol specific socket operations | |
4dc3b16b PP |
135 | * @file: File back pointer for gc |
136 | * @sk: internal networking protocol agnostic socket representation | |
e2aec372 | 137 | * @wq: wait queue for several uses |
1da177e4 LT |
138 | */ |
139 | struct socket { | |
140 | socket_state state; | |
29a020d3 ED |
141 | |
142 | kmemcheck_bitfield_begin(type); | |
2c693610 | 143 | short type; |
29a020d3 ED |
144 | kmemcheck_bitfield_end(type); |
145 | ||
1da177e4 | 146 | unsigned long flags; |
43815482 | 147 | |
eaefd110 | 148 | struct socket_wq __rcu *wq; |
8bdd663a | 149 | |
1da177e4 LT |
150 | struct file *file; |
151 | struct sock *sk; | |
8bdd663a | 152 | const struct proto_ops *ops; |
1da177e4 LT |
153 | }; |
154 | ||
155 | struct vm_area_struct; | |
156 | struct page; | |
157 | struct kiocb; | |
158 | struct sockaddr; | |
159 | struct msghdr; | |
160 | struct module; | |
161 | ||
162 | struct proto_ops { | |
163 | int family; | |
164 | struct module *owner; | |
165 | int (*release) (struct socket *sock); | |
166 | int (*bind) (struct socket *sock, | |
167 | struct sockaddr *myaddr, | |
168 | int sockaddr_len); | |
169 | int (*connect) (struct socket *sock, | |
170 | struct sockaddr *vaddr, | |
171 | int sockaddr_len, int flags); | |
172 | int (*socketpair)(struct socket *sock1, | |
173 | struct socket *sock2); | |
174 | int (*accept) (struct socket *sock, | |
175 | struct socket *newsock, int flags); | |
176 | int (*getname) (struct socket *sock, | |
177 | struct sockaddr *addr, | |
178 | int *sockaddr_len, int peer); | |
179 | unsigned int (*poll) (struct file *file, struct socket *sock, | |
180 | struct poll_table_struct *wait); | |
181 | int (*ioctl) (struct socket *sock, unsigned int cmd, | |
182 | unsigned long arg); | |
1621e094 | 183 | #ifdef CONFIG_COMPAT |
89bbfc95 SP |
184 | int (*compat_ioctl) (struct socket *sock, unsigned int cmd, |
185 | unsigned long arg); | |
1621e094 | 186 | #endif |
1da177e4 LT |
187 | int (*listen) (struct socket *sock, int len); |
188 | int (*shutdown) (struct socket *sock, int flags); | |
189 | int (*setsockopt)(struct socket *sock, int level, | |
b7058842 | 190 | int optname, char __user *optval, unsigned int optlen); |
1da177e4 LT |
191 | int (*getsockopt)(struct socket *sock, int level, |
192 | int optname, char __user *optval, int __user *optlen); | |
1621e094 | 193 | #ifdef CONFIG_COMPAT |
3fdadf7d | 194 | int (*compat_setsockopt)(struct socket *sock, int level, |
b7058842 | 195 | int optname, char __user *optval, unsigned int optlen); |
3fdadf7d DM |
196 | int (*compat_getsockopt)(struct socket *sock, int level, |
197 | int optname, char __user *optval, int __user *optlen); | |
1621e094 | 198 | #endif |
1da177e4 LT |
199 | int (*sendmsg) (struct kiocb *iocb, struct socket *sock, |
200 | struct msghdr *m, size_t total_len); | |
201 | int (*recvmsg) (struct kiocb *iocb, struct socket *sock, | |
202 | struct msghdr *m, size_t total_len, | |
203 | int flags); | |
204 | int (*mmap) (struct file *file, struct socket *sock, | |
205 | struct vm_area_struct * vma); | |
206 | ssize_t (*sendpage) (struct socket *sock, struct page *page, | |
207 | int offset, size_t size, int flags); | |
9c55e01c JA |
208 | ssize_t (*splice_read)(struct socket *sock, loff_t *ppos, |
209 | struct pipe_inode_info *pipe, size_t len, unsigned int flags); | |
ef64a54f | 210 | void (*set_peek_off)(struct sock *sk, int val); |
1da177e4 LT |
211 | }; |
212 | ||
38bfd8f5 CG |
213 | #define DECLARE_SOCKADDR(type, dst, src) \ |
214 | type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; }) | |
215 | ||
1da177e4 LT |
216 | struct net_proto_family { |
217 | int family; | |
3f378b68 EP |
218 | int (*create)(struct net *net, struct socket *sock, |
219 | int protocol, int kern); | |
1da177e4 LT |
220 | struct module *owner; |
221 | }; | |
222 | ||
223 | struct iovec; | |
224 | struct kvec; | |
225 | ||
8d8ad9d7 PE |
226 | enum { |
227 | SOCK_WAKE_IO, | |
228 | SOCK_WAKE_WAITD, | |
229 | SOCK_WAKE_SPACE, | |
230 | SOCK_WAKE_URG, | |
231 | }; | |
232 | ||
1da177e4 | 233 | extern int sock_wake_async(struct socket *sk, int how, int band); |
f0fd27d4 SH |
234 | extern int sock_register(const struct net_proto_family *fam); |
235 | extern void sock_unregister(int family); | |
721db93a PE |
236 | extern int __sock_create(struct net *net, int family, int type, int proto, |
237 | struct socket **res, int kern); | |
1da177e4 LT |
238 | extern int sock_create(int family, int type, int proto, |
239 | struct socket **res); | |
240 | extern int sock_create_kern(int family, int type, int proto, | |
241 | struct socket **res); | |
242 | extern int sock_create_lite(int family, int type, int proto, | |
243 | struct socket **res); | |
244 | extern void sock_release(struct socket *sock); | |
245 | extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, | |
246 | size_t len); | |
247 | extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, | |
248 | size_t size, int flags); | |
a677a039 | 249 | extern int sock_map_fd(struct socket *sock, int flags); |
1da177e4 | 250 | extern struct socket *sockfd_lookup(int fd, int *err); |
406a3c63 | 251 | extern struct socket *sock_from_file(struct file *file, int *err); |
1da177e4 LT |
252 | #define sockfd_put(sock) fput(sock->file) |
253 | extern int net_ratelimit(void); | |
aaa248f6 | 254 | |
3a3bfb61 JP |
255 | #define net_ratelimited_function(function, ...) \ |
256 | do { \ | |
257 | if (net_ratelimit()) \ | |
258 | function(__VA_ARGS__); \ | |
259 | } while (0) | |
260 | ||
261 | #define net_emerg_ratelimited(fmt, ...) \ | |
262 | net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__) | |
263 | #define net_alert_ratelimited(fmt, ...) \ | |
264 | net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__) | |
265 | #define net_crit_ratelimited(fmt, ...) \ | |
266 | net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__) | |
267 | #define net_err_ratelimited(fmt, ...) \ | |
268 | net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__) | |
269 | #define net_notice_ratelimited(fmt, ...) \ | |
270 | net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__) | |
271 | #define net_warn_ratelimited(fmt, ...) \ | |
272 | net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__) | |
273 | #define net_info_ratelimited(fmt, ...) \ | |
274 | net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__) | |
275 | #define net_dbg_ratelimited(fmt, ...) \ | |
276 | net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__) | |
277 | ||
aaa248f6 | 278 | #define net_random() random32() |
a64b78a0 | 279 | #define net_srandom(seed) srandom32((__force u32)seed) |
1da177e4 LT |
280 | |
281 | extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
282 | struct kvec *vec, size_t num, size_t len); | |
283 | extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, | |
284 | struct kvec *vec, size_t num, | |
285 | size_t len, int flags); | |
286 | ||
ac5a488e SS |
287 | extern int kernel_bind(struct socket *sock, struct sockaddr *addr, |
288 | int addrlen); | |
289 | extern int kernel_listen(struct socket *sock, int backlog); | |
290 | extern int kernel_accept(struct socket *sock, struct socket **newsock, | |
291 | int flags); | |
292 | extern int kernel_connect(struct socket *sock, struct sockaddr *addr, | |
293 | int addrlen, int flags); | |
294 | extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
295 | int *addrlen); | |
296 | extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
297 | int *addrlen); | |
298 | extern int kernel_getsockopt(struct socket *sock, int level, int optname, | |
299 | char *optval, int *optlen); | |
300 | extern int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 301 | char *optval, unsigned int optlen); |
ac5a488e SS |
302 | extern int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
303 | size_t size, int flags); | |
304 | extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg); | |
91cf45f0 TM |
305 | extern int kernel_sock_shutdown(struct socket *sock, |
306 | enum sock_shutdown_cmd how); | |
ac5a488e | 307 | |
1da177e4 LT |
308 | #define MODULE_ALIAS_NETPROTO(proto) \ |
309 | MODULE_ALIAS("net-pf-" __stringify(proto)) | |
310 | ||
4fdb3bb7 HW |
311 | #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ |
312 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) | |
313 | ||
305e1e96 JD |
314 | #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \ |
315 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ | |
316 | "-type-" __stringify(type)) | |
317 | ||
2033e9bf NH |
318 | #define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \ |
319 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ | |
320 | name) | |
1da177e4 LT |
321 | #endif /* __KERNEL__ */ |
322 | #endif /* _LINUX_NET_H */ |