Commit | Line | Data |
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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 | ||
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) */ |
1da177e4 LT |
45 | |
46 | typedef enum { | |
47 | SS_FREE = 0, /* not allocated */ | |
48 | SS_UNCONNECTED, /* unconnected to any socket */ | |
49 | SS_CONNECTING, /* in process of connecting */ | |
50 | SS_CONNECTED, /* connected to socket */ | |
51 | SS_DISCONNECTING /* in process of disconnecting */ | |
52 | } socket_state; | |
53 | ||
54 | #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ | |
55 | ||
56 | #ifdef __KERNEL__ | |
eacf17bd | 57 | #include <linux/stringify.h> |
cb4db4c2 | 58 | #include <linux/random.h> |
5770a3fb DW |
59 | #include <linux/wait.h> |
60 | #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */ | |
29a020d3 | 61 | #include <linux/kmemcheck.h> |
5770a3fb DW |
62 | |
63 | struct poll_table_struct; | |
64 | struct pipe_inode_info; | |
65 | struct inode; | |
66 | struct net; | |
1da177e4 LT |
67 | |
68 | #define SOCK_ASYNC_NOSPACE 0 | |
69 | #define SOCK_ASYNC_WAITDATA 1 | |
70 | #define SOCK_NOSPACE 2 | |
71 | #define SOCK_PASSCRED 3 | |
877ce7c1 | 72 | #define SOCK_PASSSEC 4 |
1da177e4 LT |
73 | |
74 | #ifndef ARCH_HAS_SOCKET_TYPES | |
4dc3b16b PP |
75 | /** |
76 | * enum sock_type - Socket types | |
77 | * @SOCK_STREAM: stream (connection) socket | |
78 | * @SOCK_DGRAM: datagram (conn.less) socket | |
79 | * @SOCK_RAW: raw socket | |
80 | * @SOCK_RDM: reliably-delivered message | |
81 | * @SOCK_SEQPACKET: sequential packet socket | |
8f2709b5 | 82 | * @SOCK_DCCP: Datagram Congestion Control Protocol socket |
4dc3b16b PP |
83 | * @SOCK_PACKET: linux specific way of getting packets at the dev level. |
84 | * For writing rarp and other similar things on the user level. | |
85 | * | |
1da177e4 LT |
86 | * When adding some new socket type please |
87 | * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS | |
88 | * overrides this enum for binary compat reasons. | |
1da177e4 LT |
89 | */ |
90 | enum sock_type { | |
91 | SOCK_STREAM = 1, | |
92 | SOCK_DGRAM = 2, | |
93 | SOCK_RAW = 3, | |
94 | SOCK_RDM = 4, | |
95 | SOCK_SEQPACKET = 5, | |
7c657876 | 96 | SOCK_DCCP = 6, |
1da177e4 LT |
97 | SOCK_PACKET = 10, |
98 | }; | |
99 | ||
100 | #define SOCK_MAX (SOCK_PACKET + 1) | |
a677a039 UD |
101 | /* Mask which covers at least up to SOCK_MASK-1. The |
102 | * remaining bits are used as flags. */ | |
103 | #define SOCK_TYPE_MASK 0xf | |
104 | ||
de11defe | 105 | /* Flags for socket, socketpair, accept4 */ |
a677a039 | 106 | #define SOCK_CLOEXEC O_CLOEXEC |
c019bbc6 UD |
107 | #ifndef SOCK_NONBLOCK |
108 | #define SOCK_NONBLOCK O_NONBLOCK | |
109 | #endif | |
1da177e4 LT |
110 | |
111 | #endif /* ARCH_HAS_SOCKET_TYPES */ | |
112 | ||
91cf45f0 TM |
113 | enum sock_shutdown_cmd { |
114 | SHUT_RD = 0, | |
115 | SHUT_WR = 1, | |
116 | SHUT_RDWR = 2, | |
117 | }; | |
118 | ||
1da177e4 LT |
119 | /** |
120 | * struct socket - general BSD socket | |
4dc3b16b | 121 | * @state: socket state (%SS_CONNECTED, etc) |
2c693610 | 122 | * @type: socket type (%SOCK_STREAM, etc) |
4dc3b16b PP |
123 | * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) |
124 | * @ops: protocol specific socket operations | |
125 | * @fasync_list: Asynchronous wake up list | |
126 | * @file: File back pointer for gc | |
127 | * @sk: internal networking protocol agnostic socket representation | |
128 | * @wait: wait queue for several uses | |
1da177e4 LT |
129 | */ |
130 | struct socket { | |
131 | socket_state state; | |
29a020d3 ED |
132 | |
133 | kmemcheck_bitfield_begin(type); | |
2c693610 | 134 | short type; |
29a020d3 ED |
135 | kmemcheck_bitfield_end(type); |
136 | ||
1da177e4 | 137 | unsigned long flags; |
8bdd663a ED |
138 | /* |
139 | * Please keep fasync_list & wait fields in the same cache line | |
140 | */ | |
1da177e4 | 141 | struct fasync_struct *fasync_list; |
8bdd663a ED |
142 | wait_queue_head_t wait; |
143 | ||
1da177e4 LT |
144 | struct file *file; |
145 | struct sock *sk; | |
8bdd663a | 146 | const struct proto_ops *ops; |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct vm_area_struct; | |
150 | struct page; | |
151 | struct kiocb; | |
152 | struct sockaddr; | |
153 | struct msghdr; | |
154 | struct module; | |
155 | ||
156 | struct proto_ops { | |
157 | int family; | |
158 | struct module *owner; | |
159 | int (*release) (struct socket *sock); | |
160 | int (*bind) (struct socket *sock, | |
161 | struct sockaddr *myaddr, | |
162 | int sockaddr_len); | |
163 | int (*connect) (struct socket *sock, | |
164 | struct sockaddr *vaddr, | |
165 | int sockaddr_len, int flags); | |
166 | int (*socketpair)(struct socket *sock1, | |
167 | struct socket *sock2); | |
168 | int (*accept) (struct socket *sock, | |
169 | struct socket *newsock, int flags); | |
170 | int (*getname) (struct socket *sock, | |
171 | struct sockaddr *addr, | |
172 | int *sockaddr_len, int peer); | |
173 | unsigned int (*poll) (struct file *file, struct socket *sock, | |
174 | struct poll_table_struct *wait); | |
175 | int (*ioctl) (struct socket *sock, unsigned int cmd, | |
176 | unsigned long arg); | |
89bbfc95 SP |
177 | int (*compat_ioctl) (struct socket *sock, unsigned int cmd, |
178 | unsigned long arg); | |
1da177e4 LT |
179 | int (*listen) (struct socket *sock, int len); |
180 | int (*shutdown) (struct socket *sock, int flags); | |
181 | int (*setsockopt)(struct socket *sock, int level, | |
b7058842 | 182 | int optname, char __user *optval, unsigned int optlen); |
1da177e4 LT |
183 | int (*getsockopt)(struct socket *sock, int level, |
184 | int optname, char __user *optval, int __user *optlen); | |
3fdadf7d | 185 | int (*compat_setsockopt)(struct socket *sock, int level, |
b7058842 | 186 | int optname, char __user *optval, unsigned int optlen); |
3fdadf7d DM |
187 | int (*compat_getsockopt)(struct socket *sock, int level, |
188 | int optname, char __user *optval, int __user *optlen); | |
1da177e4 LT |
189 | int (*sendmsg) (struct kiocb *iocb, struct socket *sock, |
190 | struct msghdr *m, size_t total_len); | |
191 | int (*recvmsg) (struct kiocb *iocb, struct socket *sock, | |
192 | struct msghdr *m, size_t total_len, | |
193 | int flags); | |
194 | int (*mmap) (struct file *file, struct socket *sock, | |
195 | struct vm_area_struct * vma); | |
196 | ssize_t (*sendpage) (struct socket *sock, struct page *page, | |
197 | int offset, size_t size, int flags); | |
9c55e01c JA |
198 | ssize_t (*splice_read)(struct socket *sock, loff_t *ppos, |
199 | struct pipe_inode_info *pipe, size_t len, unsigned int flags); | |
1da177e4 LT |
200 | }; |
201 | ||
38bfd8f5 CG |
202 | #define DECLARE_SOCKADDR(type, dst, src) \ |
203 | type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; }) | |
204 | ||
1da177e4 LT |
205 | struct net_proto_family { |
206 | int family; | |
3f378b68 EP |
207 | int (*create)(struct net *net, struct socket *sock, |
208 | int protocol, int kern); | |
1da177e4 LT |
209 | struct module *owner; |
210 | }; | |
211 | ||
212 | struct iovec; | |
213 | struct kvec; | |
214 | ||
8d8ad9d7 PE |
215 | enum { |
216 | SOCK_WAKE_IO, | |
217 | SOCK_WAKE_WAITD, | |
218 | SOCK_WAKE_SPACE, | |
219 | SOCK_WAKE_URG, | |
220 | }; | |
221 | ||
1da177e4 | 222 | extern int sock_wake_async(struct socket *sk, int how, int band); |
f0fd27d4 SH |
223 | extern int sock_register(const struct net_proto_family *fam); |
224 | extern void sock_unregister(int family); | |
1da177e4 LT |
225 | extern int sock_create(int family, int type, int proto, |
226 | struct socket **res); | |
227 | extern int sock_create_kern(int family, int type, int proto, | |
228 | struct socket **res); | |
229 | extern int sock_create_lite(int family, int type, int proto, | |
230 | struct socket **res); | |
231 | extern void sock_release(struct socket *sock); | |
232 | extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, | |
233 | size_t len); | |
234 | extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, | |
235 | size_t size, int flags); | |
a677a039 | 236 | extern int sock_map_fd(struct socket *sock, int flags); |
1da177e4 LT |
237 | extern struct socket *sockfd_lookup(int fd, int *err); |
238 | #define sockfd_put(sock) fput(sock->file) | |
239 | extern int net_ratelimit(void); | |
aaa248f6 SH |
240 | |
241 | #define net_random() random32() | |
a64b78a0 | 242 | #define net_srandom(seed) srandom32((__force u32)seed) |
1da177e4 LT |
243 | |
244 | extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
245 | struct kvec *vec, size_t num, size_t len); | |
246 | extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, | |
247 | struct kvec *vec, size_t num, | |
248 | size_t len, int flags); | |
249 | ||
ac5a488e SS |
250 | extern int kernel_bind(struct socket *sock, struct sockaddr *addr, |
251 | int addrlen); | |
252 | extern int kernel_listen(struct socket *sock, int backlog); | |
253 | extern int kernel_accept(struct socket *sock, struct socket **newsock, | |
254 | int flags); | |
255 | extern int kernel_connect(struct socket *sock, struct sockaddr *addr, | |
256 | int addrlen, int flags); | |
257 | extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
258 | int *addrlen); | |
259 | extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
260 | int *addrlen); | |
261 | extern int kernel_getsockopt(struct socket *sock, int level, int optname, | |
262 | char *optval, int *optlen); | |
263 | extern int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 264 | char *optval, unsigned int optlen); |
ac5a488e SS |
265 | extern int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
266 | size_t size, int flags); | |
267 | extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg); | |
91cf45f0 TM |
268 | extern int kernel_sock_shutdown(struct socket *sock, |
269 | enum sock_shutdown_cmd how); | |
ac5a488e | 270 | |
1da177e4 LT |
271 | #define MODULE_ALIAS_NETPROTO(proto) \ |
272 | MODULE_ALIAS("net-pf-" __stringify(proto)) | |
273 | ||
4fdb3bb7 HW |
274 | #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ |
275 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) | |
276 | ||
305e1e96 JD |
277 | #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \ |
278 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ | |
279 | "-type-" __stringify(type)) | |
280 | ||
20380731 ACM |
281 | #ifdef CONFIG_SYSCTL |
282 | #include <linux/sysctl.h> | |
3fff4c42 | 283 | #include <linux/ratelimit.h> |
717115e1 | 284 | extern struct ratelimit_state net_ratelimit_state; |
20380731 ACM |
285 | #endif |
286 | ||
1da177e4 LT |
287 | #endif /* __KERNEL__ */ |
288 | #endif /* _LINUX_NET_H */ |