Line data Source code
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
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/socket.h>
22 : #include <asm/socket.h>
23 :
24 : #define NPROTO AF_MAX
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) */
43 : #define SYS_ACCEPT4 18 /* sys_accept4(2) */
44 : #define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */
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__
57 : #include <linux/stringify.h>
58 : #include <linux/random.h>
59 : #include <linux/wait.h>
60 : #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
61 : #include <linux/kmemcheck.h>
62 :
63 : struct poll_table_struct;
64 : struct pipe_inode_info;
65 : struct inode;
66 : struct net;
67 :
68 : #define SOCK_ASYNC_NOSPACE 0
69 : #define SOCK_ASYNC_WAITDATA 1
70 : #define SOCK_NOSPACE 2
71 : #define SOCK_PASSCRED 3
72 : #define SOCK_PASSSEC 4
73 :
74 : #ifndef ARCH_HAS_SOCKET_TYPES
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
82 : * @SOCK_DCCP: Datagram Congestion Control Protocol socket
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 : *
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.
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,
96 : SOCK_DCCP = 6,
97 : SOCK_PACKET = 10,
98 : };
99 :
100 : #define SOCK_MAX (SOCK_PACKET + 1)
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 :
105 : /* Flags for socket, socketpair, accept4 */
106 : #define SOCK_CLOEXEC O_CLOEXEC
107 : #ifndef SOCK_NONBLOCK
108 : #define SOCK_NONBLOCK O_NONBLOCK
109 : #endif
110 :
111 : #endif /* ARCH_HAS_SOCKET_TYPES */
112 :
113 : enum sock_shutdown_cmd {
114 : SHUT_RD = 0,
115 : SHUT_WR = 1,
116 : SHUT_RDWR = 2,
117 : };
118 :
119 : /**
120 : * struct socket - general BSD socket
121 : * @state: socket state (%SS_CONNECTED, etc)
122 : * @type: socket type (%SOCK_STREAM, etc)
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
129 : */
130 : struct socket {
131 : socket_state state;
132 :
133 : kmemcheck_bitfield_begin(type);
134 : short type;
135 : kmemcheck_bitfield_end(type);
136 :
137 : unsigned long flags;
138 : /*
139 : * Please keep fasync_list & wait fields in the same cache line
140 : */
141 : struct fasync_struct *fasync_list;
142 : wait_queue_head_t wait;
143 :
144 : struct file *file;
145 : struct sock *sk;
146 : const struct proto_ops *ops;
147 : };
148 1 :
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);
177 : int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
178 : unsigned long arg);
179 : int (*listen) (struct socket *sock, int len);
180 : int (*shutdown) (struct socket *sock, int flags);
181 : int (*setsockopt)(struct socket *sock, int level,
182 : int optname, char __user *optval, unsigned int optlen);
183 : int (*getsockopt)(struct socket *sock, int level,
184 : int optname, char __user *optval, int __user *optlen);
185 : int (*compat_setsockopt)(struct socket *sock, int level,
186 : int optname, char __user *optval, unsigned int optlen);
187 : int (*compat_getsockopt)(struct socket *sock, int level,
188 : int optname, char __user *optval, int __user *optlen);
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);
198 : ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
199 : struct pipe_inode_info *pipe, size_t len, unsigned int flags);
200 : };
201 :
202 : #define DECLARE_SOCKADDR(type, dst, src) \
203 : type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
204 :
205 : struct net_proto_family {
206 : int family;
207 : int (*create)(struct net *net, struct socket *sock,
208 : int protocol, int kern);
209 : struct module *owner;
210 : };
211 :
212 : struct iovec;
213 : struct kvec;
214 :
215 : enum {
216 : SOCK_WAKE_IO,
217 : SOCK_WAKE_WAITD,
218 : SOCK_WAKE_SPACE,
219 : SOCK_WAKE_URG,
220 : };
221 :
222 : extern int sock_wake_async(struct socket *sk, int how, int band);
223 : extern int sock_register(const struct net_proto_family *fam);
224 : extern void sock_unregister(int family);
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);
236 : extern int sock_map_fd(struct socket *sock, int flags);
237 : extern struct socket *sockfd_lookup(int fd, int *err);
238 : #define sockfd_put(sock) fput(sock->file)
239 : extern int net_ratelimit(void);
240 :
241 : #define net_random() random32()
242 : #define net_srandom(seed) srandom32((__force u32)seed)
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 :
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,
264 : char *optval, unsigned int optlen);
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);
268 : extern int kernel_sock_shutdown(struct socket *sock,
269 : enum sock_shutdown_cmd how);
270 :
271 : #define MODULE_ALIAS_NETPROTO(proto) \
272 : MODULE_ALIAS("net-pf-" __stringify(proto))
273 :
274 : #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
275 : MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
276 :
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 :
281 : #ifdef CONFIG_SYSCTL
282 : #include <linux/sysctl.h>
283 : #include <linux/ratelimit.h>
284 : extern struct ratelimit_state net_ratelimit_state;
285 : #endif
286 :
287 : #endif /* __KERNEL__ */
288 : #endif /* _LINUX_NET_H */
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