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
7 * Version: @(#)net.h 1.0.3 05/25/93
9 * Authors: Orest Zborowski, <obz@Kodak.COM>
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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.
21 #include <linux/socket.h>
22 #include <asm/socket.h>
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 #define SYS_SENDMMSG 20 /* sys_sendmmsg(2) */
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 */
55 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */
58 #include <linux/stringify.h>
59 #include <linux/random.h>
60 #include <linux/wait.h>
61 #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
62 #include <linux/kmemcheck.h>
63 #include <linux/rcupdate.h>
65 struct poll_table_struct;
66 struct pipe_inode_info;
70 #define SOCK_ASYNC_NOSPACE 0
71 #define SOCK_ASYNC_WAITDATA 1
72 #define SOCK_NOSPACE 2
73 #define SOCK_PASSCRED 3
74 #define SOCK_PASSSEC 4
76 #ifndef ARCH_HAS_SOCKET_TYPES
78 * enum sock_type - Socket types
79 * @SOCK_STREAM: stream (connection) socket
80 * @SOCK_DGRAM: datagram (conn.less) socket
81 * @SOCK_RAW: raw socket
82 * @SOCK_RDM: reliably-delivered message
83 * @SOCK_SEQPACKET: sequential packet socket
84 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
85 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
86 * For writing rarp and other similar things on the user level.
88 * When adding some new socket type please
89 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
90 * overrides this enum for binary compat reasons.
102 #define SOCK_MAX (SOCK_PACKET + 1)
103 /* Mask which covers at least up to SOCK_MASK-1. The
104 * remaining bits are used as flags. */
105 #define SOCK_TYPE_MASK 0xf
107 /* Flags for socket, socketpair, accept4 */
108 #define SOCK_CLOEXEC O_CLOEXEC
109 #ifndef SOCK_NONBLOCK
110 #define SOCK_NONBLOCK O_NONBLOCK
113 #endif /* ARCH_HAS_SOCKET_TYPES */
115 enum sock_shutdown_cmd {
122 /* Note: wait MUST be first field of socket_wq */
123 wait_queue_head_t wait;
124 struct fasync_struct *fasync_list;
126 } ____cacheline_aligned_in_smp;
129 * struct socket - general BSD socket
130 * @state: socket state (%SS_CONNECTED, etc)
131 * @type: socket type (%SOCK_STREAM, etc)
132 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
133 * @ops: protocol specific socket operations
134 * @file: File back pointer for gc
135 * @sk: internal networking protocol agnostic socket representation
136 * @wq: wait queue for several uses
141 kmemcheck_bitfield_begin(type);
143 kmemcheck_bitfield_end(type);
147 struct socket_wq __rcu *wq;
151 const struct proto_ops *ops;
154 struct vm_area_struct;
163 struct module *owner;
164 int (*release) (struct socket *sock);
165 int (*bind) (struct socket *sock,
166 struct sockaddr *myaddr,
168 int (*connect) (struct socket *sock,
169 struct sockaddr *vaddr,
170 int sockaddr_len, int flags);
171 int (*socketpair)(struct socket *sock1,
172 struct socket *sock2);
173 int (*accept) (struct socket *sock,
174 struct socket *newsock, int flags);
175 int (*getname) (struct socket *sock,
176 struct sockaddr *addr,
177 int *sockaddr_len, int peer);
178 unsigned int (*poll) (struct file *file, struct socket *sock,
179 struct poll_table_struct *wait);
180 int (*ioctl) (struct socket *sock, unsigned int cmd,
183 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
186 int (*listen) (struct socket *sock, int len);
187 int (*shutdown) (struct socket *sock, int flags);
188 int (*setsockopt)(struct socket *sock, int level,
189 int optname, char __user *optval, unsigned int optlen);
190 int (*getsockopt)(struct socket *sock, int level,
191 int optname, char __user *optval, int __user *optlen);
193 int (*compat_setsockopt)(struct socket *sock, int level,
194 int optname, char __user *optval, unsigned int optlen);
195 int (*compat_getsockopt)(struct socket *sock, int level,
196 int optname, char __user *optval, int __user *optlen);
198 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
199 struct msghdr *m, size_t total_len);
200 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
201 struct msghdr *m, size_t total_len,
203 int (*mmap) (struct file *file, struct socket *sock,
204 struct vm_area_struct * vma);
205 ssize_t (*sendpage) (struct socket *sock, struct page *page,
206 int offset, size_t size, int flags);
207 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
208 struct pipe_inode_info *pipe, size_t len, unsigned int flags);
209 void (*set_peek_off)(struct sock *sk, int val);
212 #define DECLARE_SOCKADDR(type, dst, src) \
213 type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
215 struct net_proto_family {
217 int (*create)(struct net *net, struct socket *sock,
218 int protocol, int kern);
219 struct module *owner;
232 extern int sock_wake_async(struct socket *sk, int how, int band);
233 extern int sock_register(const struct net_proto_family *fam);
234 extern void sock_unregister(int family);
235 extern int __sock_create(struct net *net, int family, int type, int proto,
236 struct socket **res, int kern);
237 extern int sock_create(int family, int type, int proto,
238 struct socket **res);
239 extern int sock_create_kern(int family, int type, int proto,
240 struct socket **res);
241 extern int sock_create_lite(int family, int type, int proto,
242 struct socket **res);
243 extern void sock_release(struct socket *sock);
244 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
246 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
247 size_t size, int flags);
248 extern int sock_map_fd(struct socket *sock, int flags);
249 extern struct socket *sockfd_lookup(int fd, int *err);
250 #define sockfd_put(sock) fput(sock->file)
251 extern int net_ratelimit(void);
253 #define net_random() random32()
254 #define net_srandom(seed) srandom32((__force u32)seed)
256 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
257 struct kvec *vec, size_t num, size_t len);
258 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
259 struct kvec *vec, size_t num,
260 size_t len, int flags);
262 extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
264 extern int kernel_listen(struct socket *sock, int backlog);
265 extern int kernel_accept(struct socket *sock, struct socket **newsock,
267 extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
268 int addrlen, int flags);
269 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
271 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
273 extern int kernel_getsockopt(struct socket *sock, int level, int optname,
274 char *optval, int *optlen);
275 extern int kernel_setsockopt(struct socket *sock, int level, int optname,
276 char *optval, unsigned int optlen);
277 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
278 size_t size, int flags);
279 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
280 extern int kernel_sock_shutdown(struct socket *sock,
281 enum sock_shutdown_cmd how);
283 #define MODULE_ALIAS_NETPROTO(proto) \
284 MODULE_ALIAS("net-pf-" __stringify(proto))
286 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
287 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
289 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
290 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
291 "-type-" __stringify(type))
293 #endif /* __KERNEL__ */
294 #endif /* _LINUX_NET_H */