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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> | |
10 | * Ross Biro, <bir7@leland.Stanford.Edu> | |
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/config.h> | |
22 | #include <linux/wait.h> | |
23 | #include <linux/stringify.h> | |
24 | #include <asm/socket.h> | |
25 | ||
26 | struct poll_table_struct; | |
27 | struct inode; | |
28 | ||
29 | #define NPROTO 32 /* should be enough for now.. */ | |
30 | ||
31 | #define SYS_SOCKET 1 /* sys_socket(2) */ | |
32 | #define SYS_BIND 2 /* sys_bind(2) */ | |
33 | #define SYS_CONNECT 3 /* sys_connect(2) */ | |
34 | #define SYS_LISTEN 4 /* sys_listen(2) */ | |
35 | #define SYS_ACCEPT 5 /* sys_accept(2) */ | |
36 | #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ | |
37 | #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ | |
38 | #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ | |
39 | #define SYS_SEND 9 /* sys_send(2) */ | |
40 | #define SYS_RECV 10 /* sys_recv(2) */ | |
41 | #define SYS_SENDTO 11 /* sys_sendto(2) */ | |
42 | #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ | |
43 | #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ | |
44 | #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ | |
45 | #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ | |
46 | #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ | |
47 | #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ | |
48 | ||
49 | typedef enum { | |
50 | SS_FREE = 0, /* not allocated */ | |
51 | SS_UNCONNECTED, /* unconnected to any socket */ | |
52 | SS_CONNECTING, /* in process of connecting */ | |
53 | SS_CONNECTED, /* connected to socket */ | |
54 | SS_DISCONNECTING /* in process of disconnecting */ | |
55 | } socket_state; | |
56 | ||
57 | #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ | |
58 | ||
59 | #ifdef __KERNEL__ | |
60 | ||
61 | #define SOCK_ASYNC_NOSPACE 0 | |
62 | #define SOCK_ASYNC_WAITDATA 1 | |
63 | #define SOCK_NOSPACE 2 | |
64 | #define SOCK_PASSCRED 3 | |
65 | ||
66 | #ifndef ARCH_HAS_SOCKET_TYPES | |
4dc3b16b PP |
67 | /** |
68 | * enum sock_type - Socket types | |
69 | * @SOCK_STREAM: stream (connection) socket | |
70 | * @SOCK_DGRAM: datagram (conn.less) socket | |
71 | * @SOCK_RAW: raw socket | |
72 | * @SOCK_RDM: reliably-delivered message | |
73 | * @SOCK_SEQPACKET: sequential packet socket | |
74 | * @SOCK_PACKET: linux specific way of getting packets at the dev level. | |
75 | * For writing rarp and other similar things on the user level. | |
76 | * | |
1da177e4 LT |
77 | * When adding some new socket type please |
78 | * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS | |
79 | * overrides this enum for binary compat reasons. | |
1da177e4 LT |
80 | */ |
81 | enum sock_type { | |
82 | SOCK_STREAM = 1, | |
83 | SOCK_DGRAM = 2, | |
84 | SOCK_RAW = 3, | |
85 | SOCK_RDM = 4, | |
86 | SOCK_SEQPACKET = 5, | |
87 | SOCK_PACKET = 10, | |
88 | }; | |
89 | ||
90 | #define SOCK_MAX (SOCK_PACKET + 1) | |
91 | ||
92 | #endif /* ARCH_HAS_SOCKET_TYPES */ | |
93 | ||
94 | /** | |
95 | * struct socket - general BSD socket | |
4dc3b16b PP |
96 | * @state: socket state (%SS_CONNECTED, etc) |
97 | * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) | |
98 | * @ops: protocol specific socket operations | |
99 | * @fasync_list: Asynchronous wake up list | |
100 | * @file: File back pointer for gc | |
101 | * @sk: internal networking protocol agnostic socket representation | |
102 | * @wait: wait queue for several uses | |
103 | * @type: socket type (%SOCK_STREAM, etc) | |
104 | * @passcred: credentials (used only in Unix Sockets (aka PF_LOCAL)) | |
1da177e4 LT |
105 | */ |
106 | struct socket { | |
107 | socket_state state; | |
108 | unsigned long flags; | |
109 | struct proto_ops *ops; | |
110 | struct fasync_struct *fasync_list; | |
111 | struct file *file; | |
112 | struct sock *sk; | |
113 | wait_queue_head_t wait; | |
114 | short type; | |
115 | }; | |
116 | ||
117 | struct vm_area_struct; | |
118 | struct page; | |
119 | struct kiocb; | |
120 | struct sockaddr; | |
121 | struct msghdr; | |
122 | struct module; | |
123 | ||
124 | struct proto_ops { | |
125 | int family; | |
126 | struct module *owner; | |
127 | int (*release) (struct socket *sock); | |
128 | int (*bind) (struct socket *sock, | |
129 | struct sockaddr *myaddr, | |
130 | int sockaddr_len); | |
131 | int (*connect) (struct socket *sock, | |
132 | struct sockaddr *vaddr, | |
133 | int sockaddr_len, int flags); | |
134 | int (*socketpair)(struct socket *sock1, | |
135 | struct socket *sock2); | |
136 | int (*accept) (struct socket *sock, | |
137 | struct socket *newsock, int flags); | |
138 | int (*getname) (struct socket *sock, | |
139 | struct sockaddr *addr, | |
140 | int *sockaddr_len, int peer); | |
141 | unsigned int (*poll) (struct file *file, struct socket *sock, | |
142 | struct poll_table_struct *wait); | |
143 | int (*ioctl) (struct socket *sock, unsigned int cmd, | |
144 | unsigned long arg); | |
145 | int (*listen) (struct socket *sock, int len); | |
146 | int (*shutdown) (struct socket *sock, int flags); | |
147 | int (*setsockopt)(struct socket *sock, int level, | |
148 | int optname, char __user *optval, int optlen); | |
149 | int (*getsockopt)(struct socket *sock, int level, | |
150 | int optname, char __user *optval, int __user *optlen); | |
151 | int (*sendmsg) (struct kiocb *iocb, struct socket *sock, | |
152 | struct msghdr *m, size_t total_len); | |
153 | int (*recvmsg) (struct kiocb *iocb, struct socket *sock, | |
154 | struct msghdr *m, size_t total_len, | |
155 | int flags); | |
156 | int (*mmap) (struct file *file, struct socket *sock, | |
157 | struct vm_area_struct * vma); | |
158 | ssize_t (*sendpage) (struct socket *sock, struct page *page, | |
159 | int offset, size_t size, int flags); | |
160 | }; | |
161 | ||
162 | struct net_proto_family { | |
163 | int family; | |
164 | int (*create)(struct socket *sock, int protocol); | |
165 | /* These are counters for the number of different methods of | |
166 | each we support */ | |
167 | short authentication; | |
168 | short encryption; | |
169 | short encrypt_net; | |
170 | struct module *owner; | |
171 | }; | |
172 | ||
173 | struct iovec; | |
174 | struct kvec; | |
175 | ||
176 | extern int sock_wake_async(struct socket *sk, int how, int band); | |
177 | extern int sock_register(struct net_proto_family *fam); | |
178 | extern int sock_unregister(int family); | |
179 | extern int sock_create(int family, int type, int proto, | |
180 | struct socket **res); | |
181 | extern int sock_create_kern(int family, int type, int proto, | |
182 | struct socket **res); | |
183 | extern int sock_create_lite(int family, int type, int proto, | |
184 | struct socket **res); | |
185 | extern void sock_release(struct socket *sock); | |
186 | extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, | |
187 | size_t len); | |
188 | extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, | |
189 | size_t size, int flags); | |
190 | extern int sock_map_fd(struct socket *sock); | |
191 | extern struct socket *sockfd_lookup(int fd, int *err); | |
192 | #define sockfd_put(sock) fput(sock->file) | |
193 | extern int net_ratelimit(void); | |
194 | extern unsigned long net_random(void); | |
195 | extern void net_srandom(unsigned long); | |
196 | extern void net_random_init(void); | |
197 | ||
198 | extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
199 | struct kvec *vec, size_t num, size_t len); | |
200 | extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, | |
201 | struct kvec *vec, size_t num, | |
202 | size_t len, int flags); | |
203 | ||
204 | #ifndef CONFIG_SMP | |
205 | #define SOCKOPS_WRAPPED(name) name | |
206 | #define SOCKOPS_WRAP(name, fam) | |
207 | #else | |
208 | ||
209 | #define SOCKOPS_WRAPPED(name) __unlocked_##name | |
210 | ||
211 | #define SOCKCALL_WRAP(name, call, parms, args) \ | |
212 | static int __lock_##name##_##call parms \ | |
213 | { \ | |
214 | int ret; \ | |
215 | lock_kernel(); \ | |
216 | ret = __unlocked_##name##_ops.call args ;\ | |
217 | unlock_kernel(); \ | |
218 | return ret; \ | |
219 | } | |
220 | ||
221 | #define SOCKCALL_UWRAP(name, call, parms, args) \ | |
222 | static unsigned int __lock_##name##_##call parms \ | |
223 | { \ | |
224 | int ret; \ | |
225 | lock_kernel(); \ | |
226 | ret = __unlocked_##name##_ops.call args ;\ | |
227 | unlock_kernel(); \ | |
228 | return ret; \ | |
229 | } | |
230 | ||
231 | ||
232 | #define SOCKOPS_WRAP(name, fam) \ | |
233 | SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ | |
234 | SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ | |
235 | (sock, uaddr, addr_len)) \ | |
236 | SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ | |
237 | int addr_len, int flags), \ | |
238 | (sock, uaddr, addr_len, flags)) \ | |
239 | SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ | |
240 | (sock1, sock2)) \ | |
241 | SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ | |
242 | int flags), (sock, newsock, flags)) \ | |
243 | SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ | |
244 | int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ | |
245 | SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ | |
246 | (file, sock, wait)) \ | |
247 | SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ | |
248 | unsigned long arg), (sock, cmd, arg)) \ | |
249 | SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ | |
250 | SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ | |
251 | SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ | |
252 | char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ | |
253 | SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ | |
254 | char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ | |
255 | SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ | |
256 | (iocb, sock, m, len)) \ | |
257 | SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ | |
258 | (iocb, sock, m, len, flags)) \ | |
259 | SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ | |
260 | (file, sock, vma)) \ | |
261 | \ | |
262 | static struct proto_ops name##_ops = { \ | |
263 | .family = fam, \ | |
264 | .owner = THIS_MODULE, \ | |
265 | .release = __lock_##name##_release, \ | |
266 | .bind = __lock_##name##_bind, \ | |
267 | .connect = __lock_##name##_connect, \ | |
268 | .socketpair = __lock_##name##_socketpair, \ | |
269 | .accept = __lock_##name##_accept, \ | |
270 | .getname = __lock_##name##_getname, \ | |
271 | .poll = __lock_##name##_poll, \ | |
272 | .ioctl = __lock_##name##_ioctl, \ | |
273 | .listen = __lock_##name##_listen, \ | |
274 | .shutdown = __lock_##name##_shutdown, \ | |
275 | .setsockopt = __lock_##name##_setsockopt, \ | |
276 | .getsockopt = __lock_##name##_getsockopt, \ | |
277 | .sendmsg = __lock_##name##_sendmsg, \ | |
278 | .recvmsg = __lock_##name##_recvmsg, \ | |
279 | .mmap = __lock_##name##_mmap, \ | |
280 | }; | |
281 | #endif | |
282 | ||
283 | #define MODULE_ALIAS_NETPROTO(proto) \ | |
284 | MODULE_ALIAS("net-pf-" __stringify(proto)) | |
285 | ||
286 | #endif /* __KERNEL__ */ | |
287 | #endif /* _LINUX_NET_H */ |