1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#ifndef _LINUX_NET_H
19#define _LINUX_NET_H
20
21#include <linux/stringify.h>
22#include <linux/random.h>
23#include <linux/wait.h>
24#include <linux/fcntl.h>
25#include <linux/kmemcheck.h>
26#include <linux/rcupdate.h>
27#include <linux/once.h>
28#include <linux/fs.h>
29
30#include <uapi/linux/net.h>
31
32struct poll_table_struct;
33struct pipe_inode_info;
34struct inode;
35struct file;
36struct net;
37
38
39
40
41
42#define SOCKWQ_ASYNC_NOSPACE 0
43#define SOCKWQ_ASYNC_WAITDATA 1
44#define SOCK_NOSPACE 2
45#define SOCK_PASSCRED 3
46#define SOCK_PASSSEC 4
47
48#ifndef ARCH_HAS_SOCKET_TYPES
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64enum sock_type {
65 SOCK_STREAM = 1,
66 SOCK_DGRAM = 2,
67 SOCK_RAW = 3,
68 SOCK_RDM = 4,
69 SOCK_SEQPACKET = 5,
70 SOCK_DCCP = 6,
71 SOCK_PACKET = 10,
72};
73
74#define SOCK_MAX (SOCK_PACKET + 1)
75
76
77#define SOCK_TYPE_MASK 0xf
78
79
80#define SOCK_CLOEXEC O_CLOEXEC
81#ifndef SOCK_NONBLOCK
82#define SOCK_NONBLOCK O_NONBLOCK
83#endif
84
85#endif
86
87enum sock_shutdown_cmd {
88 SHUT_RD,
89 SHUT_WR,
90 SHUT_RDWR,
91};
92
93struct socket_wq {
94
95 wait_queue_head_t wait;
96 struct fasync_struct *fasync_list;
97 unsigned long flags;
98 struct rcu_head rcu;
99} ____cacheline_aligned_in_smp;
100
101
102
103
104
105
106
107
108
109
110
111struct socket {
112 socket_state state;
113
114 kmemcheck_bitfield_begin(type);
115 short type;
116 kmemcheck_bitfield_end(type);
117
118 unsigned long flags;
119
120 struct socket_wq __rcu *wq;
121
122 struct file *file;
123 struct sock *sk;
124 const struct proto_ops *ops;
125};
126
127struct vm_area_struct;
128struct page;
129struct sockaddr;
130struct msghdr;
131struct module;
132struct sk_buff;
133typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
134 unsigned int, size_t);
135
136struct proto_ops {
137 int family;
138 struct module *owner;
139 int (*release) (struct socket *sock);
140 int (*bind) (struct socket *sock,
141 struct sockaddr *myaddr,
142 int sockaddr_len);
143 int (*connect) (struct socket *sock,
144 struct sockaddr *vaddr,
145 int sockaddr_len, int flags);
146 int (*socketpair)(struct socket *sock1,
147 struct socket *sock2);
148 int (*accept) (struct socket *sock,
149 struct socket *newsock, int flags);
150 int (*getname) (struct socket *sock,
151 struct sockaddr *addr,
152 int *sockaddr_len, int peer);
153 unsigned int (*poll) (struct file *file, struct socket *sock,
154 struct poll_table_struct *wait);
155 int (*ioctl) (struct socket *sock, unsigned int cmd,
156 unsigned long arg);
157#ifdef CONFIG_COMPAT
158 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
159 unsigned long arg);
160#endif
161 int (*listen) (struct socket *sock, int len);
162 int (*shutdown) (struct socket *sock, int flags);
163 int (*setsockopt)(struct socket *sock, int level,
164 int optname, char __user *optval, unsigned int optlen);
165 int (*getsockopt)(struct socket *sock, int level,
166 int optname, char __user *optval, int __user *optlen);
167#ifdef CONFIG_COMPAT
168 int (*compat_setsockopt)(struct socket *sock, int level,
169 int optname, char __user *optval, unsigned int optlen);
170 int (*compat_getsockopt)(struct socket *sock, int level,
171 int optname, char __user *optval, int __user *optlen);
172#endif
173 int (*sendmsg) (struct socket *sock, struct msghdr *m,
174 size_t total_len);
175
176
177
178
179
180
181
182
183 int (*recvmsg) (struct socket *sock, struct msghdr *m,
184 size_t total_len, int flags);
185 int (*mmap) (struct file *file, struct socket *sock,
186 struct vm_area_struct * vma);
187 ssize_t (*sendpage) (struct socket *sock, struct page *page,
188 int offset, size_t size, int flags);
189 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
190 struct pipe_inode_info *pipe, size_t len, unsigned int flags);
191 int (*set_peek_off)(struct sock *sk, int val);
192 int (*peek_len)(struct socket *sock);
193 int (*read_sock)(struct sock *sk, read_descriptor_t *desc,
194 sk_read_actor_t recv_actor);
195};
196
197#define DECLARE_SOCKADDR(type, dst, src) \
198 type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
199
200struct net_proto_family {
201 int family;
202 int (*create)(struct net *net, struct socket *sock,
203 int protocol, int kern);
204 struct module *owner;
205};
206
207struct iovec;
208struct kvec;
209
210enum {
211 SOCK_WAKE_IO,
212 SOCK_WAKE_WAITD,
213 SOCK_WAKE_SPACE,
214 SOCK_WAKE_URG,
215};
216
217int sock_wake_async(struct socket_wq *sk_wq, int how, int band);
218int sock_register(const struct net_proto_family *fam);
219void sock_unregister(int family);
220int __sock_create(struct net *net, int family, int type, int proto,
221 struct socket **res, int kern);
222int sock_create(int family, int type, int proto, struct socket **res);
223int sock_create_kern(struct net *net, int family, int type, int proto, struct socket **res);
224int sock_create_lite(int family, int type, int proto, struct socket **res);
225struct socket *sock_alloc(void);
226void sock_release(struct socket *sock);
227int sock_sendmsg(struct socket *sock, struct msghdr *msg);
228int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags);
229struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname);
230struct socket *sockfd_lookup(int fd, int *err);
231struct socket *sock_from_file(struct file *file, int *err);
232#define sockfd_put(sock) fput(sock->file)
233int net_ratelimit(void);
234
235#define net_ratelimited_function(function, ...) \
236do { \
237 if (net_ratelimit()) \
238 function(__VA_ARGS__); \
239} while (0)
240
241#define net_emerg_ratelimited(fmt, ...) \
242 net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
243#define net_alert_ratelimited(fmt, ...) \
244 net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
245#define net_crit_ratelimited(fmt, ...) \
246 net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
247#define net_err_ratelimited(fmt, ...) \
248 net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
249#define net_notice_ratelimited(fmt, ...) \
250 net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
251#define net_warn_ratelimited(fmt, ...) \
252 net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
253#define net_info_ratelimited(fmt, ...) \
254 net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
255#if defined(CONFIG_DYNAMIC_DEBUG)
256#define net_dbg_ratelimited(fmt, ...) \
257do { \
258 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
259 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
260 net_ratelimit()) \
261 __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
262 ##__VA_ARGS__); \
263} while (0)
264#elif defined(DEBUG)
265#define net_dbg_ratelimited(fmt, ...) \
266 net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
267#else
268#define net_dbg_ratelimited(fmt, ...) \
269 do { \
270 if (0) \
271 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
272 } while (0)
273#endif
274
275#define net_get_random_once(buf, nbytes) \
276 get_random_once((buf), (nbytes))
277
278int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
279 size_t num, size_t len);
280int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
281 size_t num, size_t len, int flags);
282
283int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen);
284int kernel_listen(struct socket *sock, int backlog);
285int kernel_accept(struct socket *sock, struct socket **newsock, int flags);
286int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
287 int flags);
288int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
289 int *addrlen);
290int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
291 int *addrlen);
292int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval,
293 int *optlen);
294int kernel_setsockopt(struct socket *sock, int level, int optname, char *optval,
295 unsigned int optlen);
296int kernel_sendpage(struct socket *sock, struct page *page, int offset,
297 size_t size, int flags);
298int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
299int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);
300
301#define MODULE_ALIAS_NETPROTO(proto) \
302 MODULE_ALIAS("net-pf-" __stringify(proto))
303
304#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
305 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
306
307#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
308 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
309 "-type-" __stringify(type))
310
311#define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
312 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
313 name)
314#endif
315