1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef _LINUX_SOCKET_H
3 #define _LINUX_SOCKET_H
4
5
6 #include <asm/socket.h> /* arc
7 #include <linux/sockios.h> /* the
8 #include <linux/uio.h> /* iov
9 #include <linux/types.h> /* pid
10 #include <linux/compiler.h> /* __u
11 #include <uapi/linux/socket.h>
12
13 struct file;
14 struct pid;
15 struct cred;
16 struct socket;
17 struct sock;
18 struct sk_buff;
19 struct proto_accept_arg;
20
21 #define __sockaddr_check_size(size) \
22 BUILD_BUG_ON(((size) > sizeof(struct _
23
24 #ifdef CONFIG_PROC_FS
25 struct seq_file;
26 extern void socket_seq_show(struct seq_file *s
27 #endif
28
29 typedef __kernel_sa_family_t sa_family_t;
30
31 /*
32 * 1003.1g requires sa_family_t and that
33 */
34
35 struct sockaddr {
36 sa_family_t sa_family; /* add
37 union {
38 char sa_data_min[14];
39 DECLARE_FLEX_ARRAY(char, sa_da
40 };
41 };
42
43 struct linger {
44 int l_onoff; /* Lin
45 int l_linger; /* How
46 };
47
48 #define sockaddr_storage __kernel_sockaddr_sto
49
50 /*
51 * As we do 4.4BSD message passing we use
52 * system, not 4.3. Thus msg_accrights(le
53 * belong in an obscure libc emulation or
54 */
55
56 struct msghdr {
57 void *msg_name; /* ptr
58 int msg_namelen; /* siz
59
60 int msg_inq; /* out
61
62 struct iov_iter msg_iter; /* dat
63
64 /*
65 * Ancillary data. msg_control_user is
66 * recv* side when msg_control_is_user
67 * buffer used for all other cases.
68 */
69 union {
70 void *msg_control;
71 void __user *msg_control_u
72 };
73 bool msg_control_is_user :
74 bool msg_get_inq : 1;/* ret
75 unsigned int msg_flags; /* fla
76 __kernel_size_t msg_controllen; /* anc
77 struct kiocb *msg_iocb; /* ptr
78 struct ubuf_info *msg_ubuf;
79 int (*sg_from_iter)(struct sk_buff *sk
80 struct iov_iter *f
81 };
82
83 struct user_msghdr {
84 void __user *msg_name;
85 int msg_namelen;
86 struct iovec __user *msg_iov;
87 __kernel_size_t msg_iovlen;
88 void __user *msg_control;
89 __kernel_size_t msg_controllen;
90 unsigned int msg_flags;
91 };
92
93 /* For recvmmsg/sendmmsg */
94 struct mmsghdr {
95 struct user_msghdr msg_hdr;
96 unsigned int msg_len;
97 };
98
99 /*
100 * POSIX 1003.1g - ancillary data object
101 * Ancillary data consists of a sequence
102 * (cmsghdr, cmsg_data[])
103 */
104
105 struct cmsghdr {
106 __kernel_size_t cmsg_len; /* dat
107 int cmsg_level; /* ori
108 int cmsg_type; /* pro
109 };
110
111 /*
112 * Ancillary data object information MACR
113 * Table 5-14 of POSIX 1003.1g
114 */
115
116 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_n
117 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((m
118
119 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-
120
121 #define CMSG_DATA(cmsg) \
122 ((void *)(cmsg) + sizeof(struct cmsghd
123 #define CMSG_USER_DATA(cmsg) \
124 ((void __user *)(cmsg) + sizeof(struct
125 #define CMSG_SPACE(len) (sizeof(struct cmsghdr
126 #define CMSG_LEN(len) (sizeof(struct cmsghdr)
127
128 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= siz
129 (struct cmsg
130 (struct cmsg
131 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHD
132 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len
133 (cmsg)->cmsg_len
134 ((mhdr)->msg_cont
135 ((char *)(cmsg)
136 #define for_each_cmsghdr(cmsg, msg) \
137 for (cmsg = CMSG_FIRSTHDR(msg); \
138 cmsg; \
139 cmsg = CMSG_NXTHDR(msg, cmsg))
140
141 /*
142 * Get the next cmsg header
143 *
144 * PLEASE, do not touch this function. If
145 * incorrect, grep kernel sources and thi
146 * before trying to improve it.
147 *
148 * Now it always returns valid, not trunc
149 * HEADER. But caller still MUST check, t
150 * inside range, given by msg->msg_contro
151 * ancillary object DATA.
152 */
153
154 static inline struct cmsghdr * __cmsg_nxthdr(v
155
156 {
157 struct cmsghdr * __ptr;
158
159 __ptr = (struct cmsghdr*)(((unsigned c
160 if ((unsigned long)((char*)(__ptr+1) -
161 return (struct cmsghdr *)0;
162
163 return __ptr;
164 }
165
166 static inline struct cmsghdr * cmsg_nxthdr (st
167 {
168 return __cmsg_nxthdr(__msg->msg_contro
169 }
170
171 static inline size_t msg_data_left(struct msgh
172 {
173 return iov_iter_count(&msg->msg_iter);
174 }
175
176 /* "Socket"-level control message types: */
177
178 #define SCM_RIGHTS 0x01 /* rw:
179 #define SCM_CREDENTIALS 0x02 /* rw:
180 #define SCM_SECURITY 0x03 /* rw:
181 #define SCM_PIDFD 0x04 /* ro:
182
183 struct ucred {
184 __u32 pid;
185 __u32 uid;
186 __u32 gid;
187 };
188
189 /* Supported address families. */
190 #define AF_UNSPEC 0
191 #define AF_UNIX 1 /* Unix domain
192 #define AF_LOCAL 1 /* POSIX name
193 #define AF_INET 2 /* Internet IP
194 #define AF_AX25 3 /* Amateur Rad
195 #define AF_IPX 4 /* Novell IPX
196 #define AF_APPLETALK 5 /* AppleTalk D
197 #define AF_NETROM 6 /* Amateur Rad
198 #define AF_BRIDGE 7 /* Multiprotoc
199 #define AF_ATMPVC 8 /* ATM PVCs
200 #define AF_X25 9 /* Reserved fo
201 #define AF_INET6 10 /* IP version
202 #define AF_ROSE 11 /* Amateur Rad
203 #define AF_DECnet 12 /* Reserved fo
204 #define AF_NETBEUI 13 /* Reserved fo
205 #define AF_SECURITY 14 /* Security ca
206 #define AF_KEY 15 /* PF_KEY key
207 #define AF_NETLINK 16
208 #define AF_ROUTE AF_NETLINK /* Alias to
209 #define AF_PACKET 17 /* Packet fami
210 #define AF_ASH 18 /* Ash
211 #define AF_ECONET 19 /* Acorn Econe
212 #define AF_ATMSVC 20 /* ATM SVCs
213 #define AF_RDS 21 /* RDS sockets
214 #define AF_SNA 22 /* Linux SNA P
215 #define AF_IRDA 23 /* IRDA socket
216 #define AF_PPPOX 24 /* PPPoX socke
217 #define AF_WANPIPE 25 /* Wanpipe API
218 #define AF_LLC 26 /* Linux LLC
219 #define AF_IB 27 /* Native Infi
220 #define AF_MPLS 28 /* MPLS */
221 #define AF_CAN 29 /* Controller
222 #define AF_TIPC 30 /* TIPC socket
223 #define AF_BLUETOOTH 31 /* Bluetooth s
224 #define AF_IUCV 32 /* IUCV socket
225 #define AF_RXRPC 33 /* RxRPC socke
226 #define AF_ISDN 34 /* mISDN socke
227 #define AF_PHONET 35 /* Phonet sock
228 #define AF_IEEE802154 36 /* IEEE802154
229 #define AF_CAIF 37 /* CAIF socket
230 #define AF_ALG 38 /* Algorithm s
231 #define AF_NFC 39 /* NFC sockets
232 #define AF_VSOCK 40 /* vSockets
233 #define AF_KCM 41 /* Kernel Conn
234 #define AF_QIPCRTR 42 /* Qualcomm IP
235 #define AF_SMC 43 /* smc sockets
236 * PF_SMC prot
237 * reuses AF_I
238 */
239 #define AF_XDP 44 /* XDP sockets
240 #define AF_MCTP 45 /* Management
241 * transport p
242 */
243
244 #define AF_MAX 46 /* For now.. *
245
246 /* Protocol families, same as address families
247 #define PF_UNSPEC AF_UNSPEC
248 #define PF_UNIX AF_UNIX
249 #define PF_LOCAL AF_LOCAL
250 #define PF_INET AF_INET
251 #define PF_AX25 AF_AX25
252 #define PF_IPX AF_IPX
253 #define PF_APPLETALK AF_APPLETALK
254 #define PF_NETROM AF_NETROM
255 #define PF_BRIDGE AF_BRIDGE
256 #define PF_ATMPVC AF_ATMPVC
257 #define PF_X25 AF_X25
258 #define PF_INET6 AF_INET6
259 #define PF_ROSE AF_ROSE
260 #define PF_DECnet AF_DECnet
261 #define PF_NETBEUI AF_NETBEUI
262 #define PF_SECURITY AF_SECURITY
263 #define PF_KEY AF_KEY
264 #define PF_NETLINK AF_NETLINK
265 #define PF_ROUTE AF_ROUTE
266 #define PF_PACKET AF_PACKET
267 #define PF_ASH AF_ASH
268 #define PF_ECONET AF_ECONET
269 #define PF_ATMSVC AF_ATMSVC
270 #define PF_RDS AF_RDS
271 #define PF_SNA AF_SNA
272 #define PF_IRDA AF_IRDA
273 #define PF_PPPOX AF_PPPOX
274 #define PF_WANPIPE AF_WANPIPE
275 #define PF_LLC AF_LLC
276 #define PF_IB AF_IB
277 #define PF_MPLS AF_MPLS
278 #define PF_CAN AF_CAN
279 #define PF_TIPC AF_TIPC
280 #define PF_BLUETOOTH AF_BLUETOOTH
281 #define PF_IUCV AF_IUCV
282 #define PF_RXRPC AF_RXRPC
283 #define PF_ISDN AF_ISDN
284 #define PF_PHONET AF_PHONET
285 #define PF_IEEE802154 AF_IEEE802154
286 #define PF_CAIF AF_CAIF
287 #define PF_ALG AF_ALG
288 #define PF_NFC AF_NFC
289 #define PF_VSOCK AF_VSOCK
290 #define PF_KCM AF_KCM
291 #define PF_QIPCRTR AF_QIPCRTR
292 #define PF_SMC AF_SMC
293 #define PF_XDP AF_XDP
294 #define PF_MCTP AF_MCTP
295 #define PF_MAX AF_MAX
296
297 /* Maximum queue length specifiable by listen.
298 #define SOMAXCONN 4096
299
300 /* Flags we can use with send/ and recv.
301 Added those for 1003.1g not all are support
302 */
303
304 #define MSG_OOB 1
305 #define MSG_PEEK 2
306 #define MSG_DONTROUTE 4
307 #define MSG_TRYHARD 4 /* Synonym for
308 #define MSG_CTRUNC 8
309 #define MSG_PROBE 0x10 /* Do not send
310 #define MSG_TRUNC 0x20
311 #define MSG_DONTWAIT 0x40 /* Nonblocking
312 #define MSG_EOR 0x80 /* End of reco
313 #define MSG_WAITALL 0x100 /* Wait for a
314 #define MSG_FIN 0x200
315 #define MSG_SYN 0x400
316 #define MSG_CONFIRM 0x800 /* Confirm pat
317 #define MSG_RST 0x1000
318 #define MSG_ERRQUEUE 0x2000 /* Fetch messa
319 #define MSG_NOSIGNAL 0x4000 /* Do not gene
320 #define MSG_MORE 0x8000 /* Sender will
321 #define MSG_WAITFORONE 0x10000 /* recvmmsg():
322 #define MSG_SENDPAGE_NOPOLICY 0x10000 /* sendp
323 #define MSG_BATCH 0x40000 /* sendmmsg():
324 #define MSG_EOF MSG_FIN
325 #define MSG_NO_SHARED_FRAGS 0x80000 /* sendpag
326 #define MSG_SENDPAGE_DECRYPTED 0x100000 /* se
327 * pl
328 */
329
330 #define MSG_SOCK_DEVMEM 0x2000000 /* Rec
331 #define MSG_ZEROCOPY 0x4000000 /* Use
332 #define MSG_SPLICE_PAGES 0x8000000 /* Spl
333 #define MSG_FASTOPEN 0x20000000 /* Sen
334 #define MSG_CMSG_CLOEXEC 0x40000000 /* Set
335 des
336 SCM
337 #if defined(CONFIG_COMPAT)
338 #define MSG_CMSG_COMPAT 0x80000000 /* Thi
339 #else
340 #define MSG_CMSG_COMPAT 0 /* We
341 #endif
342
343 /* Flags to be cleared on entry by sendmsg and
344 #define MSG_INTERNAL_SENDMSG_FLAGS \
345 (MSG_SPLICE_PAGES | MSG_SENDPAGE_NOPOL
346
347 /* Setsockoptions(2) level. Thanks to BSD thes
348 #define SOL_IP 0
349 /* #define SOL_ICMP 1 No-no-no! Due
350 #define SOL_TCP 6
351 #define SOL_UDP 17
352 #define SOL_IPV6 41
353 #define SOL_ICMPV6 58
354 #define SOL_SCTP 132
355 #define SOL_UDPLITE 136 /* UDP-Lite (R
356 #define SOL_RAW 255
357 #define SOL_IPX 256
358 #define SOL_AX25 257
359 #define SOL_ATALK 258
360 #define SOL_NETROM 259
361 #define SOL_ROSE 260
362 #define SOL_DECNET 261
363 #define SOL_X25 262
364 #define SOL_PACKET 263
365 #define SOL_ATM 264 /* ATM layer (
366 #define SOL_AAL 265 /* ATM Adaptio
367 #define SOL_IRDA 266
368 #define SOL_NETBEUI 267
369 #define SOL_LLC 268
370 #define SOL_DCCP 269
371 #define SOL_NETLINK 270
372 #define SOL_TIPC 271
373 #define SOL_RXRPC 272
374 #define SOL_PPPOL2TP 273
375 #define SOL_BLUETOOTH 274
376 #define SOL_PNPIPE 275
377 #define SOL_RDS 276
378 #define SOL_IUCV 277
379 #define SOL_CAIF 278
380 #define SOL_ALG 279
381 #define SOL_NFC 280
382 #define SOL_KCM 281
383 #define SOL_TLS 282
384 #define SOL_XDP 283
385 #define SOL_MPTCP 284
386 #define SOL_MCTP 285
387 #define SOL_SMC 286
388 #define SOL_VSOCK 287
389
390 /* IPX options */
391 #define IPX_TYPE 1
392
393 extern int move_addr_to_kernel(void __user *ua
394 extern int put_cmsg(struct msghdr*, int level,
395
396 struct timespec64;
397 struct __kernel_timespec;
398 struct old_timespec32;
399
400 struct scm_timestamping_internal {
401 struct timespec64 ts[3];
402 };
403
404 extern void put_cmsg_scm_timestamping64(struct
405 extern void put_cmsg_scm_timestamping(struct m
406
407 /* The __sys_...msg variants allow MSG_CMSG_CO
408 * forbid_cmsg_compat==false
409 */
410 extern long __sys_recvmsg(int fd, struct user_
411 unsigned int flags,
412 extern long __sys_sendmsg(int fd, struct user_
413 unsigned int flags,
414 extern int __sys_recvmmsg(int fd, struct mmsgh
415 unsigned int vlen, u
416 struct __kernel_time
417 struct old_timespec3
418 extern int __sys_sendmmsg(int fd, struct mmsgh
419 unsigned int vlen, u
420 bool forbid_cmsg_com
421 extern long __sys_sendmsg_sock(struct socket *
422 unsigned int fl
423 extern long __sys_recvmsg_sock(struct socket *
424 struct user_msg
425 struct sockaddr
426 unsigned int fl
427 extern int __copy_msghdr(struct msghdr *kmsg,
428 struct user_msghdr *u
429 struct sockaddr __use
430
431 /* helpers which do the actual work for syscal
432 extern int __sys_recvfrom(int fd, void __user
433 unsigned int flags,
434 int __user *addr_len
435 extern int __sys_sendto(int fd, void __user *b
436 unsigned int flags, st
437 int addr_len);
438 extern struct file *do_accept(struct file *fil
439 struct sockaddr
440 int __user *upee
441 extern int __sys_accept4(int fd, struct sockad
442 int __user *upeer_add
443 extern int __sys_socket(int family, int type,
444 extern struct file *__sys_socket_file(int fami
445 extern int __sys_bind(int fd, struct sockaddr
446 extern int __sys_bind_socket(struct socket *so
447 int addrlen);
448 extern int __sys_connect_file(struct file *fil
449 int addrlen, int
450 extern int __sys_connect(int fd, struct sockad
451 int addrlen);
452 extern int __sys_listen(int fd, int backlog);
453 extern int __sys_listen_socket(struct socket *
454 extern int __sys_getsockname(int fd, struct so
455 int __user *usock
456 extern int __sys_getpeername(int fd, struct so
457 int __user *usock
458 extern int __sys_socketpair(int family, int ty
459 int __user *usockv
460 extern int __sys_shutdown_sock(struct socket *
461 extern int __sys_shutdown(int fd, int how);
462 #endif /* _LINUX_SOCKET_H */
463
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