1 #ifndef _LINUX_SOCKET_H
2 #define _LINUX_SOCKET_H
3
4
5 #include <asm/socket.h> /* arch-dependent defines */
6 #include <linux/sockios.h> /* the SIOCxxx I/O controls */
7 #include <linux/uio.h> /* iovec support */
8 #include <linux/types.h> /* pid_t */
9 #include <linux/compiler.h> /* __user */
10 #include <uapi/linux/socket.h>
11
12 struct pid;
13 struct cred;
14
15 #define __sockaddr_check_size(size) \
16 BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage)))
17
18 #ifdef CONFIG_PROC_FS
19 struct seq_file;
20 extern void socket_seq_show(struct seq_file *seq);
21 #endif
22
23 typedef __kernel_sa_family_t sa_family_t;
24
25 /*
26 * 1003.1g requires sa_family_t and that sa_data is char.
27 */
28
29 struct sockaddr {
30 sa_family_t sa_family; /* address family, AF_xxx */
31 char sa_data[14]; /* 14 bytes of protocol address */
32 };
33
34 struct linger {
35 int l_onoff; /* Linger active */
36 int l_linger; /* How long to linger for */
37 };
38
39 #define sockaddr_storage __kernel_sockaddr_storage
40
41 /*
42 * As we do 4.4BSD message passing we use a 4.4BSD message passing
43 * system, not 4.3. Thus msg_accrights(len) are now missing. They
44 * belong in an obscure libc emulation or the bin.
45 */
46
47 struct msghdr {
48 void *msg_name; /* ptr to socket address structure */
49 int msg_namelen; /* size of socket address structure */
50 struct iov_iter msg_iter; /* data */
51 void *msg_control; /* ancillary data */
52 __kernel_size_t msg_controllen; /* ancillary data buffer length */
53 unsigned int msg_flags; /* flags on received message */
54 struct kiocb *msg_iocb; /* ptr to iocb for async requests */
55 };
56
57 struct user_msghdr {
58 void __user *msg_name; /* ptr to socket address structure */
59 int msg_namelen; /* size of socket address structure */
60 struct iovec __user *msg_iov; /* scatter/gather array */
61 __kernel_size_t msg_iovlen; /* # elements in msg_iov */
62 void __user *msg_control; /* ancillary data */
63 __kernel_size_t msg_controllen; /* ancillary data buffer length */
64 unsigned int msg_flags; /* flags on received message */
65 };
66
67 /* For recvmmsg/sendmmsg */
68 struct mmsghdr {
69 struct user_msghdr msg_hdr;
70 unsigned int msg_len;
71 };
72
73 /*
74 * POSIX 1003.1g - ancillary data object information
75 * Ancillary data consits of a sequence of pairs of
76 * (cmsghdr, cmsg_data[])
77 */
78
79 struct cmsghdr {
80 __kernel_size_t cmsg_len; /* data byte count, including hdr */
81 int cmsg_level; /* originating protocol */
82 int cmsg_type; /* protocol-specific type */
83 };
84
85 /*
86 * Ancillary data object information MACROS
87 * Table 5-14 of POSIX 1003.1g
88 */
89
90 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
91 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
92
93 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
94
95 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
96 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
97 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
98
99 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
100 (struct cmsghdr *)(ctl) : \
101 (struct cmsghdr *)NULL)
102 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
103 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
104 (cmsg)->cmsg_len <= (unsigned long) \
105 ((mhdr)->msg_controllen - \
106 ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
107 #define for_each_cmsghdr(cmsg, msg) \
108 for (cmsg = CMSG_FIRSTHDR(msg); \
109 cmsg; \
110 cmsg = CMSG_NXTHDR(msg, cmsg))
111
112 /*
113 * Get the next cmsg header
114 *
115 * PLEASE, do not touch this function. If you think, that it is
116 * incorrect, grep kernel sources and think about consequences
117 * before trying to improve it.
118 *
119 * Now it always returns valid, not truncated ancillary object
120 * HEADER. But caller still MUST check, that cmsg->cmsg_len is
121 * inside range, given by msg->msg_controllen before using
122 * ancillary object DATA. --ANK (980731)
123 */
124
__cmsg_nxthdr(void * __ctl,__kernel_size_t __size,struct cmsghdr * __cmsg)125 static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
126 struct cmsghdr *__cmsg)
127 {
128 struct cmsghdr * __ptr;
129
130 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
131 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
132 return (struct cmsghdr *)0;
133
134 return __ptr;
135 }
136
cmsg_nxthdr(struct msghdr * __msg,struct cmsghdr * __cmsg)137 static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
138 {
139 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
140 }
141
msg_data_left(struct msghdr * msg)142 static inline size_t msg_data_left(struct msghdr *msg)
143 {
144 return iov_iter_count(&msg->msg_iter);
145 }
146
147 /* "Socket"-level control message types: */
148
149 #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
150 #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
151 #define SCM_SECURITY 0x03 /* rw: security label */
152
153 struct ucred {
154 __u32 pid;
155 __u32 uid;
156 __u32 gid;
157 };
158
159 /* Supported address families. */
160 #define AF_UNSPEC 0
161 #define AF_UNIX 1 /* Unix domain sockets */
162 #define AF_LOCAL 1 /* POSIX name for AF_UNIX */
163 #define AF_INET 2 /* Internet IP Protocol */
164 #define AF_AX25 3 /* Amateur Radio AX.25 */
165 #define AF_IPX 4 /* Novell IPX */
166 #define AF_APPLETALK 5 /* AppleTalk DDP */
167 #define AF_NETROM 6 /* Amateur Radio NET/ROM */
168 #define AF_BRIDGE 7 /* Multiprotocol bridge */
169 #define AF_ATMPVC 8 /* ATM PVCs */
170 #define AF_X25 9 /* Reserved for X.25 project */
171 #define AF_INET6 10 /* IP version 6 */
172 #define AF_ROSE 11 /* Amateur Radio X.25 PLP */
173 #define AF_DECnet 12 /* Reserved for DECnet project */
174 #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
175 #define AF_SECURITY 14 /* Security callback pseudo AF */
176 #define AF_KEY 15 /* PF_KEY key management API */
177 #define AF_NETLINK 16
178 #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
179 #define AF_PACKET 17 /* Packet family */
180 #define AF_ASH 18 /* Ash */
181 #define AF_ECONET 19 /* Acorn Econet */
182 #define AF_ATMSVC 20 /* ATM SVCs */
183 #define AF_RDS 21 /* RDS sockets */
184 #define AF_SNA 22 /* Linux SNA Project (nutters!) */
185 #define AF_IRDA 23 /* IRDA sockets */
186 #define AF_PPPOX 24 /* PPPoX sockets */
187 #define AF_WANPIPE 25 /* Wanpipe API Sockets */
188 #define AF_LLC 26 /* Linux LLC */
189 #define AF_IB 27 /* Native InfiniBand address */
190 #define AF_MPLS 28 /* MPLS */
191 #define AF_CAN 29 /* Controller Area Network */
192 #define AF_TIPC 30 /* TIPC sockets */
193 #define AF_BLUETOOTH 31 /* Bluetooth sockets */
194 #define AF_IUCV 32 /* IUCV sockets */
195 #define AF_RXRPC 33 /* RxRPC sockets */
196 #define AF_ISDN 34 /* mISDN sockets */
197 #define AF_PHONET 35 /* Phonet sockets */
198 #define AF_IEEE802154 36 /* IEEE802154 sockets */
199 #define AF_CAIF 37 /* CAIF sockets */
200 #define AF_ALG 38 /* Algorithm sockets */
201 #define AF_NFC 39 /* NFC sockets */
202 #define AF_VSOCK 40 /* vSockets */
203 #define AF_KCM 41 /* Kernel Connection Multiplexor*/
204 #define AF_QIPCRTR 42 /* Qualcomm IPC Router */
205
206 #define AF_MAX 43 /* For now.. */
207
208 /* Protocol families, same as address families. */
209 #define PF_UNSPEC AF_UNSPEC
210 #define PF_UNIX AF_UNIX
211 #define PF_LOCAL AF_LOCAL
212 #define PF_INET AF_INET
213 #define PF_AX25 AF_AX25
214 #define PF_IPX AF_IPX
215 #define PF_APPLETALK AF_APPLETALK
216 #define PF_NETROM AF_NETROM
217 #define PF_BRIDGE AF_BRIDGE
218 #define PF_ATMPVC AF_ATMPVC
219 #define PF_X25 AF_X25
220 #define PF_INET6 AF_INET6
221 #define PF_ROSE AF_ROSE
222 #define PF_DECnet AF_DECnet
223 #define PF_NETBEUI AF_NETBEUI
224 #define PF_SECURITY AF_SECURITY
225 #define PF_KEY AF_KEY
226 #define PF_NETLINK AF_NETLINK
227 #define PF_ROUTE AF_ROUTE
228 #define PF_PACKET AF_PACKET
229 #define PF_ASH AF_ASH
230 #define PF_ECONET AF_ECONET
231 #define PF_ATMSVC AF_ATMSVC
232 #define PF_RDS AF_RDS
233 #define PF_SNA AF_SNA
234 #define PF_IRDA AF_IRDA
235 #define PF_PPPOX AF_PPPOX
236 #define PF_WANPIPE AF_WANPIPE
237 #define PF_LLC AF_LLC
238 #define PF_IB AF_IB
239 #define PF_MPLS AF_MPLS
240 #define PF_CAN AF_CAN
241 #define PF_TIPC AF_TIPC
242 #define PF_BLUETOOTH AF_BLUETOOTH
243 #define PF_IUCV AF_IUCV
244 #define PF_RXRPC AF_RXRPC
245 #define PF_ISDN AF_ISDN
246 #define PF_PHONET AF_PHONET
247 #define PF_IEEE802154 AF_IEEE802154
248 #define PF_CAIF AF_CAIF
249 #define PF_ALG AF_ALG
250 #define PF_NFC AF_NFC
251 #define PF_VSOCK AF_VSOCK
252 #define PF_KCM AF_KCM
253 #define PF_QIPCRTR AF_QIPCRTR
254 #define PF_MAX AF_MAX
255
256 /* Maximum queue length specifiable by listen. */
257 #define SOMAXCONN 128
258
259 /* Flags we can use with send/ and recv.
260 Added those for 1003.1g not all are supported yet
261 */
262
263 #define MSG_OOB 1
264 #define MSG_PEEK 2
265 #define MSG_DONTROUTE 4
266 #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
267 #define MSG_CTRUNC 8
268 #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
269 #define MSG_TRUNC 0x20
270 #define MSG_DONTWAIT 0x40 /* Nonblocking io */
271 #define MSG_EOR 0x80 /* End of record */
272 #define MSG_WAITALL 0x100 /* Wait for a full request */
273 #define MSG_FIN 0x200
274 #define MSG_SYN 0x400
275 #define MSG_CONFIRM 0x800 /* Confirm path validity */
276 #define MSG_RST 0x1000
277 #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
278 #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
279 #define MSG_MORE 0x8000 /* Sender will send more */
280 #define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */
281 #define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */
282 #define MSG_BATCH 0x40000 /* sendmmsg(): more messages coming */
283 #define MSG_EOF MSG_FIN
284
285 #define MSG_FASTOPEN 0x20000000 /* Send data in TCP SYN */
286 #define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exec for file
287 descriptor received through
288 SCM_RIGHTS */
289 #if defined(CONFIG_COMPAT)
290 #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
291 #else
292 #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
293 #endif
294
295
296 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
297 #define SOL_IP 0
298 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
299 #define SOL_TCP 6
300 #define SOL_UDP 17
301 #define SOL_IPV6 41
302 #define SOL_ICMPV6 58
303 #define SOL_SCTP 132
304 #define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
305 #define SOL_RAW 255
306 #define SOL_IPX 256
307 #define SOL_AX25 257
308 #define SOL_ATALK 258
309 #define SOL_NETROM 259
310 #define SOL_ROSE 260
311 #define SOL_DECNET 261
312 #define SOL_X25 262
313 #define SOL_PACKET 263
314 #define SOL_ATM 264 /* ATM layer (cell level) */
315 #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
316 #define SOL_IRDA 266
317 #define SOL_NETBEUI 267
318 #define SOL_LLC 268
319 #define SOL_DCCP 269
320 #define SOL_NETLINK 270
321 #define SOL_TIPC 271
322 #define SOL_RXRPC 272
323 #define SOL_PPPOL2TP 273
324 #define SOL_BLUETOOTH 274
325 #define SOL_PNPIPE 275
326 #define SOL_RDS 276
327 #define SOL_IUCV 277
328 #define SOL_CAIF 278
329 #define SOL_ALG 279
330 #define SOL_NFC 280
331 #define SOL_KCM 281
332
333 /* IPX options */
334 #define IPX_TYPE 1
335
336 extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);
337 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
338
339 struct timespec;
340
341 /* The __sys_...msg variants allow MSG_CMSG_COMPAT */
342 extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags);
343 extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags);
344 extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
345 unsigned int flags, struct timespec *timeout);
346 extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
347 unsigned int vlen, unsigned int flags);
348 #endif /* _LINUX_SOCKET_H */
349