1 #ifndef _LINUX_SOCKET_H
2 #define _LINUX_SOCKET_H
3
4 /*
5 * Desired design of maximum size and alignment (see RFC2553)
6 */
7 #define _K_SS_MAXSIZE 128 /* Implementation specific max size */
8 #define _K_SS_ALIGNSIZE (__alignof__ (struct sockaddr *))
9 /* Implementation specific desired alignment */
10
11 typedef unsigned short __kernel_sa_family_t;
12
13 struct __kernel_sockaddr_storage {
14 __kernel_sa_family_t ss_family; /* address family */
15 /* Following field(s) are implementation specific */
16 char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
17 /* space to achieve desired size, */
18 /* _SS_MAXSIZE value minus size of ss_family */
19 } __attribute__ ((aligned(_K_SS_ALIGNSIZE))); /* force desired alignment */
20
21 #ifdef __KERNEL__
22
23 #include <asm/socket.h> /* arch-dependent defines */
24 #include <linux/sockios.h> /* the SIOCxxx I/O controls */
25 #include <linux/uio.h> /* iovec support */
26 #include <linux/types.h> /* pid_t */
27 #include <linux/compiler.h> /* __user */
28
29 struct pid;
30 struct cred;
31
32 #define __sockaddr_check_size(size) \
33 BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage)))
34
35 #ifdef CONFIG_PROC_FS
36 struct seq_file;
37 extern void socket_seq_show(struct seq_file *seq);
38 #endif
39
40 typedef __kernel_sa_family_t sa_family_t;
41
42 /*
43 * 1003.1g requires sa_family_t and that sa_data is char.
44 */
45
46 struct sockaddr {
47 sa_family_t sa_family; /* address family, AF_xxx */
48 char sa_data[14]; /* 14 bytes of protocol address */
49 };
50
51 struct linger {
52 int l_onoff; /* Linger active */
53 int l_linger; /* How long to linger for */
54 };
55
56 #define sockaddr_storage __kernel_sockaddr_storage
57
58 /*
59 * As we do 4.4BSD message passing we use a 4.4BSD message passing
60 * system, not 4.3. Thus msg_accrights(len) are now missing. They
61 * belong in an obscure libc emulation or the bin.
62 */
63
64 struct msghdr {
65 void * msg_name; /* Socket name */
66 int msg_namelen; /* Length of name */
67 struct iovec * msg_iov; /* Data blocks */
68 __kernel_size_t msg_iovlen; /* Number of blocks */
69 void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
70 __kernel_size_t msg_controllen; /* Length of cmsg list */
71 unsigned msg_flags;
72 };
73
74 /* For recvmmsg/sendmmsg */
75 struct mmsghdr {
76 struct msghdr msg_hdr;
77 unsigned msg_len;
78 };
79
80 /*
81 * POSIX 1003.1g - ancillary data object information
82 * Ancillary data consits of a sequence of pairs of
83 * (cmsghdr, cmsg_data[])
84 */
85
86 struct cmsghdr {
87 __kernel_size_t cmsg_len; /* data byte count, including hdr */
88 int cmsg_level; /* originating protocol */
89 int cmsg_type; /* protocol-specific type */
90 };
91
92 /*
93 * Ancillary data object information MACROS
94 * Table 5-14 of POSIX 1003.1g
95 */
96
97 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
98 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
99
100 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
101
102 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
103 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
104 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
105
106 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
107 (struct cmsghdr *)(ctl) : \
108 (struct cmsghdr *)NULL)
109 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
110 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
111 (cmsg)->cmsg_len <= (unsigned long) \
112 ((mhdr)->msg_controllen - \
113 ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
114
115 /*
116 * Get the next cmsg header
117 *
118 * PLEASE, do not touch this function. If you think, that it is
119 * incorrect, grep kernel sources and think about consequences
120 * before trying to improve it.
121 *
122 * Now it always returns valid, not truncated ancillary object
123 * HEADER. But caller still MUST check, that cmsg->cmsg_len is
124 * inside range, given by msg->msg_controllen before using
125 * ancillary object DATA. --ANK (980731)
126 */
127
__cmsg_nxthdr(void * __ctl,__kernel_size_t __size,struct cmsghdr * __cmsg)128 static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
129 struct cmsghdr *__cmsg)
130 {
131 struct cmsghdr * __ptr;
132
133 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
134 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
135 return (struct cmsghdr *)0;
136
137 return __ptr;
138 }
139
cmsg_nxthdr(struct msghdr * __msg,struct cmsghdr * __cmsg)140 static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
141 {
142 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
143 }
144
145 /* "Socket"-level control message types: */
146
147 #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
148 #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
149 #define SCM_SECURITY 0x03 /* rw: security label */
150
151 struct ucred {
152 __u32 pid;
153 __u32 uid;
154 __u32 gid;
155 };
156
157 /* Supported address families. */
158 #define AF_UNSPEC 0
159 #define AF_UNIX 1 /* Unix domain sockets */
160 #define AF_LOCAL 1 /* POSIX name for AF_UNIX */
161 #define AF_INET 2 /* Internet IP Protocol */
162 #define AF_AX25 3 /* Amateur Radio AX.25 */
163 #define AF_IPX 4 /* Novell IPX */
164 #define AF_APPLETALK 5 /* AppleTalk DDP */
165 #define AF_NETROM 6 /* Amateur Radio NET/ROM */
166 #define AF_BRIDGE 7 /* Multiprotocol bridge */
167 #define AF_ATMPVC 8 /* ATM PVCs */
168 #define AF_X25 9 /* Reserved for X.25 project */
169 #define AF_INET6 10 /* IP version 6 */
170 #define AF_ROSE 11 /* Amateur Radio X.25 PLP */
171 #define AF_DECnet 12 /* Reserved for DECnet project */
172 #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
173 #define AF_SECURITY 14 /* Security callback pseudo AF */
174 #define AF_KEY 15 /* PF_KEY key management API */
175 #define AF_NETLINK 16
176 #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
177 #define AF_PACKET 17 /* Packet family */
178 #define AF_ASH 18 /* Ash */
179 #define AF_ECONET 19 /* Acorn Econet */
180 #define AF_ATMSVC 20 /* ATM SVCs */
181 #define AF_RDS 21 /* RDS sockets */
182 #define AF_SNA 22 /* Linux SNA Project (nutters!) */
183 #define AF_IRDA 23 /* IRDA sockets */
184 #define AF_PPPOX 24 /* PPPoX sockets */
185 #define AF_WANPIPE 25 /* Wanpipe API Sockets */
186 #define AF_LLC 26 /* Linux LLC */
187 #define AF_CAN 29 /* Controller Area Network */
188 #define AF_TIPC 30 /* TIPC sockets */
189 #define AF_BLUETOOTH 31 /* Bluetooth sockets */
190 #define AF_IUCV 32 /* IUCV sockets */
191 #define AF_RXRPC 33 /* RxRPC sockets */
192 #define AF_ISDN 34 /* mISDN sockets */
193 #define AF_PHONET 35 /* Phonet sockets */
194 #define AF_IEEE802154 36 /* IEEE802154 sockets */
195 #define AF_CAIF 37 /* CAIF sockets */
196 #define AF_ALG 38 /* Algorithm sockets */
197 #define AF_NFC 39 /* NFC sockets */
198 #define AF_MAX 40 /* For now.. */
199
200 /* Protocol families, same as address families. */
201 #define PF_UNSPEC AF_UNSPEC
202 #define PF_UNIX AF_UNIX
203 #define PF_LOCAL AF_LOCAL
204 #define PF_INET AF_INET
205 #define PF_AX25 AF_AX25
206 #define PF_IPX AF_IPX
207 #define PF_APPLETALK AF_APPLETALK
208 #define PF_NETROM AF_NETROM
209 #define PF_BRIDGE AF_BRIDGE
210 #define PF_ATMPVC AF_ATMPVC
211 #define PF_X25 AF_X25
212 #define PF_INET6 AF_INET6
213 #define PF_ROSE AF_ROSE
214 #define PF_DECnet AF_DECnet
215 #define PF_NETBEUI AF_NETBEUI
216 #define PF_SECURITY AF_SECURITY
217 #define PF_KEY AF_KEY
218 #define PF_NETLINK AF_NETLINK
219 #define PF_ROUTE AF_ROUTE
220 #define PF_PACKET AF_PACKET
221 #define PF_ASH AF_ASH
222 #define PF_ECONET AF_ECONET
223 #define PF_ATMSVC AF_ATMSVC
224 #define PF_RDS AF_RDS
225 #define PF_SNA AF_SNA
226 #define PF_IRDA AF_IRDA
227 #define PF_PPPOX AF_PPPOX
228 #define PF_WANPIPE AF_WANPIPE
229 #define PF_LLC AF_LLC
230 #define PF_CAN AF_CAN
231 #define PF_TIPC AF_TIPC
232 #define PF_BLUETOOTH AF_BLUETOOTH
233 #define PF_IUCV AF_IUCV
234 #define PF_RXRPC AF_RXRPC
235 #define PF_ISDN AF_ISDN
236 #define PF_PHONET AF_PHONET
237 #define PF_IEEE802154 AF_IEEE802154
238 #define PF_CAIF AF_CAIF
239 #define PF_ALG AF_ALG
240 #define PF_NFC AF_NFC
241 #define PF_MAX AF_MAX
242
243 /* Maximum queue length specifiable by listen. */
244 #define SOMAXCONN 128
245
246 /* Flags we can use with send/ and recv.
247 Added those for 1003.1g not all are supported yet
248 */
249
250 #define MSG_OOB 1
251 #define MSG_PEEK 2
252 #define MSG_DONTROUTE 4
253 #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
254 #define MSG_CTRUNC 8
255 #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
256 #define MSG_TRUNC 0x20
257 #define MSG_DONTWAIT 0x40 /* Nonblocking io */
258 #define MSG_EOR 0x80 /* End of record */
259 #define MSG_WAITALL 0x100 /* Wait for a full request */
260 #define MSG_FIN 0x200
261 #define MSG_SYN 0x400
262 #define MSG_CONFIRM 0x800 /* Confirm path validity */
263 #define MSG_RST 0x1000
264 #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
265 #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
266 #define MSG_MORE 0x8000 /* Sender will send more */
267 #define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */
268 #define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */
269 #define MSG_EOF MSG_FIN
270
271 #define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exit for file
272 descriptor received through
273 SCM_RIGHTS */
274 #if defined(CONFIG_COMPAT)
275 #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
276 #else
277 #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
278 #endif
279
280
281 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
282 #define SOL_IP 0
283 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
284 #define SOL_TCP 6
285 #define SOL_UDP 17
286 #define SOL_IPV6 41
287 #define SOL_ICMPV6 58
288 #define SOL_SCTP 132
289 #define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
290 #define SOL_RAW 255
291 #define SOL_IPX 256
292 #define SOL_AX25 257
293 #define SOL_ATALK 258
294 #define SOL_NETROM 259
295 #define SOL_ROSE 260
296 #define SOL_DECNET 261
297 #define SOL_X25 262
298 #define SOL_PACKET 263
299 #define SOL_ATM 264 /* ATM layer (cell level) */
300 #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
301 #define SOL_IRDA 266
302 #define SOL_NETBEUI 267
303 #define SOL_LLC 268
304 #define SOL_DCCP 269
305 #define SOL_NETLINK 270
306 #define SOL_TIPC 271
307 #define SOL_RXRPC 272
308 #define SOL_PPPOL2TP 273
309 #define SOL_BLUETOOTH 274
310 #define SOL_PNPIPE 275
311 #define SOL_RDS 276
312 #define SOL_IUCV 277
313 #define SOL_CAIF 278
314 #define SOL_ALG 279
315
316 /* IPX options */
317 #define IPX_TYPE 1
318
319 extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred,
320 bool use_effective);
321
322 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
323 extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov,
324 int offset, int len);
325 extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
326 struct iovec *iov,
327 int offset,
328 unsigned int len, __wsum *csump);
329
330 extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode);
331 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
332 extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,
333 int offset, int len);
334 extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);
335 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
336
337 struct timespec;
338
339 /* The __sys_...msg variants allow MSG_CMSG_COMPAT */
340 extern long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags);
341 extern long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags);
342 extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
343 unsigned int flags, struct timespec *timeout);
344 extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
345 unsigned int vlen, unsigned int flags);
346 #endif /* not kernel and not glibc */
347 #endif /* _LINUX_SOCKET_H */
348