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