1 #ifndef _LINUX_SOCKET_H
2 #define _LINUX_SOCKET_H
5 * Desired design of maximum size and alignment (see RFC2553)
7 #define _K_SS_MAXSIZE 128 /* Implementation specific max size */
8 #define _K_SS_ALIGNSIZE (__alignof__ (struct sockaddr *))
9 /* Implementation specific desired alignment */
11 struct __kernel_sockaddr_storage
{
12 unsigned short ss_family
; /* address family */
13 /* Following field(s) are implementation specific */
14 char __data
[_K_SS_MAXSIZE
- sizeof(unsigned short)];
15 /* space to achieve desired size, */
16 /* _SS_MAXSIZE value minus size of ss_family */
17 } __attribute__ ((aligned(_K_SS_ALIGNSIZE
))); /* force desired alignment */
19 #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
21 #include <linux/config.h> /* for CONFIG_COMPAT */
22 #include <linux/linkage.h>
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 */
29 extern int sysctl_somaxconn
;
32 extern void socket_seq_show(struct seq_file
*seq
);
35 typedef unsigned short sa_family_t
;
38 * 1003.1g requires sa_family_t and that sa_data is char.
42 sa_family_t sa_family
; /* address family, AF_xxx */
43 char sa_data
[14]; /* 14 bytes of protocol address */
47 int l_onoff
; /* Linger active */
48 int l_linger
; /* How long to linger for */
51 #define sockaddr_storage __kernel_sockaddr_storage
54 * As we do 4.4BSD message passing we use a 4.4BSD message passing
55 * system, not 4.3. Thus msg_accrights(len) are now missing. They
56 * belong in an obscure libc emulation or the bin.
60 void * msg_name
; /* Socket name */
61 int msg_namelen
; /* Length of name */
62 struct iovec
* msg_iov
; /* Data blocks */
63 __kernel_size_t msg_iovlen
; /* Number of blocks */
64 void * msg_control
; /* Per protocol magic (eg BSD file descriptor passing) */
65 __kernel_size_t msg_controllen
; /* Length of cmsg list */
70 * POSIX 1003.1g - ancillary data object information
71 * Ancillary data consits of a sequence of pairs of
72 * (cmsghdr, cmsg_data[])
76 __kernel_size_t cmsg_len
; /* data byte count, including hdr */
77 int cmsg_level
; /* originating protocol */
78 int cmsg_type
; /* protocol-specific type */
82 * Ancilliary data object information MACROS
83 * Table 5-14 of POSIX 1003.1g
86 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
87 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
89 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
91 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
92 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
93 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
95 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
96 (struct cmsghdr *)(ctl) : \
97 (struct cmsghdr *)NULL)
98 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
99 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
100 (cmsg)->cmsg_len <= (unsigned long) \
101 ((mhdr)->msg_controllen - \
102 ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
105 * This mess will go away with glibc
109 #define __KINLINE static inline
110 #elif defined(__GNUC__)
111 #define __KINLINE static __inline__
112 #elif defined(__cplusplus)
113 #define __KINLINE static inline
115 #define __KINLINE static
120 * Get the next cmsg header
122 * PLEASE, do not touch this function. If you think, that it is
123 * incorrect, grep kernel sources and think about consequences
124 * before trying to improve it.
126 * Now it always returns valid, not truncated ancillary object
127 * HEADER. But caller still MUST check, that cmsg->cmsg_len is
128 * inside range, given by msg->msg_controllen before using
129 * ancillary object DATA. --ANK (980731)
132 __KINLINE
struct cmsghdr
* __cmsg_nxthdr(void *__ctl
, __kernel_size_t __size
,
133 struct cmsghdr
*__cmsg
)
135 struct cmsghdr
* __ptr
;
137 __ptr
= (struct cmsghdr
*)(((unsigned char *) __cmsg
) + CMSG_ALIGN(__cmsg
->cmsg_len
));
138 if ((unsigned long)((char*)(__ptr
+1) - (char *) __ctl
) > __size
)
139 return (struct cmsghdr
*)0;
144 __KINLINE
struct cmsghdr
* cmsg_nxthdr (struct msghdr
*__msg
, struct cmsghdr
*__cmsg
)
146 return __cmsg_nxthdr(__msg
->msg_control
, __msg
->msg_controllen
, __cmsg
);
149 /* "Socket"-level control message types: */
151 #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
152 #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
160 /* Supported address families. */
162 #define AF_UNIX 1 /* Unix domain sockets */
163 #define AF_LOCAL 1 /* POSIX name for AF_UNIX */
164 #define AF_INET 2 /* Internet IP Protocol */
165 #define AF_AX25 3 /* Amateur Radio AX.25 */
166 #define AF_IPX 4 /* Novell IPX */
167 #define AF_APPLETALK 5 /* AppleTalk DDP */
168 #define AF_NETROM 6 /* Amateur Radio NET/ROM */
169 #define AF_BRIDGE 7 /* Multiprotocol bridge */
170 #define AF_ATMPVC 8 /* ATM PVCs */
171 #define AF_X25 9 /* Reserved for X.25 project */
172 #define AF_INET6 10 /* IP version 6 */
173 #define AF_ROSE 11 /* Amateur Radio X.25 PLP */
174 #define AF_DECnet 12 /* Reserved for DECnet project */
175 #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
176 #define AF_SECURITY 14 /* Security callback pseudo AF */
177 #define AF_KEY 15 /* PF_KEY key management API */
178 #define AF_NETLINK 16
179 #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
180 #define AF_PACKET 17 /* Packet family */
181 #define AF_ASH 18 /* Ash */
182 #define AF_ECONET 19 /* Acorn Econet */
183 #define AF_ATMSVC 20 /* ATM SVCs */
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_TIPC 30 /* TIPC sockets */
190 #define AF_BLUETOOTH 31 /* Bluetooth sockets */
191 #define AF_MAX 32 /* For now.. */
193 /* Protocol families, same as address families. */
194 #define PF_UNSPEC AF_UNSPEC
195 #define PF_UNIX AF_UNIX
196 #define PF_LOCAL AF_LOCAL
197 #define PF_INET AF_INET
198 #define PF_AX25 AF_AX25
199 #define PF_IPX AF_IPX
200 #define PF_APPLETALK AF_APPLETALK
201 #define PF_NETROM AF_NETROM
202 #define PF_BRIDGE AF_BRIDGE
203 #define PF_ATMPVC AF_ATMPVC
204 #define PF_X25 AF_X25
205 #define PF_INET6 AF_INET6
206 #define PF_ROSE AF_ROSE
207 #define PF_DECnet AF_DECnet
208 #define PF_NETBEUI AF_NETBEUI
209 #define PF_SECURITY AF_SECURITY
210 #define PF_KEY AF_KEY
211 #define PF_NETLINK AF_NETLINK
212 #define PF_ROUTE AF_ROUTE
213 #define PF_PACKET AF_PACKET
214 #define PF_ASH AF_ASH
215 #define PF_ECONET AF_ECONET
216 #define PF_ATMSVC AF_ATMSVC
217 #define PF_SNA AF_SNA
218 #define PF_IRDA AF_IRDA
219 #define PF_PPPOX AF_PPPOX
220 #define PF_WANPIPE AF_WANPIPE
221 #define PF_LLC AF_LLC
222 #define PF_TIPC AF_TIPC
223 #define PF_BLUETOOTH AF_BLUETOOTH
224 #define PF_MAX AF_MAX
226 /* Maximum queue length specifiable by listen. */
227 #define SOMAXCONN 128
229 /* Flags we can use with send/ and recv.
230 Added those for 1003.1g not all are supported yet
235 #define MSG_DONTROUTE 4
236 #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
238 #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
239 #define MSG_TRUNC 0x20
240 #define MSG_DONTWAIT 0x40 /* Nonblocking io */
241 #define MSG_EOR 0x80 /* End of record */
242 #define MSG_WAITALL 0x100 /* Wait for a full request */
243 #define MSG_FIN 0x200
244 #define MSG_SYN 0x400
245 #define MSG_CONFIRM 0x800 /* Confirm path validity */
246 #define MSG_RST 0x1000
247 #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
248 #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
249 #define MSG_MORE 0x8000 /* Sender will send more */
251 #define MSG_EOF MSG_FIN
253 #if defined(CONFIG_COMPAT)
254 #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
256 #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
260 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
262 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
266 #define SOL_ICMPV6 58
271 #define SOL_ATALK 258
272 #define SOL_NETROM 259
274 #define SOL_DECNET 261
276 #define SOL_PACKET 263
277 #define SOL_ATM 264 /* ATM layer (cell level) */
278 #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
280 #define SOL_NETBEUI 267
283 #define SOL_NETLINK 270
290 extern int memcpy_fromiovec(unsigned char *kdata
, struct iovec
*iov
, int len
);
291 extern int memcpy_fromiovecend(unsigned char *kdata
, struct iovec
*iov
,
292 int offset
, int len
);
293 extern int csum_partial_copy_fromiovecend(unsigned char *kdata
,
296 unsigned int len
, int *csump
);
298 extern int verify_iovec(struct msghdr
*m
, struct iovec
*iov
, char *address
, int mode
);
299 extern int memcpy_toiovec(struct iovec
*v
, unsigned char *kdata
, int len
);
300 extern int move_addr_to_user(void *kaddr
, int klen
, void __user
*uaddr
, int __user
*ulen
);
301 extern int move_addr_to_kernel(void __user
*uaddr
, int ulen
, void *kaddr
);
302 extern int put_cmsg(struct msghdr
*, int level
, int type
, int len
, void *data
);
305 #endif /* not kernel and not glibc */
306 #endif /* _LINUX_SOCKET_H */