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 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 */
18
19 #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
20
21 #include <asm/socket.h> /* arch-dependent defines */
22 #include <linux/sockios.h> /* the SIOCxxx I/O controls */
23 #include <linux/uio.h> /* iovec support */
24 #include <linux/types.h> /* pid_t */
25 #include <linux/compiler.h> /* __user */
26
27 #ifdef CONFIG_PROC_FS
28 struct seq_file;
29 extern void socket_seq_show(struct seq_file *seq);
30 #endif
31
32 typedef unsigned short sa_family_t;
33
34 /*
35 * 1003.1g requires sa_family_t and that sa_data is char.
36 */
37
38 struct sockaddr {
39 sa_family_t sa_family; /* address family, AF_xxx */
40 char sa_data[14]; /* 14 bytes of protocol address */
41 };
42
43 struct linger {
44 int l_onoff; /* Linger active */
45 int l_linger; /* How long to linger for */
46 };
47
48 #define sockaddr_storage __kernel_sockaddr_storage
49
50 /*
51 * As we do 4.4BSD message passing we use a 4.4BSD message passing
52 * system, not 4.3. Thus msg_accrights(len) are now missing. They
53 * belong in an obscure libc emulation or the bin.
54 */
55
56 struct msghdr {
57 void * msg_name; /* Socket name */
58 int msg_namelen; /* Length of name */
59 struct iovec * msg_iov; /* Data blocks */
60 __kernel_size_t msg_iovlen; /* Number of blocks */
61 void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
62 __kernel_size_t msg_controllen; /* Length of cmsg list */
63 unsigned msg_flags;
64 };
65
66 /*
67 * POSIX 1003.1g - ancillary data object information
68 * Ancillary data consits of a sequence of pairs of
69 * (cmsghdr, cmsg_data[])
70 */
71
72 struct cmsghdr {
73 __kernel_size_t cmsg_len; /* data byte count, including hdr */
74 int cmsg_level; /* originating protocol */
75 int cmsg_type; /* protocol-specific type */
76 };
77
78 /*
79 * Ancilliary data object information MACROS
80 * Table 5-14 of POSIX 1003.1g
81 */
82
83 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
84 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
85
86 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
87
88 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
89 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
90 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
91
92 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
93 (struct cmsghdr *)(ctl) : \
94 (struct cmsghdr *)NULL)
95 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
96 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
97 (cmsg)->cmsg_len <= (unsigned long) \
98 ((mhdr)->msg_controllen - \
99 ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
100
101 /*
102 * This mess will go away with glibc
103 */
104
105 #ifdef __KERNEL__
106 #define __KINLINE static inline
107 #elif defined(__GNUC__)
108 #define __KINLINE static __inline__
109 #elif defined(__cplusplus)
110 #define __KINLINE static inline
111 #else
112 #define __KINLINE static
113 #endif
114
115
116 /*
117 * Get the next cmsg header
118 *
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.
122 *
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)
127 */
128
__cmsg_nxthdr(void * __ctl,__kernel_size_t __size,struct cmsghdr * __cmsg)129 __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
130 struct cmsghdr *__cmsg)
131 {
132 struct cmsghdr * __ptr;
133
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;
137
138 return __ptr;
139 }
140
cmsg_nxthdr(struct msghdr * __msg,struct cmsghdr * __cmsg)141 __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
142 {
143 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
144 }
145
146 /* "Socket"-level control message types: */
147
148 #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
149 #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
150 #define SCM_SECURITY 0x03 /* rw: security label */
151
152 struct ucred {
153 __u32 pid;
154 __u32 uid;
155 __u32 gid;
156 };
157
158 /* Supported address families. */
159 #define AF_UNSPEC 0
160 #define AF_UNIX 1 /* Unix domain sockets */
161 #define AF_LOCAL 1 /* POSIX name for AF_UNIX */
162 #define AF_INET 2 /* Internet IP Protocol */
163 #define AF_AX25 3 /* Amateur Radio AX.25 */
164 #define AF_IPX 4 /* Novell IPX */
165 #define AF_APPLETALK 5 /* AppleTalk DDP */
166 #define AF_NETROM 6 /* Amateur Radio NET/ROM */
167 #define AF_BRIDGE 7 /* Multiprotocol bridge */
168 #define AF_ATMPVC 8 /* ATM PVCs */
169 #define AF_X25 9 /* Reserved for X.25 project */
170 #define AF_INET6 10 /* IP version 6 */
171 #define AF_ROSE 11 /* Amateur Radio X.25 PLP */
172 #define AF_DECnet 12 /* Reserved for DECnet project */
173 #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
174 #define AF_SECURITY 14 /* Security callback pseudo AF */
175 #define AF_KEY 15 /* PF_KEY key management API */
176 #define AF_NETLINK 16
177 #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
178 #define AF_PACKET 17 /* Packet family */
179 #define AF_ASH 18 /* Ash */
180 #define AF_ECONET 19 /* Acorn Econet */
181 #define AF_ATMSVC 20 /* ATM SVCs */
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_MAX 36 /* For now.. */
195
196 /* Protocol families, same as address families. */
197 #define PF_UNSPEC AF_UNSPEC
198 #define PF_UNIX AF_UNIX
199 #define PF_LOCAL AF_LOCAL
200 #define PF_INET AF_INET
201 #define PF_AX25 AF_AX25
202 #define PF_IPX AF_IPX
203 #define PF_APPLETALK AF_APPLETALK
204 #define PF_NETROM AF_NETROM
205 #define PF_BRIDGE AF_BRIDGE
206 #define PF_ATMPVC AF_ATMPVC
207 #define PF_X25 AF_X25
208 #define PF_INET6 AF_INET6
209 #define PF_ROSE AF_ROSE
210 #define PF_DECnet AF_DECnet
211 #define PF_NETBEUI AF_NETBEUI
212 #define PF_SECURITY AF_SECURITY
213 #define PF_KEY AF_KEY
214 #define PF_NETLINK AF_NETLINK
215 #define PF_ROUTE AF_ROUTE
216 #define PF_PACKET AF_PACKET
217 #define PF_ASH AF_ASH
218 #define PF_ECONET AF_ECONET
219 #define PF_ATMSVC AF_ATMSVC
220 #define PF_SNA AF_SNA
221 #define PF_IRDA AF_IRDA
222 #define PF_PPPOX AF_PPPOX
223 #define PF_WANPIPE AF_WANPIPE
224 #define PF_LLC AF_LLC
225 #define PF_CAN AF_CAN
226 #define PF_TIPC AF_TIPC
227 #define PF_BLUETOOTH AF_BLUETOOTH
228 #define PF_IUCV AF_IUCV
229 #define PF_RXRPC AF_RXRPC
230 #define PF_ISDN AF_ISDN
231 #define PF_PHONET AF_PHONET
232 #define PF_MAX AF_MAX
233
234 /* Maximum queue length specifiable by listen. */
235 #define SOMAXCONN 128
236
237 /* Flags we can use with send/ and recv.
238 Added those for 1003.1g not all are supported yet
239 */
240
241 #define MSG_OOB 1
242 #define MSG_PEEK 2
243 #define MSG_DONTROUTE 4
244 #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
245 #define MSG_CTRUNC 8
246 #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
247 #define MSG_TRUNC 0x20
248 #define MSG_DONTWAIT 0x40 /* Nonblocking io */
249 #define MSG_EOR 0x80 /* End of record */
250 #define MSG_WAITALL 0x100 /* Wait for a full request */
251 #define MSG_FIN 0x200
252 #define MSG_SYN 0x400
253 #define MSG_CONFIRM 0x800 /* Confirm path validity */
254 #define MSG_RST 0x1000
255 #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
256 #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
257 #define MSG_MORE 0x8000 /* Sender will send more */
258
259 #define MSG_EOF MSG_FIN
260
261 #define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exit for file
262 descriptor received through
263 SCM_RIGHTS */
264 #if defined(CONFIG_COMPAT)
265 #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
266 #else
267 #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
268 #endif
269
270
271 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
272 #define SOL_IP 0
273 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
274 #define SOL_TCP 6
275 #define SOL_UDP 17
276 #define SOL_IPV6 41
277 #define SOL_ICMPV6 58
278 #define SOL_SCTP 132
279 #define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
280 #define SOL_RAW 255
281 #define SOL_IPX 256
282 #define SOL_AX25 257
283 #define SOL_ATALK 258
284 #define SOL_NETROM 259
285 #define SOL_ROSE 260
286 #define SOL_DECNET 261
287 #define SOL_X25 262
288 #define SOL_PACKET 263
289 #define SOL_ATM 264 /* ATM layer (cell level) */
290 #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
291 #define SOL_IRDA 266
292 #define SOL_NETBEUI 267
293 #define SOL_LLC 268
294 #define SOL_DCCP 269
295 #define SOL_NETLINK 270
296 #define SOL_TIPC 271
297 #define SOL_RXRPC 272
298 #define SOL_PPPOL2TP 273
299 #define SOL_BLUETOOTH 274
300 #define SOL_PNPIPE 275
301
302 /* IPX options */
303 #define IPX_TYPE 1
304
305 #ifdef __KERNEL__
306 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
307 extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
308 int offset, int len);
309 extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
310 struct iovec *iov,
311 int offset,
312 unsigned int len, __wsum *csump);
313
314 extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode);
315 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
316 extern int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, int __user *ulen);
317 extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr);
318 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
319
320 #endif
321 #endif /* not kernel and not glibc */
322 #endif /* _LINUX_SOCKET_H */
323