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 extern int sysctl_somaxconn;
28 #ifdef CONFIG_PROC_FS
29 struct seq_file;
30 extern void socket_seq_show(struct seq_file *seq);
31 #endif
32
33 typedef unsigned short sa_family_t;
34
35 /*
36 * 1003.1g requires sa_family_t and that sa_data is char.
37 */
38
39 struct sockaddr {
40 sa_family_t sa_family; /* address family, AF_xxx */
41 char sa_data[14]; /* 14 bytes of protocol address */
42 };
43
44 struct linger {
45 int l_onoff; /* Linger active */
46 int l_linger; /* How long to linger for */
47 };
48
49 #define sockaddr_storage __kernel_sockaddr_storage
50
51 /*
52 * As we do 4.4BSD message passing we use a 4.4BSD message passing
53 * system, not 4.3. Thus msg_accrights(len) are now missing. They
54 * belong in an obscure libc emulation or the bin.
55 */
56
57 struct msghdr {
58 void * msg_name; /* Socket name */
59 int msg_namelen; /* Length of name */
60 struct iovec * msg_iov; /* Data blocks */
61 __kernel_size_t msg_iovlen; /* Number of blocks */
62 void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
63 __kernel_size_t msg_controllen; /* Length of cmsg list */
64 unsigned msg_flags;
65 };
66
67 /*
68 * POSIX 1003.1g - ancillary data object information
69 * Ancillary data consits of a sequence of pairs of
70 * (cmsghdr, cmsg_data[])
71 */
72
73 struct cmsghdr {
74 __kernel_size_t cmsg_len; /* data byte count, including hdr */
75 int cmsg_level; /* originating protocol */
76 int cmsg_type; /* protocol-specific type */
77 };
78
79 /*
80 * Ancilliary data object information MACROS
81 * Table 5-14 of POSIX 1003.1g
82 */
83
84 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
85 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
86
87 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
88
89 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
90 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
91 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
92
93 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
94 (struct cmsghdr *)(ctl) : \
95 (struct cmsghdr *)NULL)
96 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
97 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
98 (cmsg)->cmsg_len <= (unsigned long) \
99 ((mhdr)->msg_controllen - \
100 ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
101
102 /*
103 * This mess will go away with glibc
104 */
105
106 #ifdef __KERNEL__
107 #define __KINLINE static inline
108 #elif defined(__GNUC__)
109 #define __KINLINE static __inline__
110 #elif defined(__cplusplus)
111 #define __KINLINE static inline
112 #else
113 #define __KINLINE static
114 #endif
115
116
117 /*
118 * Get the next cmsg header
119 *
120 * PLEASE, do not touch this function. If you think, that it is
121 * incorrect, grep kernel sources and think about consequences
122 * before trying to improve it.
123 *
124 * Now it always returns valid, not truncated ancillary object
125 * HEADER. But caller still MUST check, that cmsg->cmsg_len is
126 * inside range, given by msg->msg_controllen before using
127 * ancillary object DATA. --ANK (980731)
128 */
129
__cmsg_nxthdr(void * __ctl,__kernel_size_t __size,struct cmsghdr * __cmsg)130 __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
131 struct cmsghdr *__cmsg)
132 {
133 struct cmsghdr * __ptr;
134
135 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
136 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
137 return (struct cmsghdr *)0;
138
139 return __ptr;
140 }
141
cmsg_nxthdr(struct msghdr * __msg,struct cmsghdr * __cmsg)142 __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
143 {
144 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
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_SNA 22 /* Linux SNA Project (nutters!) */
184 #define AF_IRDA 23 /* IRDA sockets */
185 #define AF_PPPOX 24 /* PPPoX sockets */
186 #define AF_WANPIPE 25 /* Wanpipe API Sockets */
187 #define AF_LLC 26 /* Linux LLC */
188 #define AF_TIPC 30 /* TIPC sockets */
189 #define AF_BLUETOOTH 31 /* Bluetooth sockets */
190 #define AF_MAX 32 /* For now.. */
191
192 /* Protocol families, same as address families. */
193 #define PF_UNSPEC AF_UNSPEC
194 #define PF_UNIX AF_UNIX
195 #define PF_LOCAL AF_LOCAL
196 #define PF_INET AF_INET
197 #define PF_AX25 AF_AX25
198 #define PF_IPX AF_IPX
199 #define PF_APPLETALK AF_APPLETALK
200 #define PF_NETROM AF_NETROM
201 #define PF_BRIDGE AF_BRIDGE
202 #define PF_ATMPVC AF_ATMPVC
203 #define PF_X25 AF_X25
204 #define PF_INET6 AF_INET6
205 #define PF_ROSE AF_ROSE
206 #define PF_DECnet AF_DECnet
207 #define PF_NETBEUI AF_NETBEUI
208 #define PF_SECURITY AF_SECURITY
209 #define PF_KEY AF_KEY
210 #define PF_NETLINK AF_NETLINK
211 #define PF_ROUTE AF_ROUTE
212 #define PF_PACKET AF_PACKET
213 #define PF_ASH AF_ASH
214 #define PF_ECONET AF_ECONET
215 #define PF_ATMSVC AF_ATMSVC
216 #define PF_SNA AF_SNA
217 #define PF_IRDA AF_IRDA
218 #define PF_PPPOX AF_PPPOX
219 #define PF_WANPIPE AF_WANPIPE
220 #define PF_LLC AF_LLC
221 #define PF_TIPC AF_TIPC
222 #define PF_BLUETOOTH AF_BLUETOOTH
223 #define PF_MAX AF_MAX
224
225 /* Maximum queue length specifiable by listen. */
226 #define SOMAXCONN 128
227
228 /* Flags we can use with send/ and recv.
229 Added those for 1003.1g not all are supported yet
230 */
231
232 #define MSG_OOB 1
233 #define MSG_PEEK 2
234 #define MSG_DONTROUTE 4
235 #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
236 #define MSG_CTRUNC 8
237 #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
238 #define MSG_TRUNC 0x20
239 #define MSG_DONTWAIT 0x40 /* Nonblocking io */
240 #define MSG_EOR 0x80 /* End of record */
241 #define MSG_WAITALL 0x100 /* Wait for a full request */
242 #define MSG_FIN 0x200
243 #define MSG_SYN 0x400
244 #define MSG_CONFIRM 0x800 /* Confirm path validity */
245 #define MSG_RST 0x1000
246 #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
247 #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
248 #define MSG_MORE 0x8000 /* Sender will send more */
249
250 #define MSG_EOF MSG_FIN
251
252 #if defined(CONFIG_COMPAT)
253 #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
254 #else
255 #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
256 #endif
257
258
259 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
260 #define SOL_IP 0
261 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
262 #define SOL_TCP 6
263 #define SOL_UDP 17
264 #define SOL_IPV6 41
265 #define SOL_ICMPV6 58
266 #define SOL_SCTP 132
267 #define SOL_RAW 255
268 #define SOL_IPX 256
269 #define SOL_AX25 257
270 #define SOL_ATALK 258
271 #define SOL_NETROM 259
272 #define SOL_ROSE 260
273 #define SOL_DECNET 261
274 #define SOL_X25 262
275 #define SOL_PACKET 263
276 #define SOL_ATM 264 /* ATM layer (cell level) */
277 #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
278 #define SOL_IRDA 266
279 #define SOL_NETBEUI 267
280 #define SOL_LLC 268
281 #define SOL_DCCP 269
282 #define SOL_NETLINK 270
283 #define SOL_TIPC 271
284
285 /* IPX options */
286 #define IPX_TYPE 1
287
288 #ifdef __KERNEL__
289 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
290 extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
291 int offset, int len);
292 extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
293 struct iovec *iov,
294 int offset,
295 unsigned int len, int *csump);
296
297 extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
298 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
299 extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen);
300 extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr);
301 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
302
303 #endif
304 #endif /* not kernel and not glibc */
305 #endif /* _LINUX_SOCKET_H */
306