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