File: socket.h

package info (click to toggle)
glibc 2.23-4
  • links: PTS, VCS
  • area: main
  • in suites: jessie-backports
  • size: 233,552 kB
  • sloc: ansic: 987,702; asm: 260,118; sh: 10,380; makefile: 9,474; python: 3,957; cpp: 3,956; perl: 2,207; awk: 1,907; pascal: 1,527; yacc: 291; sed: 80
file content (358 lines) | stat: -rw-r--r-- 12,733 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
/* System-specific socket constants and types.  4.4 BSD version.
   Copyright (C) 1991-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If
   not, see <http://www.gnu.org/licenses/>.  */

#ifndef __BITS_SOCKET_H
#define __BITS_SOCKET_H	1

#ifndef _SYS_SOCKET_H
# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
#endif

#define	__need_size_t
#define __need_NULL
#include <stddef.h>

#include <limits.h>		/* XXX Is this allowed?  */
#include <bits/types.h>

/* Type for length arguments in socket calls.  */
#ifndef __socklen_t_defined
typedef __socklen_t socklen_t;
# define __socklen_t_defined
#endif


/* Types of sockets.  */
enum __socket_type
{
  SOCK_STREAM = 1,		/* Sequenced, reliable, connection-based
				   byte streams.  */
#define SOCK_STREAM SOCK_STREAM
  SOCK_DGRAM = 2,		/* Connectionless, unreliable datagrams
				   of fixed maximum length.  */
#define SOCK_DGRAM SOCK_DGRAM
  SOCK_RAW = 3,			/* Raw protocol interface.  */
#define SOCK_RAW SOCK_RAW
  SOCK_RDM = 4,			/* Reliably-delivered messages.  */
#define SOCK_RDM SOCK_RDM
  SOCK_SEQPACKET = 5,		/* Sequenced, reliable, connection-based,
				   datagrams of fixed maximum length.  */
#define SOCK_SEQPACKET SOCK_SEQPACKET

#define SOCK_MAX (SOCK_SEQPACKET + 1)
  /* Mask which covers at least up to SOCK_MASK-1.
     The remaining bits are used as flags. */
#define SOCK_TYPE_MASK 0xf

  /* Flags to be ORed into the type parameter of socket and socketpair and
     used for the flags parameter of accept4.  */

  SOCK_CLOEXEC = 0x10000000,	/* Atomically set close-on-exec flag for the
				   new descriptor(s).  */
#define SOCK_CLOEXEC SOCK_CLOEXEC

  SOCK_NONBLOCK = 0x20000000	/* Atomically mark descriptor(s) as
				   non-blocking.  */
#define SOCK_NONBLOCK SOCK_NONBLOCK
};

/* Protocol families.  */
#define	PF_UNSPEC	0	/* Unspecified.  */
#define	PF_LOCAL	1	/* Local to host (pipes and file-domain).  */
#define	PF_UNIX		PF_LOCAL /* Old BSD name for PF_LOCAL.  */
#define	PF_FILE		PF_LOCAL /* POSIX name for PF_LOCAL.  */
#define	PF_INET		2	/* IP protocol family.  */
#define	PF_IMPLINK	3	/* ARPAnet IMP protocol.  */
#define	PF_PUP		4	/* PUP protocols.  */
#define	PF_CHAOS	5	/* MIT Chaos protocols.  */
#define	PF_NS		6	/* Xerox NS protocols.  */
#define	PF_ISO		7	/* ISO protocols.  */
#define	PF_OSI		PF_ISO
#define	PF_ECMA		8	/* ECMA protocols.  */
#define	PF_DATAKIT	9	/* AT&T Datakit protocols.  */
#define	PF_CCITT	10	/* CCITT protocols (X.25 et al).  */
#define	PF_SNA		11	/* IBM SNA protocol.  */
#define	PF_DECnet	12	/* DECnet protocols.  */
#define	PF_DLI		13	/* Direct data link interface.  */
#define	PF_LAT		14	/* DEC Local Area Transport protocol.  */
#define	PF_HYLINK	15	/* NSC Hyperchannel protocol.  */
#define	PF_APPLETALK	16	/* Don't use this.  */
#define	PF_ROUTE	17	/* Internal Routing Protocol.  */
#define	PF_LINK		18	/* Link layer interface.  */
#define	PF_XTP		19	/* eXpress Transfer Protocol (no AF).  */
#define	PF_COIP		20	/* Connection-oriented IP, aka ST II.  */
#define	PF_CNT		21	/* Computer Network Technology.  */
#define PF_RTIP		22	/* Help Identify RTIP packets.  **/
#define	PF_IPX		23	/* Novell Internet Protocol.  */
#define	PF_SIP		24	/* Simple Internet Protocol.  */
#define PF_PIP		25	/* Help Identify PIP packets.  */
#define PF_INET6	26	/* IP version 6.  */
#define	PF_MAX		27

/* Address families.  */
#define	AF_UNSPEC	PF_UNSPEC
#define	AF_LOCAL	PF_LOCAL
#define	AF_UNIX		PF_UNIX
#define	AF_FILE		PF_FILE
#define	AF_INET		PF_INET
#define	AF_IMPLINK	PF_IMPLINK
#define	AF_PUP		PF_PUP
#define	AF_CHAOS	PF_CHAOS
#define	AF_NS		PF_NS
#define	AF_ISO		PF_ISO
#define	AF_OSI		PF_OSI
#define	AF_ECMA		PF_ECMA
#define	AF_DATAKIT	PF_DATAKIT
#define	AF_CCITT	PF_CCITT
#define	AF_SNA		PF_SNA
#define	AF_DECnet	PF_DECnet
#define	AF_DLI		PF_DLI
#define	AF_LAT		PF_LAT
#define	AF_HYLINK	PF_HYLINK
#define	AF_APPLETALK	PF_APPLETALK
#define	AF_ROUTE	PF_ROUTE
#define	AF_LINK		PF_LINK
#define	pseudo_AF_XTP	PF_XTP
#define	AF_COIP		PF_COIP
#define	AF_CNT		PF_CNT
#define pseudo_AF_RTIP	PF_RTIP
#define	AF_IPX		PF_IPX
#define	AF_SIP		PF_SIP
#define pseudo_AF_PIP	PF_PIP
#define AF_INET6	PF_INET6
#define	AF_MAX		PF_MAX

/* Maximum queue length specifiable by listen.  */
#define SOMAXCONN	128	/* 5 on the origional 4.4 BSD.  */

/* Get the definition of the macro to define the common sockaddr members.  */
#include <bits/sockaddr.h>

/* Structure describing a generic socket address.  */
struct sockaddr
  {
    __SOCKADDR_COMMON (sa_);	/* Common data: address family and length.  */
    char sa_data[14];		/* Address data.  */
  };


/* Structure large enough to hold any socket address (with the historical
   exception of AF_UNIX).  */
#if ULONG_MAX > 0xffffffff
# define __ss_aligntype	__uint64_t
#else
# define __ss_aligntype	__uint32_t
#endif
#define _SS_PADSIZE \
  (_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype))

struct sockaddr_storage
  {
    __SOCKADDR_COMMON (ss_);	/* Address family, etc.  */
    char __ss_padding[_SS_PADSIZE];
    __ss_aligntype __ss_align;	/* Force desired alignment.  */
  };


/* Bits in the FLAGS argument to `send', `recv', et al.  */
enum
  {
    MSG_OOB		= 0x01,	/* Process out-of-band data.  */
#define MSG_OOB MSG_OOB
    MSG_PEEK		= 0x02,	/* Peek at incoming messages.  */
#define MSG_PEEK MSG_PEEK
    MSG_DONTROUTE	= 0x04,	/* Don't use local routing.  */
#define MSG_DONTROUTE MSG_DONTROUTE
    MSG_EOR		= 0x08,	/* Data completes record.  */
#define MSG_EOR MSG_EOR
    MSG_TRUNC		= 0x10,	/* Data discarded before delivery.  */
#define MSG_TRUNC MSG_TRUNC
    MSG_CTRUNC		= 0x20,	/* Control data lost before delivery.  */
#define MSG_CTRUNC MSG_CTRUNC
    MSG_WAITALL		= 0x40,	/* Wait for full request or error.  */
#define MSG_WAITALL MSG_WAITALL
    MSG_DONTWAIT	= 0x80,	/* This message should be nonblocking.  */
#define MSG_DONTWAIT MSG_DONTWAIT
    MSG_NOSIGNAL	= 0x0400	/* Do not generate SIGPIPE on EPIPE.  */
#define MSG_NOSIGNAL MSG_NOSIGNAL
  };


/* Structure describing messages sent by
   `sendmsg' and received by `recvmsg'.  */
struct msghdr
  {
    void *msg_name;		/* Address to send to/receive from.  */
    socklen_t msg_namelen;	/* Length of address data.  */

    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
    int msg_iovlen;		/* Number of elements in the vector.  */

    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
    socklen_t msg_controllen;	/* Ancillary data buffer length.  */

    int msg_flags;		/* Flags in received message.  */
  };

/* Structure used for storage of ancillary data object information.  */
struct cmsghdr
  {
    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
				   of cmsghdr structure.  */
    int cmsg_level;		/* Originating protocol.  */
    int cmsg_type;		/* Protocol specific type.  */
#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
#endif
  };

/* Ancillary data object manipulation macros.  */
#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
#else
# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
#endif

#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)

#define CMSG_FIRSTHDR(mhdr) \
  ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)		      \
   ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL)

#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
			   & (size_t) ~(sizeof (size_t) - 1))
#define CMSG_SPACE(len) (CMSG_ALIGN (len) \
			 + CMSG_ALIGN (sizeof (struct cmsghdr)))
#define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))

extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr,
				      struct cmsghdr *__cmsg) __THROW;
#ifdef __USE_EXTERN_INLINES
# ifndef _EXTERN_INLINE
#  define _EXTERN_INLINE __extern_inline
# endif
_EXTERN_INLINE struct cmsghdr *
__NTH (__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg))
{
  if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
    /* The kernel header does this so there may be a reason.  */
    return NULL;

  __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
			       + CMSG_ALIGN (__cmsg->cmsg_len));
  if ((unsigned char *) (__cmsg + 1) > ((unsigned char *) __mhdr->msg_control
					+ __mhdr->msg_controllen)
      || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
	  > ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
    /* No more entries.  */
    return NULL;
  return __cmsg;
}
#endif	/* Use `extern inline'.  */

/* Socket level message types.  */
enum
  {
    SCM_RIGHTS = 0x01,		/* Access rights (array of int).  */
#define SCM_RIGHTS SCM_RIGHTS
    SCM_TIMESTAMP = 0x02,	/* Timestamp (struct timeval).  */
#define SCM_TIMESTAMP SCM_TIMESTAMP
    SCM_CREDS = 0x03		/* Process creds (struct cmsgcred).  */
#define SCM_CREDS SCM_CREDS
  };

/* Unfortunately, BSD practice dictates this structure be of fixed size.
   If there are more than CMGROUP_MAX groups, the list is truncated.
   (On GNU systems, the `cmcred_euid' field is just the first in the
   list of effective UIDs.)  */
#define CMGROUP_MAX	16

/* Structure delivered by SCM_CREDS.  This describes the identity of the
   sender of the data simultaneously received on the socket.  By BSD
   convention, this is included only when a sender on a AF_LOCAL socket
   sends cmsg data of this type and size; the sender's structure is
   ignored, and the system fills in the various IDs of the sender process.  */
struct cmsgcred
  {
    __pid_t cmcred_pid;
    __uid_t cmcred_uid;
    __uid_t cmcred_euid;
    __gid_t cmcred_gid;
    int cmcred_ngroups;
    __gid_t cmcred_groups[CMGROUP_MAX];
  };

/* Protocol number used to manipulate socket-level options
   with `getsockopt' and `setsockopt'.  */
#define	SOL_SOCKET	0xffff

/* Socket-level options for `getsockopt' and `setsockopt'.  */
enum
  {
    SO_DEBUG = 0x0001,		/* Record debugging information.  */
#define SO_DEBUG SO_DEBUG
    SO_ACCEPTCONN = 0x0002,	/* Accept connections on socket.  */
#define SO_ACCEPTCONN SO_ACCEPTCONN
    SO_REUSEADDR = 0x0004,	/* Allow reuse of local addresses.  */
#define SO_REUSEADDR SO_REUSEADDR
    SO_KEEPALIVE = 0x0008,	/* Keep connections alive and send
				   SIGPIPE when they die.  */
#define SO_KEEPALIVE SO_KEEPALIVE
    SO_DONTROUTE = 0x0010,	/* Don't do local routing.  */
#define SO_DONTROUTE SO_DONTROUTE
    SO_BROADCAST = 0x0020,	/* Allow transmission of
				   broadcast messages.  */
#define SO_BROADCAST SO_BROADCAST
    SO_USELOOPBACK = 0x0040,	/* Use the software loopback to avoid
				   hardware use when possible.  */
#define SO_USELOOPBACK SO_USELOOPBACK
    SO_LINGER = 0x0080,		/* Block on close of a reliable
				   socket to transmit pending data.  */
#define SO_LINGER SO_LINGER
    SO_OOBINLINE = 0x0100,	/* Receive out-of-band data in-band.  */
#define SO_OOBINLINE SO_OOBINLINE
    SO_REUSEPORT = 0x0200,	/* Allow local address and port reuse.  */
#define SO_REUSEPORT SO_REUSEPORT
    SO_SNDBUF = 0x1001,		/* Send buffer size.  */
#define SO_SNDBUF SO_SNDBUF
    SO_RCVBUF = 0x1002,		/* Receive buffer.  */
#define SO_RCVBUF SO_RCVBUF
    SO_SNDLOWAT = 0x1003,	/* Send low-water mark.  */
#define SO_SNDLOWAT SO_SNDLOWAT
    SO_RCVLOWAT = 0x1004,	/* Receive low-water mark.  */
#define SO_RCVLOWAT SO_RCVLOWAT
    SO_SNDTIMEO = 0x1005,	/* Send timeout.  */
#define SO_SNDTIMEO SO_SNDTIMEO
    SO_RCVTIMEO = 0x1006,	/* Receive timeout.  */
#define SO_RCVTIMEO SO_RCVTIMEO
    SO_ERROR = 0x1007,		/* Get and clear error status.  */
#define SO_ERROR SO_ERROR
    SO_STYLE = 0x1008,		/* Get socket connection style.  */
#define SO_STYLE SO_STYLE
    SO_TYPE = SO_STYLE		/* Compatible name for SO_STYLE.  */
#define SO_TYPE SO_TYPE
  };

/* Structure used to manipulate the SO_LINGER option.  */
struct linger
  {
    int l_onoff;		/* Nonzero to linger on close.  */
    int l_linger;		/* Time to linger.  */
  };

#endif	/* bits/socket.h */