[thirdparty/glibc.git] / sysdeps / mach / hurd / bits / socket.h

/* System-specific socket constants and types.  Hurd version.
   Copyright (C) 1991-2015 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 = 0x00400000,	/* Atomically set close-on-exec flag for the
				   new descriptor(s).  */
#define SOCK_CLOEXEC SOCK_CLOEXEC

  /* Changed from the O_NONBLOCK value (0x8, which is unusable for us as it is
     conflicting with the original SOCK_* flags' values) to the Linux value
     (04000).  TODO: is there a ``better'' value?  */
  SOCK_NONBLOCK = 0x0800	/* 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).  We reserve 128 bytes.  */
#if ULONG_MAX > 0xffffffff
# define __ss_aligntype	__uint64_t
#else
# define __ss_aligntype	__uint32_t
#endif
#define _SS_SIZE	128
#define _SS_PADSIZE	(_SS_SIZE - (2 * sizeof (__ss_aligntype)))

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


/* 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 */
Commit	Line	Data
6960eb42	1	/* System-specific socket constants and types. Hurd version.
b168057a	2	Copyright (C) 1991-2015 Free Software Foundation, Inc.
6960eb42 TS	3
	4	This file is part of the GNU C Library.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Lesser General Public License as
	8	published by the Free Software Foundation; either version 2.1 of the
	9	License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
	17	License along with the GNU C Library; see the file COPYING.LIB. If
	18	not, see <http://www.gnu.org/licenses/>. */
	19
	20	#ifndef __BITS_SOCKET_H
	21	#define __BITS_SOCKET_H 1
	22
	23	#ifndef _SYS_SOCKET_H
	24	# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
	25	#endif
	26
	27	#define __need_size_t
	28	#define __need_NULL
	29	#include <stddef.h>
	30
	31	#include <limits.h> /* XXX Is this allowed? */
	32	#include <bits/types.h>
	33
	34	/* Type for length arguments in socket calls. */
	35	#ifndef __socklen_t_defined
	36	typedef __socklen_t socklen_t;
	37	# define __socklen_t_defined
	38	#endif
	39
	40
	41	/* Types of sockets. */
	42	enum __socket_type
	43	{
	44	SOCK_STREAM = 1, /* Sequenced, reliable, connection-based
	45	byte streams. */
	46	#define SOCK_STREAM SOCK_STREAM
	47	SOCK_DGRAM = 2, /* Connectionless, unreliable datagrams
	48	of fixed maximum length. */
	49	#define SOCK_DGRAM SOCK_DGRAM
	50	SOCK_RAW = 3, /* Raw protocol interface. */
	51	#define SOCK_RAW SOCK_RAW
	52	SOCK_RDM = 4, /* Reliably-delivered messages. */
	53	#define SOCK_RDM SOCK_RDM
	54	SOCK_SEQPACKET = 5, /* Sequenced, reliable, connection-based,
	55	datagrams of fixed maximum length. */
	56	#define SOCK_SEQPACKET SOCK_SEQPACKET
	57
	58	#define SOCK_MAX (SOCK_SEQPACKET + 1)
	59	/* Mask which covers at least up to SOCK_MASK-1. The
	60	remaining bits are used as flags. */
	61	#define SOCK_TYPE_MASK 0xf
	62
	63	/* Flags to be ORed into the type parameter of socket and socketpair and
	64	used for the flags parameter of accept4. */
	65
	66	SOCK_CLOEXEC = 0x00400000, /* Atomically set close-on-exec flag for the
67	new descriptor(s). */
68	#define SOCK_CLOEXEC SOCK_CLOEXEC
69
70	/* Changed from the O_NONBLOCK value (0x8, which is unusable for us as it is
71	conflicting with the original SOCK_* flags' values) to the Linux value
72	(04000). TODO: is there a ``better'' value? */
73	SOCK_NONBLOCK = 0x0800 /* Atomically mark descriptor(s) as
74	non-blocking. */
75	#define SOCK_NONBLOCK SOCK_NONBLOCK
76	};
77
78	/* Protocol families. */
79	#define PF_UNSPEC 0 /* Unspecified. */
80	#define PF_LOCAL 1 /* Local to host (pipes and file-domain). */
81	#define PF_UNIX PF_LOCAL /* Old BSD name for PF_LOCAL. */
82	#define PF_FILE PF_LOCAL /* POSIX name for PF_LOCAL. */
83	#define PF_INET 2 /* IP protocol family. */
84	#define PF_IMPLINK 3 /* ARPAnet IMP protocol. */
85	#define PF_PUP 4 /* PUP protocols. */
86	#define PF_CHAOS 5 /* MIT Chaos protocols. */
87	#define PF_NS 6 /* Xerox NS protocols. */
88	#define PF_ISO 7 /* ISO protocols. */
89	#define PF_OSI PF_ISO
90	#define PF_ECMA 8 /* ECMA protocols. */
91	#define PF_DATAKIT 9 /* AT&T Datakit protocols. */
92	#define PF_CCITT 10 /* CCITT protocols (X.25 et al). */
93	#define PF_SNA 11 /* IBM SNA protocol. */
94	#define PF_DECnet 12 /* DECnet protocols. */
95	#define PF_DLI 13 /* Direct data link interface. */
96	#define PF_LAT 14 /* DEC Local Area Transport protocol. */
97	#define PF_HYLINK 15 /* NSC Hyperchannel protocol. */
98	#define PF_APPLETALK 16 /* Don't use this. */
99	#define PF_ROUTE 17 /* Internal Routing Protocol. */
100	#define PF_LINK 18 /* Link layer interface. */
101	#define PF_XTP 19 /* eXpress Transfer Protocol (no AF). */
102	#define PF_COIP 20 /* Connection-oriented IP, aka ST II. */
103	#define PF_CNT 21 /* Computer Network Technology. */
104	#define PF_RTIP 22 /* Help Identify RTIP packets. **/
105	#define PF_IPX 23 /* Novell Internet Protocol. */
106	#define PF_SIP 24 /* Simple Internet Protocol. */
107	#define PF_PIP 25 /* Help Identify PIP packets. */
108	#define PF_INET6 26 /* IP version 6. */
109	#define PF_MAX 27
110
111	/* Address families. */
112	#define AF_UNSPEC PF_UNSPEC
113	#define AF_LOCAL PF_LOCAL
114	#define AF_UNIX PF_UNIX
115	#define AF_FILE PF_FILE
116	#define AF_INET PF_INET
117	#define AF_IMPLINK PF_IMPLINK
118	#define AF_PUP PF_PUP
119	#define AF_CHAOS PF_CHAOS
120	#define AF_NS PF_NS
121	#define AF_ISO PF_ISO
122	#define AF_OSI PF_OSI
123	#define AF_ECMA PF_ECMA
124	#define AF_DATAKIT PF_DATAKIT
125	#define AF_CCITT PF_CCITT
126	#define AF_SNA PF_SNA
127	#define AF_DECnet PF_DECnet
128	#define AF_DLI PF_DLI
129	#define AF_LAT PF_LAT
130	#define AF_HYLINK PF_HYLINK
131	#define AF_APPLETALK PF_APPLETALK
132	#define AF_ROUTE PF_ROUTE
133	#define AF_LINK PF_LINK
134	#define pseudo_AF_XTP PF_XTP
135	#define AF_COIP PF_COIP
136	#define AF_CNT PF_CNT
137	#define pseudo_AF_RTIP PF_RTIP
138	#define AF_IPX PF_IPX
139	#define AF_SIP PF_SIP
140	#define pseudo_AF_PIP PF_PIP
141	#define AF_INET6 PF_INET6
142	#define AF_MAX PF_MAX
143
144	/* Maximum queue length specifiable by listen. */
145	#define SOMAXCONN 128 /* 5 on the origional 4.4 BSD. */
146
147	/* Get the definition of the macro to define the common sockaddr members. */
148	#include <bits/sockaddr.h>
149
150	/* Structure describing a generic socket address. */
151	struct sockaddr
152	{
153	__SOCKADDR_COMMON (sa_); /* Common data: address family and length. */
154	char sa_data[14]; /* Address data. */
155	};
156
157
158	/* Structure large enough to hold any socket address (with the historical
159	exception of AF_UNIX). We reserve 128 bytes. */
160	#if ULONG_MAX > 0xffffffff
161	# define __ss_aligntype __uint64_t
162	#else
163	# define __ss_aligntype __uint32_t
164	#endif
165	#define _SS_SIZE 128
166	#define _SS_PADSIZE (_SS_SIZE - (2 * sizeof (__ss_aligntype)))
167
168	struct sockaddr_storage
169	{
170	__SOCKADDR_COMMON (ss_); /* Address family, etc. */
171	__ss_aligntype __ss_align; /* Force desired alignment. */
172	char __ss_padding[_SS_PADSIZE];
173	};
174
175
176	/* Bits in the FLAGS argument to `send', `recv', et al. */
177	enum
178	{
179	MSG_OOB = 0x01, /* Process out-of-band data. */
180	#define MSG_OOB MSG_OOB
181	MSG_PEEK = 0x02, /* Peek at incoming messages. */
182	#define MSG_PEEK MSG_PEEK
183	MSG_DONTROUTE = 0x04, /* Don't use local routing. */
184	#define MSG_DONTROUTE MSG_DONTROUTE
185	MSG_EOR = 0x08, /* Data completes record. */
186	#define MSG_EOR MSG_EOR
187	MSG_TRUNC = 0x10, /* Data discarded before delivery. */
188	#define MSG_TRUNC MSG_TRUNC
189	MSG_CTRUNC = 0x20, /* Control data lost before delivery. */
190	#define MSG_CTRUNC MSG_CTRUNC
191	MSG_WAITALL = 0x40, /* Wait for full request or error. */
192	#define MSG_WAITALL MSG_WAITALL
193	MSG_DONTWAIT = 0x80, /* This message should be nonblocking. */
194	#define MSG_DONTWAIT MSG_DONTWAIT
195	MSG_NOSIGNAL = 0x0400 /* Do not generate SIGPIPE on EPIPE. */
196	#define MSG_NOSIGNAL MSG_NOSIGNAL
197	};
198
199
200	/* Structure describing messages sent by
201	`sendmsg' and received by `recvmsg'. */
202	struct msghdr
203	{
204	void msg_name; / Address to send to/receive from. */
205	socklen_t msg_namelen; /* Length of address data. */
206
207	struct iovec msg_iov; / Vector of data to send/receive into. */
208	int msg_iovlen; /* Number of elements in the vector. */
209
210	void msg_control; / Ancillary data (eg BSD filedesc passing). */
211	socklen_t msg_controllen; /* Ancillary data buffer length. */
212
213	int msg_flags; /* Flags in received message. */
214	};
215
216	/* Structure used for storage of ancillary data object information. */
217	struct cmsghdr
218	{
219	socklen_t cmsg_len; /* Length of data in cmsg_data plus length
220	of cmsghdr structure. */
221	int cmsg_level; /* Originating protocol. */
222	int cmsg_type; /* Protocol specific type. */
223	#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) \|\| __STDC_VERSION__ >= 199901L
224	__extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data. */
225	#endif
226	};
227
228	/* Ancillary data object manipulation macros. */
229	#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) \|\| __STDC_VERSION__ >= 199901L
230	# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
231	#else
232	# define CMSG_DATA(cmsg) ((unsigned char ) ((struct cmsghdr ) (cmsg) + 1))
233	#endif
234
235	#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
236
237	#define CMSG_FIRSTHDR(mhdr) \
238	((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr) \
239	? (struct cmsghdr ) (mhdr)->msg_control : (struct cmsghdr ) NULL)
240
241	#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
242	& (size_t) ~(sizeof (size_t) - 1))
243	#define CMSG_SPACE(len) (CMSG_ALIGN (len) \
244	+ CMSG_ALIGN (sizeof (struct cmsghdr)))
245	#define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
246
247	extern struct cmsghdr __cmsg_nxthdr (struct msghdr __mhdr,
248	struct cmsghdr *__cmsg) __THROW;
249	#ifdef __USE_EXTERN_INLINES
250	# ifndef _EXTERN_INLINE
251	# define _EXTERN_INLINE __extern_inline
252	# endif
253	_EXTERN_INLINE struct cmsghdr *
254	__NTH (__cmsg_nxthdr (struct msghdr __mhdr, struct cmsghdr __cmsg))
255	{
256	if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
257	/* The kernel header does this so there may be a reason. */
258	return NULL;
259
260	__cmsg = (struct cmsghdr ) ((unsigned char ) __cmsg
261	+ CMSG_ALIGN (__cmsg->cmsg_len));
262	if ((unsigned char ) (__cmsg + 1) > ((unsigned char ) __mhdr->msg_control
263	+ __mhdr->msg_controllen)
264	\|\| ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
265	> ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
266	/* No more entries. */
267	return NULL;
268	return __cmsg;
269	}
270	#endif /* Use `extern inline'. */
271
272	/* Socket level message types. */
273	enum
274	{
275	SCM_RIGHTS = 0x01, /* Access rights (array of int). */
276	#define SCM_RIGHTS SCM_RIGHTS
277	SCM_TIMESTAMP = 0x02, /* Timestamp (struct timeval). */
278	#define SCM_TIMESTAMP SCM_TIMESTAMP
279	SCM_CREDS = 0x03 /* Process creds (struct cmsgcred). */
280	#define SCM_CREDS SCM_CREDS
281	};
282
283	/* Unfortunately, BSD practice dictates this structure be of fixed size.
284	If there are more than CMGROUP_MAX groups, the list is truncated.
285	(On GNU systems, the `cmcred_euid' field is just the first in the
286	list of effective UIDs.) */
287	#define CMGROUP_MAX 16
288
289	/* Structure delivered by SCM_CREDS. This describes the identity of the
290	sender of the data simultaneously received on the socket. By BSD
291	convention, this is included only when a sender on a AF_LOCAL socket
292	sends cmsg data of this type and size; the sender's structure is
293	ignored, and the system fills in the various IDs of the sender process. */
294	struct cmsgcred
295	{
296	__pid_t cmcred_pid;
297	__uid_t cmcred_uid;
298	__uid_t cmcred_euid;
299	__gid_t cmcred_gid;
300	int cmcred_ngroups;
301	__gid_t cmcred_groups[CMGROUP_MAX];
302	};
303
304	/* Protocol number used to manipulate socket-level options
305	with `getsockopt' and `setsockopt'. */
306	#define SOL_SOCKET 0xffff
307
308	/* Socket-level options for `getsockopt' and `setsockopt'. */
309	enum
310	{
311	SO_DEBUG = 0x0001, /* Record debugging information. */
312	#define SO_DEBUG SO_DEBUG
313	SO_ACCEPTCONN = 0x0002, /* Accept connections on socket. */
314	#define SO_ACCEPTCONN SO_ACCEPTCONN
315	SO_REUSEADDR = 0x0004, /* Allow reuse of local addresses. */
316	#define SO_REUSEADDR SO_REUSEADDR
317	SO_KEEPALIVE = 0x0008, /* Keep connections alive and send
318	SIGPIPE when they die. */
319	#define SO_KEEPALIVE SO_KEEPALIVE
320	SO_DONTROUTE = 0x0010, /* Don't do local routing. */
321	#define SO_DONTROUTE SO_DONTROUTE
322	SO_BROADCAST = 0x0020, /* Allow transmission of
323	broadcast messages. */
324	#define SO_BROADCAST SO_BROADCAST
325	SO_USELOOPBACK = 0x0040, /* Use the software loopback to avoid
326	hardware use when possible. */
327	#define SO_USELOOPBACK SO_USELOOPBACK
328	SO_LINGER = 0x0080, /* Block on close of a reliable
329	socket to transmit pending data. */
330	#define SO_LINGER SO_LINGER
331	SO_OOBINLINE = 0x0100, /* Receive out-of-band data in-band. */
332	#define SO_OOBINLINE SO_OOBINLINE
333	SO_REUSEPORT = 0x0200, /* Allow local address and port reuse. */
334	#define SO_REUSEPORT SO_REUSEPORT
335	SO_SNDBUF = 0x1001, /* Send buffer size. */
336	#define SO_SNDBUF SO_SNDBUF
337	SO_RCVBUF = 0x1002, /* Receive buffer. */
338	#define SO_RCVBUF SO_RCVBUF
339	SO_SNDLOWAT = 0x1003, /* Send low-water mark. */
340	#define SO_SNDLOWAT SO_SNDLOWAT
341	SO_RCVLOWAT = 0x1004, /* Receive low-water mark. */
342	#define SO_RCVLOWAT SO_RCVLOWAT
343	SO_SNDTIMEO = 0x1005, /* Send timeout. */
344	#define SO_SNDTIMEO SO_SNDTIMEO
345	SO_RCVTIMEO = 0x1006, /* Receive timeout. */
346	#define SO_RCVTIMEO SO_RCVTIMEO
347	SO_ERROR = 0x1007, /* Get and clear error status. */
348	#define SO_ERROR SO_ERROR
349	SO_STYLE = 0x1008, /* Get socket connection style. */
350	#define SO_STYLE SO_STYLE
351	SO_TYPE = SO_STYLE /* Compatible name for SO_STYLE. */
352	#define SO_TYPE SO_TYPE
353	};
354
355	/* Structure used to manipulate the SO_LINGER option. */
356	struct linger
357	{
358	int l_onoff; /* Nonzero to linger on close. */
359	int l_linger; /* Time to linger. */
360	};
361
362	#endif /* bits/socket.h */