glibc/bits/socket.h
Ulrich Drepper f4017d2057 Update.
1997-11-26 04:28  Ulrich Drepper  <drepper@cygnus.com>

	* eld/dl-profile.c (_dl_start_profile): Avoid FP calculation when
	computing s_scale.  Patch by a sun <asun@zoology.washington.edu>.

	* iconv/gconv_close.c: Correct freeing of descriptor data.
	* iconv/gconv_simple.c: Return correct error values for illegal or
	incomplete characters.

	* Makefile (iconvdata/%): Special goal to simplify iconvdata
	development.
	* iconvdata/Makefile: New file.
	* iconvdata/configure: Likewise.
	* iconvdata/extra-module.mk: Likewise.
	* iconvdata/gconv-modules: Likewise.
	* iconvdata/iso6937.c: Likewise.
	* iconvdata/iso8859-1.c: Likewise.
	* iconvdata/iso8859-10.c: Likewise.
	* iconvdata/iso8859-10.h: Likewise.
	* iconvdata/iso8859-2.c: Likewise.
	* iconvdata/iso8859-2.h: Likewise.
	* iconvdata/iso8859-3.c: Likewise.
	* iconvdata/iso8859-3.h: Likewise.
	* iconvdata/iso8859-4.c: Likewise.
	* iconvdata/iso8859-4.h: Likewise.
	* iconvdata/iso8859-5.c: Likewise.
	* iconvdata/iso8859-5.h: Likewise.
	* iconvdata/iso8859-6.c: Likewise.
	* iconvdata/iso8859-6.h: Likewise.
	* iconvdata/iso8859-7.c: Likewise.
	* iconvdata/iso8859-7.h: Likewise.
	* iconvdata/iso8859-8.c: Likewise.
	* iconvdata/iso8859-8.h: Likewise.
	* iconvdata/iso8859-9.c: Likewise.
	* iconvdata/iso8859-9.h: Likewise.
	* iconvdata/iso8859-generic.c: Likewise.
	* iconvdata/t61.c: Likewise.

	* string/Makefile (routines): Add strcasestr.
	* string/string.h: Add prototype for strcasestr.
	* sysdeps/generic/strcasestr.c: New file.
	* wcsmbs/mbrtowc.c: Simplify special case a bit.
	* wcsmbs/wcrtomb.c: Likewise.
	* wcsmbs/mbsnrtowcs.c: Correctly handle incomplete characters.
	* wcsmbs/wcsnrtombs.c: Likewise.
	* wcsmbs/mbsrtowcs.c: Make sure SRC argument is correct when
	partial character is read.
	* wcsmbs/wcsrtombs.c: Likewise.
	* wcsmbs/wmemrtombs.c: Likewise.
	* wcsmbs/wmemrtowcs.c: Likewise.

	* io/ftw.h: Include <sys/stat.h> instead of <bits/stat.h>.
	* login/pty.h: Include <sys/ioctl.h> instead og <bits/ioctl-types.h>.
	* sysdeps/i386/__longjmp.S: Define _SETJMP_H.
	* sysdeps/i386/elf/setjmp.S: Likewise.
	* sysdeps/unix/sysv/linux/kernel_termios.h: Do include
	<bits/termios.h>.

	* sysdeps/posix/mk-stdiolim.c: Output file with comment.
	* sysdeps/unix/sysv/linux/stdio_lim.h.in: Add comment.

	* sysdeps/unix/sysv/linux/sys/mman.h: Pretty print.
	* sysvipc/sys/ipc.h: Likewise.
	* sysvipc/sys/msg.h: Likewise.
	* sysvipc/sys/sem.h: Likewise.
	* sysvipc/sys/shm.h: Likewise.

	* sysdeps/alpha/bits/endian.h: Issue error message if the header is
	used directly.
	* sysdeps/alpha/bits/setjmp.h: Likewise.
	* sysdeps/alpha/fpu/bits/fenv.h: Likewise.
	* sysdeps/arm/bits/endian.h: Likewise.
	* sysdeps/arm/bits/setjmp.h: Likewise.
	* sysdeps/generic/bits/byteswap.h: Likewise.
	* sysdeps/generic/bits/confname.h: Likewise.
	* sysdeps/generic/bits/dirent.h: Likewise.
	* sysdeps/generic/bits/dlfcn.h: Likewise.
	* sysdeps/generic/bits/endian.h: Likewise.
	* sysdeps/generic/bits/fenv.h: Likewise.
	* sysdeps/generic/bits/huge_val.h: Likewise.
	* sysdeps/generic/bits/in.h: Likewise.
	* sysdeps/generic/bits/ioctl-types.h: Likewise.
	* sysdeps/generic/bits/ioctls.h: Likewise.
	* sysdeps/generic/bits/ipc.h: Likewise.
	* sysdeps/generic/bits/msq.h: Likewise.
	* sysdeps/generic/bits/poll.h: Likewise.
	* sysdeps/generic/bits/resource.h: Likewise.
	* sysdeps/generic/bits/sched.h: Likewise.
	* sysdeps/generic/bits/sem.h: Likewise.
	* sysdeps/generic/bits/setjmp.h: Likewise.
	* sysdeps/generic/bits/shm.h: Likewise.
	* sysdeps/generic/bits/sigaction.h: Likewise.
	* sysdeps/generic/bits/sigcontext.h: Likewise.
	* sysdeps/generic/bits/socket.h: Likewise.
	* sysdeps/generic/bits/stat.h: Likewise.
	* sysdeps/generic/bits/statfs.h: Likewise.
	* sysdeps/generic/bits/stdio_lim.h: Likewise.
	* sysdeps/generic/bits/termios.h: Likewise.
	* sysdeps/generic/bits/time.h: Likewise.
	* sysdeps/generic/bits/uio.h: Likewise.
	* sysdeps/generic/bits/utmp.h: Likewise.
	* sysdeps/generic/bits/utmpx.h: Likewise.
	* sysdeps/generic/bits/utsname.h: Likewise.
	* sysdeps/generic/bits/waitflags.h: Likewise.
	* sysdeps/generic/bits/waitstatus.h: Likewise.
	* sysdeps/gnu/bits/utmp.h: Likewise.
	* sysdeps/gnu/bits/utmpx.h: Likewise.
	* sysdeps/i386/bits/byteswap.h: Likewise.
	* sysdeps/i386/bits/endian.h: Likewise.
	* sysdeps/i386/bits/huge_val.h: Likewise.
	* sysdeps/i386/bits/setjmp.h: Likewise.
	* sysdeps/i386/fpu/bits/fenv.h: Likewise.
	* sysdeps/ieee754/bits/huge_val.h: Likewise.
	* sysdeps/m68k/bits/byteswap.h: Likewise.
	* sysdeps/m68k/bits/endian.h: Likewise.
	* sysdeps/m68k/bits/setjmp.h: Likewise.
	* sysdeps/m68k/fpu/bits/fenv.h: Likewise.
	* sysdeps/mach/hurd/alpha/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/bits/ioctls.h: Likewise.
	* sysdeps/mach/hurd/bits/stat.h: Likewise.
	* sysdeps/mach/hurd/hppa/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/i386/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/mips/bits/sigcontext.h: Likewise.
	* sysdeps/mips/bits/dlfcn.h: Likewise.
	* sysdeps/mips/bits/endian.h: Likewise.
	* sysdeps/mips/bits/setjmp.h: Likewise.
	* sysdeps/mips/dec/bits/endian.h: Likewise.
	* sysdeps/mips/mips64/bits/setjmp.h: Likewise.
	* sysdeps/mips/mipsel/bits/endian.h: Likewise.
	* sysdeps/mips/p40/bits/endian.h: Likewise.
	* sysdeps/powerpc/bits/endian.h: Likewise.
	* sysdeps/powerpc/bits/fenv.h: Likewise.
	* sysdeps/powerpc/bits/setjmp.h: Likewise.
	* sysdeps/sparc/sparc32/bits/endian.h: Likewise.
	* sysdeps/sparc/sparc32/bits/setjmp.h: Likewise.
	* sysdeps/sparc/sparc32/fpu/bits/fenv.h: Likewise.
	* sysdeps/sparc/sparc64/bits/endian.h: Likewise.
	* sysdeps/sparc/sparc64/fpu/bits/fenv.h: Likewise.
	* sysdeps/unix/bsd/bits/dirent.h: Likewise.
	* sysdeps/unix/bsd/bits/stat.h: Likewise.
	* sysdeps/unix/bsd/bits/waitflags.h: Likewise.
	* sysdeps/unix/bsd/bsd4.4/bits/dirent.h: Likewise.
	* sysdeps/unix/bsd/osf/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/bsd/osf/bits/sigaction.h: Likewise.
	* sysdeps/unix/bsd/sun/m68k/bits/sigcontext.h: Likewise.
	* sysdeps/unix/bsd/sun/sparc/bits/sigcontext.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/resource.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/termios.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/utsname.h: Likewise.
	* sysdeps/unix/bsd/ultrix4/bits/utsname.h: Likewise.
	* sysdeps/unix/bsd/ultrix4/mips/bits/sigcontext.h: Likewise.
	* sysdeps/unix/common/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/bits/utmp.h: Likewise.
	* sysdeps/unix/sysv/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/irix4/bits/confname.h: Likewise.
	* sysdeps/unix/sysv/irix4/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/in.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/msq.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/resource.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sched.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sem.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/shm.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sigcontext.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/statfs.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/uio.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/waitflags.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/endian.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/shm.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/statfs.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/setjmp.h: Likewise.
	* sysdeps/unix/sysv/minix/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/bits/confname.h: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/waitflags.h: Likewise.
	* sysdeps/unix/sysv/sysv4/i386/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/sparc/bits/sigcontext.h: Likewise.
	* sysdeps/vax/bits/huge_val.h: Likewise.
	* sysdeps/vax/bits/setjmp.h: Likewise.
	* sysdeps/wordsize-32/bits/elfclass.h: Likewise.
	* sysdeps/wordsize-64/bits/elfclass.h: Likewise.

1997-11-25  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* libio/stdio.h: Correct comment of sys_nerr/sys_errlist

1997-11-25  Paul Eggert  <eggert@shade.twinsun.com>

	* strftime.c (strftime):
	No longer any need to undef or declare if emacs is defined.
	(my_strftime): When checking a -1 returned by mktime, don't blow up
	if localtime_r returns NULL.

1997-11-24  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* README.template: Fix spelling.

1997-11-25  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* configure.in: Enhance --enable-add-ons description a wee bit.

1997-11-24  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* glibcbug.in: Add more information of build environment and flags.

1997-11-23  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/posix/getcwd.c: Recognize EOF from readdir and translate
	it into ENOENT.
1997-11-26 04:23:08 +00:00

199 lines
7.1 KiB
C

/* System-specific socket constants and types. Generic/4.3 BSD version.
Copyright (C) 1991, 92, 94, 95, 96, 97 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _SYS_SOCKET_H
# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
#endif
#define __need_size_t
#include <stddef.h>
/* Type for length arguments in socket calls. */
typedef unsigned int socklen_t;
/* 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
};
/* 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
/* 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. */
};
/* Bits in the FLAGS argument to `send', `recv', et al. */
enum
{
MSG_OOB = 0x01, /* Process out-of-band data. */
MSG_PEEK = 0x02, /* Peek at incoming messages. */
MSG_DONTROUTE = 0x04, /* Don't use local routing. */
MSG_EOR = 0x08, /* Data completes record. */
MSG_TRUNC = 0x10, /* Data discarded before delivery. */
MSG_CTRUNC = 0x20, /* Control data lost before delivery. */
MSG_WAITALL = 0x40, /* Wait for full request or error. */
MSG_DONTWAIT = 0x80, /* This message should be nonblocking. */
};
/* Structure describing messages sent by
`sendmsg' and received by `recvmsg'. */
struct msghdr
{
__ptr_t 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. */
__ptr_t msg_accrights; /* Access rights information. */
socklen_t msg_accrightslen; /* Length of access rights information. */
int msg_flags; /* Flags in received message. */
};
/* 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. */
SO_ACCEPTCONN = 0x0002, /* Accept connections on socket. */
SO_REUSEADDR = 0x0004, /* Allow reuse of local addresses. */
SO_KEEPALIVE = 0x0008, /* Keep connections alive and send
SIGPIPE when they die. */
SO_DONTROUTE = 0x0010, /* Don't do local routing. */
SO_BROADCAST = 0x0020, /* Allow transmission of
broadcast messages. */
SO_USELOOPBACK = 0x0040, /* Use the software loopback to avoid
hardware use when possible. */
SO_LINGER = 0x0080, /* Block on close of a reliable
socket to transmit pending data. */
SO_OOBINLINE = 0x0100, /* Receive out-of-band data in-band. */
SO_REUSEPORT = 0x0200, /* Allow local address and port reuse. */
SO_SNDBUF = 0x1001, /* Send buffer size. */
SO_RCVBUF = 0x1002, /* Receive buffer. */
SO_SNDLOWAT = 0x1003, /* Send low-water mark. */
SO_RCVLOWAT = 0x1004, /* Receive low-water mark. */
SO_SNDTIMEO = 0x1005, /* Send timeout. */
SO_RCVTIMEO = 0x1006, /* Receive timeout. */
SO_ERROR = 0x1007, /* Get and clear error status. */
SO_STYLE = 0x1008, /* Get socket connection style. */
SO_TYPE = SO_STYLE, /* Compatible name for SO_STYLE. */
};
/* Structure used to manipulate the SO_LINGER option. */
struct linger
{
int l_onoff; /* Nonzero to linger on close. */
int l_linger; /* Time to linger. */
};