FM / bits

/usr/include/bits

Name	Size	Mode	Actions
platform/	-	0755	rm
types/	-	0755	rm
a.out.h	268	0644	edit dl rm
argp-ldbl.h	1010	0644	edit dl rm
atomic_wide_counter.h	1283	0644	edit dl rm
byteswap.h	2450	0644	edit dl rm
cmathcalls.h	4139	0644	edit dl rm
confname.h	23828	0644	edit dl rm
cpu-set.h	4516	0644	edit dl rm
dirent.h	1771	0644	edit dl rm
dirent_ext.h	1275	0644	edit dl rm
dlfcn.h	2521	0644	edit dl rm
dl_find_object.h	1114	0644	edit dl rm
elfclass.h	426	0644	edit dl rm
endian.h	1905	0644	edit dl rm
endianness.h	273	0644	edit dl rm
environments.h	3791	0644	edit dl rm
epoll.h	1071	0644	edit dl rm
err-ldbl.h	1148	0644	edit dl rm
errno.h	1426	0644	edit dl rm
error-ldbl.h	1012	0644	edit dl rm
error.h	2684	0644	edit dl rm
eventfd.h	1129	0644	edit dl rm
fcntl-linux.h	14050	0644	edit dl rm
fcntl.h	2246	0644	edit dl rm
fcntl2.h	5575	0644	edit dl rm
fenv.h	3370	0644	edit dl rm
floatn-common.h	10325	0644	edit dl rm
floatn.h	4457	0644	edit dl rm
flt-eval-method.h	1215	0644	edit dl rm
fp-fast.h	1216	0644	edit dl rm
fp-logb.h	1012	0644	edit dl rm
getopt_core.h	3667	0644	edit dl rm
getopt_ext.h	3038	0644	edit dl rm
getopt_posix.h	1810	0644	edit dl rm
hwcap.h	972	0644	edit dl rm
in.h	9596	0644	edit dl rm
indirect-return.h	1591	0644	edit dl rm
inet-fortified-decl.h	1842	0644	edit dl rm
inet-fortified.h	1793	0644	edit dl rm
initspin.h	25	0644	edit dl rm
inotify.h	1080	0644	edit dl rm
ioctl-types.h	2456	0644	edit dl rm
ioctls.h	4478	0644	edit dl rm
ipc-perm.h	1745	0644	edit dl rm
ipc.h	1523	0644	edit dl rm
ipctypes.h	1176	0644	edit dl rm
iscanonical.h	2479	0644	edit dl rm
libc-header-start.h	4286	0644	edit dl rm
libm-simd-decl-stubs.h	3004	0644	edit dl rm
link.h	4286	0644	edit dl rm
link_lavcurrent.h	1099	0644	edit dl rm
locale.h	1368	0644	edit dl rm
local_lim.h	3176	0644	edit dl rm
long-double.h	970	0644	edit dl rm
math-vector.h	2308	0644	edit dl rm
mathcalls-helper-functions.h	1863	0644	edit dl rm
mathcalls-narrow.h	1312	0644	edit dl rm
mathcalls.h	13385	0644	edit dl rm
mathdef.h	891	0644	edit dl rm
mman-linux.h	5086	0644	edit dl rm
mman-map-flags-generic.h	1997	0644	edit dl rm
mman-shared.h	2841	0644	edit dl rm
mman.h	1363	0644	edit dl rm
monetary-ldbl.h	1047	0644	edit dl rm
mqueue.h	1246	0644	edit dl rm
mqueue2.h	2151	0644	edit dl rm
msq.h	1793	0644	edit dl rm
netdb.h	1264	0644	edit dl rm
param.h	1433	0644	edit dl rm
poll.h	2076	0644	edit dl rm
poll2.h	2666	0644	edit dl rm
posix1_lim.h	5198	0644	edit dl rm
posix2_lim.h	2867	0644	edit dl rm
posix_opt.h	5913	0644	edit dl rm
printf-ldbl.h	992	0644	edit dl rm
procfs-extra.h	963	0644	edit dl rm
procfs-id.h	1148	0644	edit dl rm
procfs-prregset.h	1050	0644	edit dl rm
procfs.h	2025	0644	edit dl rm
pthreadtypes-arch.h	1838	0644	edit dl rm
pthreadtypes.h	3072	0644	edit dl rm
pthread_stack_min-dynamic.h	1209	0644	edit dl rm
pthread_stack_min.h	946	0644	edit dl rm
ptrace-shared.h	4091	0644	edit dl rm
resource.h	6308	0644	edit dl rm
rseq.h	1243	0644	edit dl rm
sched.h	5673	0644	edit dl rm
select.h	1505	0644	edit dl rm
select2.h	1438	0644	edit dl rm
sem.h	2259	0644	edit dl rm
semaphore.h	1215	0644	edit dl rm
setjmp.h	1287	0644	edit dl rm
setjmp2.h	1705	0644	edit dl rm
shm.h	2766	0644	edit dl rm
shmlba.h	1106	0644	edit dl rm
sigaction.h	2935	0644	edit dl rm
sigcontext.h	4266	0644	edit dl rm
sigevent-consts.h	1471	0644	edit dl rm
siginfo-arch.h	729	0644	edit dl rm
siginfo-consts-arch.h	204	0644	edit dl rm
siginfo-consts.h	7036	0644	edit dl rm
signalfd.h	1067	0644	edit dl rm
signal_ext.h	1285	0644	edit dl rm
signum-arch.h	2580	0644	edit dl rm
signum-generic.h	3313	0644	edit dl rm
sigstack.h	1168	0644	edit dl rm
sigstksz.h	1278	0644	edit dl rm
sigthread.h	1692	0644	edit dl rm
sockaddr.h	1514	0644	edit dl rm
socket-constants.h	2497	0644	edit dl rm
socket.h	13554	0644	edit dl rm
socket2.h	3057	0644	edit dl rm
socket_type.h	2216	0644	edit dl rm
ss_flags.h	1188	0644	edit dl rm
stab.def	9040	0644	edit dl rm
stat.h	2231	0644	edit dl rm
statfs.h	1917	0644	edit dl rm
statvfs.h	3423	0644	edit dl rm
statx-generic.h	2187	0644	edit dl rm
statx.h	1400	0644	edit dl rm
stdint-intn.h	1037	0644	edit dl rm
stdint-uintn.h	1049	0644	edit dl rm
stdio-ldbl.h	3481	0644	edit dl rm
stdio.h	5599	0644	edit dl rm
stdio2-decl.h	4235	0644	edit dl rm
stdio2.h	10101	0644	edit dl rm
stdio_lim.h	1213	0644	edit dl rm
stdlib-bsearch.h	1557	0644	edit dl rm
stdlib-float.h	1115	0644	edit dl rm
stdlib-ldbl.h	2020	0644	edit dl rm
stdlib.h	5789	0644	edit dl rm
strings_fortified.h	1240	0644	edit dl rm
string_fortified.h	4345	0644	edit dl rm
struct_mutex.h	1810	0644	edit dl rm
struct_rwlock.h	2027	0644	edit dl rm
struct_stat.h	6190	0644	edit dl rm
struct_stat_time64_helper.h	2601	0644	edit dl rm
syscall.h	46524	0644	edit dl rm
syslog-ldbl.h	1204	0644	edit dl rm
syslog-path.h	1061	0644	edit dl rm
syslog.h	1969	0644	edit dl rm
sysmacros.h	2953	0644	edit dl rm
termios-baud.h	1824	0644	edit dl rm
termios-c_cc.h	1279	0644	edit dl rm
termios-c_cflag.h	1230	0644	edit dl rm
termios-c_iflag.h	1936	0644	edit dl rm
termios-c_lflag.h	2594	0644	edit dl rm
termios-c_oflag.h	2822	0644	edit dl rm
termios-misc.h	969	0644	edit dl rm
termios-struct.h	1433	0644	edit dl rm
termios-tcflow.h	1062	0644	edit dl rm
termios.h	2168	0644	edit dl rm
thread-shared-types.h	3927	0644	edit dl rm
time.h	3296	0644	edit dl rm
time64.h	1340	0644	edit dl rm
timerfd.h	1103	0644	edit dl rm
timesize.h	1081	0644	edit dl rm
timex.h	6198	0644	edit dl rm
types.h	8806	0644	edit dl rm
typesizes.h	3737	0644	edit dl rm
uintn-identity.h	1542	0644	edit dl rm
uio-ext.h	2086	0644	edit dl rm
uio_lim.h	1385	0644	edit dl rm
unistd.h	11653	0644	edit dl rm
unistd_ext.h	2538	0644	edit dl rm
utmp.h	4067	0644	edit dl rm
utmpx.h	3578	0644	edit dl rm
utsname.h	1213	0644	edit dl rm
waitflags.h	1697	0644	edit dl rm
waitstatus.h	2287	0644	edit dl rm
wchar-ldbl.h	3083	0644	edit dl rm
wchar.h	1906	0644	edit dl rm
wchar2-decl.h	4576	0644	edit dl rm
wchar2.h	14885	0644	edit dl rm
wctype-wchar.h	6307	0644	edit dl rm
wordsize.h	442	0644	edit dl rm
xopen_lim.h	3858	0644	edit dl rm

Edit: /usr/include/bits/socket.h (13554B)

/* System-specific socket constants and types.  Linux version.
   Copyright (C) 1991-2021 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; if not, see
   <https://www.gnu.org/licenses/>.  */

#ifndef __BITS_SOCKET_H
#define __BITS_SOCKET_H

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

#define __need_size_t
#include <stddef.h>

#include <sys/types.h>

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

/* Get the architecture-dependent definition of enum __socket_type.  */
#include <bits/socket_type.h>

/* Protocol families.  */
#define PF_UNSPEC	0	/* Unspecified.  */
#define PF_LOCAL	1	/* Local to host (pipes and file-domain).  */
#define PF_UNIX		PF_LOCAL /* POSIX name for PF_LOCAL.  */
#define PF_FILE		PF_LOCAL /* Another non-standard name for PF_LOCAL.  */
#define PF_INET		2	/* IP protocol family.  */
#define PF_AX25		3	/* Amateur Radio AX.25.  */
#define PF_IPX		4	/* Novell Internet Protocol.  */
#define PF_APPLETALK	5	/* Appletalk DDP.  */
#define PF_NETROM	6	/* Amateur radio NetROM.  */
#define PF_BRIDGE	7	/* Multiprotocol bridge.  */
#define PF_ATMPVC	8	/* ATM PVCs.  */
#define PF_X25		9	/* Reserved for X.25 project.  */
#define PF_INET6	10	/* IP version 6.  */
#define PF_ROSE		11	/* Amateur Radio X.25 PLP.  */
#define PF_DECnet	12	/* Reserved for DECnet project.  */
#define PF_NETBEUI	13	/* Reserved for 802.2LLC project.  */
#define PF_SECURITY	14	/* Security callback pseudo AF.  */
#define PF_KEY		15	/* PF_KEY key management API.  */
#define PF_NETLINK	16
#define PF_ROUTE	PF_NETLINK /* Alias to emulate 4.4BSD.  */
#define PF_PACKET	17	/* Packet family.  */
#define PF_ASH		18	/* Ash.  */
#define PF_ECONET	19	/* Acorn Econet.  */
#define PF_ATMSVC	20	/* ATM SVCs.  */
#define PF_RDS		21	/* RDS sockets.  */
#define PF_SNA		22	/* Linux SNA Project */
#define PF_IRDA		23	/* IRDA sockets.  */
#define PF_PPPOX	24	/* PPPoX sockets.  */
#define PF_WANPIPE	25	/* Wanpipe API sockets.  */
#define PF_LLC		26	/* Linux LLC.  */
#define PF_IB		27	/* Native InfiniBand address.  */
#define PF_MPLS		28	/* MPLS.  */
#define PF_CAN		29	/* Controller Area Network.  */
#define PF_TIPC		30	/* TIPC sockets.  */
#define PF_BLUETOOTH	31	/* Bluetooth sockets.  */
#define PF_IUCV		32	/* IUCV sockets.  */
#define PF_RXRPC	33	/* RxRPC sockets.  */
#define PF_ISDN		34	/* mISDN sockets.  */
#define PF_PHONET	35	/* Phonet sockets.  */
#define PF_IEEE802154	36	/* IEEE 802.15.4 sockets.  */
#define PF_CAIF		37	/* CAIF sockets.  */
#define PF_ALG		38	/* Algorithm sockets.  */
#define PF_NFC		39	/* NFC sockets.  */
#define PF_VSOCK	40	/* vSockets.  */
#define PF_KCM		41	/* Kernel Connection Multiplexor.  */
#define PF_QIPCRTR	42	/* Qualcomm IPC Router.  */
#define PF_SMC		43	/* SMC sockets.  */
#define PF_XDP		44	/* XDP sockets.  */
#define PF_MCTP		45	/* Management component transport protocol.  */
#define PF_MAX		46	/* For now..  */

/* 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_AX25		PF_AX25
#define AF_IPX		PF_IPX
#define AF_APPLETALK	PF_APPLETALK
#define AF_NETROM	PF_NETROM
#define AF_BRIDGE	PF_BRIDGE
#define AF_ATMPVC	PF_ATMPVC
#define AF_X25		PF_X25
#define AF_INET6	PF_INET6
#define AF_ROSE		PF_ROSE
#define AF_DECnet	PF_DECnet
#define AF_NETBEUI	PF_NETBEUI
#define AF_SECURITY	PF_SECURITY
#define AF_KEY		PF_KEY
#define AF_NETLINK	PF_NETLINK
#define AF_ROUTE	PF_ROUTE
#define AF_PACKET	PF_PACKET
#define AF_ASH		PF_ASH
#define AF_ECONET	PF_ECONET
#define AF_ATMSVC	PF_ATMSVC
#define AF_RDS		PF_RDS
#define AF_SNA		PF_SNA
#define AF_IRDA		PF_IRDA
#define AF_PPPOX	PF_PPPOX
#define AF_WANPIPE	PF_WANPIPE
#define AF_LLC		PF_LLC
#define AF_IB		PF_IB
#define AF_MPLS		PF_MPLS
#define AF_CAN		PF_CAN
#define AF_TIPC		PF_TIPC
#define AF_BLUETOOTH	PF_BLUETOOTH
#define AF_IUCV		PF_IUCV
#define AF_RXRPC	PF_RXRPC
#define AF_ISDN		PF_ISDN
#define AF_PHONET	PF_PHONET
#define AF_IEEE802154	PF_IEEE802154
#define AF_CAIF		PF_CAIF
#define AF_ALG		PF_ALG
#define AF_NFC		PF_NFC
#define AF_VSOCK	PF_VSOCK
#define AF_KCM		PF_KCM
#define AF_QIPCRTR	PF_QIPCRTR
#define AF_SMC		PF_SMC
#define AF_XDP		PF_XDP
#define AF_MCTP		PF_MCTP
#define AF_MAX		PF_MAX

/* Socket level values.  Others are defined in the appropriate headers.

XXX These definitions also should go into the appropriate headers as
   far as they are available.  */
#define SOL_RAW		255
#define SOL_DECNET      261
#define SOL_X25         262
#define SOL_PACKET	263
#define SOL_ATM		264	/* ATM layer (cell level).  */
#define SOL_AAL		265	/* ATM Adaption Layer (packet level).  */
#define SOL_IRDA	266
#define SOL_NETBEUI	267
#define SOL_LLC		268
#define SOL_DCCP	269
#define SOL_NETLINK	270
#define SOL_TIPC	271
#define SOL_RXRPC	272
#define SOL_PPPOL2TP	273
#define SOL_BLUETOOTH	274
#define SOL_PNPIPE	275
#define SOL_RDS		276
#define SOL_IUCV	277
#define SOL_CAIF	278
#define SOL_ALG		279
#define SOL_NFC		280
#define SOL_KCM		281
#define SOL_TLS		282
#define SOL_XDP		283
#define SOL_MPTCP	284
#define SOL_MCTP	285

/* Maximum queue length specifiable by listen.  */
#define SOMAXCONN	4096

/* 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).  */
#define __ss_aligntype	unsigned long int
#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
#ifdef __USE_GNU
    /* DECnet uses a different name.  */
    MSG_TRYHARD		= MSG_DONTROUTE,
# define MSG_TRYHARD	MSG_DONTROUTE
#endif
    MSG_CTRUNC		= 0x08,	/* Control data lost before delivery.  */
#define MSG_CTRUNC	MSG_CTRUNC
    MSG_PROXY		= 0x10,	/* Supply or ask second address.  */
#define MSG_PROXY	MSG_PROXY
    MSG_TRUNC		= 0x20,
#define MSG_TRUNC	MSG_TRUNC
    MSG_DONTWAIT	= 0x40, /* Nonblocking IO.  */
#define MSG_DONTWAIT	MSG_DONTWAIT
    MSG_EOR		= 0x80, /* End of record.  */
#define MSG_EOR		MSG_EOR
    MSG_WAITALL		= 0x100, /* Wait for a full request.  */
#define MSG_WAITALL	MSG_WAITALL
    MSG_FIN		= 0x200,
#define MSG_FIN		MSG_FIN
    MSG_SYN		= 0x400,
#define MSG_SYN		MSG_SYN
    MSG_CONFIRM		= 0x800, /* Confirm path validity.  */
#define MSG_CONFIRM	MSG_CONFIRM
    MSG_RST		= 0x1000,
#define MSG_RST		MSG_RST
    MSG_ERRQUEUE	= 0x2000, /* Fetch message from error queue.  */
#define MSG_ERRQUEUE	MSG_ERRQUEUE
    MSG_NOSIGNAL	= 0x4000, /* Do not generate SIGPIPE.  */
#define MSG_NOSIGNAL	MSG_NOSIGNAL
    MSG_MORE		= 0x8000,  /* Sender will send more.  */
#define MSG_MORE	MSG_MORE
    MSG_WAITFORONE	= 0x10000, /* Wait for at least one packet to return.*/
#define MSG_WAITFORONE	MSG_WAITFORONE
    MSG_BATCH		= 0x40000, /* sendmmsg: more messages coming.  */
#define MSG_BATCH	MSG_BATCH
    MSG_ZEROCOPY	= 0x4000000, /* Use user data in kernel path.  */
#define MSG_ZEROCOPY	MSG_ZEROCOPY
    MSG_FASTOPEN	= 0x20000000, /* Send data in TCP SYN.  */
#define MSG_FASTOPEN	MSG_FASTOPEN

MSG_CMSG_CLOEXEC	= 0x40000000	/* Set close_on_exit for file
					   descriptor received through
					   SCM_RIGHTS.  */
#define MSG_CMSG_CLOEXEC MSG_CMSG_CLOEXEC
  };

/* 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.  */
    size_t msg_iovlen;		/* Number of elements in the vector.  */

void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
    size_t msg_controllen;	/* Ancillary data buffer length.
				   !! The type should be socklen_t but the
				   definition of the kernel is incompatible
				   with this.  */

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

/* Structure used for storage of ancillary data object information.  */
struct cmsghdr
  {
    size_t cmsg_len;		/* Length of data in cmsg_data plus length
				   of cmsghdr structure.
				   !! The type should be socklen_t but the
				   definition of the kernel is incompatible
				   with this.  */
    int cmsg_level;		/* Originating protocol.  */
    int cmsg_type;		/* Protocol specific type.  */
#if __glibc_c99_flexarr_available
    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
#endif
  };

/* Ancillary data object manipulation macros.  */
#if __glibc_c99_flexarr_available
# 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 *) 0)
#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))

/* Given a length, return the additional padding necessary such that
   len + __CMSG_PADDING(len) == CMSG_ALIGN (len).  */
#define __CMSG_PADDING(len) ((sizeof (size_t) \
                              - ((len) & (sizeof (size_t) - 1))) \
                             & (sizeof (size_t) - 1))

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))
{
  /* We may safely assume that __cmsg lies between __mhdr->msg_control and
     __mhdr->msg_controllen because the user is required to obtain the first
     cmsg via CMSG_FIRSTHDR, set its length, then obtain subsequent cmsgs
     via CMSG_NXTHDR, setting lengths along the way.  However, we don't yet
     trust the value of __cmsg->cmsg_len and therefore do not use it in any
     pointer arithmetic until we check its value.  */

unsigned char * __msg_control_ptr = (unsigned char *) __mhdr->msg_control;
  unsigned char * __cmsg_ptr = (unsigned char *) __cmsg;

size_t __size_needed = sizeof (struct cmsghdr)
                         + __CMSG_PADDING (__cmsg->cmsg_len);

/* The current header is malformed, too small to be a full header.  */
  if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
    return (struct cmsghdr *) 0;

/* There isn't enough space between __cmsg and the end of the buffer to
  hold the current cmsg *and* the next one.  */
  if (((size_t)
         (__msg_control_ptr + __mhdr->msg_controllen - __cmsg_ptr)
       < __size_needed)
      || ((size_t)
            (__msg_control_ptr + __mhdr->msg_controllen - __cmsg_ptr
             - __size_needed)
          < __cmsg->cmsg_len))

return (struct cmsghdr *) 0;

/* Now, we trust cmsg_len and can use it to find the next header.  */
  __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
			       + CMSG_ALIGN (__cmsg->cmsg_len));
  return __cmsg;
}
#endif	/* Use `extern inline'.  */

/* Socket level message types.  This must match the definitions in
   <linux/socket.h>.  */
enum
  {
    SCM_RIGHTS = 0x01		/* Transfer file descriptors.  */
#define SCM_RIGHTS SCM_RIGHTS
#ifdef __USE_GNU
    , SCM_CREDENTIALS = 0x02	/* Credentials passing.  */
# define SCM_CREDENTIALS SCM_CREDENTIALS
#endif
  };

#ifdef __USE_GNU
/* User visible structure for SCM_CREDENTIALS message */
struct ucred
{
  pid_t pid;			/* PID of sending process.  */
  uid_t uid;			/* UID of sending process.  */
  gid_t gid;			/* GID of sending process.  */
};
#endif

#ifdef __USE_MISC
# include <bits/types/time_t.h>
# include <asm/socket.h>
#else
# define SO_DEBUG 1
# include <bits/socket-constants.h>
#endif

/* 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 */

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