396 lines
14 KiB
C
396 lines
14 KiB
C
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/* System-specific socket constants and types. Hurd version.
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Copyright (C) 1991-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#ifndef __BITS_SOCKET_H
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#define __BITS_SOCKET_H 1
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#ifndef _SYS_SOCKET_H
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# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
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#endif
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#define __need_size_t
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#include <stddef.h>
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#include <bits/wordsize.h>
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#include <sys/types.h>
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/* Type for length arguments in socket calls. */
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#ifndef __socklen_t_defined
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typedef __socklen_t socklen_t;
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# define __socklen_t_defined
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#endif
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/* Types of sockets. */
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enum __socket_type
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{
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SOCK_STREAM = 1, /* Sequenced, reliable, connection-based
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byte streams. */
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#define SOCK_STREAM SOCK_STREAM
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SOCK_DGRAM = 2, /* Connectionless, unreliable datagrams
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of fixed maximum length. */
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#define SOCK_DGRAM SOCK_DGRAM
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SOCK_RAW = 3, /* Raw protocol interface. */
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#define SOCK_RAW SOCK_RAW
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SOCK_RDM = 4, /* Reliably-delivered messages. */
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#define SOCK_RDM SOCK_RDM
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SOCK_SEQPACKET = 5, /* Sequenced, reliable, connection-based,
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datagrams of fixed maximum length. */
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#define SOCK_SEQPACKET SOCK_SEQPACKET
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#define SOCK_MAX (SOCK_SEQPACKET + 1)
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/* Mask which covers at least up to SOCK_MASK-1. The
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remaining bits are used as flags. */
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#define SOCK_TYPE_MASK 0xf
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/* Flags to be ORed into the type parameter of socket and socketpair and
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used for the flags parameter of accept4. */
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SOCK_CLOEXEC = 0x00400000, /* Atomically set close-on-exec flag for the
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new descriptor(s). */
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#define SOCK_CLOEXEC SOCK_CLOEXEC
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/* Changed from the O_NONBLOCK value (0x8, which is unusable for us as it is
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conflicting with the original SOCK_* flags' values) to the Linux value
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(04000). TODO: is there a ``better'' value? */
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SOCK_NONBLOCK = 0x0800 /* Atomically mark descriptor(s) as
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non-blocking. */
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#define SOCK_NONBLOCK SOCK_NONBLOCK
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};
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/* Protocol families. */
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#define PF_UNSPEC 0 /* Unspecified. */
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#define PF_LOCAL 1 /* Local to host (pipes and file-domain). */
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#define PF_UNIX PF_LOCAL /* Old BSD name for PF_LOCAL. */
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#define PF_FILE PF_LOCAL /* POSIX name for PF_LOCAL. */
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#define PF_INET 2 /* IP protocol family. */
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#define PF_IMPLINK 3 /* ARPAnet IMP protocol. */
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#define PF_PUP 4 /* PUP protocols. */
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#define PF_CHAOS 5 /* MIT Chaos protocols. */
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#define PF_NS 6 /* Xerox NS protocols. */
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#define PF_ISO 7 /* ISO protocols. */
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#define PF_OSI PF_ISO
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#define PF_ECMA 8 /* ECMA protocols. */
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#define PF_DATAKIT 9 /* AT&T Datakit protocols. */
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#define PF_CCITT 10 /* CCITT protocols (X.25 et al). */
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#define PF_SNA 11 /* IBM SNA protocol. */
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#define PF_DECnet 12 /* DECnet protocols. */
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#define PF_DLI 13 /* Direct data link interface. */
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#define PF_LAT 14 /* DEC Local Area Transport protocol. */
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#define PF_HYLINK 15 /* NSC Hyperchannel protocol. */
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#define PF_APPLETALK 16 /* Don't use this. */
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#define PF_ROUTE 17 /* Internal Routing Protocol. */
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#define PF_LINK 18 /* Link layer interface. */
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#define PF_XTP 19 /* eXpress Transfer Protocol (no AF). */
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#define PF_COIP 20 /* Connection-oriented IP, aka ST II. */
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#define PF_CNT 21 /* Computer Network Technology. */
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#define PF_RTIP 22 /* Help Identify RTIP packets. **/
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#define PF_IPX 23 /* Novell Internet Protocol. */
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#define PF_SIP 24 /* Simple Internet Protocol. */
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#define PF_PIP 25 /* Help Identify PIP packets. */
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#define PF_INET6 26 /* IP version 6. */
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#define PF_MAX 27
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/* Address families. */
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#define AF_UNSPEC PF_UNSPEC
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#define AF_LOCAL PF_LOCAL
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#define AF_UNIX PF_UNIX
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#define AF_FILE PF_FILE
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#define AF_INET PF_INET
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#define AF_IMPLINK PF_IMPLINK
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#define AF_PUP PF_PUP
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#define AF_CHAOS PF_CHAOS
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#define AF_NS PF_NS
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#define AF_ISO PF_ISO
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#define AF_OSI PF_OSI
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#define AF_ECMA PF_ECMA
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#define AF_DATAKIT PF_DATAKIT
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#define AF_CCITT PF_CCITT
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#define AF_SNA PF_SNA
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#define AF_DECnet PF_DECnet
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#define AF_DLI PF_DLI
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#define AF_LAT PF_LAT
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#define AF_HYLINK PF_HYLINK
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#define AF_APPLETALK PF_APPLETALK
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#define AF_ROUTE PF_ROUTE
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#define AF_LINK PF_LINK
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#ifdef __USE_MISC
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# define pseudo_AF_XTP PF_XTP
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#endif
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#define AF_COIP PF_COIP
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#define AF_CNT PF_CNT
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#ifdef __USE_MISC
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# define pseudo_AF_RTIP PF_RTIP
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#endif
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#define AF_IPX PF_IPX
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#define AF_SIP PF_SIP
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#ifdef __USE_MISC
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# define pseudo_AF_PIP PF_PIP
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#endif
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#define AF_INET6 PF_INET6
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#define AF_MAX PF_MAX
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/* Maximum queue length specifiable by listen. */
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#define SOMAXCONN 128 /* 5 on the origional 4.4 BSD. */
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/* Get the definition of the macro to define the common sockaddr members. */
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#include <bits/sockaddr.h>
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/* Structure describing a generic socket address. */
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struct sockaddr
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{
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__SOCKADDR_COMMON (sa_); /* Common data: address family and length. */
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char sa_data[14]; /* Address data. */
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};
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/* Structure large enough to hold any socket address (with the historical
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exception of AF_UNIX). */
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#if __WORDSIZE == 64
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# define __ss_aligntype __uint64_t
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#else
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# define __ss_aligntype __uint32_t
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#endif
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#define _SS_PADSIZE \
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(_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype))
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struct sockaddr_storage
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{
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__SOCKADDR_COMMON (ss_); /* Address family, etc. */
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char __ss_padding[_SS_PADSIZE];
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__ss_aligntype __ss_align; /* Force desired alignment. */
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};
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/* Bits in the FLAGS argument to `send', `recv', et al. */
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enum
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{
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MSG_OOB = 0x01, /* Process out-of-band data. */
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#define MSG_OOB MSG_OOB
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MSG_PEEK = 0x02, /* Peek at incoming messages. */
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#define MSG_PEEK MSG_PEEK
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MSG_DONTROUTE = 0x04, /* Don't use local routing. */
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#define MSG_DONTROUTE MSG_DONTROUTE
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MSG_EOR = 0x08, /* Data completes record. */
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#define MSG_EOR MSG_EOR
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MSG_TRUNC = 0x10, /* Data discarded before delivery. */
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#define MSG_TRUNC MSG_TRUNC
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MSG_CTRUNC = 0x20, /* Control data lost before delivery. */
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#define MSG_CTRUNC MSG_CTRUNC
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MSG_WAITALL = 0x40, /* Wait for full request or error. */
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#define MSG_WAITALL MSG_WAITALL
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MSG_DONTWAIT = 0x80, /* This message should be nonblocking. */
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#define MSG_DONTWAIT MSG_DONTWAIT
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MSG_NOSIGNAL = 0x0400 /* Do not generate SIGPIPE on EPIPE. */
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#define MSG_NOSIGNAL MSG_NOSIGNAL
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};
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/* Structure describing messages sent by
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`sendmsg' and received by `recvmsg'. */
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struct msghdr
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{
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void *msg_name; /* Address to send to/receive from. */
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socklen_t msg_namelen; /* Length of address data. */
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struct iovec *msg_iov; /* Vector of data to send/receive into. */
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int msg_iovlen; /* Number of elements in the vector. */
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void *msg_control; /* Ancillary data (eg BSD filedesc passing). */
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socklen_t msg_controllen; /* Ancillary data buffer length. */
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int msg_flags; /* Flags in received message. */
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};
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/* Structure used for storage of ancillary data object information. */
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struct cmsghdr
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{
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socklen_t cmsg_len; /* Length of data in cmsg_data plus length
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of cmsghdr structure. */
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int cmsg_level; /* Originating protocol. */
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int cmsg_type; /* Protocol specific type. */
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#if __glibc_c99_flexarr_available
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__extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data. */
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#endif
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};
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/* Ancillary data object manipulation macros. */
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#if __glibc_c99_flexarr_available
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# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
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#else
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# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
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#endif
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#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
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#define CMSG_FIRSTHDR(mhdr) \
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((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr) \
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? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) 0)
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#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
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& (size_t) ~(sizeof (size_t) - 1))
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#define CMSG_SPACE(len) (CMSG_ALIGN (len) \
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+ CMSG_ALIGN (sizeof (struct cmsghdr)))
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#define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
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/* Given a length, return the additional padding necessary such that
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len + __CMSG_PADDING(len) == CMSG_ALIGN (len). */
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#define __CMSG_PADDING(len) ((sizeof (size_t) \
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- ((len) & (sizeof (size_t) - 1))) \
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& (sizeof (size_t) - 1))
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extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr,
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struct cmsghdr *__cmsg) __THROW;
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#ifdef __USE_EXTERN_INLINES
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# ifndef _EXTERN_INLINE
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# define _EXTERN_INLINE __extern_inline
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# endif
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_EXTERN_INLINE struct cmsghdr *
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__NTH (__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg))
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{
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/* We may safely assume that __cmsg lies between __mhdr->msg_control and
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__mhdr->msg_controllen because the user is required to obtain the first
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cmsg via CMSG_FIRSTHDR, set its length, then obtain subsequent cmsgs
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via CMSG_NXTHDR, setting lengths along the way. However, we don't yet
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trust the value of __cmsg->cmsg_len and therefore do not use it in any
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pointer arithmetic until we check its value. */
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unsigned char * __msg_control_ptr = (unsigned char *) __mhdr->msg_control;
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unsigned char * __cmsg_ptr = (unsigned char *) __cmsg;
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size_t __size_needed = sizeof (struct cmsghdr)
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+ __CMSG_PADDING (__cmsg->cmsg_len);
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/* The current header is malformed, too small to be a full header. */
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if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
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return (struct cmsghdr *) 0;
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/* There isn't enough space between __cmsg and the end of the buffer to
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hold the current cmsg *and* the next one. */
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if (((size_t)
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(__msg_control_ptr + __mhdr->msg_controllen - __cmsg_ptr)
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< __size_needed)
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|| ((size_t)
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(__msg_control_ptr + __mhdr->msg_controllen - __cmsg_ptr
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- __size_needed)
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< __cmsg->cmsg_len))
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return (struct cmsghdr *) 0;
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/* Now, we trust cmsg_len and can use it to find the next header. */
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__cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
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+ CMSG_ALIGN (__cmsg->cmsg_len));
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return __cmsg;
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}
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#endif /* Use `extern inline'. */
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/* Socket level message types. */
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enum
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{
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SCM_RIGHTS = 0x01, /* Access rights (array of int). */
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#define SCM_RIGHTS SCM_RIGHTS
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SCM_TIMESTAMP = 0x02, /* Timestamp (struct timeval). */
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#define SCM_TIMESTAMP SCM_TIMESTAMP
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SCM_CREDS = 0x03 /* Process creds (struct cmsgcred). */
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#define SCM_CREDS SCM_CREDS
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};
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#ifdef __USE_MISC
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/* Unfortunately, BSD practice dictates this structure be of fixed size.
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If there are more than CMGROUP_MAX groups, the list is truncated.
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(On GNU systems, the `cmcred_euid' field is just the first in the
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list of effective UIDs.) */
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#define CMGROUP_MAX 16
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/* Structure delivered by SCM_CREDS. This describes the identity of the
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sender of the data simultaneously received on the socket. By BSD
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convention, this is included only when a sender on a AF_LOCAL socket
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sends cmsg data of this type and size; the sender's structure is
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ignored, and the system fills in the various IDs of the sender process. */
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struct cmsgcred
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{
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__pid_t cmcred_pid;
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__uid_t cmcred_uid;
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__uid_t cmcred_euid;
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__gid_t cmcred_gid;
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int cmcred_ngroups;
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__gid_t cmcred_groups[CMGROUP_MAX];
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};
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#endif
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/* Protocol number used to manipulate socket-level options
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with `getsockopt' and `setsockopt'. */
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#define SOL_SOCKET 0xffff
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/* Socket-level options for `getsockopt' and `setsockopt'. */
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
SO_DEBUG = 0x0001, /* Record debugging information. */
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||
|
|
#define SO_DEBUG SO_DEBUG
|
||
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|
SO_ACCEPTCONN = 0x0002, /* Accept connections on socket. */
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||
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#define SO_ACCEPTCONN SO_ACCEPTCONN
|
||
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|
SO_REUSEADDR = 0x0004, /* Allow reuse of local addresses. */
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||
|
|
#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 */
|