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406 lines
14 KiB
C
406 lines
14 KiB
C
/* System-specific socket constants and types. Linux version.
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Copyright (C) 1991-2025 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
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License as published by the Free Software Foundation; either
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version 2.1 of the 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; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef __BITS_SOCKET_H
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#define __BITS_SOCKET_H
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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 <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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/* Get the architecture-dependent definition of enum __socket_type. */
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#include <bits/socket_type.h>
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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 /* POSIX name for PF_LOCAL. */
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#define PF_FILE PF_LOCAL /* Another non-standard name for PF_LOCAL. */
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#define PF_INET 2 /* IP protocol family. */
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#define PF_AX25 3 /* Amateur Radio AX.25. */
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#define PF_IPX 4 /* Novell Internet Protocol. */
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#define PF_APPLETALK 5 /* Appletalk DDP. */
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#define PF_NETROM 6 /* Amateur radio NetROM. */
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#define PF_BRIDGE 7 /* Multiprotocol bridge. */
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#define PF_ATMPVC 8 /* ATM PVCs. */
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#define PF_X25 9 /* Reserved for X.25 project. */
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#define PF_INET6 10 /* IP version 6. */
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#define PF_ROSE 11 /* Amateur Radio X.25 PLP. */
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#define PF_DECnet 12 /* Reserved for DECnet project. */
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#define PF_NETBEUI 13 /* Reserved for 802.2LLC project. */
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#define PF_SECURITY 14 /* Security callback pseudo AF. */
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#define PF_KEY 15 /* PF_KEY key management API. */
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#define PF_NETLINK 16
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#define PF_ROUTE PF_NETLINK /* Alias to emulate 4.4BSD. */
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#define PF_PACKET 17 /* Packet family. */
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#define PF_ASH 18 /* Ash. */
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#define PF_ECONET 19 /* Acorn Econet. */
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#define PF_ATMSVC 20 /* ATM SVCs. */
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#define PF_RDS 21 /* RDS sockets. */
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#define PF_SNA 22 /* Linux SNA Project */
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#define PF_IRDA 23 /* IRDA sockets. */
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#define PF_PPPOX 24 /* PPPoX sockets. */
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#define PF_WANPIPE 25 /* Wanpipe API sockets. */
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#define PF_LLC 26 /* Linux LLC. */
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#define PF_IB 27 /* Native InfiniBand address. */
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#define PF_MPLS 28 /* MPLS. */
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#define PF_CAN 29 /* Controller Area Network. */
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#define PF_TIPC 30 /* TIPC sockets. */
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#define PF_BLUETOOTH 31 /* Bluetooth sockets. */
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#define PF_IUCV 32 /* IUCV sockets. */
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#define PF_RXRPC 33 /* RxRPC sockets. */
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#define PF_ISDN 34 /* mISDN sockets. */
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#define PF_PHONET 35 /* Phonet sockets. */
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#define PF_IEEE802154 36 /* IEEE 802.15.4 sockets. */
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#define PF_CAIF 37 /* CAIF sockets. */
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#define PF_ALG 38 /* Algorithm sockets. */
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#define PF_NFC 39 /* NFC sockets. */
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#define PF_VSOCK 40 /* vSockets. */
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#define PF_KCM 41 /* Kernel Connection Multiplexor. */
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#define PF_QIPCRTR 42 /* Qualcomm IPC Router. */
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#define PF_SMC 43 /* SMC sockets. */
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#define PF_XDP 44 /* XDP sockets. */
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#define PF_MCTP 45 /* Management component transport protocol. */
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#define PF_MAX 46 /* For now.. */
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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_AX25 PF_AX25
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#define AF_IPX PF_IPX
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#define AF_APPLETALK PF_APPLETALK
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#define AF_NETROM PF_NETROM
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#define AF_BRIDGE PF_BRIDGE
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#define AF_ATMPVC PF_ATMPVC
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#define AF_X25 PF_X25
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#define AF_INET6 PF_INET6
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#define AF_ROSE PF_ROSE
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#define AF_DECnet PF_DECnet
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#define AF_NETBEUI PF_NETBEUI
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#define AF_SECURITY PF_SECURITY
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#define AF_KEY PF_KEY
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#define AF_NETLINK PF_NETLINK
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#define AF_ROUTE PF_ROUTE
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#define AF_PACKET PF_PACKET
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#define AF_ASH PF_ASH
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#define AF_ECONET PF_ECONET
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#define AF_ATMSVC PF_ATMSVC
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#define AF_RDS PF_RDS
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#define AF_SNA PF_SNA
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#define AF_IRDA PF_IRDA
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#define AF_PPPOX PF_PPPOX
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#define AF_WANPIPE PF_WANPIPE
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#define AF_LLC PF_LLC
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#define AF_IB PF_IB
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#define AF_MPLS PF_MPLS
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#define AF_CAN PF_CAN
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#define AF_TIPC PF_TIPC
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#define AF_BLUETOOTH PF_BLUETOOTH
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#define AF_IUCV PF_IUCV
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#define AF_RXRPC PF_RXRPC
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#define AF_ISDN PF_ISDN
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#define AF_PHONET PF_PHONET
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#define AF_IEEE802154 PF_IEEE802154
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#define AF_CAIF PF_CAIF
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#define AF_ALG PF_ALG
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#define AF_NFC PF_NFC
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#define AF_VSOCK PF_VSOCK
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#define AF_KCM PF_KCM
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#define AF_QIPCRTR PF_QIPCRTR
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#define AF_SMC PF_SMC
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#define AF_XDP PF_XDP
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#define AF_MCTP PF_MCTP
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#define AF_MAX PF_MAX
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/* Socket level values. Others are defined in the appropriate headers.
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XXX These definitions also should go into the appropriate headers as
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far as they are available. */
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#define SOL_RAW 255
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#define SOL_DECNET 261
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#define SOL_X25 262
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#define SOL_PACKET 263
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#define SOL_ATM 264 /* ATM layer (cell level). */
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#define SOL_AAL 265 /* ATM Adaption Layer (packet level). */
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#define SOL_IRDA 266
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#define SOL_NETBEUI 267
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#define SOL_LLC 268
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#define SOL_DCCP 269
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#define SOL_NETLINK 270
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#define SOL_TIPC 271
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#define SOL_RXRPC 272
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#define SOL_PPPOL2TP 273
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#define SOL_BLUETOOTH 274
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#define SOL_PNPIPE 275
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#define SOL_RDS 276
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#define SOL_IUCV 277
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#define SOL_CAIF 278
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#define SOL_ALG 279
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#define SOL_NFC 280
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#define SOL_KCM 281
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#define SOL_TLS 282
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#define SOL_XDP 283
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#define SOL_MPTCP 284
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#define SOL_MCTP 285
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#define SOL_SMC 286
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#define SOL_VSOCK 287
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/* Maximum queue length specifiable by listen. */
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#define SOMAXCONN 4096
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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 __attribute_struct_may_alias__ 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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#define __ss_aligntype unsigned long int
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#define _SS_PADSIZE \
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(_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype))
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struct __attribute_struct_may_alias__ 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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#ifdef __USE_GNU
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/* DECnet uses a different name. */
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MSG_TRYHARD = MSG_DONTROUTE,
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# define MSG_TRYHARD MSG_DONTROUTE
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#endif
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MSG_CTRUNC = 0x08, /* Control data lost before delivery. */
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#define MSG_CTRUNC MSG_CTRUNC
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MSG_PROXY = 0x10, /* Supply or ask second address. */
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#define MSG_PROXY MSG_PROXY
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MSG_TRUNC = 0x20,
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#define MSG_TRUNC MSG_TRUNC
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MSG_DONTWAIT = 0x40, /* Nonblocking IO. */
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#define MSG_DONTWAIT MSG_DONTWAIT
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MSG_EOR = 0x80, /* End of record. */
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#define MSG_EOR MSG_EOR
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MSG_WAITALL = 0x100, /* Wait for a full request. */
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#define MSG_WAITALL MSG_WAITALL
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MSG_FIN = 0x200,
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#define MSG_FIN MSG_FIN
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MSG_SYN = 0x400,
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#define MSG_SYN MSG_SYN
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MSG_CONFIRM = 0x800, /* Confirm path validity. */
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#define MSG_CONFIRM MSG_CONFIRM
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MSG_RST = 0x1000,
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#define MSG_RST MSG_RST
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MSG_ERRQUEUE = 0x2000, /* Fetch message from error queue. */
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#define MSG_ERRQUEUE MSG_ERRQUEUE
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MSG_NOSIGNAL = 0x4000, /* Do not generate SIGPIPE. */
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#define MSG_NOSIGNAL MSG_NOSIGNAL
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MSG_MORE = 0x8000, /* Sender will send more. */
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#define MSG_MORE MSG_MORE
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MSG_WAITFORONE = 0x10000, /* Wait for at least one packet to return.*/
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#define MSG_WAITFORONE MSG_WAITFORONE
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MSG_BATCH = 0x40000, /* sendmmsg: more messages coming. */
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#define MSG_BATCH MSG_BATCH
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MSG_SOCK_DEVMEM = 0x2000000, /* Receive devmem skbs as cmsg. */
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#define MSG_SOCK_DEVMEM MSG_SOCK_DEVMEM
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MSG_ZEROCOPY = 0x4000000, /* Use user data in kernel path. */
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#define MSG_ZEROCOPY MSG_ZEROCOPY
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MSG_FASTOPEN = 0x20000000, /* Send data in TCP SYN. */
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#define MSG_FASTOPEN MSG_FASTOPEN
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MSG_CMSG_CLOEXEC = 0x40000000 /* Set close_on_exit for file
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descriptor received through
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SCM_RIGHTS. */
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#define MSG_CMSG_CLOEXEC MSG_CMSG_CLOEXEC
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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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size_t 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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size_t msg_controllen; /* Ancillary data buffer length.
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!! The type should be socklen_t but the
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definition of the kernel is incompatible
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with this. */
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int msg_flags; /* Flags on 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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size_t cmsg_len; /* Length of data in cmsg_data plus length
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of cmsghdr structure.
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!! The type should be socklen_t but the
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definition of the kernel is incompatible
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with this. */
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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. This must match the definitions in
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<linux/socket.h>. */
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enum
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{
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SCM_RIGHTS = 0x01 /* Transfer file descriptors. */
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#define SCM_RIGHTS SCM_RIGHTS
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#ifdef __USE_GNU
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, SCM_CREDENTIALS = 0x02 /* Credentials passing. */
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# define SCM_CREDENTIALS SCM_CREDENTIALS
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, SCM_SECURITY = 0x03 /* Security label. */
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# define SCM_SECURITY SCM_SECURITY
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, SCM_PIDFD = 0x04 /* Pidfd. */
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# define SCM_PIDFD SCM_PIDFD
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#endif
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};
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#ifdef __USE_GNU
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/* User visible structure for SCM_CREDENTIALS message */
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struct ucred
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{
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pid_t pid; /* PID of sending process. */
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uid_t uid; /* UID of sending process. */
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gid_t gid; /* GID of sending process. */
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};
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#endif
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#ifdef __USE_MISC
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# include <bits/types/time_t.h>
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# include <asm/socket.h>
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#else
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# define SO_DEBUG 1
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# include <bits/socket-constants.h>
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#endif
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/* Structure used to manipulate the SO_LINGER option. */
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struct linger
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{
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int l_onoff; /* Nonzero to linger on close. */
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int l_linger; /* Time to linger. */
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};
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#endif /* bits/socket.h */
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