1/* $OpenBSD: socket.h,v 1.105 2022/09/03 21:13:48 mbuhl Exp $ */ 2/* $NetBSD: socket.h,v 1.14 1996/02/09 18:25:36 christos Exp $ */ 3 4/* 5 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)socket.h 8.4 (Berkeley) 2/21/94 33 */ 34 35#ifndef _SYS_SOCKET_H_ 36#define _SYS_SOCKET_H_ 37 38/* get the definitions for struct iovec, size_t, ssize_t, and <sys/cdefs.h> */ 39#include <sys/uio.h> 40 41#if __BSD_VISIBLE 42#include <sys/types.h> /* for off_t, uid_t, and gid_t */ 43#endif 44 45#ifndef _SOCKLEN_T_DEFINED_ 46#define _SOCKLEN_T_DEFINED_ 47typedef __socklen_t socklen_t; /* length type for network syscalls */ 48#endif 49 50#ifndef _SA_FAMILY_T_DEFINED_ 51#define _SA_FAMILY_T_DEFINED_ 52typedef __sa_family_t sa_family_t; /* sockaddr address family type */ 53#endif 54 55 56/* 57 * Definitions related to sockets: types, address families, options. 58 */ 59 60/* 61 * Types 62 */ 63#define SOCK_STREAM 1 /* stream socket */ 64#define SOCK_DGRAM 2 /* datagram socket */ 65#define SOCK_RAW 3 /* raw-protocol interface */ 66#define SOCK_RDM 4 /* reliably-delivered message */ 67#define SOCK_SEQPACKET 5 /* sequenced packet stream */ 68#ifdef _KERNEL 69#define SOCK_TYPE_MASK 0x000F /* mask that covers the above */ 70#endif 71 72/* 73 * Socket creation flags 74 */ 75#if __BSD_VISIBLE 76#define SOCK_CLOEXEC 0x8000 /* set FD_CLOEXEC */ 77#define SOCK_NONBLOCK 0x4000 /* set O_NONBLOCK */ 78#ifdef _KERNEL 79#define SOCK_NONBLOCK_INHERIT 0x2000 /* inherit O_NONBLOCK from listener */ 80#endif 81#define SOCK_DNS 0x1000 /* set SS_DNS */ 82#endif /* __BSD_VISIBLE */ 83 84/* 85 * Option flags per-socket. 86 */ 87#define SO_DEBUG 0x0001 /* turn on debugging info recording */ 88#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ 89#define SO_REUSEADDR 0x0004 /* allow local address reuse */ 90#define SO_KEEPALIVE 0x0008 /* keep connections alive */ 91#define SO_DONTROUTE 0x0010 /* just use interface addresses */ 92#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ 93#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ 94#define SO_LINGER 0x0080 /* linger on close if data present */ 95#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ 96#define SO_REUSEPORT 0x0200 /* allow local address & port reuse */ 97#define SO_TIMESTAMP 0x0800 /* timestamp received dgram traffic */ 98#define SO_BINDANY 0x1000 /* allow bind to any address */ 99#define SO_ZEROIZE 0x2000 /* zero out all mbufs sent over socket */ 100 101/* 102 * Additional options, not kept in so_options. 103 */ 104#define SO_SNDBUF 0x1001 /* send buffer size */ 105#define SO_RCVBUF 0x1002 /* receive buffer size */ 106#define SO_SNDLOWAT 0x1003 /* send low-water mark */ 107#define SO_RCVLOWAT 0x1004 /* receive low-water mark */ 108#define SO_SNDTIMEO 0x1005 /* send timeout */ 109#define SO_RCVTIMEO 0x1006 /* receive timeout */ 110#define SO_ERROR 0x1007 /* get error status and clear */ 111#define SO_TYPE 0x1008 /* get socket type */ 112#define SO_NETPROC 0x1020 /* multiplex; network processing */ 113#define SO_RTABLE 0x1021 /* routing table to be used */ 114#define SO_PEERCRED 0x1022 /* get connect-time credentials */ 115#define SO_SPLICE 0x1023 /* splice data to other socket */ 116#define SO_DOMAIN 0x1024 /* get socket domain */ 117#define SO_PROTOCOL 0x1025 /* get socket protocol */ 118 119/* 120 * Structure used for manipulating linger option. 121 */ 122struct linger { 123 int l_onoff; /* option on/off */ 124 int l_linger; /* linger time */ 125}; 126 127#if __BSD_VISIBLE 128 129#ifndef _TIMEVAL_DECLARED 130#define _TIMEVAL_DECLARED 131struct timeval { 132 time_t tv_sec; /* seconds */ 133 suseconds_t tv_usec; /* and microseconds */ 134}; 135#endif 136 137/* 138 * Structure used for manipulating splice option. 139 */ 140struct splice { 141 int sp_fd; /* drain socket file descriptor */ 142 off_t sp_max; /* if set, maximum bytes to splice */ 143 struct timeval sp_idle; /* idle timeout */ 144}; 145 146/* 147 * Maximum number of alternate routing tables 148 */ 149#define RT_TABLEID_MAX 255 150#define RT_TABLEID_BITS 8 151#define RT_TABLEID_MASK 0xff 152 153#endif /* __BSD_VISIBLE */ 154 155/* 156 * Level number for (get/set)sockopt() to apply to socket itself. 157 */ 158#define SOL_SOCKET 0xffff /* options for socket level */ 159 160/* 161 * Address families. 162 */ 163#define AF_UNSPEC 0 /* unspecified */ 164#define AF_UNIX 1 /* local to host */ 165#define AF_LOCAL AF_UNIX /* draft POSIX compatibility */ 166#define AF_INET 2 /* internetwork: UDP, TCP, etc. */ 167#define AF_IMPLINK 3 /* arpanet imp addresses */ 168#define AF_PUP 4 /* pup protocols: e.g. BSP */ 169#define AF_CHAOS 5 /* mit CHAOS protocols */ 170#define AF_NS 6 /* XEROX NS protocols */ 171#define AF_ISO 7 /* ISO protocols */ 172#define AF_OSI AF_ISO 173#define AF_ECMA 8 /* european computer manufacturers */ 174#define AF_DATAKIT 9 /* datakit protocols */ 175#define AF_CCITT 10 /* CCITT protocols, X.25 etc */ 176#define AF_SNA 11 /* IBM SNA */ 177#define AF_DECnet 12 /* DECnet */ 178#define AF_DLI 13 /* DEC Direct data link interface */ 179#define AF_LAT 14 /* LAT */ 180#define AF_HYLINK 15 /* NSC Hyperchannel */ 181#define AF_APPLETALK 16 /* Apple Talk */ 182#define AF_ROUTE 17 /* Internal Routing Protocol */ 183#define AF_LINK 18 /* Link layer interface */ 184#define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */ 185#define AF_COIP 20 /* connection-oriented IP, aka ST II */ 186#define AF_CNT 21 /* Computer Network Technology */ 187#define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */ 188#define AF_IPX 23 /* Novell Internet Protocol */ 189#define AF_INET6 24 /* IPv6 */ 190#define pseudo_AF_PIP 25 /* Help Identify PIP packets */ 191#define AF_ISDN 26 /* Integrated Services Digital Network*/ 192#define AF_E164 AF_ISDN /* CCITT E.164 recommendation */ 193#define AF_NATM 27 /* native ATM access */ 194#define AF_ENCAP 28 195#define AF_SIP 29 /* Simple Internet Protocol */ 196#define AF_KEY 30 197#define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers 198 in interface output routine */ 199#define AF_BLUETOOTH 32 /* Bluetooth */ 200#define AF_MPLS 33 /* MPLS */ 201#define pseudo_AF_PFLOW 34 /* pflow */ 202#define pseudo_AF_PIPEX 35 /* PIPEX */ 203#define AF_MAX 36 204 205/* 206 * Structure used by kernel to store most 207 * addresses. 208 */ 209struct sockaddr { 210 __uint8_t sa_len; /* total length */ 211 sa_family_t sa_family; /* address family */ 212 char sa_data[14]; /* actually longer; address value */ 213}; 214 215/* 216 * Sockaddr type which can hold any sockaddr type available 217 * in the system. 218 * 219 * Note: __ss_{len,family} is defined in RFC2553. During RFC2553 discussion 220 * the field name went back and forth between ss_len and __ss_len, 221 * and RFC2553 specifies it to be __ss_len. openbsd picked ss_len. 222 * For maximum portability, userland programmer would need to 223 * (1) make the code never touch ss_len portion (cast it into sockaddr and 224 * touch sa_len), or (2) add "-Dss_len=__ss_len" into CFLAGS to unify all 225 * occurrences (including header file) to __ss_len. 226 */ 227struct sockaddr_storage { 228 __uint8_t ss_len; /* total length */ 229 sa_family_t ss_family; /* address family */ 230 unsigned char __ss_pad1[6]; /* align to quad */ 231 __uint64_t __ss_pad2; /* force alignment for stupid compilers */ 232 unsigned char __ss_pad3[240]; /* pad to a total of 256 bytes */ 233}; 234 235#ifdef _KERNEL 236/* 237 * Structure used by kernel to pass protocol 238 * information in raw sockets. 239 */ 240struct sockproto { 241 unsigned short sp_family; /* address family */ 242 unsigned short sp_protocol; /* protocol */ 243}; 244#endif /* _KERNEL */ 245 246/* 247 * Protocol families, same as address families for now. 248 */ 249#define PF_UNSPEC AF_UNSPEC 250#define PF_LOCAL AF_LOCAL 251#define PF_UNIX AF_UNIX 252#define PF_INET AF_INET 253#define PF_IMPLINK AF_IMPLINK 254#define PF_PUP AF_PUP 255#define PF_CHAOS AF_CHAOS 256#define PF_NS AF_NS 257#define PF_ISO AF_ISO 258#define PF_OSI AF_ISO 259#define PF_ECMA AF_ECMA 260#define PF_DATAKIT AF_DATAKIT 261#define PF_CCITT AF_CCITT 262#define PF_SNA AF_SNA 263#define PF_DECnet AF_DECnet 264#define PF_DLI AF_DLI 265#define PF_LAT AF_LAT 266#define PF_HYLINK AF_HYLINK 267#define PF_APPLETALK AF_APPLETALK 268#define PF_ROUTE AF_ROUTE 269#define PF_LINK AF_LINK 270#define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */ 271#define PF_COIP AF_COIP 272#define PF_CNT AF_CNT 273#define PF_IPX AF_IPX /* same format as AF_NS */ 274#define PF_INET6 AF_INET6 275#define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */ 276#define PF_PIP pseudo_AF_PIP 277#define PF_ISDN AF_ISDN 278#define PF_NATM AF_NATM 279#define PF_ENCAP AF_ENCAP 280#define PF_SIP AF_SIP 281#define PF_KEY AF_KEY 282#define PF_BPF pseudo_AF_HDRCMPLT 283#define PF_BLUETOOTH AF_BLUETOOTH 284#define PF_MPLS AF_MPLS 285#define PF_PFLOW pseudo_AF_PFLOW 286#define PF_PIPEX pseudo_AF_PIPEX 287#define PF_MAX AF_MAX 288 289/* 290 * These are the valid values for the "how" field used by shutdown(2). 291 */ 292#define SHUT_RD 0 293#define SHUT_WR 1 294#define SHUT_RDWR 2 295 296#if __BSD_VISIBLE 297#define SA_LEN(x) ((x)->sa_len) 298 299/* Read using getsockopt() with SOL_SOCKET, SO_PEERCRED */ 300struct sockpeercred { 301 uid_t uid; /* effective user id */ 302 gid_t gid; /* effective group id */ 303 pid_t pid; 304}; 305 306/* 307 * Definitions for network related sysctl, CTL_NET. 308 * 309 * Second level is protocol family. 310 * Third level is protocol number. 311 * 312 * Further levels are defined by the individual families below. 313 */ 314#define NET_MAXID AF_MAX 315 316#define CTL_NET_NAMES { \ 317 { 0, 0 }, \ 318 { "unix", CTLTYPE_NODE }, \ 319 { "inet", CTLTYPE_NODE }, \ 320 { "implink", CTLTYPE_NODE }, \ 321 { "pup", CTLTYPE_NODE }, \ 322 { "chaos", CTLTYPE_NODE }, \ 323 { "xerox_ns", CTLTYPE_NODE }, \ 324 { "iso", CTLTYPE_NODE }, \ 325 { "ecma", CTLTYPE_NODE }, \ 326 { "datakit", CTLTYPE_NODE }, \ 327 { "ccitt", CTLTYPE_NODE }, \ 328 { "ibm_sna", CTLTYPE_NODE }, \ 329 { "decnet", CTLTYPE_NODE }, \ 330 { "dec_dli", CTLTYPE_NODE }, \ 331 { "lat", CTLTYPE_NODE }, \ 332 { "hylink", CTLTYPE_NODE }, \ 333 { "appletalk", CTLTYPE_NODE }, \ 334 { "route", CTLTYPE_NODE }, \ 335 { "link", CTLTYPE_NODE }, \ 336 { "xtp", CTLTYPE_NODE }, \ 337 { "coip", CTLTYPE_NODE }, \ 338 { "cnt", CTLTYPE_NODE }, \ 339 { "rtip", CTLTYPE_NODE }, \ 340 { "ipx", CTLTYPE_NODE }, \ 341 { "inet6", CTLTYPE_NODE }, \ 342 { "pip", CTLTYPE_NODE }, \ 343 { "isdn", CTLTYPE_NODE }, \ 344 { "natm", CTLTYPE_NODE }, \ 345 { "encap", CTLTYPE_NODE }, \ 346 { "sip", CTLTYPE_NODE }, \ 347 { "key", CTLTYPE_NODE }, \ 348 { "bpf", CTLTYPE_NODE }, \ 349 { "bluetooth", CTLTYPE_NODE }, \ 350 { "mpls", CTLTYPE_NODE }, \ 351 { "pflow", CTLTYPE_NODE }, \ 352 { "pipex", CTLTYPE_NODE }, \ 353} 354 355/* 356 * PF_ROUTE - Routing table 357 * 358 * Four additional levels are defined: 359 * Fourth: address family, 0 is wildcard 360 * Fifth: type of info, defined below 361 * Sixth: flag(s) to mask with for NET_RT_FLAGS 362 * Seventh: routing table to use (facultative, defaults to 0) 363 * NET_RT_TABLE has the table id as sixth element. 364 */ 365#define NET_RT_DUMP 1 /* dump; may limit to a.f. */ 366#define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */ 367#define NET_RT_IFLIST 3 /* survey interface list */ 368#define NET_RT_STATS 4 /* routing table statistics */ 369#define NET_RT_TABLE 5 370#define NET_RT_IFNAMES 6 371#define NET_RT_SOURCE 7 372#define NET_RT_MAXID 8 373 374#define CTL_NET_RT_NAMES { \ 375 { 0, 0 }, \ 376 { "dump", CTLTYPE_STRUCT }, \ 377 { "flags", CTLTYPE_STRUCT }, \ 378 { "iflist", CTLTYPE_STRUCT }, \ 379 { "stats", CTLTYPE_STRUCT }, \ 380 { "table", CTLTYPE_STRUCT }, \ 381 { "ifnames", CTLTYPE_STRUCT }, \ 382 { "source", CTLTYPE_STRUCT }, \ 383} 384 385/* 386 * PF_UNIX - unix socket tunables 387 */ 388#define NET_UNIX_INFLIGHT 6 389#define NET_UNIX_DEFERRED 7 390#define NET_UNIX_MAXID 8 391 392#define CTL_NET_UNIX_NAMES { \ 393 { 0, 0 }, \ 394 { "stream", CTLTYPE_NODE }, \ 395 { "dgram", CTLTYPE_NODE }, \ 396 { 0, 0 }, \ 397 { 0, 0 }, \ 398 { "seqpacket", CTLTYPE_NODE }, \ 399 { "inflight", CTLTYPE_INT }, \ 400 { "deferred", CTLTYPE_INT }, \ 401} 402 403#define UNPCTL_RECVSPACE 1 404#define UNPCTL_SENDSPACE 2 405#define NET_UNIX_PROTO_MAXID 3 406 407#define CTL_NET_UNIX_PROTO_NAMES { \ 408 { 0, 0 }, \ 409 { "recvspace", CTLTYPE_INT }, \ 410 { "sendspace", CTLTYPE_INT }, \ 411} 412 413/* 414 * PF_LINK - link layer or device tunables 415 */ 416#define NET_LINK_IFRXQ 1 /* net.link.ifrxq */ 417#define NET_LINK_MAXID 2 418 419#define CTL_NET_LINK_NAMES { \ 420 { 0, 0 }, \ 421 { "ifrxq", CTLTYPE_NODE }, \ 422} 423 424#define NET_LINK_IFRXQ_PRESSURE_RETURN \ 425 1 /* net.link.ifrxq.pressure_return */ 426#define NET_LINK_IFRXQ_PRESSURE_DROP \ 427 2 /* net.link.ifrxq.pressure_drop */ 428#define NET_LINK_IFRXQ_MAXID 3 429 430#define CTL_NET_LINK_IFRXQ_NAMES { \ 431 { 0, 0 }, \ 432 { "pressure_return", CTLTYPE_INT }, \ 433 { "pressure_drop", CTLTYPE_INT }, \ 434} 435 436/* 437 * PF_KEY - Key Management 438 */ 439#define NET_KEY_SADB_DUMP 1 /* return SADB */ 440#define NET_KEY_SPD_DUMP 2 /* return SPD */ 441#define NET_KEY_MAXID 3 442 443#define CTL_NET_KEY_NAMES { \ 444 { 0, 0 }, \ 445 { "sadb_dump", CTLTYPE_STRUCT }, \ 446 { "spd_dump", CTLTYPE_STRUCT }, \ 447} 448 449/* 450 * PF_BPF not really a family, but connected under CTL_NET 451 */ 452#define NET_BPF_BUFSIZE 1 /* default buffer size */ 453#define NET_BPF_MAXBUFSIZE 2 /* maximum buffer size */ 454#define NET_BPF_MAXID 3 455 456#define CTL_NET_BPF_NAMES { \ 457 { 0, 0 }, \ 458 { "bufsize", CTLTYPE_INT }, \ 459 { "maxbufsize", CTLTYPE_INT }, \ 460} 461 462/* 463 * PF_PFLOW not really a family, but connected under CTL_NET 464 */ 465#define NET_PFLOW_STATS 1 /* statistics */ 466#define NET_PFLOW_MAXID 2 467 468#define CTL_NET_PFLOW_NAMES { \ 469 { 0, 0 }, \ 470 { "stats", CTLTYPE_STRUCT }, \ 471} 472#endif /* __BSD_VISIBLE */ 473 474/* 475 * Maximum queue length specifiable by listen(2). 476 */ 477#define SOMAXCONN 128 478 479/* 480 * Message header for recvmsg and sendmsg calls. 481 * Used value-result for recvmsg, value only for sendmsg. 482 */ 483struct msghdr { 484 void *msg_name; /* optional address */ 485 socklen_t msg_namelen; /* size of address */ 486 struct iovec *msg_iov; /* scatter/gather array */ 487 unsigned int msg_iovlen; /* # elements in msg_iov */ 488 void *msg_control; /* ancillary data, see below */ 489 socklen_t msg_controllen; /* ancillary data buffer len */ 490 int msg_flags; /* flags on received message */ 491}; 492 493struct mmsghdr { 494 struct msghdr msg_hdr; 495 unsigned int msg_len; 496}; 497 498struct timespec; 499 500#define MSG_OOB 0x1 /* process out-of-band data */ 501#define MSG_PEEK 0x2 /* peek at incoming message */ 502#define MSG_DONTROUTE 0x4 /* send without using routing tables */ 503#define MSG_EOR 0x8 /* data completes record */ 504#define MSG_TRUNC 0x10 /* data discarded before delivery */ 505#define MSG_CTRUNC 0x20 /* control data lost before delivery */ 506#define MSG_WAITALL 0x40 /* wait for full request or error */ 507#define MSG_DONTWAIT 0x80 /* this message should be nonblocking */ 508#define MSG_BCAST 0x100 /* this message rec'd as broadcast */ 509#define MSG_MCAST 0x200 /* this message rec'd as multicast */ 510#define MSG_NOSIGNAL 0x400 /* do not send SIGPIPE */ 511#define MSG_CMSG_CLOEXEC 0x800 /* set FD_CLOEXEC on received fds */ 512#define MSG_WAITFORONE 0x1000 /* nonblocking but wait for one msg */ 513 514/* 515 * Header for ancillary data objects in msg_control buffer. 516 * Used for additional information with/about a datagram 517 * not expressible by flags. The format is a sequence 518 * of message elements headed by cmsghdr structures. 519 */ 520struct cmsghdr { 521 socklen_t cmsg_len; /* data byte count, including hdr */ 522 int cmsg_level; /* originating protocol */ 523 int cmsg_type; /* protocol-specific type */ 524/* followed by u_char cmsg_data[]; */ 525}; 526 527/* given pointer to struct cmsghdr, return pointer to data */ 528#define CMSG_DATA(cmsg) \ 529 ((unsigned char *)(cmsg) + _ALIGN(sizeof(struct cmsghdr))) 530 531/* given pointer to struct cmsghdr, return pointer to next cmsghdr */ 532#define CMSG_NXTHDR(mhdr, cmsg) \ 533 (((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \ 534 _ALIGN(sizeof(struct cmsghdr)) > \ 535 ((char *)(mhdr)->msg_control) + (mhdr)->msg_controllen) ? \ 536 (struct cmsghdr *)NULL : \ 537 (struct cmsghdr *)((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len))) 538 539/* 540 * RFC 2292 requires to check msg_controllen, in case that the kernel returns 541 * an empty list for some reasons. 542 */ 543#define CMSG_FIRSTHDR(mhdr) \ 544 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \ 545 (struct cmsghdr *)(mhdr)->msg_control : \ 546 (struct cmsghdr *)NULL) 547 548/* Round len up to next alignment boundary */ 549#ifdef _KERNEL 550#define CMSG_ALIGN(n) _ALIGN(n) 551#endif 552 553/* Length of the contents of a control message of length len */ 554#define CMSG_LEN(len) (_ALIGN(sizeof(struct cmsghdr)) + (len)) 555 556/* Length of the space taken up by a padded control message of length len */ 557#define CMSG_SPACE(len) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(len)) 558 559/* "Socket"-level control message types: */ 560#define SCM_RIGHTS 0x01 /* access rights (array of int) */ 561#define SCM_TIMESTAMP 0x04 /* timestamp (struct timeval) */ 562 563#ifndef _KERNEL 564 565__BEGIN_DECLS 566int accept(int, struct sockaddr *, socklen_t *); 567int bind(int, const struct sockaddr *, socklen_t); 568int connect(int, const struct sockaddr *, socklen_t); 569int getpeername(int, struct sockaddr *, socklen_t *); 570int getsockname(int, struct sockaddr *, socklen_t *); 571int getsockopt(int, int, int, void *, socklen_t *); 572int listen(int, int); 573ssize_t recv(int, void *, size_t, int); 574ssize_t recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *); 575ssize_t recvmsg(int, struct msghdr *, int); 576int recvmmsg(int, struct mmsghdr *, unsigned int, int, struct timespec *); 577ssize_t send(int, const void *, size_t, int); 578ssize_t sendto(int, const void *, 579 size_t, int, const struct sockaddr *, socklen_t); 580ssize_t sendmsg(int, const struct msghdr *, int); 581int sendmmsg(int, struct mmsghdr *, unsigned int, int); 582int setsockopt(int, int, int, const void *, socklen_t); 583int shutdown(int, int); 584int sockatmark(int); 585int socket(int, int, int); 586int socketpair(int, int, int, int *); 587 588#if __BSD_VISIBLE 589int accept4(int, struct sockaddr *__restrict, socklen_t *__restrict, int); 590#endif 591 592#if __BSD_VISIBLE 593int getpeereid(int, uid_t *, gid_t *); 594int getrtable(void); 595int setrtable(int); 596#endif /* __BSD_VISIBLE */ 597 598__END_DECLS 599 600#else 601 602static inline struct sockaddr * 603sstosa(struct sockaddr_storage *ss) 604{ 605 return ((struct sockaddr *)(ss)); 606} 607 608#endif /* !_KERNEL */ 609 610#endif /* !_SYS_SOCKET_H_ */ 611