socket.h revision 127976
1/* 2 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)socket.h 8.4 (Berkeley) 2/21/94 30 * $FreeBSD: head/sys/sys/socket.h 127976 2004-04-07 04:19:52Z imp $ 31 */ 32 33#ifndef _SYS_SOCKET_H_ 34#define _SYS_SOCKET_H_ 35 36#include <sys/cdefs.h> 37#include <sys/_types.h> 38#include <sys/_iovec.h> 39#define _NO_NAMESPACE_POLLUTION 40#include <machine/param.h> 41#undef _NO_NAMESPACE_POLLUTION 42 43/* 44 * Definitions related to sockets: types, address families, options. 45 */ 46 47/* 48 * Data types. 49 */ 50#if __BSD_VISIBLE 51#ifndef _GID_T_DECLARED 52typedef __gid_t gid_t; 53#define _GID_T_DECLARED 54#endif 55 56#ifndef _OFF_T_DECLARED 57typedef __off_t off_t; 58#define _OFF_T_DECLARED 59#endif 60 61#ifndef _PID_T_DECLARED 62typedef __pid_t pid_t; 63#define _PID_T_DECLARED 64#endif 65#endif 66 67#ifndef _SA_FAMILY_T_DECLARED 68typedef __sa_family_t sa_family_t; 69#define _SA_FAMILY_T_DECLARED 70#endif 71 72#ifndef _SOCKLEN_T_DECLARED 73typedef __socklen_t socklen_t; 74#define _SOCKLEN_T_DECLARED 75#endif 76 77#ifndef _SSIZE_T_DECLARED 78typedef __ssize_t ssize_t; 79#define _SSIZE_T_DECLARED 80#endif 81 82#if __BSD_VISIBLE 83#ifndef _UID_T_DECLARED 84typedef __uid_t uid_t; 85#define _UID_T_DECLARED 86#endif 87#endif 88 89/* 90 * Types 91 */ 92#define SOCK_STREAM 1 /* stream socket */ 93#define SOCK_DGRAM 2 /* datagram socket */ 94#define SOCK_RAW 3 /* raw-protocol interface */ 95#if __BSD_VISIBLE 96#define SOCK_RDM 4 /* reliably-delivered message */ 97#endif 98#define SOCK_SEQPACKET 5 /* sequenced packet stream */ 99 100/* 101 * Option flags per-socket. 102 */ 103#define SO_DEBUG 0x0001 /* turn on debugging info recording */ 104#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ 105#define SO_REUSEADDR 0x0004 /* allow local address reuse */ 106#define SO_KEEPALIVE 0x0008 /* keep connections alive */ 107#define SO_DONTROUTE 0x0010 /* just use interface addresses */ 108#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ 109#if __BSD_VISIBLE 110#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ 111#endif 112#define SO_LINGER 0x0080 /* linger on close if data present */ 113#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ 114#if __BSD_VISIBLE 115#define SO_REUSEPORT 0x0200 /* allow local address & port reuse */ 116#define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */ 117#define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */ 118#define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */ 119#define SO_BINTIME 0x2000 /* timestamp received dgram traffic */ 120#endif 121 122/* 123 * Additional options, not kept in so_options. 124 */ 125#define SO_SNDBUF 0x1001 /* send buffer size */ 126#define SO_RCVBUF 0x1002 /* receive buffer size */ 127#define SO_SNDLOWAT 0x1003 /* send low-water mark */ 128#define SO_RCVLOWAT 0x1004 /* receive low-water mark */ 129#define SO_SNDTIMEO 0x1005 /* send timeout */ 130#define SO_RCVTIMEO 0x1006 /* receive timeout */ 131#define SO_ERROR 0x1007 /* get error status and clear */ 132#define SO_TYPE 0x1008 /* get socket type */ 133#if __BSD_VISIBLE 134#define SO_LABEL 0x1009 /* socket's MAC label */ 135#define SO_PEERLABEL 0x1010 /* socket's peer's MAC label */ 136#endif 137 138/* 139 * Structure used for manipulating linger option. 140 */ 141struct linger { 142 int l_onoff; /* option on/off */ 143 int l_linger; /* linger time */ 144}; 145 146#if __BSD_VISIBLE 147struct accept_filter_arg { 148 char af_name[16]; 149 char af_arg[256-16]; 150}; 151#endif 152 153/* 154 * Level number for (get/set)sockopt() to apply to socket itself. 155 */ 156#define SOL_SOCKET 0xffff /* options for socket level */ 157 158/* 159 * Address families. 160 */ 161#define AF_UNSPEC 0 /* unspecified */ 162#if __BSD_VISIBLE 163#define AF_LOCAL AF_UNIX /* local to host (pipes, portals) */ 164#endif 165#define AF_UNIX 1 /* standardized name for AF_LOCAL */ 166#define AF_INET 2 /* internetwork: UDP, TCP, etc. */ 167#if __BSD_VISIBLE 168#define AF_IMPLINK 3 /* arpanet imp addresses */ 169#define AF_PUP 4 /* pup protocols: e.g. BSP */ 170#define AF_CHAOS 5 /* mit CHAOS protocols */ 171#define AF_NETBIOS 6 /* SMB protocols */ 172#define AF_ISO 7 /* ISO protocols */ 173#define AF_OSI AF_ISO 174#define AF_ECMA 8 /* European computer manufacturers */ 175#define AF_DATAKIT 9 /* datakit protocols */ 176#define AF_CCITT 10 /* CCITT protocols, X.25 etc */ 177#define AF_SNA 11 /* IBM SNA */ 178#define AF_DECnet 12 /* DECnet */ 179#define AF_DLI 13 /* DEC Direct data link interface */ 180#define AF_LAT 14 /* LAT */ 181#define AF_HYLINK 15 /* NSC Hyperchannel */ 182#define AF_APPLETALK 16 /* Apple Talk */ 183#define AF_ROUTE 17 /* Internal Routing Protocol */ 184#define AF_LINK 18 /* Link layer interface */ 185#define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */ 186#define AF_COIP 20 /* connection-oriented IP, aka ST II */ 187#define AF_CNT 21 /* Computer Network Technology */ 188#define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */ 189#define AF_IPX 23 /* Novell Internet Protocol */ 190#define AF_SIP 24 /* Simple Internet Protocol */ 191#define pseudo_AF_PIP 25 /* Help Identify PIP packets */ 192#define AF_ISDN 26 /* Integrated Services Digital Network*/ 193#define AF_E164 AF_ISDN /* CCITT E.164 recommendation */ 194#define pseudo_AF_KEY 27 /* Internal key-management function */ 195#endif 196#define AF_INET6 28 /* IPv6 */ 197#if __BSD_VISIBLE 198#define AF_NATM 29 /* native ATM access */ 199#define AF_ATM 30 /* ATM */ 200#define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers 201 * in interface output routine 202 */ 203#define AF_NETGRAPH 32 /* Netgraph sockets */ 204#define AF_SLOW 33 /* 802.3ad slow protocol */ 205#define AF_SCLUSTER 34 /* Sitara cluster protocol */ 206#define AF_ARP 35 207#define AF_MAX 36 208#endif 209 210/* 211 * Structure used by kernel to store most 212 * addresses. 213 */ 214struct sockaddr { 215 unsigned char sa_len; /* total length */ 216 sa_family_t sa_family; /* address family */ 217 char sa_data[14]; /* actually longer; address value */ 218}; 219#if __BSD_VISIBLE 220#define SOCK_MAXADDRLEN 255 /* longest possible addresses */ 221 222/* 223 * Structure used by kernel to pass protocol 224 * information in raw sockets. 225 */ 226struct sockproto { 227 unsigned short sp_family; /* address family */ 228 unsigned short sp_protocol; /* protocol */ 229}; 230#endif 231 232/* 233 * RFC 2553: protocol-independent placeholder for socket addresses 234 */ 235#define _SS_MAXSIZE 128U 236#define _SS_ALIGNSIZE (sizeof(__int64_t)) 237#define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(unsigned char) - \ 238 sizeof(sa_family_t)) 239#define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(unsigned char) - \ 240 sizeof(sa_family_t) - _SS_PAD1SIZE - _SS_ALIGNSIZE) 241 242struct sockaddr_storage { 243 unsigned char ss_len; /* address length */ 244 sa_family_t ss_family; /* address family */ 245 char __ss_pad1[_SS_PAD1SIZE]; 246 __int64_t __ss_align; /* force desired struct alignment */ 247 char __ss_pad2[_SS_PAD2SIZE]; 248}; 249 250#if __BSD_VISIBLE 251/* 252 * Protocol families, same as address families for now. 253 */ 254#define PF_UNSPEC AF_UNSPEC 255#define PF_LOCAL AF_LOCAL 256#define PF_UNIX PF_LOCAL /* backward compatibility */ 257#define PF_INET AF_INET 258#define PF_IMPLINK AF_IMPLINK 259#define PF_PUP AF_PUP 260#define PF_CHAOS AF_CHAOS 261#define PF_NETBIOS AF_NETBIOS 262#define PF_ISO AF_ISO 263#define PF_OSI AF_ISO 264#define PF_ECMA AF_ECMA 265#define PF_DATAKIT AF_DATAKIT 266#define PF_CCITT AF_CCITT 267#define PF_SNA AF_SNA 268#define PF_DECnet AF_DECnet 269#define PF_DLI AF_DLI 270#define PF_LAT AF_LAT 271#define PF_HYLINK AF_HYLINK 272#define PF_APPLETALK AF_APPLETALK 273#define PF_ROUTE AF_ROUTE 274#define PF_LINK AF_LINK 275#define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */ 276#define PF_COIP AF_COIP 277#define PF_CNT AF_CNT 278#define PF_SIP AF_SIP 279#define PF_IPX AF_IPX 280#define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */ 281#define PF_PIP pseudo_AF_PIP 282#define PF_ISDN AF_ISDN 283#define PF_KEY pseudo_AF_KEY 284#define PF_INET6 AF_INET6 285#define PF_NATM AF_NATM 286#define PF_ATM AF_ATM 287#define PF_NETGRAPH AF_NETGRAPH 288#define PF_SLOW AF_SLOW 289#define PF_SCLUSTER AF_SCLUSTER 290#define PF_ARP AF_ARP 291 292#define PF_MAX AF_MAX 293 294/* 295 * Definitions for network related sysctl, CTL_NET. 296 * 297 * Second level is protocol family. 298 * Third level is protocol number. 299 * 300 * Further levels are defined by the individual families below. 301 */ 302#define NET_MAXID AF_MAX 303 304#define CTL_NET_NAMES { \ 305 { 0, 0 }, \ 306 { "unix", CTLTYPE_NODE }, \ 307 { "inet", CTLTYPE_NODE }, \ 308 { "implink", CTLTYPE_NODE }, \ 309 { "pup", CTLTYPE_NODE }, \ 310 { "chaos", CTLTYPE_NODE }, \ 311 { "xerox_ns", CTLTYPE_NODE }, \ 312 { "iso", CTLTYPE_NODE }, \ 313 { "emca", CTLTYPE_NODE }, \ 314 { "datakit", CTLTYPE_NODE }, \ 315 { "ccitt", CTLTYPE_NODE }, \ 316 { "ibm_sna", CTLTYPE_NODE }, \ 317 { "decnet", CTLTYPE_NODE }, \ 318 { "dec_dli", CTLTYPE_NODE }, \ 319 { "lat", CTLTYPE_NODE }, \ 320 { "hylink", CTLTYPE_NODE }, \ 321 { "appletalk", CTLTYPE_NODE }, \ 322 { "route", CTLTYPE_NODE }, \ 323 { "link_layer", CTLTYPE_NODE }, \ 324 { "xtp", CTLTYPE_NODE }, \ 325 { "coip", CTLTYPE_NODE }, \ 326 { "cnt", CTLTYPE_NODE }, \ 327 { "rtip", CTLTYPE_NODE }, \ 328 { "ipx", CTLTYPE_NODE }, \ 329 { "sip", CTLTYPE_NODE }, \ 330 { "pip", CTLTYPE_NODE }, \ 331 { "isdn", CTLTYPE_NODE }, \ 332 { "key", CTLTYPE_NODE }, \ 333 { "inet6", CTLTYPE_NODE }, \ 334 { "natm", CTLTYPE_NODE }, \ 335 { "atm", CTLTYPE_NODE }, \ 336 { "hdrcomplete", CTLTYPE_NODE }, \ 337 { "netgraph", CTLTYPE_NODE }, \ 338 { "snp", CTLTYPE_NODE }, \ 339 { "scp", CTLTYPE_NODE }, \ 340} 341 342/* 343 * PF_ROUTE - Routing table 344 * 345 * Three additional levels are defined: 346 * Fourth: address family, 0 is wildcard 347 * Fifth: type of info, defined below 348 * Sixth: flag(s) to mask with for NET_RT_FLAGS 349 */ 350#define NET_RT_DUMP 1 /* dump; may limit to a.f. */ 351#define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */ 352#define NET_RT_IFLIST 3 /* survey interface list */ 353#define NET_RT_IFMALIST 4 /* return multicast address list */ 354#define NET_RT_MAXID 5 355 356#define CTL_NET_RT_NAMES { \ 357 { 0, 0 }, \ 358 { "dump", CTLTYPE_STRUCT }, \ 359 { "flags", CTLTYPE_STRUCT }, \ 360 { "iflist", CTLTYPE_STRUCT }, \ 361 { "ifmalist", CTLTYPE_STRUCT }, \ 362} 363#endif /* __BSD_VISIBLE */ 364 365/* 366 * Maximum queue length specifiable by listen. 367 */ 368#define SOMAXCONN 128 369 370/* 371 * Message header for recvmsg and sendmsg calls. 372 * Used value-result for recvmsg, value only for sendmsg. 373 */ 374struct msghdr { 375 void *msg_name; /* optional address */ 376 socklen_t msg_namelen; /* size of address */ 377 struct iovec *msg_iov; /* scatter/gather array */ 378 int msg_iovlen; /* # elements in msg_iov */ 379 void *msg_control; /* ancillary data, see below */ 380 socklen_t msg_controllen; /* ancillary data buffer len */ 381 int msg_flags; /* flags on received message */ 382}; 383 384#define MSG_OOB 0x1 /* process out-of-band data */ 385#define MSG_PEEK 0x2 /* peek at incoming message */ 386#define MSG_DONTROUTE 0x4 /* send without using routing tables */ 387#define MSG_EOR 0x8 /* data completes record */ 388#define MSG_TRUNC 0x10 /* data discarded before delivery */ 389#define MSG_CTRUNC 0x20 /* control data lost before delivery */ 390#define MSG_WAITALL 0x40 /* wait for full request or error */ 391#if __BSD_VISIBLE 392#define MSG_DONTWAIT 0x80 /* this message should be nonblocking */ 393#define MSG_EOF 0x100 /* data completes connection */ 394#define MSG_COMPAT 0x8000 /* used in sendit() */ 395#endif 396 397/* 398 * Header for ancillary data objects in msg_control buffer. 399 * Used for additional information with/about a datagram 400 * not expressible by flags. The format is a sequence 401 * of message elements headed by cmsghdr structures. 402 */ 403struct cmsghdr { 404 socklen_t cmsg_len; /* data byte count, including hdr */ 405 int cmsg_level; /* originating protocol */ 406 int cmsg_type; /* protocol-specific type */ 407/* followed by u_char cmsg_data[]; */ 408}; 409 410#if __BSD_VISIBLE 411/* 412 * While we may have more groups than this, the cmsgcred struct must 413 * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow 414 * this. 415*/ 416#define CMGROUP_MAX 16 417 418/* 419 * Credentials structure, used to verify the identity of a peer 420 * process that has sent us a message. This is allocated by the 421 * peer process but filled in by the kernel. This prevents the 422 * peer from lying about its identity. (Note that cmcred_groups[0] 423 * is the effective GID.) 424 */ 425struct cmsgcred { 426 pid_t cmcred_pid; /* PID of sending process */ 427 uid_t cmcred_uid; /* real UID of sending process */ 428 uid_t cmcred_euid; /* effective UID of sending process */ 429 gid_t cmcred_gid; /* real GID of sending process */ 430 short cmcred_ngroups; /* number or groups */ 431 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */ 432}; 433#endif /* __BSD_VISIBLE */ 434 435/* given pointer to struct cmsghdr, return pointer to data */ 436#define CMSG_DATA(cmsg) ((unsigned char *)(cmsg) + \ 437 _ALIGN(sizeof(struct cmsghdr))) 438 439/* given pointer to struct cmsghdr, return pointer to next cmsghdr */ 440#define CMSG_NXTHDR(mhdr, cmsg) \ 441 (((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \ 442 _ALIGN(sizeof(struct cmsghdr)) > \ 443 (char *)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \ 444 (struct cmsghdr *)NULL : \ 445 (struct cmsghdr *)((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len))) 446 447#define CMSG_FIRSTHDR(mhdr) ((struct cmsghdr *)(mhdr)->msg_control) 448 449#if __BSD_VISIBLE 450/* RFC 2292 additions */ 451#define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l)) 452#define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l)) 453#endif 454 455#ifdef _KERNEL 456#define CMSG_ALIGN(n) _ALIGN(n) 457#endif 458 459/* "Socket"-level control message types: */ 460#define SCM_RIGHTS 0x01 /* access rights (array of int) */ 461#if __BSD_VISIBLE 462#define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */ 463#define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */ 464#define SCM_BINTIME 0x04 /* timestamp (struct bintime) */ 465#endif 466 467#if __BSD_VISIBLE 468/* 469 * 4.3 compat sockaddr, move to compat file later 470 */ 471struct osockaddr { 472 unsigned short sa_family; /* address family */ 473 char sa_data[14]; /* up to 14 bytes of direct address */ 474}; 475 476/* 477 * 4.3-compat message header (move to compat file later). 478 */ 479struct omsghdr { 480 char *msg_name; /* optional address */ 481 int msg_namelen; /* size of address */ 482 struct iovec *msg_iov; /* scatter/gather array */ 483 int msg_iovlen; /* # elements in msg_iov */ 484 char *msg_accrights; /* access rights sent/received */ 485 int msg_accrightslen; 486}; 487#endif 488 489/* 490 * howto arguments for shutdown(2), specified by Posix.1g. 491 */ 492#define SHUT_RD 0 /* shut down the reading side */ 493#define SHUT_WR 1 /* shut down the writing side */ 494#define SHUT_RDWR 2 /* shut down both sides */ 495 496#if __BSD_VISIBLE 497/* 498 * sendfile(2) header/trailer struct 499 */ 500struct sf_hdtr { 501 struct iovec *headers; /* pointer to an array of header struct iovec's */ 502 int hdr_cnt; /* number of header iovec's */ 503 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */ 504 int trl_cnt; /* number of trailer iovec's */ 505}; 506 507/* 508 * Sendfile-specific flag(s) 509 */ 510#define SF_NODISKIO 0x00000001 511#endif 512 513#ifndef _KERNEL 514 515#include <sys/cdefs.h> 516 517__BEGIN_DECLS 518int accept(int, struct sockaddr * __restrict, socklen_t * __restrict); 519int bind(int, const struct sockaddr *, socklen_t); 520int connect(int, const struct sockaddr *, socklen_t); 521int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict); 522int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict); 523int getsockopt(int, int, int, void * __restrict, socklen_t * __restrict); 524int listen(int, int); 525ssize_t recv(int, void *, size_t, int); 526ssize_t recvfrom(int, void *, size_t, int, struct sockaddr * __restrict, socklen_t * __restrict); 527ssize_t recvmsg(int, struct msghdr *, int); 528ssize_t send(int, const void *, size_t, int); 529ssize_t sendto(int, const void *, 530 size_t, int, const struct sockaddr *, socklen_t); 531ssize_t sendmsg(int, const struct msghdr *, int); 532#if __BSD_VISIBLE 533int sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int); 534#endif 535int setsockopt(int, int, int, const void *, socklen_t); 536int shutdown(int, int); 537int sockatmark(int); 538int socket(int, int, int); 539int socketpair(int, int, int, int *); 540__END_DECLS 541 542#endif /* !_KERNEL */ 543 544#endif /* !_SYS_SOCKET_H_ */ 545