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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)socket.h 8.4 (Berkeley) 2/21/94 34 * $FreeBSD: src/sys/sys/socket.h,v 1.39.2.7 2001/07/03 11:02:01 ume Exp $ 35 * $DragonFly: src/sys/sys/socket.h,v 1.19 2007/02/27 12:05:26 swildner Exp $ 36 */ 37 38 #ifndef _SYS_SOCKET_H_ 39 #define _SYS_SOCKET_H_ 40 41 #ifndef _SYS_TYPES_H_ 42 #include <sys/types.h> 43 #endif 44 #ifndef _MACHINE_STDINT_H_ 45 #include <machine/stdint.h> 46 #endif 47 48 #define _NO_NAMESPACE_POLLUTION 49 #include <machine/param.h> 50 #undef _NO_NAMESPACE_POLLUTION 51 52 /* 53 * Definitions related to sockets: types, address families, options. 54 */ 55 56 /* 57 * Data types. 58 */ 59 typedef __uint8_t sa_family_t; 60 61 #ifndef _SOCKLEN_T_DECLARED 62 #define _SOCKLEN_T_DECLARED 63 typedef __socklen_t socklen_t; 64 #endif 65 66 67 /* 68 * Types 69 */ 70 #define SOCK_STREAM 1 /* stream socket */ 71 #define SOCK_DGRAM 2 /* datagram socket */ 72 #define SOCK_RAW 3 /* raw-protocol interface */ 73 #define SOCK_RDM 4 /* reliably-delivered message */ 74 #define SOCK_SEQPACKET 5 /* sequenced packet stream */ 75 76 /* 77 * Option flags per-socket. 78 */ 79 #define SO_DEBUG 0x0001 /* turn on debugging info recording */ 80 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ 81 #define SO_REUSEADDR 0x0004 /* allow local address reuse */ 82 #define SO_KEEPALIVE 0x0008 /* keep connections alive */ 83 #define SO_DONTROUTE 0x0010 /* just use interface addresses */ 84 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ 85 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ 86 #define SO_LINGER 0x0080 /* linger on close if data present */ 87 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ 88 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */ 89 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */ 90 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */ 91 92 /* 93 * Additional options, not kept in so_options. 94 */ 95 #define SO_SNDBUF 0x1001 /* send buffer size */ 96 #define SO_RCVBUF 0x1002 /* receive buffer size */ 97 #define SO_SNDLOWAT 0x1003 /* send low-water mark */ 98 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */ 99 #define SO_SNDTIMEO 0x1005 /* send timeout */ 100 #define SO_RCVTIMEO 0x1006 /* receive timeout */ 101 #define SO_ERROR 0x1007 /* get error status and clear */ 102 #define SO_TYPE 0x1008 /* get socket type */ 103 /*efine SO_PRIVSTATE 0x1009 get/deny privileged state */ 104 105 /* 106 * Structure used for manipulating linger option. 107 */ 108 struct linger { 109 int l_onoff; /* option on/off */ 110 int l_linger; /* linger time */ 111 }; 112 113 struct accept_filter_arg { 114 char af_name[16]; 115 char af_arg[256-16]; 116 }; 117 118 /* 119 * Level number for (get/set)sockopt() to apply to socket itself. 120 */ 121 #define SOL_SOCKET 0xffff /* options for socket level */ 122 123 /* 124 * Address families. 125 */ 126 #define AF_UNSPEC 0 /* unspecified */ 127 #define AF_LOCAL 1 /* local to host (pipes, portals) */ 128 #define AF_UNIX AF_LOCAL /* backward compatibility */ 129 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */ 130 #define AF_IMPLINK 3 /* arpanet imp addresses */ 131 #define AF_PUP 4 /* pup protocols: e.g. BSP */ 132 #define AF_CHAOS 5 /* mit CHAOS protocols */ 133 #define AF_NS 6 /* XEROX NS protocols */ 134 #define AF_ISO 7 /* ISO protocols */ 135 #define AF_OSI AF_ISO 136 #define AF_ECMA 8 /* European computer manufacturers */ 137 #define AF_DATAKIT 9 /* datakit protocols */ 138 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */ 139 #define AF_SNA 11 /* IBM SNA */ 140 #define AF_DECnet 12 /* DECnet */ 141 #define AF_DLI 13 /* DEC Direct data link interface */ 142 #define AF_LAT 14 /* LAT */ 143 #define AF_HYLINK 15 /* NSC Hyperchannel */ 144 #define AF_APPLETALK 16 /* Apple Talk */ 145 #define AF_ROUTE 17 /* Internal Routing Protocol */ 146 #define AF_LINK 18 /* Link layer interface */ 147 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */ 148 #define AF_COIP 20 /* connection-oriented IP, aka ST II */ 149 #define AF_CNT 21 /* Computer Network Technology */ 150 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */ 151 #define AF_IPX 23 /* Novell Internet Protocol */ 152 #define AF_SIP 24 /* Simple Internet Protocol */ 153 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */ 154 #define AF_ISDN 26 /* Integrated Services Digital Network*/ 155 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */ 156 #define pseudo_AF_KEY 27 /* Internal key-management function */ 157 #define AF_INET6 28 /* IPv6 */ 158 #define AF_NATM 29 /* native ATM access */ 159 #define AF_ATM 30 /* ATM */ 160 #define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers 161 * in interface output routine 162 */ 163 #define AF_NETGRAPH 32 /* Netgraph sockets */ 164 165 #define AF_MAX 33 166 167 /* 168 * Structure used by kernel to store most 169 * addresses. 170 */ 171 struct sockaddr { 172 __uint8_t sa_len; /* total length */ 173 sa_family_t sa_family; /* address family */ 174 char sa_data[14]; /* actually longer; address value */ 175 }; 176 #define SOCK_MAXADDRLEN 255 /* longest possible addresses */ 177 178 #ifdef _KERNEL 179 180 #ifndef _SYS_LIBKERN_H_ 181 #include <sys/libkern.h> /* for bcmp() */ 182 #endif 183 184 static __inline boolean_t 185 sa_equal(const struct sockaddr *a1, const struct sockaddr *a2) 186 { 187 return (bcmp(a1, a2, a1->sa_len) == 0); 188 } 189 #endif 190 191 /* 192 * Structure used by kernel to pass protocol 193 * information in raw sockets. 194 */ 195 struct sockproto { 196 __uint16_t sp_family; /* address family */ 197 __uint16_t sp_protocol; /* protocol */ 198 }; 199 200 /* 201 * RFC 2553: protocol-independent placeholder for socket addresses 202 */ 203 #define _SS_MAXSIZE 128 204 #define _SS_ALIGNSIZE (sizeof(int64_t)) 205 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(unsigned char) - sizeof(sa_family_t)) 206 #define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(unsigned char) - sizeof(sa_family_t) - \ 207 _SS_PAD1SIZE - _SS_ALIGNSIZE) 208 209 struct sockaddr_storage { 210 __uint8_t ss_len; /* address length */ 211 sa_family_t ss_family; /* address family */ 212 char __ss_pad1[_SS_PAD1SIZE]; 213 __int64_t __ss_align; /* force desired structure storage alignment */ 214 char __ss_pad2[_SS_PAD2SIZE]; 215 }; 216 217 /* 218 * Protocol families, same as address families for now. 219 */ 220 #define PF_UNSPEC AF_UNSPEC 221 #define PF_LOCAL AF_LOCAL 222 #define PF_UNIX PF_LOCAL /* backward compatibility */ 223 #define PF_INET AF_INET 224 #define PF_IMPLINK AF_IMPLINK 225 #define PF_PUP AF_PUP 226 #define PF_CHAOS AF_CHAOS 227 #define PF_NS AF_NS 228 #define PF_ISO AF_ISO 229 #define PF_OSI AF_ISO 230 #define PF_ECMA AF_ECMA 231 #define PF_DATAKIT AF_DATAKIT 232 #define PF_CCITT AF_CCITT 233 #define PF_SNA AF_SNA 234 #define PF_DECnet AF_DECnet 235 #define PF_DLI AF_DLI 236 #define PF_LAT AF_LAT 237 #define PF_HYLINK AF_HYLINK 238 #define PF_APPLETALK AF_APPLETALK 239 #define PF_ROUTE AF_ROUTE 240 #define PF_LINK AF_LINK 241 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */ 242 #define PF_COIP AF_COIP 243 #define PF_CNT AF_CNT 244 #define PF_SIP AF_SIP 245 #define PF_IPX AF_IPX /* same format as AF_NS */ 246 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */ 247 #define PF_PIP pseudo_AF_PIP 248 #define PF_ISDN AF_ISDN 249 #define PF_KEY pseudo_AF_KEY 250 #define PF_INET6 AF_INET6 251 #define PF_NATM AF_NATM 252 #define PF_ATM AF_ATM 253 #define PF_NETGRAPH AF_NETGRAPH 254 255 #define PF_MAX AF_MAX 256 257 /* 258 * Definitions for network related sysctl, CTL_NET. 259 * 260 * Second level is protocol family. 261 * Third level is protocol number. 262 * 263 * Further levels are defined by the individual families below. 264 */ 265 #define NET_MAXID AF_MAX 266 267 #define CTL_NET_NAMES { \ 268 { 0, 0 }, \ 269 { "unix", CTLTYPE_NODE }, \ 270 { "inet", CTLTYPE_NODE }, \ 271 { "implink", CTLTYPE_NODE }, \ 272 { "pup", CTLTYPE_NODE }, \ 273 { "chaos", CTLTYPE_NODE }, \ 274 { "xerox_ns", CTLTYPE_NODE }, \ 275 { "iso", CTLTYPE_NODE }, \ 276 { "emca", CTLTYPE_NODE }, \ 277 { "datakit", CTLTYPE_NODE }, \ 278 { "ccitt", CTLTYPE_NODE }, \ 279 { "ibm_sna", CTLTYPE_NODE }, \ 280 { "decnet", CTLTYPE_NODE }, \ 281 { "dec_dli", CTLTYPE_NODE }, \ 282 { "lat", CTLTYPE_NODE }, \ 283 { "hylink", CTLTYPE_NODE }, \ 284 { "appletalk", CTLTYPE_NODE }, \ 285 { "route", CTLTYPE_NODE }, \ 286 { "link_layer", CTLTYPE_NODE }, \ 287 { "xtp", CTLTYPE_NODE }, \ 288 { "coip", CTLTYPE_NODE }, \ 289 { "cnt", CTLTYPE_NODE }, \ 290 { "rtip", CTLTYPE_NODE }, \ 291 { "ipx", CTLTYPE_NODE }, \ 292 { "sip", CTLTYPE_NODE }, \ 293 { "pip", CTLTYPE_NODE }, \ 294 { "isdn", CTLTYPE_NODE }, \ 295 { "key", CTLTYPE_NODE }, \ 296 { "inet6", CTLTYPE_NODE }, \ 297 { "natm", CTLTYPE_NODE }, \ 298 { "atm", CTLTYPE_NODE }, \ 299 { "hdrcomplete", CTLTYPE_NODE }, \ 300 { "netgraph", CTLTYPE_NODE }, \ 301 } 302 303 /* 304 * PF_ROUTE - Routing table 305 * 306 * Three additional levels are defined: 307 * Fourth: address family, 0 is wildcard 308 * Fifth: type of info, defined below 309 * Sixth: flag(s) to mask with for NET_RT_FLAGS 310 */ 311 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */ 312 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */ 313 #define NET_RT_IFLIST 3 /* survey interface list */ 314 #define NET_RT_MAXID 4 315 316 #define CTL_NET_RT_NAMES { \ 317 { 0, 0 }, \ 318 { "dump", CTLTYPE_STRUCT }, \ 319 { "flags", CTLTYPE_STRUCT }, \ 320 { "iflist", CTLTYPE_STRUCT }, \ 321 } 322 323 /* 324 * Maximum queue length specifiable by listen. 325 */ 326 #define SOMAXCONN 128 327 328 /* 329 * Message header for recvmsg and sendmsg calls. 330 * Used value-result for recvmsg, value only for sendmsg. 331 */ 332 struct msghdr { 333 void *msg_name; /* optional address */ 334 socklen_t msg_namelen; /* size of address */ 335 struct iovec *msg_iov; /* scatter/gather array */ 336 int msg_iovlen; /* # elements in msg_iov */ 337 void *msg_control; /* ancillary data, see below */ 338 socklen_t msg_controllen; /* ancillary data buffer len */ 339 int msg_flags; /* flags on received message */ 340 }; 341 342 #define MSG_OOB 0x00000001 /* process out-of-band data */ 343 #define MSG_PEEK 0x00000002 /* peek at incoming message */ 344 #define MSG_DONTROUTE 0x00000004 /* send without using routing tables */ 345 #define MSG_EOR 0x00000008 /* data completes record */ 346 #define MSG_TRUNC 0x00000010 /* data discarded before delivery */ 347 #define MSG_CTRUNC 0x00000020 /* control data lost before delivery */ 348 #define MSG_WAITALL 0x00000040 /* wait for full request or error */ 349 #define MSG_DONTWAIT 0x00000080 /* this message should be nonblocking */ 350 #define MSG_EOF 0x00000100 /* data completes connection */ 351 #define MSG_NOTIFICATION 0x00000200 /* notification message */ 352 353 /* 354 * These override FIONBIO. MSG_FNONBLOCKING is functionally equivalent to 355 * MSG_DONTWAIT. 356 */ 357 #define MSG_FBLOCKING 0x00010000 /* force blocking operation */ 358 #define MSG_FNONBLOCKING 0x00020000 /* force non-blocking operation */ 359 360 #define MSG_FMASK 0xFFFF0000 /* force mask */ 361 362 /* 363 * Header for ancillary data objects in msg_control buffer. 364 * Used for additional information with/about a datagram 365 * not expressible by flags. The format is a sequence 366 * of message elements headed by cmsghdr structures. 367 */ 368 struct cmsghdr { 369 socklen_t cmsg_len; /* data byte count, including hdr */ 370 int cmsg_level; /* originating protocol */ 371 int cmsg_type; /* protocol-specific type */ 372 /* followed by u_char cmsg_data[]; */ 373 }; 374 375 /* 376 * While we may have more groups than this, the cmsgcred struct must 377 * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow 378 * this. 379 */ 380 #define CMGROUP_MAX 16 381 382 /* 383 * Credentials structure, used to verify the identity of a peer 384 * process that has sent us a message. This is allocated by the 385 * peer process but filled in by the kernel. This prevents the 386 * peer from lying about its identity. (Note that cmcred_groups[0] 387 * is the effective GID.) 388 */ 389 struct cmsgcred { 390 pid_t cmcred_pid; /* PID of sending process */ 391 uid_t cmcred_uid; /* real UID of sending process */ 392 uid_t cmcred_euid; /* effective UID of sending process */ 393 gid_t cmcred_gid; /* real GID of sending process */ 394 short cmcred_ngroups; /* number or groups */ 395 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */ 396 }; 397 398 /* given pointer to struct cmsghdr, return pointer to data */ 399 #define CMSG_DATA(cmsg) ((unsigned char *)(cmsg) + \ 400 _ALIGN(sizeof(struct cmsghdr))) 401 402 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */ 403 #define CMSG_NXTHDR(mhdr, cmsg) \ 404 (((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \ 405 _ALIGN(sizeof(struct cmsghdr)) > \ 406 (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \ 407 (struct cmsghdr *)NULL : \ 408 (struct cmsghdr *)((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len))) 409 410 /* 411 * RFC 2292 requires to check msg_controllen, in case that the kernel returns 412 * an empty list for some reasons. 413 */ 414 #define CMSG_FIRSTHDR(mhdr) \ 415 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \ 416 (struct cmsghdr *)(mhdr)->msg_control : \ 417 (struct cmsghdr *)NULL) 418 419 /* RFC 2292 additions */ 420 421 #define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l)) 422 #define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l)) 423 424 #ifdef _KERNEL 425 #define CMSG_ALIGN(n) _ALIGN(n) 426 #endif 427 428 /* "Socket"-level control message types: */ 429 #define SCM_RIGHTS 0x01 /* access rights (array of int) */ 430 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */ 431 #define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */ 432 433 /* 434 * howto arguments for shutdown(2), specified by Posix.1g. 435 */ 436 #define SHUT_RD 0 /* shut down the reading side */ 437 #define SHUT_WR 1 /* shut down the writing side */ 438 #define SHUT_RDWR 2 /* shut down both sides */ 439 440 /* 441 * sendfile(2) header/trailer struct 442 */ 443 struct sf_hdtr { 444 struct iovec *headers; /* pointer to an array of header struct iovec's */ 445 int hdr_cnt; /* number of header iovec's */ 446 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */ 447 int trl_cnt; /* number of trailer iovec's */ 448 }; 449 450 #ifndef _KERNEL 451 452 #ifndef _SYS_CDEFS_H_ 453 #include <sys/cdefs.h> 454 #endif 455 456 __BEGIN_DECLS 457 int accept (int, struct sockaddr *, socklen_t *); 458 int extaccept (int, int, struct sockaddr *, socklen_t *); 459 int bind (int, const struct sockaddr *, socklen_t); 460 int connect (int, const struct sockaddr *, socklen_t); 461 int extconnect (int, int, struct sockaddr *, socklen_t); 462 int getpeername (int, struct sockaddr *, socklen_t *); 463 int getsockname (int, struct sockaddr *, socklen_t *); 464 int getsockopt (int, int, int, void *, socklen_t *); 465 int listen (int, int); 466 ssize_t recv (int, void *, size_t, int); 467 ssize_t recvfrom (int, void *, size_t, int, struct sockaddr *, socklen_t *); 468 ssize_t recvmsg (int, struct msghdr *, int); 469 ssize_t send (int, const void *, size_t, int); 470 ssize_t sendto (int, const void *, 471 size_t, int, const struct sockaddr *, socklen_t); 472 ssize_t sendmsg (int, const struct msghdr *, int); 473 int sendfile (int, int, off_t, size_t, struct sf_hdtr *, off_t *, int); 474 int setsockopt (int, int, int, const void *, socklen_t); 475 int shutdown (int, int); 476 int socketpair (int, int, int, int *); 477 478 void pfctlinput (int, struct sockaddr *); 479 __END_DECLS 480 481 #endif /* !_KERNEL */ 482 483 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL) 484 #ifndef _SYS_CDEFS_H_ 485 #include <sys/cdefs.h> 486 #endif 487 488 __BEGIN_DECLS 489 int socket (int, int, int); 490 __END_DECLS 491 #endif /* !_KERNEL || _KERNEL_VIRTUAL */ 492 493 #endif /* !_SYS_SOCKET_H_ */ 494