1/* $NetBSD: socket.h,v 1.132 2024/01/22 18:50:46 christos Exp $ */ 2 3/* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32/* 33 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)socket.h 8.6 (Berkeley) 5/3/95 61 */ 62 63#ifndef _SYS_SOCKET_H_ 64#define _SYS_SOCKET_H_ 65 66#include <sys/featuretest.h> 67 68/* 69 * Definitions related to sockets: types, address families, options. 70 */ 71 72/* 73 * Data types. 74 */ 75#include <sys/ansi.h> 76 77#ifndef sa_family_t 78typedef __sa_family_t sa_family_t; 79#define sa_family_t __sa_family_t 80#endif 81 82#ifndef socklen_t 83typedef __socklen_t socklen_t; 84#define socklen_t __socklen_t 85#endif 86 87#include <machine/ansi.h> 88 89#ifdef _BSD_SIZE_T_ 90typedef _BSD_SIZE_T_ size_t; 91#undef _BSD_SIZE_T_ 92#endif 93 94#ifdef _BSD_SSIZE_T_ 95typedef _BSD_SSIZE_T_ ssize_t; 96#undef _BSD_SSIZE_T_ 97#endif 98 99#include <sys/uio.h> 100#include <sys/sigtypes.h> 101 102/* 103 * Socket types. 104 */ 105#define SOCK_STREAM 1 /* stream socket */ 106#define SOCK_DGRAM 2 /* datagram socket */ 107#define SOCK_RAW 3 /* raw-protocol interface */ 108#define SOCK_RDM 4 /* reliably-delivered message */ 109#define SOCK_SEQPACKET 5 /* sequenced packet stream */ 110#define SOCK_CONN_DGRAM 6 /* connection-orientated datagram */ 111#define SOCK_DCCP SOCK_CONN_DGRAM 112 113#define SOCK_CLOEXEC 0x10000000 /* set close on exec on socket */ 114#define SOCK_NONBLOCK 0x20000000 /* set non blocking i/o socket */ 115#define SOCK_NOSIGPIPE 0x40000000 /* don't send sigpipe */ 116#define SOCK_FLAGS_MASK 0xf0000000 /* flags mask */ 117 118/* 119 * Option flags per-socket. 120 */ 121#define SO_DEBUG 0x0001 /* turn on debugging info recording */ 122#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ 123#define SO_REUSEADDR 0x0004 /* allow local address reuse */ 124#define SO_KEEPALIVE 0x0008 /* keep connections alive */ 125#define SO_DONTROUTE 0x0010 /* just use interface addresses */ 126#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ 127#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ 128#define SO_LINGER 0x0080 /* linger on close if data present */ 129#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ 130#define SO_REUSEPORT 0x0200 /* allow local address & port reuse */ 131/* SO_OTIMESTAMP 0x0400 */ 132#define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */ 133#define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */ 134#define SO_TIMESTAMP 0x2000 /* timestamp received dgram traffic */ 135#define SO_RERROR 0x4000 /* Keep track of receive errors */ 136 137/* Allowed default option flags */ 138#define SO_DEFOPTS (SO_DEBUG|SO_REUSEADDR|SO_KEEPALIVE|SO_DONTROUTE| \ 139 SO_BROADCAST|SO_USELOOPBACK|SO_LINGER|SO_OOBINLINE|SO_REUSEPORT| \ 140 SO_NOSIGPIPE|SO_TIMESTAMP|SO_RERROR) 141 142#define __SO_OPTION_BITS \ 143 "\20" \ 144 "\1SO_DEBUG" \ 145 "\2SO_ACCEPTCONN" \ 146 "\3SO_REUSEADDR" \ 147 "\4SO_KEEPALIVE" \ 148 "\5SO_DONTROUTE" \ 149 "\6SO_BROADCAST" \ 150 "\7SO_USELOOPBACK" \ 151 "\10SO_LINGER" \ 152 "\11SO_OOBINLINE" \ 153 "\12SO_REUSEPORT" \ 154 "\13SO_OTIMESTAMP" \ 155 "\14SO_NOSIGPIPE" \ 156 "\15SO_ACCEPTFILTER" \ 157 "\16SO_TIMESTAMP" \ 158 "\17SO_RERROR" 159 160/* 161 * Additional options, not kept in so_options. 162 */ 163#define SO_SNDBUF 0x1001 /* send buffer size */ 164#define SO_RCVBUF 0x1002 /* receive buffer size */ 165#define SO_SNDLOWAT 0x1003 /* send low-water mark */ 166#define SO_RCVLOWAT 0x1004 /* receive low-water mark */ 167/* SO_OSNDTIMEO 0x1005 */ 168/* SO_ORCVTIMEO 0x1006 */ 169#define SO_ERROR 0x1007 /* get error status and clear */ 170#define SO_TYPE 0x1008 /* get socket type */ 171#define SO_OVERFLOWED 0x1009 /* datagrams: return packets dropped */ 172 173#define SO_NOHEADER 0x100a /* user supplies no header to kernel; 174 * kernel removes header and supplies 175 * payload 176 */ 177#define SO_SNDTIMEO 0x100b /* send timeout */ 178#define SO_RCVTIMEO 0x100c /* receive timeout */ 179/* 180 * Structure used for manipulating linger option. 181 */ 182struct linger { 183 int l_onoff; /* option on/off */ 184 int l_linger; /* linger time in seconds */ 185}; 186 187struct accept_filter_arg { 188 char af_name[16]; 189 char af_arg[256-16]; 190}; 191 192/* 193 * Level number for (get/set)sockopt() to apply to socket itself. 194 */ 195#define SOL_SOCKET 0xffff /* options for socket level */ 196 197/* 198 * Address families. 199 */ 200#define AF_UNSPEC 0 /* unspecified */ 201#define AF_LOCAL 1 /* local to host */ 202#define AF_UNIX AF_LOCAL /* backward compatibility */ 203#define AF_INET 2 /* internetwork: UDP, TCP, etc. */ 204#define AF_IMPLINK 3 /* arpanet imp addresses */ 205#define AF_PUP 4 /* pup protocols: e.g. BSP */ 206#define AF_CHAOS 5 /* mit CHAOS protocols */ 207#define AF_NS 6 /* XEROX NS protocols */ 208#define AF_ISO 7 /* ISO protocols */ 209#define AF_OSI AF_ISO 210#define AF_ECMA 8 /* european computer manufacturers */ 211#define AF_DATAKIT 9 /* datakit protocols */ 212#define AF_CCITT 10 /* CCITT protocols, X.25 etc */ 213#define AF_SNA 11 /* IBM SNA */ 214#define AF_DECnet 12 /* DECnet */ 215#define AF_DLI 13 /* DEC Direct data link interface */ 216#define AF_LAT 14 /* LAT */ 217#define AF_HYLINK 15 /* NSC Hyperchannel */ 218#define AF_APPLETALK 16 /* Apple Talk */ 219#define AF_OROUTE 17 /* Internal Routing Protocol */ 220#define AF_LINK 18 /* Link layer interface */ 221#if defined(_NETBSD_SOURCE) 222#define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */ 223#endif 224#define AF_COIP 20 /* connection-oriented IP, aka ST II */ 225#define AF_CNT 21 /* Computer Network Technology */ 226#if defined(_NETBSD_SOURCE) 227#define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */ 228#endif 229#define AF_IPX 23 /* Novell Internet Protocol */ 230#define AF_INET6 24 /* IP version 6 */ 231#if defined(_NETBSD_SOURCE) 232#define pseudo_AF_PIP 25 /* Help Identify PIP packets */ 233#endif 234#define AF_ISDN 26 /* Integrated Services Digital Network*/ 235#define AF_E164 AF_ISDN /* CCITT E.164 recommendation */ 236#define AF_NATM 27 /* native ATM access */ 237#define AF_ARP 28 /* (rev.) addr. res. prot. (RFC 826) */ 238#if defined(_NETBSD_SOURCE) 239#define pseudo_AF_KEY 29 /* Internal key management protocol */ 240#define pseudo_AF_HDRCMPLT 30 /* Used by BPF to not rewrite hdrs 241 in interface output routine */ 242#endif 243#define AF_BLUETOOTH 31 /* Bluetooth: HCI, SCO, L2CAP, RFCOMM */ 244#define AF_IEEE80211 32 /* IEEE80211 */ 245#define AF_MPLS 33 /* MultiProtocol Label Switching */ 246#define AF_ROUTE 34 /* Internal Routing Protocol */ 247#define AF_CAN 35 248#define AF_ETHER 36 249#define AF_MAX 37 250 251/* 252 * Structure used by kernel to store most 253 * addresses. 254 */ 255struct sockaddr { 256 __uint8_t sa_len; /* total length */ 257 sa_family_t sa_family; /* address family */ 258 char sa_data[14]; /* actually longer; address value */ 259}; 260 261#if defined(_KERNEL) 262/* 263 * Structure used by kernel to pass protocol 264 * information in raw sockets. 265 */ 266struct sockproto { 267 u_short sp_family; /* address family */ 268 u_short sp_protocol; /* protocol */ 269}; 270 271/* 272 * we make the entire struct at least UCHAR_MAX + 1 in size since existing 273 * use of sockaddr_un permits a path up to 253 bytes + '\0'. 274 * sizeof(sb_len) + sizeof(sb_family) + 253 + '\0' 275 */ 276#define _SB_DATASIZE 254 277struct sockaddr_big { 278 union { 279 struct { 280 __uint8_t sb_len; 281 sa_family_t sb_family; 282 char sb_data[_SB_DATASIZE]; 283 }; 284 uint64_t dummy; /* solicit natural alignment */ 285 }; 286}; 287 288#endif /* _KERNEL */ 289 290/* 291 * RFC 2553: protocol-independent placeholder for socket addresses 292 */ 293#define _SS_MAXSIZE 128 294#define _SS_ALIGNSIZE (sizeof(__int64_t)) 295#define _SS_PAD1SIZE (_SS_ALIGNSIZE - 2) 296#define _SS_PAD2SIZE (_SS_MAXSIZE - 2 - _SS_PAD1SIZE - _SS_ALIGNSIZE) 297 298struct sockaddr_storage { 299 __uint8_t ss_len; /* address length */ 300 sa_family_t ss_family; /* address family */ 301 char __ss_pad1[_SS_PAD1SIZE]; 302 __int64_t __ss_align;/* force desired structure storage alignment */ 303 char __ss_pad2[_SS_PAD2SIZE]; 304}; 305 306#if defined(_NETBSD_SOURCE) 307#define sstosa(__ss) ((struct sockaddr *)(__ss)) 308#define sstocsa(__ss) ((const struct sockaddr *)(__ss)) 309#endif /* _NETBSD_SOURCE */ 310 311/* 312 * Protocol families, same as address families for now. 313 */ 314#define PF_UNSPEC AF_UNSPEC 315#define PF_LOCAL AF_LOCAL 316#define PF_UNIX PF_LOCAL /* backward compatibility */ 317#define PF_INET AF_INET 318#define PF_IMPLINK AF_IMPLINK 319#define PF_PUP AF_PUP 320#define PF_CHAOS AF_CHAOS 321#define PF_NS AF_NS 322#define PF_ISO AF_ISO 323#define PF_OSI AF_ISO 324#define PF_ECMA AF_ECMA 325#define PF_DATAKIT AF_DATAKIT 326#define PF_CCITT AF_CCITT 327#define PF_SNA AF_SNA 328#define PF_DECnet AF_DECnet 329#define PF_DLI AF_DLI 330#define PF_LAT AF_LAT 331#define PF_HYLINK AF_HYLINK 332#define PF_APPLETALK AF_APPLETALK 333#define PF_OROUTE AF_OROUTE 334#define PF_LINK AF_LINK 335#if defined(_NETBSD_SOURCE) 336#define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */ 337#endif 338#define PF_COIP AF_COIP 339#define PF_CNT AF_CNT 340#define PF_INET6 AF_INET6 341#define PF_IPX AF_IPX /* same format as AF_NS */ 342#if defined(_NETBSD_SOURCE) 343#define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */ 344#define PF_PIP pseudo_AF_PIP 345#endif 346#define PF_ISDN AF_ISDN /* same as E164 */ 347#define PF_E164 AF_E164 348#define PF_NATM AF_NATM 349#define PF_ARP AF_ARP 350#if defined(_NETBSD_SOURCE) 351#define PF_KEY pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */ 352#endif 353#define PF_BLUETOOTH AF_BLUETOOTH 354#define PF_MPLS AF_MPLS 355#define PF_ROUTE AF_ROUTE 356#define PF_CAN AF_CAN 357#define PF_ETHER AF_ETHER 358 359#define PF_MAX AF_MAX 360 361#if defined(_NETBSD_SOURCE) 362 363#ifndef pid_t 364typedef __pid_t pid_t; /* process id */ 365#define pid_t __pid_t 366#endif 367 368#ifndef gid_t 369typedef __gid_t gid_t; /* group id */ 370#define gid_t __gid_t 371#endif 372 373#ifndef uid_t 374typedef __uid_t uid_t; /* user id */ 375#define uid_t __uid_t 376#endif 377 378/* 379 * Socket credentials. 380 */ 381struct sockcred { 382 pid_t sc_pid; /* process id */ 383 uid_t sc_uid; /* real user id */ 384 uid_t sc_euid; /* effective user id */ 385 gid_t sc_gid; /* real group id */ 386 gid_t sc_egid; /* effective group id */ 387 int sc_ngroups; /* number of supplemental groups */ 388 gid_t sc_groups[1]; /* variable length */ 389}; 390 391/* 392 * Compute size of a sockcred structure with groups. 393 * 394 * The (ngrps - 1) is to account for struct sockcred being defined with 395 * already one group member. This code works correctly when ngroups == 0 396 * because of unsigned arithmetic wrap-around. 397 */ 398#define SOCKCREDSIZE(ngrps) \ 399 (/*LINTED*/sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1))) 400#endif /* _NETBSD_SOURCE */ 401 402 403#if defined(_NETBSD_SOURCE) 404/* Definition for CTL_NET PCB fetching sysctls */ 405struct kinfo_pcb { 406 __uint64_t ki_pcbaddr; /* PTR: pcb addr */ 407 __uint64_t ki_ppcbaddr; /* PTR: ppcb addr */ 408 __uint64_t ki_sockaddr; /* PTR: socket addr */ 409 410 __uint32_t ki_family; /* INT: protocol family */ 411 __uint32_t ki_type; /* INT: socket type */ 412 __uint32_t ki_protocol; /* INT: protocol */ 413 __uint32_t ki_pflags; /* INT: generic protocol flags */ 414 415 __uint32_t ki_sostate; /* INT: socket state */ 416 __uint32_t ki_prstate; /* INT: protocol state */ 417 __int32_t ki_tstate; /* INT: tcp state */ 418 __uint32_t ki_tflags; /* INT: tcp flags */ 419 420 __uint64_t ki_rcvq; /* U_LONG: receive queue len */ 421 __uint64_t ki_sndq; /* U_LONG: send queue len */ 422 423 union { 424 struct sockaddr _kis_src; /* STRUCT: local address */ 425 char _kis_pad[256 + 8]; /* pad to max addr length */ 426 } ki_s; 427 union { 428 struct sockaddr _kid_dst; /* STRUCT: remote address */ 429 char _kid_pad[256 + 8]; /* pad to max addr length */ 430 } ki_d; 431 432 __uint64_t ki_inode; /* INO_T: fake inode number */ 433 __uint64_t ki_vnode; /* PTR: if associated with file */ 434 __uint64_t ki_conn; /* PTR: control block of peer */ 435 __uint64_t ki_refs; /* PTR: referencing socket */ 436 __uint64_t ki_nextref; /* PTR: link in refs list */ 437}; 438 439#define ki_src ki_s._kis_src 440#define ki_dst ki_d._kid_dst 441#define ki_spad ki_s._kis_pad 442#define ki_dpad ki_d._kid_pad 443 444#define PCB_SLOP 20 445#define PCB_ALL 0 446 447#endif /* _NETBSD_SOURCE */ 448 449#if defined(_NETBSD_SOURCE) 450/* 451 * PF_ROUTE - Routing table 452 * 453 * Three additional levels are defined: 454 * Fourth: address family, 0 is wildcard 455 * Fifth: type of info, defined below 456 * Sixth: flag(s) to mask with for NET_RT_FLAGS 457 */ 458#define NET_RT_DUMP 1 /* dump; may limit to a.f. */ 459#define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */ 460#define NET_RT_OOOIFLIST 3 /* old NET_RT_IFLIST (pre 1.5) */ 461#define NET_RT_OOIFLIST 4 /* old NET_RT_IFLIST (pre-64bit time) */ 462#define NET_RT_OIFLIST 5 /* old NET_RT_IFLIST (pre 8.0) */ 463#define NET_RT_IFLIST 6 /* survey interface list */ 464 465#endif /* _NETBSD_SOURCE */ 466 467/* 468 * Maximum queue length specifiable by listen(2). 469 */ 470#ifndef SOMAXCONN 471#define SOMAXCONN 128 472#endif 473 474#include <sys/cdefs.h> 475 476/* 477 * Message header for recvmsg and sendmsg calls. 478 * Used value-result for recvmsg, value only for sendmsg. 479 */ 480struct msghdr { 481 void *msg_name; /* optional address */ 482 socklen_t msg_namelen; /* size of address */ 483 struct iovec *msg_iov; /* scatter/gather array */ 484 int msg_iovlen; /* # elements in msg_iov */ 485 void *msg_control; /* ancillary data, see below */ 486 socklen_t msg_controllen; /* ancillary data buffer len */ 487 int msg_flags; /* flags on received message */ 488}; 489 490#define MSG_OOB 0x0001 /* process out-of-band data */ 491#define MSG_PEEK 0x0002 /* peek at incoming message */ 492#define MSG_DONTROUTE 0x0004 /* send without using routing tables */ 493#define MSG_EOR 0x0008 /* data completes record */ 494#define MSG_TRUNC 0x0010 /* data discarded before delivery */ 495#define MSG_CTRUNC 0x0020 /* control data lost before delivery */ 496#define MSG_WAITALL 0x0040 /* wait for full request or error */ 497#define MSG_DONTWAIT 0x0080 /* this message should be nonblocking */ 498#define MSG_BCAST 0x0100 /* this message was rcvd using link-level brdcst */ 499#define MSG_MCAST 0x0200 /* this message was rcvd using link-level mcast */ 500#define MSG_NOSIGNAL 0x0400 /* do not generate SIGPIPE on EOF */ 501#if defined(_NETBSD_SOURCE) 502#define MSG_CMSG_CLOEXEC 0x0800 /* close on exec receiving fd */ 503#define MSG_NBIO 0x1000 /* use non-blocking I/O */ 504#define MSG_WAITFORONE 0x2000 /* recvmmsg() wait for one message */ 505#define MSG_NOTIFICATION 0x4000 /* SCTP notification */ 506 507struct mmsghdr { 508 struct msghdr msg_hdr; 509 unsigned int msg_len; 510}; 511#endif 512 513/* Extra flags used internally only */ 514#define MSG_USERFLAGS 0x0ffffff 515#define MSG_NAMEMBUF 0x1000000 /* msg_name is an mbuf */ 516#define MSG_CONTROLMBUF 0x2000000 /* msg_control is an mbuf */ 517#define MSG_IOVUSRSPACE 0x4000000 /* msg_iov is in user space */ 518#define MSG_LENUSRSPACE 0x8000000 /* address length is in user space */ 519 520/* 521 * Header for ancillary data objects in msg_control buffer. 522 * Used for additional information with/about a datagram 523 * not expressible by flags. The format is a sequence 524 * of message elements headed by cmsghdr structures. 525 */ 526struct cmsghdr { 527 socklen_t cmsg_len; /* data byte count, including hdr */ 528 int cmsg_level; /* originating protocol */ 529 int cmsg_type; /* protocol-specific type */ 530/* followed by unsigned char cmsg_data[]; */ 531}; 532 533/* 534 * Alignment requirement for CMSG struct manipulation. 535 * This basically behaves the same as ALIGN() ARCH/include/param.h. 536 * We declare it separately for two reasons: 537 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's 538 * idea of ALIGNBYTES at runtime. 539 * without (2), we can't guarantee binary compatibility in case of future 540 * changes in ALIGNBYTES. 541 */ 542#define __CMSG_ALIGN(n) (((n) + __ALIGNBYTES) & ~__ALIGNBYTES) 543 544#ifdef _KERNEL 545#define CMSG_ALIGN(n) __CMSG_ALIGN(n) 546#endif 547 548#define __CMSG_ASIZE __CMSG_ALIGN(sizeof(struct cmsghdr)) 549#define __CMSG_MSGNEXT(cmsg) \ 550 (__CASTV(char *, cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len)) 551#define __CMSG_MSGEND(mhdr) \ 552 (__CASTV(char *, (mhdr)->msg_control) + (mhdr)->msg_controllen) 553 554/* given pointer to struct cmsghdr, return pointer to data */ 555#define CMSG_DATA(cmsg) (__CASTV(unsigned char *, cmsg) + __CMSG_ASIZE) 556#define CCMSG_DATA(cmsg) (__CASTCV(const unsigned char *, cmsg) + __CMSG_ASIZE) 557 558/* given pointer to struct cmsghdr, return pointer to next cmsghdr */ 559#define CMSG_NXTHDR(mhdr, cmsg) \ 560 __CASTV(struct cmsghdr *, \ 561 __CMSG_MSGNEXT(cmsg) + __CMSG_ASIZE > __CMSG_MSGEND(mhdr) ? 0 : \ 562 __CMSG_MSGNEXT(cmsg)) 563 564/* 565 * RFC 2292 requires to check msg_controllen, in case that the kernel returns 566 * an empty list for some reasons. 567 */ 568#define CMSG_FIRSTHDR(mhdr) \ 569 __CASTV(struct cmsghdr *, \ 570 (mhdr)->msg_controllen < sizeof(struct cmsghdr) ? 0 : \ 571 (mhdr)->msg_control) 572 573#define CMSG_SPACE(l) (__CMSG_ASIZE + __CMSG_ALIGN(l)) 574#define CMSG_LEN(l) (__CMSG_ASIZE + (l)) 575 576/* "Socket"-level control message types: */ 577#define SCM_RIGHTS 0x01 /* access rights (array of int) */ 578#if defined(_NETBSD_SOURCE) 579/* 0x02 timestamp (struct timeval50) */ 580/* 0x04 credentials (struct sockcred70) */ 581#define SCM_TIMESTAMP 0x08 /* timestamp (struct timeval) */ 582#define SCM_CREDS 0x10 /* credentials (struct sockcred) */ 583#endif 584 585/* 586 * Types of socket shutdown(2). 587 */ 588#define SHUT_RD 0 /* Disallow further receives. */ 589#define SHUT_WR 1 /* Disallow further sends. */ 590#define SHUT_RDWR 2 /* Disallow further sends/receives. */ 591 592#ifdef _KERNEL 593static __inline socklen_t 594sockaddr_getlen(const struct sockaddr *sa) 595{ 596 return sa->sa_len; 597} 598 599__BEGIN_DECLS 600socklen_t sockaddr_getsize_by_family(sa_family_t); 601struct sockaddr *sockaddr_copy(struct sockaddr *, socklen_t, 602 const struct sockaddr *); 603struct sockaddr *sockaddr_externalize(struct sockaddr *, socklen_t, 604 const struct sockaddr *); 605struct sockaddr *sockaddr_alloc(sa_family_t, socklen_t, int); 606const void *sockaddr_const_addr(const struct sockaddr *, socklen_t *); 607void *sockaddr_addr(struct sockaddr *, socklen_t *); 608const struct sockaddr *sockaddr_any(const struct sockaddr *); 609const struct sockaddr *sockaddr_any_by_family(sa_family_t); 610const void *sockaddr_anyaddr(const struct sockaddr *, socklen_t *); 611int sockaddr_cmp(const struct sockaddr *, const struct sockaddr *); 612struct sockaddr *sockaddr_dup(const struct sockaddr *, int); 613int sockaddr_format(const struct sockaddr *, char *, size_t); 614void sockaddr_free(struct sockaddr *); 615__END_DECLS 616#endif /* _KERNEL */ 617 618#ifndef _KERNEL 619 620__BEGIN_DECLS 621int accept(int, struct sockaddr * __restrict, socklen_t * __restrict); 622int accept4(int, struct sockaddr * __restrict, socklen_t * __restrict, int); 623int bind(int, const struct sockaddr *, socklen_t); 624int connect(int, const struct sockaddr *, socklen_t); 625int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict); 626int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict); 627int getsockopt(int, int, int, void *__restrict, socklen_t * __restrict); 628int getsockopt2(int, int, int, void *__restrict, socklen_t * __restrict); 629int listen(int, int); 630int paccept(int, struct sockaddr * __restrict, socklen_t * __restrict, 631 const sigset_t * __restrict, int); 632ssize_t recv(int, void *, size_t, int); 633ssize_t recvfrom(int, void *__restrict, size_t, int, 634 struct sockaddr * __restrict, socklen_t * __restrict); 635ssize_t recvmsg(int, struct msghdr *, int); 636ssize_t send(int, const void *, size_t, int); 637ssize_t sendto(int, const void *, 638 size_t, int, const struct sockaddr *, socklen_t); 639ssize_t sendmsg(int, const struct msghdr *, int); 640int setsockopt(int, int, int, const void *, socklen_t); 641int shutdown(int, int); 642int sockatmark(int); 643int socket(int, int, int) 644#if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE) 645__RENAME(__socket30) 646#endif 647 ; 648int socketpair(int, int, int, int *); 649 650#if defined(_NETBSD_SOURCE) 651int sendmmsg(int, struct mmsghdr *, unsigned int, unsigned int); 652struct timespec; 653int recvmmsg(int, struct mmsghdr *, unsigned int, unsigned int, 654 struct timespec *); 655#endif 656__END_DECLS 657#endif /* !_KERNEL */ 658 659#endif /* !_SYS_SOCKET_H_ */ 660