1 /* $NetBSD: socket.h,v 1.134 2025/07/25 23:24:46 kre 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 78 typedef __sa_family_t sa_family_t; 79 #define sa_family_t __sa_family_t 80 #endif 81 82 #ifndef socklen_t 83 typedef __socklen_t socklen_t; 84 #define socklen_t __socklen_t 85 #endif 86 87 #include <machine/ansi.h> 88 89 #ifdef _BSD_SIZE_T_ 90 typedef _BSD_SIZE_T_ size_t; 91 #undef _BSD_SIZE_T_ 92 #endif 93 94 #ifdef _BSD_SSIZE_T_ 95 typedef _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_CLOFORK 0x80000000 /* set close on fork on socket */ 117 #define SOCK_FLAGS_MASK 0xf0000000 /* flags mask */ 118 119 /* 120 * Option flags per-socket. 121 */ 122 #define SO_DEBUG 0x0001 /* turn on debugging info recording */ 123 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ 124 #define SO_REUSEADDR 0x0004 /* allow local address reuse */ 125 #define SO_KEEPALIVE 0x0008 /* keep connections alive */ 126 #define SO_DONTROUTE 0x0010 /* just use interface addresses */ 127 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ 128 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ 129 #define SO_LINGER 0x0080 /* linger on close if data present */ 130 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ 131 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */ 132 /* SO_OTIMESTAMP 0x0400 */ 133 #define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */ 134 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */ 135 #define SO_TIMESTAMP 0x2000 /* timestamp received dgram traffic */ 136 #define SO_RERROR 0x4000 /* Keep track of receive errors */ 137 138 /* Allowed default option flags */ 139 #define SO_DEFOPTS (SO_DEBUG|SO_REUSEADDR|SO_KEEPALIVE|SO_DONTROUTE| \ 140 SO_BROADCAST|SO_USELOOPBACK|SO_LINGER|SO_OOBINLINE|SO_REUSEPORT| \ 141 SO_NOSIGPIPE|SO_TIMESTAMP|SO_RERROR) 142 143 #define __SO_OPTION_BITS \ 144 "\20" \ 145 "\1SO_DEBUG" \ 146 "\2SO_ACCEPTCONN" \ 147 "\3SO_REUSEADDR" \ 148 "\4SO_KEEPALIVE" \ 149 "\5SO_DONTROUTE" \ 150 "\6SO_BROADCAST" \ 151 "\7SO_USELOOPBACK" \ 152 "\10SO_LINGER" \ 153 "\11SO_OOBINLINE" \ 154 "\12SO_REUSEPORT" \ 155 "\13SO_OTIMESTAMP" \ 156 "\14SO_NOSIGPIPE" \ 157 "\15SO_ACCEPTFILTER" \ 158 "\16SO_TIMESTAMP" \ 159 "\17SO_RERROR" 160 161 /* 162 * Additional options, not kept in so_options. 163 */ 164 #define SO_SNDBUF 0x1001 /* send buffer size */ 165 #define SO_RCVBUF 0x1002 /* receive buffer size */ 166 #define SO_SNDLOWAT 0x1003 /* send low-water mark */ 167 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */ 168 /* SO_OSNDTIMEO 0x1005 */ 169 /* SO_ORCVTIMEO 0x1006 */ 170 #define SO_ERROR 0x1007 /* get error status and clear */ 171 #define SO_TYPE 0x1008 /* get socket type */ 172 #define SO_OVERFLOWED 0x1009 /* datagrams: return packets dropped */ 173 174 #define SO_NOHEADER 0x100a /* user supplies no header to kernel; 175 * kernel removes header and supplies 176 * payload 177 */ 178 #define SO_SNDTIMEO 0x100b /* send timeout */ 179 #define SO_RCVTIMEO 0x100c /* receive timeout */ 180 /* 181 * Structure used for manipulating linger option. 182 */ 183 struct linger { 184 int l_onoff; /* option on/off */ 185 int l_linger; /* linger time in seconds */ 186 }; 187 188 struct accept_filter_arg { 189 char af_name[16]; 190 char af_arg[256-16]; 191 }; 192 193 /* 194 * Level number for (get/set)sockopt() to apply to socket itself. 195 */ 196 #define SOL_SOCKET 0xffff /* options for socket level */ 197 198 /* 199 * Address families. 200 */ 201 #define AF_UNSPEC 0 /* unspecified */ 202 #define AF_LOCAL 1 /* local to host */ 203 #define AF_UNIX AF_LOCAL /* backward compatibility */ 204 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */ 205 #define AF_IMPLINK 3 /* arpanet imp addresses */ 206 #define AF_PUP 4 /* pup protocols: e.g. BSP */ 207 #define AF_CHAOS 5 /* mit CHAOS protocols */ 208 #define AF_NS 6 /* XEROX NS protocols */ 209 #define AF_ISO 7 /* ISO protocols */ 210 #define AF_OSI AF_ISO 211 #define AF_ECMA 8 /* european computer manufacturers */ 212 #define AF_DATAKIT 9 /* datakit protocols */ 213 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */ 214 #define AF_SNA 11 /* IBM SNA */ 215 #define AF_DECnet 12 /* DECnet */ 216 #define AF_DLI 13 /* DEC Direct data link interface */ 217 #define AF_LAT 14 /* LAT */ 218 #define AF_HYLINK 15 /* NSC Hyperchannel */ 219 #define AF_APPLETALK 16 /* Apple Talk */ 220 #define AF_OROUTE 17 /* Internal Routing Protocol */ 221 #define AF_LINK 18 /* Link layer interface */ 222 #if defined(_NETBSD_SOURCE) 223 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */ 224 #endif 225 #define AF_COIP 20 /* connection-oriented IP, aka ST II */ 226 #define AF_CNT 21 /* Computer Network Technology */ 227 #if defined(_NETBSD_SOURCE) 228 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */ 229 #endif 230 #define AF_IPX 23 /* Novell Internet Protocol */ 231 #define AF_INET6 24 /* IP version 6 */ 232 #if defined(_NETBSD_SOURCE) 233 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */ 234 #endif 235 #define AF_ISDN 26 /* Integrated Services Digital Network*/ 236 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */ 237 #define AF_NATM 27 /* native ATM access */ 238 #define AF_ARP 28 /* (rev.) addr. res. prot. (RFC 826) */ 239 #if defined(_NETBSD_SOURCE) 240 #define pseudo_AF_KEY 29 /* Internal key management protocol */ 241 #define pseudo_AF_HDRCMPLT 30 /* Used by BPF to not rewrite hdrs 242 in interface output routine */ 243 #endif 244 #define AF_BLUETOOTH 31 /* Bluetooth: HCI, SCO, L2CAP, RFCOMM */ 245 #define AF_IEEE80211 32 /* IEEE80211 */ 246 #define AF_MPLS 33 /* MultiProtocol Label Switching */ 247 #define AF_ROUTE 34 /* Internal Routing Protocol */ 248 #define AF_CAN 35 249 #define AF_ETHER 36 250 #define AF_MAX 37 251 252 /* 253 * Structure used by kernel to store most 254 * addresses. 255 */ 256 struct sockaddr { 257 __uint8_t sa_len; /* total length */ 258 sa_family_t sa_family; /* address family */ 259 char sa_data[14]; /* actually longer; address value */ 260 }; 261 262 #if defined(_KERNEL) 263 /* 264 * Structure used by kernel to pass protocol 265 * information in raw sockets. 266 */ 267 struct sockproto { 268 u_short sp_family; /* address family */ 269 u_short sp_protocol; /* protocol */ 270 }; 271 272 /* 273 * we make the entire struct at least UCHAR_MAX + 1 in size since existing 274 * use of sockaddr_un permits a path up to 253 bytes + '\0'. 275 * sizeof(sb_len) + sizeof(sb_family) + 253 + '\0' 276 */ 277 #define _SB_DATASIZE 254 278 struct sockaddr_big { 279 union { 280 struct { 281 __uint8_t sb_len; 282 sa_family_t sb_family; 283 char sb_data[_SB_DATASIZE]; 284 }; 285 uint64_t dummy; /* solicit natural alignment */ 286 }; 287 }; 288 289 #endif /* _KERNEL */ 290 291 /* 292 * RFC 2553: protocol-independent placeholder for socket addresses 293 */ 294 #define _SS_MAXSIZE 128 295 #define _SS_ALIGNSIZE (sizeof(__int64_t)) 296 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - 2) 297 #define _SS_PAD2SIZE (_SS_MAXSIZE - 2 - _SS_PAD1SIZE - _SS_ALIGNSIZE) 298 299 struct sockaddr_storage { 300 __uint8_t ss_len; /* address length */ 301 sa_family_t ss_family; /* address family */ 302 char __ss_pad1[_SS_PAD1SIZE]; 303 __int64_t __ss_align;/* force desired structure storage alignment */ 304 char __ss_pad2[_SS_PAD2SIZE]; 305 }; 306 307 #if defined(_NETBSD_SOURCE) 308 #define sstosa(__ss) ((struct sockaddr *)(__ss)) 309 #define sstocsa(__ss) ((const struct sockaddr *)(__ss)) 310 #endif /* _NETBSD_SOURCE */ 311 312 /* 313 * Protocol families, same as address families for now. 314 */ 315 #define PF_UNSPEC AF_UNSPEC 316 #define PF_LOCAL AF_LOCAL 317 #define PF_UNIX PF_LOCAL /* backward compatibility */ 318 #define PF_INET AF_INET 319 #define PF_IMPLINK AF_IMPLINK 320 #define PF_PUP AF_PUP 321 #define PF_CHAOS AF_CHAOS 322 #define PF_NS AF_NS 323 #define PF_ISO AF_ISO 324 #define PF_OSI AF_ISO 325 #define PF_ECMA AF_ECMA 326 #define PF_DATAKIT AF_DATAKIT 327 #define PF_CCITT AF_CCITT 328 #define PF_SNA AF_SNA 329 #define PF_DECnet AF_DECnet 330 #define PF_DLI AF_DLI 331 #define PF_LAT AF_LAT 332 #define PF_HYLINK AF_HYLINK 333 #define PF_APPLETALK AF_APPLETALK 334 #define PF_OROUTE AF_OROUTE 335 #define PF_LINK AF_LINK 336 #if defined(_NETBSD_SOURCE) 337 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */ 338 #endif 339 #define PF_COIP AF_COIP 340 #define PF_CNT AF_CNT 341 #define PF_INET6 AF_INET6 342 #define PF_IPX AF_IPX /* same format as AF_NS */ 343 #if defined(_NETBSD_SOURCE) 344 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */ 345 #define PF_PIP pseudo_AF_PIP 346 #endif 347 #define PF_ISDN AF_ISDN /* same as E164 */ 348 #define PF_E164 AF_E164 349 #define PF_NATM AF_NATM 350 #define PF_ARP AF_ARP 351 #if defined(_NETBSD_SOURCE) 352 #define PF_KEY pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */ 353 #endif 354 #define PF_BLUETOOTH AF_BLUETOOTH 355 #define PF_MPLS AF_MPLS 356 #define PF_ROUTE AF_ROUTE 357 #define PF_CAN AF_CAN 358 #define PF_ETHER AF_ETHER 359 360 #define PF_MAX AF_MAX 361 362 #if defined(_NETBSD_SOURCE) 363 364 #ifndef pid_t 365 typedef __pid_t pid_t; /* process id */ 366 #define pid_t __pid_t 367 #endif 368 369 #ifndef gid_t 370 typedef __gid_t gid_t; /* group id */ 371 #define gid_t __gid_t 372 #endif 373 374 #ifndef uid_t 375 typedef __uid_t uid_t; /* user id */ 376 #define uid_t __uid_t 377 #endif 378 379 /* 380 * Socket credentials. 381 */ 382 struct sockcred { 383 pid_t sc_pid; /* process id */ 384 uid_t sc_uid; /* real user id */ 385 uid_t sc_euid; /* effective user id */ 386 gid_t sc_gid; /* real group id */ 387 gid_t sc_egid; /* effective group id */ 388 int sc_ngroups; /* number of supplemental groups */ 389 gid_t sc_groups[1]; /* variable length */ 390 }; 391 392 /* 393 * Compute size of a sockcred structure with groups. 394 * 395 * The (ngrps - 1) is to account for struct sockcred being defined with 396 * already one group member. This code works correctly when ngroups == 0 397 * because of unsigned arithmetic wrap-around. 398 */ 399 #define SOCKCREDSIZE(ngrps) \ 400 (/*LINTED*/sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1))) 401 #endif /* _NETBSD_SOURCE */ 402 403 404 #if defined(_NETBSD_SOURCE) 405 /* Definition for CTL_NET PCB fetching sysctls */ 406 struct kinfo_pcb { 407 __uint64_t ki_pcbaddr; /* PTR: pcb addr */ 408 __uint64_t ki_ppcbaddr; /* PTR: ppcb addr */ 409 __uint64_t ki_sockaddr; /* PTR: socket addr */ 410 411 __uint32_t ki_family; /* INT: protocol family */ 412 __uint32_t ki_type; /* INT: socket type */ 413 __uint32_t ki_protocol; /* INT: protocol */ 414 __uint32_t ki_pflags; /* INT: generic protocol flags */ 415 416 __uint32_t ki_sostate; /* INT: socket state */ 417 __uint32_t ki_prstate; /* INT: protocol state */ 418 __int32_t ki_tstate; /* INT: tcp state */ 419 __uint32_t ki_tflags; /* INT: tcp flags */ 420 421 __uint64_t ki_rcvq; /* U_LONG: receive queue len */ 422 __uint64_t ki_sndq; /* U_LONG: send queue len */ 423 424 union { 425 struct sockaddr _kis_src; /* STRUCT: local address */ 426 char _kis_pad[256 + 8]; /* pad to max addr length */ 427 } ki_s; 428 union { 429 struct sockaddr _kid_dst; /* STRUCT: remote address */ 430 char _kid_pad[256 + 8]; /* pad to max addr length */ 431 } ki_d; 432 433 __uint64_t ki_inode; /* INO_T: fake inode number */ 434 __uint64_t ki_vnode; /* PTR: if associated with file */ 435 __uint64_t ki_conn; /* PTR: control block of peer */ 436 __uint64_t ki_refs; /* PTR: referencing socket */ 437 __uint64_t ki_nextref; /* PTR: link in refs list */ 438 }; 439 440 #define ki_src ki_s._kis_src 441 #define ki_dst ki_d._kid_dst 442 #define ki_spad ki_s._kis_pad 443 #define ki_dpad ki_d._kid_pad 444 445 #define PCB_SLOP 20 446 #define PCB_ALL 0 447 448 #endif /* _NETBSD_SOURCE */ 449 450 #if defined(_NETBSD_SOURCE) 451 /* 452 * PF_ROUTE - Routing table 453 * 454 * Three additional levels are defined: 455 * Fourth: address family, 0 is wildcard 456 * Fifth: type of info, defined below 457 * Sixth: flag(s) to mask with for NET_RT_FLAGS 458 */ 459 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */ 460 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */ 461 #define NET_RT_OOOIFLIST 3 /* old NET_RT_IFLIST (pre 1.5) */ 462 #define NET_RT_OOIFLIST 4 /* old NET_RT_IFLIST (pre-64bit time) */ 463 #define NET_RT_OIFLIST 5 /* old NET_RT_IFLIST (pre 8.0) */ 464 #define NET_RT_IFLIST 6 /* survey interface list */ 465 466 #endif /* _NETBSD_SOURCE */ 467 468 /* 469 * Maximum queue length specifiable by listen(2). 470 */ 471 #ifndef SOMAXCONN 472 #define SOMAXCONN 128 473 #endif 474 475 #include <sys/cdefs.h> 476 477 /* 478 * Message header for recvmsg and sendmsg calls. 479 * Used value-result for recvmsg, value only for sendmsg. 480 */ 481 struct msghdr { 482 void *msg_name; /* optional address */ 483 socklen_t msg_namelen; /* size of address */ 484 struct iovec *msg_iov; /* scatter/gather array */ 485 int msg_iovlen; /* # elements in msg_iov */ 486 void *msg_control; /* ancillary data, see below */ 487 socklen_t msg_controllen; /* ancillary data buffer len */ 488 int msg_flags; /* flags on received message */ 489 }; 490 491 #define MSG_OOB 0x0001 /* process out-of-band data */ 492 #define MSG_PEEK 0x0002 /* peek at incoming message */ 493 #define MSG_DONTROUTE 0x0004 /* send without using routing tables */ 494 #define MSG_EOR 0x0008 /* data completes record */ 495 #define MSG_TRUNC 0x0010 /* data discarded before delivery */ 496 #define MSG_CTRUNC 0x0020 /* control data lost before delivery */ 497 #define MSG_WAITALL 0x0040 /* wait for full request or error */ 498 #define MSG_DONTWAIT 0x0080 /* this message should be nonblocking */ 499 #define MSG_BCAST 0x0100 /* this message was rcvd using link-level brdcst */ 500 #define MSG_MCAST 0x0200 /* this message was rcvd using link-level mcast */ 501 #define MSG_NOSIGNAL 0x0400 /* do not generate SIGPIPE on EOF */ 502 #if defined(_NETBSD_SOURCE) 503 #define MSG_CMSG_CLOEXEC 0x0800 /* close on exec receiving fd */ 504 #define MSG_NBIO 0x1000 /* use non-blocking I/O */ 505 #define MSG_WAITFORONE 0x2000 /* recvmmsg() wait for one message */ 506 #define MSG_NOTIFICATION 0x4000 /* SCTP notification */ 507 #define MSG_CMSG_CLOFORK 0x8000 /* close on fork receiving fd */ 508 509 struct mmsghdr { 510 struct msghdr msg_hdr; 511 unsigned int msg_len; 512 }; 513 #endif 514 515 /* Extra flags used internally only */ 516 #define MSG_USERFLAGS 0x0ffffff 517 #define MSG_NAMEMBUF 0x1000000 /* msg_name is an mbuf */ 518 #define MSG_CONTROLMBUF 0x2000000 /* msg_control is an mbuf */ 519 #define MSG_IOVUSRSPACE 0x4000000 /* msg_iov is in user space */ 520 #define MSG_LENUSRSPACE 0x8000000 /* address length is in user space */ 521 522 /* 523 * Header for ancillary data objects in msg_control buffer. 524 * Used for additional information with/about a datagram 525 * not expressible by flags. The format is a sequence 526 * of message elements headed by cmsghdr structures. 527 */ 528 struct cmsghdr { 529 socklen_t cmsg_len; /* data byte count, including hdr */ 530 int cmsg_level; /* originating protocol */ 531 int cmsg_type; /* protocol-specific type */ 532 /* followed by unsigned char cmsg_data[]; */ 533 }; 534 535 /* 536 * Alignment requirement for CMSG struct manipulation. 537 * This basically behaves the same as ALIGN() ARCH/include/param.h. 538 * We declare it separately for two reasons: 539 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's 540 * idea of ALIGNBYTES at runtime. 541 * without (2), we can't guarantee binary compatibility in case of future 542 * changes in ALIGNBYTES. 543 */ 544 #define __CMSG_ALIGN(n) (((n) + __ALIGNBYTES) & ~__ALIGNBYTES) 545 546 #ifdef _KERNEL 547 #define CMSG_ALIGN(n) __CMSG_ALIGN(n) 548 #endif 549 550 #define __CMSG_ASIZE __CMSG_ALIGN(sizeof(struct cmsghdr)) 551 #define __CMSG_MSGNEXT(cmsg) \ 552 (__CASTV(char *, cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len)) 553 #define __CMSG_MSGEND(mhdr) \ 554 (__CASTV(char *, (mhdr)->msg_control) + (mhdr)->msg_controllen) 555 556 /* given pointer to struct cmsghdr, return pointer to data */ 557 #define CMSG_DATA(cmsg) (__CASTV(unsigned char *, cmsg) + __CMSG_ASIZE) 558 #define CCMSG_DATA(cmsg) (__CASTCV(const unsigned char *, cmsg) + __CMSG_ASIZE) 559 560 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */ 561 #define CMSG_NXTHDR(mhdr, cmsg) \ 562 __CASTV(struct cmsghdr *, \ 563 __CMSG_MSGNEXT(cmsg) + __CMSG_ASIZE > __CMSG_MSGEND(mhdr) ? 0 : \ 564 __CMSG_MSGNEXT(cmsg)) 565 566 /* 567 * RFC 2292 requires to check msg_controllen, in case that the kernel returns 568 * an empty list for some reasons. 569 */ 570 #define CMSG_FIRSTHDR(mhdr) \ 571 __CASTV(struct cmsghdr *, \ 572 (mhdr)->msg_controllen < sizeof(struct cmsghdr) ? 0 : \ 573 (mhdr)->msg_control) 574 575 #define CMSG_SPACE(l) (__CMSG_ASIZE + __CMSG_ALIGN(l)) 576 #define CMSG_LEN(l) (__CMSG_ASIZE + (l)) 577 578 /* "Socket"-level control message types: */ 579 #define SCM_RIGHTS 0x01 /* access rights (array of int) */ 580 #if defined(_NETBSD_SOURCE) 581 /* 0x02 timestamp (struct timeval50) */ 582 /* 0x04 credentials (struct sockcred70) */ 583 #define SCM_TIMESTAMP 0x08 /* timestamp (struct timeval) */ 584 #define SCM_CREDS 0x10 /* credentials (struct sockcred) */ 585 #endif 586 587 /* 588 * Types of socket shutdown(2). 589 */ 590 #define SHUT_RD 0 /* Disallow further receives. */ 591 #define SHUT_WR 1 /* Disallow further sends. */ 592 #define SHUT_RDWR 2 /* Disallow further sends/receives. */ 593 594 #ifdef _KERNEL 595 static __inline socklen_t 596 sockaddr_getlen(const struct sockaddr *sa) 597 { 598 return sa->sa_len; 599 } 600 601 __BEGIN_DECLS 602 socklen_t sockaddr_getsize_by_family(sa_family_t); 603 struct sockaddr *sockaddr_copy(struct sockaddr *, socklen_t, 604 const struct sockaddr *); 605 struct sockaddr *sockaddr_externalize(struct sockaddr *, socklen_t, 606 const struct sockaddr *); 607 struct sockaddr *sockaddr_alloc(sa_family_t, socklen_t, int); 608 const void *sockaddr_const_addr(const struct sockaddr *, socklen_t *); 609 void *sockaddr_addr(struct sockaddr *, socklen_t *); 610 const struct sockaddr *sockaddr_any(const struct sockaddr *); 611 const struct sockaddr *sockaddr_any_by_family(sa_family_t); 612 const void *sockaddr_anyaddr(const struct sockaddr *, socklen_t *); 613 int sockaddr_cmp(const struct sockaddr *, const struct sockaddr *); 614 struct sockaddr *sockaddr_dup(const struct sockaddr *, int); 615 int sockaddr_format(const struct sockaddr *, char *, size_t); 616 void sockaddr_free(struct sockaddr *); 617 __END_DECLS 618 #endif /* _KERNEL */ 619 620 #ifndef _KERNEL 621 622 __BEGIN_DECLS 623 int accept(int, struct sockaddr * __restrict, socklen_t * __restrict); 624 int accept4(int, struct sockaddr * __restrict, socklen_t * __restrict, int); 625 int bind(int, const struct sockaddr *, socklen_t); 626 int connect(int, const struct sockaddr *, socklen_t); 627 int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict); 628 int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict); 629 int getsockopt(int, int, int, void *__restrict, socklen_t * __restrict); 630 int getsockopt2(int, int, int, void *__restrict, socklen_t * __restrict); 631 int listen(int, int); 632 int paccept(int, struct sockaddr * __restrict, socklen_t * __restrict, 633 const sigset_t * __restrict, int); 634 ssize_t recv(int, void *, size_t, int); 635 ssize_t recvfrom(int, void *__restrict, size_t, int, 636 struct sockaddr * __restrict, socklen_t * __restrict); 637 ssize_t recvmsg(int, struct msghdr *, int); 638 ssize_t send(int, const void *, size_t, int); 639 ssize_t sendto(int, const void *, 640 size_t, int, const struct sockaddr *, socklen_t); 641 ssize_t sendmsg(int, const struct msghdr *, int); 642 int setsockopt(int, int, int, const void *, socklen_t); 643 int shutdown(int, int); 644 int sockatmark(int); 645 int socket(int, int, int) 646 #if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE) 647 __RENAME(__socket30) 648 #endif 649 ; 650 int socketpair(int, int, int, int *); 651 652 #if defined(_NETBSD_SOURCE) 653 int sendmmsg(int, struct mmsghdr *, unsigned int, unsigned int); 654 struct timespec; 655 int recvmmsg(int, struct mmsghdr *, unsigned int, unsigned int, 656 struct timespec *); 657 #endif 658 __END_DECLS 659 #endif /* !_KERNEL */ 660 661 #endif /* !_SYS_SOCKET_H_ */ 662
Indexes created Sun Sep 21 18:09:52 GMT 2025