The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/socket.h

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    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: releng/10.2/sys/sys/socket.h 254925 2013-08-26 18:16:05Z jhb $
   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 #include <machine/_align.h>
   40 
   41 /*
   42  * Definitions related to sockets: types, address families, options.
   43  */
   44 
   45 /*
   46  * Data types.
   47  */
   48 #if __BSD_VISIBLE
   49 #ifndef _GID_T_DECLARED
   50 typedef __gid_t         gid_t;
   51 #define _GID_T_DECLARED
   52 #endif
   53 
   54 #ifndef _OFF_T_DECLARED
   55 typedef __off_t         off_t;
   56 #define _OFF_T_DECLARED
   57 #endif
   58 
   59 #ifndef _PID_T_DECLARED
   60 typedef __pid_t         pid_t;
   61 #define _PID_T_DECLARED
   62 #endif
   63 #endif
   64 
   65 #ifndef _SA_FAMILY_T_DECLARED
   66 typedef __sa_family_t   sa_family_t;
   67 #define _SA_FAMILY_T_DECLARED
   68 #endif
   69 
   70 #ifndef _SOCKLEN_T_DECLARED
   71 typedef __socklen_t     socklen_t;
   72 #define _SOCKLEN_T_DECLARED
   73 #endif
   74  
   75 #ifndef _SSIZE_T_DECLARED
   76 typedef __ssize_t       ssize_t;
   77 #define _SSIZE_T_DECLARED
   78 #endif
   79 
   80 #if __BSD_VISIBLE 
   81 #ifndef _UID_T_DECLARED
   82 typedef __uid_t         uid_t;
   83 #define _UID_T_DECLARED
   84 #endif
   85 #endif
   86 
   87 /*
   88  * Types
   89  */
   90 #define SOCK_STREAM     1               /* stream socket */
   91 #define SOCK_DGRAM      2               /* datagram socket */
   92 #define SOCK_RAW        3               /* raw-protocol interface */
   93 #if __BSD_VISIBLE
   94 #define SOCK_RDM        4               /* reliably-delivered message */
   95 #endif
   96 #define SOCK_SEQPACKET  5               /* sequenced packet stream */
   97 
   98 #if __BSD_VISIBLE
   99 /*
  100  * Creation flags, OR'ed into socket() and socketpair() type argument.
  101  */
  102 #define SOCK_CLOEXEC    0x10000000
  103 #define SOCK_NONBLOCK   0x20000000
  104 #endif
  105 
  106 /*
  107  * Option flags per-socket.
  108  */
  109 #define SO_DEBUG        0x0001          /* turn on debugging info recording */
  110 #define SO_ACCEPTCONN   0x0002          /* socket has had listen() */
  111 #define SO_REUSEADDR    0x0004          /* allow local address reuse */
  112 #define SO_KEEPALIVE    0x0008          /* keep connections alive */
  113 #define SO_DONTROUTE    0x0010          /* just use interface addresses */
  114 #define SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
  115 #if __BSD_VISIBLE
  116 #define SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
  117 #endif
  118 #define SO_LINGER       0x0080          /* linger on close if data present */
  119 #define SO_OOBINLINE    0x0100          /* leave received OOB data in line */
  120 #if __BSD_VISIBLE
  121 #define SO_REUSEPORT    0x0200          /* allow local address & port reuse */
  122 #define SO_TIMESTAMP    0x0400          /* timestamp received dgram traffic */
  123 #define SO_NOSIGPIPE    0x0800          /* no SIGPIPE from EPIPE */
  124 #define SO_ACCEPTFILTER 0x1000          /* there is an accept filter */
  125 #define SO_BINTIME      0x2000          /* timestamp received dgram traffic */
  126 #endif
  127 #define SO_NO_OFFLOAD   0x4000          /* socket cannot be offloaded */
  128 #define SO_NO_DDP       0x8000          /* disable direct data placement */
  129 
  130 /*
  131  * Additional options, not kept in so_options.
  132  */
  133 #define SO_SNDBUF       0x1001          /* send buffer size */
  134 #define SO_RCVBUF       0x1002          /* receive buffer size */
  135 #define SO_SNDLOWAT     0x1003          /* send low-water mark */
  136 #define SO_RCVLOWAT     0x1004          /* receive low-water mark */
  137 #define SO_SNDTIMEO     0x1005          /* send timeout */
  138 #define SO_RCVTIMEO     0x1006          /* receive timeout */
  139 #define SO_ERROR        0x1007          /* get error status and clear */
  140 #define SO_TYPE         0x1008          /* get socket type */
  141 #if __BSD_VISIBLE
  142 #define SO_LABEL        0x1009          /* socket's MAC label */
  143 #define SO_PEERLABEL    0x1010          /* socket's peer's MAC label */
  144 #define SO_LISTENQLIMIT 0x1011          /* socket's backlog limit */
  145 #define SO_LISTENQLEN   0x1012          /* socket's complete queue length */
  146 #define SO_LISTENINCQLEN        0x1013  /* socket's incomplete queue length */
  147 #define SO_SETFIB       0x1014          /* use this FIB to route */
  148 #define SO_USER_COOKIE  0x1015          /* user cookie (dummynet etc.) */
  149 #define SO_PROTOCOL     0x1016          /* get socket protocol (Linux name) */
  150 #define SO_PROTOTYPE    SO_PROTOCOL     /* alias for SO_PROTOCOL (SunOS name) */
  151 #endif
  152 
  153 /*
  154  * Space reserved for new socket options added by third-party vendors.
  155  * This range applies to all socket option levels.  New socket options
  156  * in FreeBSD should always use an option value less than SO_VENDOR.
  157  */
  158 #if __BSD_VISIBLE
  159 #define SO_VENDOR       0x80000000
  160 #endif
  161 
  162 /*
  163  * Structure used for manipulating linger option.
  164  */
  165 struct linger {
  166         int     l_onoff;                /* option on/off */
  167         int     l_linger;               /* linger time */
  168 };
  169 
  170 #if __BSD_VISIBLE
  171 struct accept_filter_arg {
  172         char    af_name[16];
  173         char    af_arg[256-16];
  174 };
  175 #endif
  176 
  177 /*
  178  * Level number for (get/set)sockopt() to apply to socket itself.
  179  */
  180 #define SOL_SOCKET      0xffff          /* options for socket level */
  181 
  182 /*
  183  * Address families.
  184  */
  185 #define AF_UNSPEC       0               /* unspecified */
  186 #if __BSD_VISIBLE
  187 #define AF_LOCAL        AF_UNIX         /* local to host (pipes, portals) */
  188 #endif
  189 #define AF_UNIX         1               /* standardized name for AF_LOCAL */
  190 #define AF_INET         2               /* internetwork: UDP, TCP, etc. */
  191 #if __BSD_VISIBLE
  192 #define AF_IMPLINK      3               /* arpanet imp addresses */
  193 #define AF_PUP          4               /* pup protocols: e.g. BSP */
  194 #define AF_CHAOS        5               /* mit CHAOS protocols */
  195 #define AF_NETBIOS      6               /* SMB protocols */
  196 #define AF_ISO          7               /* ISO protocols */
  197 #define AF_OSI          AF_ISO
  198 #define AF_ECMA         8               /* European computer manufacturers */
  199 #define AF_DATAKIT      9               /* datakit protocols */
  200 #define AF_CCITT        10              /* CCITT protocols, X.25 etc */
  201 #define AF_SNA          11              /* IBM SNA */
  202 #define AF_DECnet       12              /* DECnet */
  203 #define AF_DLI          13              /* DEC Direct data link interface */
  204 #define AF_LAT          14              /* LAT */
  205 #define AF_HYLINK       15              /* NSC Hyperchannel */
  206 #define AF_APPLETALK    16              /* Apple Talk */
  207 #define AF_ROUTE        17              /* Internal Routing Protocol */
  208 #define AF_LINK         18              /* Link layer interface */
  209 #define pseudo_AF_XTP   19              /* eXpress Transfer Protocol (no AF) */
  210 #define AF_COIP         20              /* connection-oriented IP, aka ST II */
  211 #define AF_CNT          21              /* Computer Network Technology */
  212 #define pseudo_AF_RTIP  22              /* Help Identify RTIP packets */
  213 #define AF_IPX          23              /* Novell Internet Protocol */
  214 #define AF_SIP          24              /* Simple Internet Protocol */
  215 #define pseudo_AF_PIP   25              /* Help Identify PIP packets */
  216 #define AF_ISDN         26              /* Integrated Services Digital Network*/
  217 #define AF_E164         AF_ISDN         /* CCITT E.164 recommendation */
  218 #define pseudo_AF_KEY   27              /* Internal key-management function */
  219 #endif
  220 #define AF_INET6        28              /* IPv6 */
  221 #if __BSD_VISIBLE
  222 #define AF_NATM         29              /* native ATM access */
  223 #define AF_ATM          30              /* ATM */
  224 #define pseudo_AF_HDRCMPLT 31           /* Used by BPF to not rewrite headers
  225                                          * in interface output routine
  226                                          */
  227 #define AF_NETGRAPH     32              /* Netgraph sockets */
  228 #define AF_SLOW         33              /* 802.3ad slow protocol */
  229 #define AF_SCLUSTER     34              /* Sitara cluster protocol */
  230 #define AF_ARP          35
  231 #define AF_BLUETOOTH    36              /* Bluetooth sockets */
  232 #define AF_IEEE80211    37              /* IEEE 802.11 protocol */
  233 #define AF_INET_SDP     40              /* OFED Socket Direct Protocol ipv4 */
  234 #define AF_INET6_SDP    42              /* OFED Socket Direct Protocol ipv6 */
  235 #define AF_MAX          42
  236 /*
  237  * When allocating a new AF_ constant, please only allocate
  238  * even numbered constants for FreeBSD until 134 as odd numbered AF_
  239  * constants 39-133 are now reserved for vendors.
  240  */
  241 #define AF_VENDOR00 39
  242 #define AF_VENDOR01 41
  243 #define AF_VENDOR02 43
  244 #define AF_VENDOR03 45
  245 #define AF_VENDOR04 47
  246 #define AF_VENDOR05 49
  247 #define AF_VENDOR06 51
  248 #define AF_VENDOR07 53
  249 #define AF_VENDOR08 55
  250 #define AF_VENDOR09 57
  251 #define AF_VENDOR10 59
  252 #define AF_VENDOR11 61
  253 #define AF_VENDOR12 63
  254 #define AF_VENDOR13 65
  255 #define AF_VENDOR14 67
  256 #define AF_VENDOR15 69
  257 #define AF_VENDOR16 71
  258 #define AF_VENDOR17 73
  259 #define AF_VENDOR18 75
  260 #define AF_VENDOR19 77
  261 #define AF_VENDOR20 79
  262 #define AF_VENDOR21 81
  263 #define AF_VENDOR22 83
  264 #define AF_VENDOR23 85
  265 #define AF_VENDOR24 87
  266 #define AF_VENDOR25 89
  267 #define AF_VENDOR26 91
  268 #define AF_VENDOR27 93
  269 #define AF_VENDOR28 95
  270 #define AF_VENDOR29 97
  271 #define AF_VENDOR30 99
  272 #define AF_VENDOR31 101
  273 #define AF_VENDOR32 103
  274 #define AF_VENDOR33 105
  275 #define AF_VENDOR34 107
  276 #define AF_VENDOR35 109
  277 #define AF_VENDOR36 111
  278 #define AF_VENDOR37 113
  279 #define AF_VENDOR38 115
  280 #define AF_VENDOR39 117
  281 #define AF_VENDOR40 119
  282 #define AF_VENDOR41 121
  283 #define AF_VENDOR42 123
  284 #define AF_VENDOR43 125
  285 #define AF_VENDOR44 127
  286 #define AF_VENDOR45 129
  287 #define AF_VENDOR46 131
  288 #define AF_VENDOR47 133
  289 #endif
  290 
  291 /*
  292  * Structure used by kernel to store most
  293  * addresses.
  294  */
  295 struct sockaddr {
  296         unsigned char   sa_len;         /* total length */
  297         sa_family_t     sa_family;      /* address family */
  298         char            sa_data[14];    /* actually longer; address value */
  299 };
  300 #if __BSD_VISIBLE
  301 #define SOCK_MAXADDRLEN 255             /* longest possible addresses */
  302 
  303 /*
  304  * Structure used by kernel to pass protocol
  305  * information in raw sockets.
  306  */
  307 struct sockproto {
  308         unsigned short  sp_family;              /* address family */
  309         unsigned short  sp_protocol;            /* protocol */
  310 };
  311 #endif
  312 
  313 #include <sys/_sockaddr_storage.h>
  314 
  315 #if __BSD_VISIBLE
  316 /*
  317  * Protocol families, same as address families for now.
  318  */
  319 #define PF_UNSPEC       AF_UNSPEC
  320 #define PF_LOCAL        AF_LOCAL
  321 #define PF_UNIX         PF_LOCAL        /* backward compatibility */
  322 #define PF_INET         AF_INET
  323 #define PF_IMPLINK      AF_IMPLINK
  324 #define PF_PUP          AF_PUP
  325 #define PF_CHAOS        AF_CHAOS
  326 #define PF_NETBIOS      AF_NETBIOS
  327 #define PF_ISO          AF_ISO
  328 #define PF_OSI          AF_ISO
  329 #define PF_ECMA         AF_ECMA
  330 #define PF_DATAKIT      AF_DATAKIT
  331 #define PF_CCITT        AF_CCITT
  332 #define PF_SNA          AF_SNA
  333 #define PF_DECnet       AF_DECnet
  334 #define PF_DLI          AF_DLI
  335 #define PF_LAT          AF_LAT
  336 #define PF_HYLINK       AF_HYLINK
  337 #define PF_APPLETALK    AF_APPLETALK
  338 #define PF_ROUTE        AF_ROUTE
  339 #define PF_LINK         AF_LINK
  340 #define PF_XTP          pseudo_AF_XTP   /* really just proto family, no AF */
  341 #define PF_COIP         AF_COIP
  342 #define PF_CNT          AF_CNT
  343 #define PF_SIP          AF_SIP
  344 #define PF_IPX          AF_IPX
  345 #define PF_RTIP         pseudo_AF_RTIP  /* same format as AF_INET */
  346 #define PF_PIP          pseudo_AF_PIP
  347 #define PF_ISDN         AF_ISDN
  348 #define PF_KEY          pseudo_AF_KEY
  349 #define PF_INET6        AF_INET6
  350 #define PF_NATM         AF_NATM
  351 #define PF_ATM          AF_ATM
  352 #define PF_NETGRAPH     AF_NETGRAPH
  353 #define PF_SLOW         AF_SLOW
  354 #define PF_SCLUSTER     AF_SCLUSTER
  355 #define PF_ARP          AF_ARP
  356 #define PF_BLUETOOTH    AF_BLUETOOTH
  357 #define PF_IEEE80211    AF_IEEE80211
  358 #define PF_INET_SDP     AF_INET_SDP
  359 #define PF_INET6_SDP    AF_INET6_SDP
  360 
  361 #define PF_MAX          AF_MAX
  362 
  363 /*
  364  * Definitions for network related sysctl, CTL_NET.
  365  *
  366  * Second level is protocol family.
  367  * Third level is protocol number.
  368  *
  369  * Further levels are defined by the individual families below.
  370  */
  371 #define NET_MAXID       AF_MAX
  372 
  373 /*
  374  * PF_ROUTE - Routing table
  375  *
  376  * Three additional levels are defined:
  377  *      Fourth: address family, 0 is wildcard
  378  *      Fifth: type of info, defined below
  379  *      Sixth: flag(s) to mask with for NET_RT_FLAGS
  380  */
  381 #define NET_RT_DUMP     1               /* dump; may limit to a.f. */
  382 #define NET_RT_FLAGS    2               /* by flags, e.g. RESOLVING */
  383 #define NET_RT_IFLIST   3               /* survey interface list */
  384 #define NET_RT_IFMALIST 4               /* return multicast address list */
  385 #define NET_RT_IFLISTL  5               /* Survey interface list, using 'l'en
  386                                          * versions of msghdr structs. */
  387 #define NET_RT_MAXID    6
  388 
  389 #endif /* __BSD_VISIBLE */
  390 
  391 /*
  392  * Maximum queue length specifiable by listen.
  393  */
  394 #define SOMAXCONN       128
  395 
  396 /*
  397  * Message header for recvmsg and sendmsg calls.
  398  * Used value-result for recvmsg, value only for sendmsg.
  399  */
  400 struct msghdr {
  401         void            *msg_name;              /* optional address */
  402         socklen_t        msg_namelen;           /* size of address */
  403         struct iovec    *msg_iov;               /* scatter/gather array */
  404         int              msg_iovlen;            /* # elements in msg_iov */
  405         void            *msg_control;           /* ancillary data, see below */
  406         socklen_t        msg_controllen;        /* ancillary data buffer len */
  407         int              msg_flags;             /* flags on received message */
  408 };
  409 
  410 #define MSG_OOB         0x1             /* process out-of-band data */
  411 #define MSG_PEEK        0x2             /* peek at incoming message */
  412 #define MSG_DONTROUTE   0x4             /* send without using routing tables */
  413 #define MSG_EOR         0x8             /* data completes record */
  414 #define MSG_TRUNC       0x10            /* data discarded before delivery */
  415 #define MSG_CTRUNC      0x20            /* control data lost before delivery */
  416 #define MSG_WAITALL     0x40            /* wait for full request or error */
  417 #if __POSIX_VISIBLE >= 200809
  418 #define MSG_NOSIGNAL    0x20000         /* do not generate SIGPIPE on EOF */
  419 #endif
  420 #if __BSD_VISIBLE
  421 #define MSG_DONTWAIT    0x80            /* this message should be nonblocking */
  422 #define MSG_EOF         0x100           /* data completes connection */
  423 #define MSG_NOTIFICATION 0x2000         /* SCTP notification */
  424 #define MSG_NBIO        0x4000          /* FIONBIO mode, used by fifofs */
  425 #define MSG_COMPAT      0x8000          /* used in sendit() */
  426 #define MSG_CMSG_CLOEXEC 0x40000        /* make received fds close-on-exec */
  427 #endif
  428 #ifdef _KERNEL
  429 #define MSG_SOCALLBCK   0x10000         /* for use by socket callbacks - soreceive (TCP) */
  430 #endif
  431 
  432 /*
  433  * Header for ancillary data objects in msg_control buffer.
  434  * Used for additional information with/about a datagram
  435  * not expressible by flags.  The format is a sequence
  436  * of message elements headed by cmsghdr structures.
  437  */
  438 struct cmsghdr {
  439         socklen_t       cmsg_len;               /* data byte count, including hdr */
  440         int             cmsg_level;             /* originating protocol */
  441         int             cmsg_type;              /* protocol-specific type */
  442 /* followed by  u_char  cmsg_data[]; */
  443 };
  444 
  445 #if __BSD_VISIBLE
  446 /*
  447  * While we may have more groups than this, the cmsgcred struct must
  448  * be able to fit in an mbuf and we have historically supported a
  449  * maximum of 16 groups.
  450 */
  451 #define CMGROUP_MAX 16
  452 
  453 /*
  454  * Credentials structure, used to verify the identity of a peer
  455  * process that has sent us a message. This is allocated by the
  456  * peer process but filled in by the kernel. This prevents the
  457  * peer from lying about its identity. (Note that cmcred_groups[0]
  458  * is the effective GID.)
  459  */
  460 struct cmsgcred {
  461         pid_t   cmcred_pid;             /* PID of sending process */
  462         uid_t   cmcred_uid;             /* real UID of sending process */
  463         uid_t   cmcred_euid;            /* effective UID of sending process */
  464         gid_t   cmcred_gid;             /* real GID of sending process */
  465         short   cmcred_ngroups;         /* number or groups */
  466         gid_t   cmcred_groups[CMGROUP_MAX];     /* groups */
  467 };
  468 
  469 /*
  470  * Socket credentials.
  471  */
  472 struct sockcred {
  473         uid_t   sc_uid;                 /* real user id */
  474         uid_t   sc_euid;                /* effective user id */
  475         gid_t   sc_gid;                 /* real group id */
  476         gid_t   sc_egid;                /* effective group id */
  477         int     sc_ngroups;             /* number of supplemental groups */
  478         gid_t   sc_groups[1];           /* variable length */
  479 };
  480 
  481 /*
  482  * Compute size of a sockcred structure with groups.
  483  */
  484 #define SOCKCREDSIZE(ngrps) \
  485         (sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
  486 
  487 #endif /* __BSD_VISIBLE */
  488 
  489 /* given pointer to struct cmsghdr, return pointer to data */
  490 #define CMSG_DATA(cmsg)         ((unsigned char *)(cmsg) + \
  491                                  _ALIGN(sizeof(struct cmsghdr)))
  492 
  493 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
  494 #define CMSG_NXTHDR(mhdr, cmsg) \
  495         ((char *)(cmsg) == NULL ? CMSG_FIRSTHDR(mhdr) : \
  496             ((char *)(cmsg) + _ALIGN(((struct cmsghdr *)(cmsg))->cmsg_len) + \
  497           _ALIGN(sizeof(struct cmsghdr)) > \
  498             (char *)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
  499             (struct cmsghdr *)0 : \
  500             (struct cmsghdr *)(void *)((char *)(cmsg) + \
  501             _ALIGN(((struct cmsghdr *)(cmsg))->cmsg_len)))
  502 
  503 /*
  504  * RFC 2292 requires to check msg_controllen, in case that the kernel returns
  505  * an empty list for some reasons.
  506  */
  507 #define CMSG_FIRSTHDR(mhdr) \
  508         ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
  509          (struct cmsghdr *)(mhdr)->msg_control : \
  510          (struct cmsghdr *)NULL)
  511 
  512 #if __BSD_VISIBLE
  513 /* RFC 2292 additions */
  514 #define CMSG_SPACE(l)           (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
  515 #define CMSG_LEN(l)             (_ALIGN(sizeof(struct cmsghdr)) + (l))
  516 #endif
  517 
  518 #ifdef _KERNEL
  519 #define CMSG_ALIGN(n)   _ALIGN(n)
  520 #endif
  521 
  522 /* "Socket"-level control message types: */
  523 #define SCM_RIGHTS      0x01            /* access rights (array of int) */
  524 #if __BSD_VISIBLE
  525 #define SCM_TIMESTAMP   0x02            /* timestamp (struct timeval) */
  526 #define SCM_CREDS       0x03            /* process creds (struct cmsgcred) */
  527 #define SCM_BINTIME     0x04            /* timestamp (struct bintime) */
  528 #endif
  529 
  530 #if __BSD_VISIBLE
  531 /*
  532  * 4.3 compat sockaddr, move to compat file later
  533  */
  534 struct osockaddr {
  535         unsigned short sa_family;       /* address family */
  536         char    sa_data[14];            /* up to 14 bytes of direct address */
  537 };
  538 
  539 /*
  540  * 4.3-compat message header (move to compat file later).
  541  */
  542 struct omsghdr {
  543         char    *msg_name;              /* optional address */
  544         int     msg_namelen;            /* size of address */
  545         struct  iovec *msg_iov;         /* scatter/gather array */
  546         int     msg_iovlen;             /* # elements in msg_iov */
  547         char    *msg_accrights;         /* access rights sent/received */
  548         int     msg_accrightslen;
  549 };
  550 #endif
  551 
  552 /*
  553  * howto arguments for shutdown(2), specified by Posix.1g.
  554  */
  555 #define SHUT_RD         0               /* shut down the reading side */
  556 #define SHUT_WR         1               /* shut down the writing side */
  557 #define SHUT_RDWR       2               /* shut down both sides */
  558 
  559 #if __BSD_VISIBLE
  560 /* for SCTP */
  561 /* we cheat and use the SHUT_XX defines for these */
  562 #define PRU_FLUSH_RD     SHUT_RD
  563 #define PRU_FLUSH_WR     SHUT_WR
  564 #define PRU_FLUSH_RDWR   SHUT_RDWR
  565 #endif
  566 
  567 
  568 #if __BSD_VISIBLE
  569 /*
  570  * sendfile(2) header/trailer struct
  571  */
  572 struct sf_hdtr {
  573         struct iovec *headers;  /* pointer to an array of header struct iovec's */
  574         int hdr_cnt;            /* number of header iovec's */
  575         struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
  576         int trl_cnt;            /* number of trailer iovec's */
  577 };
  578 
  579 /*
  580  * Sendfile-specific flag(s)
  581  */
  582 #define SF_NODISKIO     0x00000001
  583 #define SF_MNOWAIT      0x00000002
  584 #define SF_SYNC         0x00000004
  585 
  586 #ifdef _KERNEL
  587 #define SFK_COMPAT      0x00000001
  588 #endif /* _KERNEL */
  589 #endif /* __BSD_VISIBLE */
  590 
  591 #ifndef _KERNEL
  592 
  593 #include <sys/cdefs.h>
  594 
  595 __BEGIN_DECLS
  596 int     accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
  597 int     bind(int, const struct sockaddr *, socklen_t);
  598 int     connect(int, const struct sockaddr *, socklen_t);
  599 #if __BSD_VISIBLE
  600 int     accept4(int, struct sockaddr * __restrict, socklen_t * __restrict, int);
  601 int     bindat(int, int, const struct sockaddr *, socklen_t);
  602 int     connectat(int, int, const struct sockaddr *, socklen_t);
  603 #endif
  604 int     getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
  605 int     getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
  606 int     getsockopt(int, int, int, void * __restrict, socklen_t * __restrict);
  607 int     listen(int, int);
  608 ssize_t recv(int, void *, size_t, int);
  609 ssize_t recvfrom(int, void *, size_t, int, struct sockaddr * __restrict, socklen_t * __restrict);
  610 ssize_t recvmsg(int, struct msghdr *, int);
  611 ssize_t send(int, const void *, size_t, int);
  612 ssize_t sendto(int, const void *,
  613             size_t, int, const struct sockaddr *, socklen_t);
  614 ssize_t sendmsg(int, const struct msghdr *, int);
  615 #if __BSD_VISIBLE
  616 int     sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
  617 int     setfib(int);
  618 #endif
  619 int     setsockopt(int, int, int, const void *, socklen_t);
  620 int     shutdown(int, int);
  621 int     sockatmark(int);
  622 int     socket(int, int, int);
  623 int     socketpair(int, int, int, int *);
  624 __END_DECLS
  625 
  626 #endif /* !_KERNEL */
  627 
  628 #ifdef _KERNEL
  629 struct socket;
  630 
  631 struct tcpcb *so_sototcpcb(struct socket *so);
  632 struct inpcb *so_sotoinpcb(struct socket *so);
  633 struct sockbuf *so_sockbuf_snd(struct socket *);
  634 struct sockbuf *so_sockbuf_rcv(struct socket *);
  635 
  636 int so_state_get(const struct socket *);
  637 void so_state_set(struct socket *, int);
  638 
  639 int so_options_get(const struct socket *);
  640 void so_options_set(struct socket *, int);
  641 
  642 int so_error_get(const struct socket *);
  643 void so_error_set(struct socket *, int);
  644 
  645 int so_linger_get(const struct socket *);
  646 void so_linger_set(struct socket *, int);
  647 
  648 struct protosw *so_protosw_get(const struct socket *);
  649 void so_protosw_set(struct socket *, struct protosw *);
  650 
  651 void so_sorwakeup_locked(struct socket *so);
  652 void so_sowwakeup_locked(struct socket *so);
  653 
  654 void so_sorwakeup(struct socket *so);
  655 void so_sowwakeup(struct socket *so);
  656 
  657 void so_lock(struct socket *so);
  658 void so_unlock(struct socket *so);
  659 
  660 void so_listeners_apply_all(struct socket *so, void (*func)(struct socket *, void *), void *arg);
  661 
  662 #endif
  663 
  664 
  665 #endif /* !_SYS_SOCKET_H_ */

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